init

android/.gitignore

@@ -0,0 +1,9 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.cxx

android/build.gradle

@@ -0,0 +1,60 @@
+group = "com.xiarui.zhiwen"
+version = "1.0"
+
+buildscript {
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("com.android.tools.build:gradle:7.3.0")
+    }
+}
+
+rootProject.allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+apply plugin: "com.android.library"
+
+android {
+    if (project.android.hasProperty("namespace")) {
+        namespace = "com.xiarui.zhiwen"
+    }
+
+    compileSdk = 34
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
+    defaultConfig {
+        minSdk = 21
+    }
+
+    sourceSets {
+        main {
+            jniLibs.srcDirs = ['libs']
+        }
+    }
+
+    dependencies {
+        testImplementation("junit:junit:4.13.2")
+        testImplementation("org.mockito:mockito-core:5.0.0")
+    }
+
+    testOptions {
+        unitTests.all {
+            testLogging {
+               events "passed", "skipped", "failed", "standardOut", "standardError"
+               outputs.upToDateWhen {false}
+               showStandardStreams = true
+            }
+        }
+    }
+}

android/settings.gradle

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+rootProject.name = 'zhiwen'

android/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="com.xiarui.zhiwen">
+<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+</manifest>

android/src/main/java/android_serialport_api/ComBean.java

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+package android_serialport_api;
+
+import java.text.SimpleDateFormat;
+
+/**
+ * @author benjaminwan
+ */
+public class ComBean {
+		public byte[] bRec=null;
+		public String sRecTime="";
+		public String sComPort="";
+		public int nSize = 0;
+		public ComBean(String sPort,byte[] buffer,int size){
+			sComPort=sPort;
+			bRec=new byte[size];
+            System.arraycopy(buffer, 0, bRec, 0, size);
+			nSize = size;
+			SimpleDateFormat sDateFormat = new SimpleDateFormat("hh:mm:ss");       
+			sRecTime = sDateFormat.format(new java.util.Date()); 
+		}
+}

android/src/main/java/android_serialport_api/SerialHelper.java

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+package android_serialport_api;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.security.InvalidParameterException;
+
+import com.xiarui.zhiwen.DevComm;
+
+import android_serialport_api.ComBean;
+import android_serialport_api.SerialPort;
+
+
+public abstract class SerialHelper{
+	private SerialPort mSerialPort;
+	private OutputStream mOutputStream;
+	private InputStream mInputStream;
+	private ReadThread mReadThread;
+	private SendThread mSendThread;
+	private String sPort="/dev/s3c2410_serial0";
+	private int iBaudRate=9600;
+	private boolean _isOpen=false;
+	private byte[] _bLoopData=new byte[]{0x30};
+	private int iDelay=500;
+	//----------------------------------------------------
+	public SerialHelper(String sPort,int iBaudRate){
+		this.sPort = sPort;
+		this.iBaudRate=iBaudRate;
+	}
+	public SerialHelper(){
+		this("/dev/s3c2410_serial0",9600);
+	}
+	public SerialHelper(String sPort){
+		this(sPort,9600);
+	}
+	public SerialHelper(String sPort,String sBaudRate){
+		this(sPort,Integer.parseInt(sBaudRate));
+	}
+	//----------------------------------------------------
+	public void open() throws SecurityException, IOException,InvalidParameterException{
+		mSerialPort =  new SerialPort(new File(sPort), iBaudRate, 0);
+		mOutputStream = mSerialPort.getOutputStream();
+		mInputStream = mSerialPort.getInputStream();
+		mReadThread = new ReadThread();
+		mReadThread.start();
+		mSendThread = new SendThread();
+		mSendThread.setSuspendFlag();
+		mSendThread.start();
+		_isOpen=true;
+	}
+	//----------------------------------------------------
+	public void close(){
+		if (mReadThread != null)
+			mReadThread.interrupt();
+		if (mSerialPort != null) {
+			mSerialPort.close();
+			mSerialPort = null;
+		}
+		_isOpen=false;
+	}
+	//----------------------------------------------------
+	public void send(byte[] bOutArray, int nSize){
+		try
+		{
+			mOutputStream.write(bOutArray, 0, nSize);
+		} catch (IOException e)
+		{
+			e.printStackTrace();
+		}
+	}
+	//----------------------------------------------------
+	public void sendTxt(String sTxt){
+		byte[] bOutArray =sTxt.getBytes();
+		send(bOutArray, sTxt.length());
+	}
+	//----------------------------------------------------
+	private class ReadThread extends Thread {
+		@Override
+		public void run() {
+			super.run();
+			while(!isInterrupted()) {
+				try
+				{
+					if (mInputStream == null) return;
+					byte[] buffer=new byte[DevComm.MAX_DATA_LEN];
+					int size = mInputStream.read(buffer);
+					if (size > 0){
+						ComBean ComRecData = new ComBean(sPort,buffer,size);
+						onDataReceived(ComRecData);
+					}
+					try
+					{
+						Thread.sleep(50);
+					} catch (InterruptedException e)
+					{
+						e.printStackTrace();
+					}
+				} catch (Throwable e)
+				{
+					e.printStackTrace();
+					return;
+				}
+			}
+		}
+	}
+	//----------------------------------------------------
+	private class SendThread extends Thread{
+		public boolean suspendFlag = true;
+		@Override
+		public void run() {
+			super.run();
+			while(!isInterrupted()) {
+				synchronized (this)
+				{
+					while (suspendFlag)
+					{
+						try
+						{
+							wait();
+						} catch (InterruptedException e)
+						{
+							e.printStackTrace();
+						}
+					}
+				}
+				send(getbLoopData(), 1);
+				try
+				{
+					Thread.sleep(iDelay);
+				} catch (InterruptedException e)
+				{
+					e.printStackTrace();
+				}
+			}
+		}
+
+		public void setSuspendFlag() {
+		this.suspendFlag = true;
+		}
+
+		public synchronized void setResume() {
+		this.suspendFlag = false;
+		notify();
+		}
+	}
+	//----------------------------------------------------
+	public int getBaudRate()
+	{
+		return iBaudRate;
+	}
+	public boolean setBaudRate(int iBaud)
+	{
+		if (_isOpen)
+		{
+			return false;
+		} else
+		{
+			iBaudRate = iBaud;
+			return true;
+		}
+	}
+	public boolean setBaudRate(String sBaud)
+	{
+		int iBaud = Integer.parseInt(sBaud);
+		return setBaudRate(iBaud);
+	}
+	//----------------------------------------------------
+	public String getPort()
+	{
+		return sPort;
+	}
+	public boolean setPort(String sPort)
+	{
+		if (_isOpen)
+		{
+			return false;
+		} else
+		{
+			this.sPort = sPort;
+			return true;
+		}
+	}
+	//----------------------------------------------------
+	public boolean isOpen()
+	{
+		return _isOpen;
+	}
+	//----------------------------------------------------
+	public byte[] getbLoopData()
+	{
+		return _bLoopData;
+	}
+	//----------------------------------------------------
+	public void setbLoopData(byte[] bLoopData)
+	{
+		this._bLoopData = bLoopData;
+	}
+	//----------------------------------------------------
+	public void setTxtLoopData(String sTxt){
+		this._bLoopData = sTxt.getBytes();
+	}
+	//----------------------------------------------------
+	public int getiDelay()
+	{
+		return iDelay;
+	}
+	//----------------------------------------------------
+	public void setiDelay(int iDelay)
+	{
+		this.iDelay = iDelay;
+	}
+	//----------------------------------------------------
+	public void startSend()
+	{
+		if (mSendThread != null)
+		{
+			mSendThread.setResume();
+		}
+	}
+	//----------------------------------------------------
+	public void stopSend()
+	{
+		if (mSendThread != null)
+		{
+			mSendThread.setSuspendFlag();
+		}
+	}
+	//----------------------------------------------------
+	protected abstract void onDataReceived(ComBean ComRecData);
+}

android/src/main/java/android_serialport_api/SerialPort.java

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+/*
+ * Copyright 2009 Cedric Priscal
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License. 
+ */
+
+package android_serialport_api;
+
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import android.util.Log;
+
+public class SerialPort {
+
+	private static final String TAG = "SerialPort";
+
+	/*
+	 * Do not remove or rename the field mFd: it is used by native method close();
+	 */
+	private final FileDescriptor mFd;
+	private final FileInputStream mFileInputStream;
+	private final FileOutputStream mFileOutputStream;
+
+	public SerialPort(File device, int baudrate, int flags) throws SecurityException, IOException {
+
+		/* Check access permission */
+		if (!device.canRead() || !device.canWrite()) {
+			try {
+				/* Missing read/write permission, trying to chmod the file */
+				Process su;
+				su = Runtime.getRuntime().exec("/system/bin/su");
+				String cmd = "chmod 666 " + device.getAbsolutePath() + "\n"
+						+ "exit\n";
+				su.getOutputStream().write(cmd.getBytes());
+				if ((su.waitFor() != 0) || !device.canRead()
+						|| !device.canWrite()) {
+					throw new SecurityException();
+				}
+			} catch (Exception e) {
+				e.printStackTrace();
+				throw new SecurityException();
+			}
+		}
+
+		mFd = open(device.getAbsolutePath(), baudrate, flags);
+		if (mFd == null) {
+			Log.e(TAG, "native open returns null");
+			throw new IOException();
+		}
+		mFileInputStream = new FileInputStream(mFd);
+		mFileOutputStream = new FileOutputStream(mFd);
+	}
+
+	// Getters and setters
+	public InputStream getInputStream() {
+		return mFileInputStream;
+	}
+
+	public OutputStream getOutputStream() {
+		return mFileOutputStream;
+	}
+
+	// JNI
+	private native static FileDescriptor open(String path, int baudrate, int flags);
+	public native void close();
+	static {
+		try {
+			System.loadLibrary("serial_port");
+		} catch (UnsatisfiedLinkError err) {
+			err.printStackTrace();
+		}
+	}
+}

android/src/main/java/android_serialport_api/SerialPortFinder.java

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+/*
+ * Copyright 2009 Cedric Priscal
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License. 
+ */
+
+package android_serialport_api;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.LineNumberReader;
+import java.util.Iterator;
+import java.util.Vector;
+
+import android.util.Log;
+
+public class SerialPortFinder {
+
+	public class Driver {
+		public Driver(String name, String root) {
+			mDriverName = name;
+			mDeviceRoot = root;
+		}
+		private final String mDriverName;
+		private final String mDeviceRoot;
+		Vector<File> mDevices = null;
+		public Vector<File> getDevices() {
+			if (mDevices == null) {
+				mDevices = new Vector<File>();
+				File dev = new File("/dev");
+				File[] files = dev.listFiles();
+				int i;
+				for (i=0; i<files.length; i++) {
+					if (files[i].getAbsolutePath().startsWith(mDeviceRoot)) {
+						Log.d(TAG, "Found new device: " + files[i]);
+						mDevices.add(files[i]);
+					}
+				}
+			}
+			return mDevices;
+		}
+		public String getName() {
+			return mDriverName;
+		}
+	}
+
+	private static final String TAG = "SerialPort";
+
+	private Vector<Driver> mDrivers = null;
+
+	Vector<Driver> getDrivers() throws IOException {
+		if (mDrivers == null) {
+			mDrivers = new Vector<Driver>();
+			LineNumberReader r = new LineNumberReader(new FileReader("/proc/tty/drivers"));
+			String l;
+			while((l = r.readLine()) != null) {
+				// Issue 3:
+				// Since driver name may contain spaces, we do not extract driver name with split()
+				String drivername = l.substring(0, 0x15).trim();
+				String[] w = l.split(" +");
+				if ((w.length >= 5) && (w[w.length-1].equals("serial"))) {
+					Log.d(TAG, "Found new driver " + drivername + " on " + w[w.length-4]);
+					mDrivers.add(new Driver(drivername, w[w.length-4]));
+				}
+			}
+			r.close();
+		}
+		return mDrivers;
+	}
+
+	public String[] getAllDevices() {
+		Vector<String> devices = new Vector<String>();
+		// Parse each driver
+		Iterator<Driver> itdriv;
+		try {
+			itdriv = getDrivers().iterator();
+			while(itdriv.hasNext()) {
+				Driver driver = itdriv.next();
+				Iterator<File> itdev = driver.getDevices().iterator();
+				while(itdev.hasNext()) {
+					String device = itdev.next().getName();
+					String value = String.format("%s (%s)", device, driver.getName());
+					devices.add(value);
+				}
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		return devices.toArray(new String[devices.size()]);
+	}
+
+	public String[] getAllDevicesPath() {
+		Vector<String> devices = new Vector<String>();
+		// Parse each driver
+		Iterator<Driver> itdriv;
+		try {
+			itdriv = getDrivers().iterator();
+			while(itdriv.hasNext()) {
+				Driver driver = itdriv.next();
+				Iterator<File> itdev = driver.getDevices().iterator();
+				while(itdev.hasNext()) {
+					String device = itdev.next().getAbsolutePath();
+					devices.add(device);
+				}
+			}
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		return devices.toArray(new String[devices.size()]);
+	}
+}

android/src/main/java/com/idworld/noemhost_and/IUsbConnState.java

@@ -0,0 +1,12 @@
+package com.idworld.noemhost_and;
+
+/**
+ * Created by KMS on 2016/8/23.
+ */
+public interface IUsbConnState {
+    void onUsbConnected();
+
+    void onUsbPermissionDenied();
+
+    void onDeviceNotFound();
+}

android/src/main/java/com/idworld/noemhost_and/UsbController.java

@@ -0,0 +1,440 @@
+package com.idworld.noemhost_and;
+
+import static android.app.PendingIntent.FLAG_IMMUTABLE;
+
+import android.app.Activity;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.hardware.usb.UsbConstants;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbDeviceConnection;
+import android.hardware.usb.UsbEndpoint;
+import android.hardware.usb.UsbInterface;
+import android.hardware.usb.UsbManager;
+import android.os.SystemClock;
+import android.util.Log;
+import android.widget.Toast;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Iterator;
+
+/**
+ * Created by KMS on 2016/8/23.
+ */
+public class UsbController {
+    private final Context mApplicationContext;
+    private final UsbManager mUsbManager;
+    private final int VID;
+    private final int PID;
+    private int m_nEPInSize, m_nEPOutSize;
+
+    private final byte[] m_abyTransferBuf;
+    private boolean m_bInit = false;
+    private UsbDeviceConnection m_usbConn = null;
+    private UsbInterface m_usbIf = null;
+    private UsbEndpoint m_epIN = null;
+    private UsbEndpoint m_epOUT = null;
+    private final IUsbConnState mConnectionHandler;
+
+    protected static final String ACTION_USB_PERMISSION = "ch.serverbox.android.USB";
+
+    /**
+     * Activity is needed for onResult
+     *
+     * @param parentActivity
+     */
+    public UsbController(Activity parentActivity, IUsbConnState connectionHandler, int vid, int pid){
+        mConnectionHandler = connectionHandler;
+        mApplicationContext = parentActivity.getApplicationContext();
+        mUsbManager = (UsbManager) mApplicationContext.getSystemService(Context.USB_SERVICE);
+        VID = vid;
+        PID = pid;
+        m_abyTransferBuf = new byte[512];
+        //init();
+    }
+
+    public void init(){
+        enumerate(new IPermissionListener() {
+            @Override
+            public void onPermissionDenied(UsbDevice d) {
+                UsbManager usbman = (UsbManager) mApplicationContext.getSystemService(Context.USB_SERVICE);
+                PendingIntent pi = PendingIntent.getBroadcast(mApplicationContext, 0, new Intent(ACTION_USB_PERMISSION), FLAG_IMMUTABLE);
+                mApplicationContext.registerReceiver(mPermissionReceiver, new IntentFilter(ACTION_USB_PERMISSION));
+                usbman.requestPermission(d, pi);
+            }
+        });
+    }
+
+    public void uninit(){
+        if (m_usbConn != null)
+        {
+            m_usbConn.releaseInterface(m_usbIf);
+            m_usbConn.close();
+            m_usbConn = null;
+            m_bInit = false;
+        }
+
+        //stop();
+    }
+
+    public void stop()
+    {
+        try{
+            mApplicationContext.unregisterReceiver(mPermissionReceiver);
+        }catch(IllegalArgumentException e){}//bravo
+    }
+
+    public boolean IsInit(){
+        return m_bInit;
+    }
+
+    private void enumerate(IPermissionListener listener) {
+        boolean bFound = false;
+        l("enumerating");
+        HashMap<String, UsbDevice> devlist = mUsbManager.getDeviceList();
+        Iterator<UsbDevice> deviter = devlist.values().iterator();
+
+        while (deviter.hasNext()) {
+            UsbDevice d = deviter.next();
+            l("Found device: " + String.format("%04X:%04X", d.getVendorId(), d.getProductId()));
+
+            Toast.makeText(mApplicationContext, "Found device: " + String.format("%04X:%04X", d.getVendorId(), d.getProductId()), Toast.LENGTH_SHORT).show();
+
+            if (d.getVendorId() == VID && d.getProductId() == PID) {
+                bFound = true;
+                l("Device under: " + d.getDeviceName());
+                if (!mUsbManager.hasPermission(d))
+                {
+                    Toast.makeText(mApplicationContext, "enumerate, hasPermission return false" , Toast.LENGTH_SHORT).show();
+                    listener.onPermissionDenied(d);
+                }
+                else{
+                    Toast.makeText(mApplicationContext, "enumerate, GetConnInerface start" , Toast.LENGTH_SHORT).show();
+                    //startHandler(d);
+                    GetConnInerface(d);
+                    //TestComm(d);
+                    return;
+                }
+                break;
+            }
+        }
+        if (!bFound)
+        {
+            Toast.makeText(mApplicationContext, "no more devices found" , Toast.LENGTH_SHORT).show();
+            mConnectionHandler.onDeviceNotFound();
+        }
+    }
+
+    private class PermissionReceiver extends BroadcastReceiver {
+        private final IPermissionListener mPermissionListener;
+
+        public PermissionReceiver(IPermissionListener permissionListener) {
+            mPermissionListener = permissionListener;
+        }
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            mApplicationContext.unregisterReceiver(this);
+            if (intent.getAction().equals(ACTION_USB_PERMISSION)) {
+                if (!intent.getBooleanExtra(
+                        UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
+                    mPermissionListener.onPermissionDenied(intent
+                            .getParcelableExtra(UsbManager.EXTRA_DEVICE));
+
+                    mConnectionHandler.onUsbPermissionDenied();
+                } else {
+                    l("Permission granted");
+                    UsbDevice dev = intent
+                            .getParcelableExtra(UsbManager.EXTRA_DEVICE);
+                    if (dev != null) {
+                        if (dev.getVendorId() == VID
+                                && dev.getProductId() == PID) {
+                            //startHandler(dev);// has new thread
+                            GetConnInerface(dev);
+                            //TestComm(dev);
+                        }
+                    } else {
+                        mConnectionHandler.onDeviceNotFound();
+                    }
+                }
+            }
+        }
+    }
+
+    private void GetConnInerface(UsbDevice dev){
+        int n;
+
+        m_usbConn = mUsbManager.openDevice(dev);
+
+        n = dev.getInterfaceCount();
+
+        if (n <= 0)
+            return;
+
+        if (!m_usbConn.claimInterface(dev.getInterface(0), true)) {
+            return;
+        }
+
+        m_usbIf = dev.getInterface(0);
+
+        n = m_usbIf.getEndpointCount();
+
+        if (n < 2)
+            return;
+
+        for (int i = 0; i < n; i++) {
+            if (m_usbIf.getEndpoint(i).getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) {
+                if (m_usbIf.getEndpoint(i).getDirection() == UsbConstants.USB_DIR_IN)
+                    m_epIN = m_usbIf.getEndpoint(i);
+                else
+                    m_epOUT = m_usbIf.getEndpoint(i);
+            }
+        }
+
+        m_nEPInSize = m_epIN.getMaxPacketSize();
+        m_nEPOutSize = m_epOUT.getMaxPacketSize();
+
+        m_bInit = true;
+
+        //m_epOUT.getMaxPacketSize();
+
+        //Toast.makeText(mApplicationContext, "GetConnInerface OK, Out Max Size="+m_nEPOutSize+" In Max Size=" + m_nEPInSize, Toast.LENGTH_SHORT).show();
+        mConnectionHandler.onUsbConnected();
+    }
+
+    public boolean OperationInternal(byte[] pData, int nDataLen, int nTimeOut, boolean bRead)
+    {
+        byte[] w_abyTmp = new byte[31];
+        byte[] w_abyCSW = new byte[13];
+        boolean w_bRet;
+
+        Arrays.fill(w_abyTmp, (byte)0);
+        w_abyTmp[0] = 0x55;
+        w_abyTmp[1] = 0x53;
+        w_abyTmp[2] = 0x42;
+        w_abyTmp[3] = 0x43;
+        w_abyTmp[4] = 0x28;
+        w_abyTmp[5] = 0x2b;
+        w_abyTmp[6] = 0x18;
+        w_abyTmp[7] = (byte)0x89;
+        w_abyTmp[8] = (byte)(nDataLen & 0xFF);
+        w_abyTmp[9] = (byte)((nDataLen >> 8)& 0xFF);
+        w_abyTmp[10] = (byte)((nDataLen >> 16)& 0xFF);
+        w_abyTmp[11] = (byte)((nDataLen >> 24)& 0xFF);
+
+        if(bRead)
+            w_abyTmp[12] = (byte)0x80;
+        else
+            w_abyTmp[12] = 0x00;    //cCBWFlags
+
+        w_abyTmp[13] = 0x00;    //cCBWlun
+        w_abyTmp[14] = 0x0a;    //cCBWCBLength
+
+        w_abyTmp[15] = (byte)0xef;
+        if (bRead)
+            w_abyTmp[16] = (byte)0xff;
+        else
+            w_abyTmp[16] = (byte)0xfe;
+
+        // send 31bytes
+        w_bRet = UsbBulkSend(w_abyTmp, 31, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        // read or write real data
+        if (bRead)
+            w_bRet = UsbBulkReceive(pData, nDataLen, nTimeOut);
+        else
+            w_bRet = UsbBulkSend(pData, nDataLen, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        // receive csw
+        w_bRet = UsbBulkReceive(w_abyCSW, 13, nTimeOut);
+
+        return w_bRet;
+    }
+
+    public boolean UsbSCSIWrite(byte[] pCDB, int nCDBLen, byte[] pData, int nDataLen, int nTimeOut)
+    {
+        byte[] w_abyTmp = new byte[31];
+        byte[] w_abyCSW = new byte[13];
+        boolean w_bRet;
+
+        //Arrays.fill(w_abyTmp, (byte)0);
+        w_abyTmp[0] = 0x55;
+        w_abyTmp[1] = 0x53;
+        w_abyTmp[2] = 0x42;
+        w_abyTmp[3] = 0x43;
+        w_abyTmp[4] = 0x28;
+        w_abyTmp[5] = 0x2b;
+        w_abyTmp[6] = 0x18;
+        w_abyTmp[7] = (byte)0x89;
+        w_abyTmp[8] = 0x00;
+        w_abyTmp[9] = 0x00;
+        w_abyTmp[10] = 0x00;
+        w_abyTmp[11] = 0x00;
+        w_abyTmp[12] = 0x00;    //cCBWFlags
+        w_abyTmp[13] = 0x00;    //cCBWlun
+        w_abyTmp[14] = 0x0a;    //cCBWCBLength
+
+        System.arraycopy(pCDB, 0, w_abyTmp, 15, nCDBLen);
+        //System.arraycopy(pData, 0, w_abyTmp, 31, nDataLen);
+
+        w_bRet = UsbBulkSend(w_abyTmp, 31, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        w_bRet = UsbBulkSend(pData, nDataLen, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        // receive csw
+        w_bRet = UsbBulkReceive(w_abyCSW, 13, nTimeOut);
+
+        return w_bRet;
+    }
+
+    public boolean UsbSCSIRead(byte[] pCDB, int nCDBLen, byte[] pData, int nDataLen, int nTimeOut)
+    {
+        long    w_nTime;
+        byte[] w_abyTmp = new byte[31];
+        byte[] w_abyCSW = new byte[13];
+        boolean w_bRet;
+
+        //Arrays.fill(w_abyTmp, (byte)0);
+        w_abyTmp[0] = 0x55;
+        w_abyTmp[1] = 0x53;
+        w_abyTmp[2] = 0x42;
+        w_abyTmp[3] = 0x43;
+        w_abyTmp[4] = 0x28;
+        w_abyTmp[5] = 0x2b;
+        w_abyTmp[6] = 0x18;
+        w_abyTmp[7] = (byte)0x89;
+        w_abyTmp[8] = 0x00;
+        w_abyTmp[9] = 0x00;
+        w_abyTmp[10] = 0x00;
+        w_abyTmp[11] = 0x00;
+        w_abyTmp[12] = (byte)0x80;    //cCBWFlags
+        w_abyTmp[13] = 0x00;    //cCBWlun
+        w_abyTmp[14] = 0x0a;    //cCBWCBLength
+
+        System.arraycopy(pCDB, 0, w_abyTmp, 15, nCDBLen);
+
+        w_bRet = UsbBulkSend(w_abyTmp, 31, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        w_nTime = SystemClock.elapsedRealtime();
+
+        w_bRet = UsbBulkReceive(pData, nDataLen, nTimeOut);
+
+        w_nTime = SystemClock.elapsedRealtime() - w_nTime;
+
+        //Toast.makeText(mApplicationContext, "UsbSCSIRead, UsbBulkReceive Time : " + w_nTime , Toast.LENGTH_SHORT).show();
+
+        if (!w_bRet)
+            return false;
+
+        // receive csw
+        w_bRet = UsbBulkReceive(w_abyCSW, 13, nTimeOut);
+
+        return w_bRet;
+    }
+
+    private boolean UsbBulkSend(byte[] pBuf, int nLen, int nTimeOut)
+    {
+        int i, n, r, w_nRet;
+        //byte[] w_abyTmp = new byte[m_nEPOutSize];
+
+        n = nLen / m_nEPOutSize;
+        r = nLen % m_nEPOutSize;
+
+        for(i=0; i<n; i++)
+        {
+            System.arraycopy(pBuf, i*m_nEPOutSize, m_abyTransferBuf, 0, m_nEPOutSize);
+
+            w_nRet = m_usbConn.bulkTransfer(m_epOUT, m_abyTransferBuf, m_nEPOutSize, nTimeOut);
+
+            if (w_nRet != m_nEPOutSize)
+                return false;
+        }
+
+        if (r > 0)
+        {
+            System.arraycopy(pBuf, i*m_nEPOutSize, m_abyTransferBuf, 0, r);
+
+            w_nRet = m_usbConn.bulkTransfer(m_epOUT, m_abyTransferBuf, r, nTimeOut);
+
+            return w_nRet == r;
+        }
+
+        return true;
+    }
+
+    private boolean UsbBulkReceive(byte[] pBuf, int nLen, int nTimeOut)
+    {
+        int i, n, r, w_nRet;
+        //byte[] w_abyTmp = new byte[m_nEPInSize];
+
+        //w_nRet = m_usbConn.bulkTransfer(m_epIN, pBuf, nLen, nTimeOut);
+
+        //if (w_nRet != nLen)
+        //    return false;
+
+        n = nLen / m_nEPInSize;
+        r = nLen % m_nEPInSize;
+
+        //Toast.makeText(mApplicationContext, "UsbBulkReceive, Buf Len = " + pBuf.length, Toast.LENGTH_SHORT).show();
+
+        for(i=0; i<n; i++)
+        {
+            w_nRet = m_usbConn.bulkTransfer(m_epIN, m_abyTransferBuf, m_nEPInSize, nTimeOut);
+
+            if (w_nRet != m_nEPInSize)
+                return false;
+
+            System.arraycopy(m_abyTransferBuf, 0, pBuf, i*m_nEPInSize, m_nEPInSize);
+        }
+
+        if (r > 0)
+        {
+            w_nRet = m_usbConn.bulkTransfer(m_epIN, m_abyTransferBuf, r, nTimeOut);
+
+            if (w_nRet != r)
+                return false;
+
+            System.arraycopy(m_abyTransferBuf, 0, pBuf, i*m_nEPInSize, r);
+        }
+
+        return true;
+    }
+
+    // END MAIN LOOP
+    private final BroadcastReceiver mPermissionReceiver = new PermissionReceiver(
+            new IPermissionListener() {
+                @Override
+                public void onPermissionDenied(UsbDevice d) {
+                    l("Permission denied on " + d.getDeviceId());
+                }
+            });
+
+    private interface IPermissionListener {
+        void onPermissionDenied(UsbDevice d);
+    }
+
+    public final static String TAG = "USBController";
+
+    private void l(Object msg) {
+        Log.d(TAG, ">==< " + msg.toString() + " >==<");
+    }
+}

android/src/main/java/com/xiarui/zhiwen/IUsbConnState.java

@@ -0,0 +1,12 @@
+package com.xiarui.zhiwen;
+
+/**
+ * Created by KMS on 2016/8/23.
+ */
+public interface IUsbConnState {
+    void onUsbConnected();
+
+    void onUsbPermissionDenied();
+
+    void onDeviceNotFound();
+}

android/src/main/java/com/xiarui/zhiwen/UsbController.java

@@ -0,0 +1,440 @@
+package com.xiarui.zhiwen;
+
+import static android.app.PendingIntent.FLAG_IMMUTABLE;
+
+import android.app.Activity;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.hardware.usb.UsbConstants;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbDeviceConnection;
+import android.hardware.usb.UsbEndpoint;
+import android.hardware.usb.UsbInterface;
+import android.hardware.usb.UsbManager;
+import android.os.SystemClock;
+import android.util.Log;
+import android.widget.Toast;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Iterator;
+
+/**
+ * Created by KMS on 2016/8/23.
+ */
+public class UsbController {
+    private final Context mApplicationContext;
+    private final UsbManager mUsbManager;
+    private final int VID;
+    private final int PID;
+    private int m_nEPInSize, m_nEPOutSize;
+
+    private final byte[] m_abyTransferBuf;
+    private boolean m_bInit = false;
+    private UsbDeviceConnection m_usbConn = null;
+    private UsbInterface m_usbIf = null;
+    private UsbEndpoint m_epIN = null;
+    private UsbEndpoint m_epOUT = null;
+    private final IUsbConnState mConnectionHandler;
+
+    protected static final String ACTION_USB_PERMISSION = "ch.serverbox.android.USB";
+
+    /**
+     * Activity is needed for onResult
+     *
+     * @param parentActivity
+     */
+    public UsbController(Activity parentActivity, IUsbConnState connectionHandler, int vid, int pid){
+        mConnectionHandler = connectionHandler;
+        mApplicationContext = parentActivity.getApplicationContext();
+        mUsbManager = (UsbManager) mApplicationContext.getSystemService(Context.USB_SERVICE);
+        VID = vid;
+        PID = pid;
+        m_abyTransferBuf = new byte[512];
+        //init();
+    }
+
+    public void init(){
+        enumerate(new IPermissionListener() {
+            @Override
+            public void onPermissionDenied(UsbDevice d) {
+                UsbManager usbman = (UsbManager) mApplicationContext.getSystemService(Context.USB_SERVICE);
+                PendingIntent pi = PendingIntent.getBroadcast(mApplicationContext, 0, new Intent(ACTION_USB_PERMISSION), FLAG_IMMUTABLE);
+                mApplicationContext.registerReceiver(mPermissionReceiver, new IntentFilter(ACTION_USB_PERMISSION));
+                usbman.requestPermission(d, pi);
+            }
+        });
+    }
+
+    public void uninit(){
+        if (m_usbConn != null)
+        {
+            m_usbConn.releaseInterface(m_usbIf);
+            m_usbConn.close();
+            m_usbConn = null;
+            m_bInit = false;
+        }
+
+        //stop();
+    }
+
+    public void stop()
+    {
+        try{
+            mApplicationContext.unregisterReceiver(mPermissionReceiver);
+        }catch(IllegalArgumentException e){}//bravo
+    }
+
+    public boolean IsInit(){
+        return m_bInit;
+    }
+
+    private void enumerate(IPermissionListener listener) {
+        boolean bFound = false;
+        l("enumerating");
+        HashMap<String, UsbDevice> devlist = mUsbManager.getDeviceList();
+        Iterator<UsbDevice> deviter = devlist.values().iterator();
+
+        while (deviter.hasNext()) {
+            UsbDevice d = deviter.next();
+            l("Found device: " + String.format("%04X:%04X", d.getVendorId(), d.getProductId()));
+
+//            Toast.makeText(mApplicationContext, "Found device: " + String.format("%04X:%04X", d.getVendorId(), d.getProductId()), Toast.LENGTH_SHORT).show();
+
+            if (d.getVendorId() == VID && d.getProductId() == PID) {
+                bFound = true;
+                l("Device under: " + d.getDeviceName());
+                if (!mUsbManager.hasPermission(d))
+                {
+                    Toast.makeText(mApplicationContext, "enumerate, hasPermission return false" , Toast.LENGTH_SHORT).show();
+                    listener.onPermissionDenied(d);
+                }
+                else{
+//                    Toast.makeText(mApplicationContext, "enumerate, GetConnInerface start" , Toast.LENGTH_SHORT).show();
+                    //startHandler(d);
+                    GetConnInerface(d);
+                    //TestComm(d);
+                    return;
+                }
+                break;
+            }
+        }
+        if (!bFound)
+        {
+            Toast.makeText(mApplicationContext, "no more devices found" , Toast.LENGTH_SHORT).show();
+            mConnectionHandler.onDeviceNotFound();
+        }
+    }
+
+    private class PermissionReceiver extends BroadcastReceiver {
+        private final IPermissionListener mPermissionListener;
+
+        public PermissionReceiver(IPermissionListener permissionListener) {
+            mPermissionListener = permissionListener;
+        }
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            mApplicationContext.unregisterReceiver(this);
+            if (intent.getAction().equals(ACTION_USB_PERMISSION)) {
+                if (!intent.getBooleanExtra(
+                        UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
+                    mPermissionListener.onPermissionDenied(intent
+                            .getParcelableExtra(UsbManager.EXTRA_DEVICE));
+
+                    mConnectionHandler.onUsbPermissionDenied();
+                } else {
+                    l("Permission granted");
+                    UsbDevice dev = intent
+                            .getParcelableExtra(UsbManager.EXTRA_DEVICE);
+                    if (dev != null) {
+                        if (dev.getVendorId() == VID
+                                && dev.getProductId() == PID) {
+                            //startHandler(dev);// has new thread
+                            GetConnInerface(dev);
+                            //TestComm(dev);
+                        }
+                    } else {
+                        mConnectionHandler.onDeviceNotFound();
+                    }
+                }
+            }
+        }
+    }
+
+    private void GetConnInerface(UsbDevice dev){
+        int n;
+
+        m_usbConn = mUsbManager.openDevice(dev);
+
+        n = dev.getInterfaceCount();
+
+        if (n <= 0)
+            return;
+
+        if (!m_usbConn.claimInterface(dev.getInterface(0), true)) {
+            return;
+        }
+
+        m_usbIf = dev.getInterface(0);
+
+        n = m_usbIf.getEndpointCount();
+
+        if (n < 2)
+            return;
+
+        for (int i = 0; i < n; i++) {
+            if (m_usbIf.getEndpoint(i).getType() == UsbConstants.USB_ENDPOINT_XFER_BULK) {
+                if (m_usbIf.getEndpoint(i).getDirection() == UsbConstants.USB_DIR_IN)
+                    m_epIN = m_usbIf.getEndpoint(i);
+                else
+                    m_epOUT = m_usbIf.getEndpoint(i);
+            }
+        }
+
+        m_nEPInSize = m_epIN.getMaxPacketSize();
+        m_nEPOutSize = m_epOUT.getMaxPacketSize();
+
+        m_bInit = true;
+
+        //m_epOUT.getMaxPacketSize();
+
+        //Toast.makeText(mApplicationContext, "GetConnInerface OK, Out Max Size="+m_nEPOutSize+" In Max Size=" + m_nEPInSize, Toast.LENGTH_SHORT).show();
+        mConnectionHandler.onUsbConnected();
+    }
+
+    public boolean OperationInternal(byte[] pData, int nDataLen, int nTimeOut, boolean bRead)
+    {
+        byte[] w_abyTmp = new byte[31];
+        byte[] w_abyCSW = new byte[13];
+        boolean w_bRet;
+
+        Arrays.fill(w_abyTmp, (byte)0);
+        w_abyTmp[0] = 0x55;
+        w_abyTmp[1] = 0x53;
+        w_abyTmp[2] = 0x42;
+        w_abyTmp[3] = 0x43;
+        w_abyTmp[4] = 0x28;
+        w_abyTmp[5] = 0x2b;
+        w_abyTmp[6] = 0x18;
+        w_abyTmp[7] = (byte)0x89;
+        w_abyTmp[8] = (byte)(nDataLen & 0xFF);
+        w_abyTmp[9] = (byte)((nDataLen >> 8)& 0xFF);
+        w_abyTmp[10] = (byte)((nDataLen >> 16)& 0xFF);
+        w_abyTmp[11] = (byte)((nDataLen >> 24)& 0xFF);
+
+        if(bRead)
+            w_abyTmp[12] = (byte)0x80;
+        else
+            w_abyTmp[12] = 0x00;    //cCBWFlags
+
+        w_abyTmp[13] = 0x00;    //cCBWlun
+        w_abyTmp[14] = 0x0a;    //cCBWCBLength
+
+        w_abyTmp[15] = (byte)0xef;
+        if (bRead)
+            w_abyTmp[16] = (byte)0xff;
+        else
+            w_abyTmp[16] = (byte)0xfe;
+
+        // send 31bytes
+        w_bRet = UsbBulkSend(w_abyTmp, 31, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        // read or write real data
+        if (bRead)
+            w_bRet = UsbBulkReceive(pData, nDataLen, nTimeOut);
+        else
+            w_bRet = UsbBulkSend(pData, nDataLen, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        // receive csw
+        w_bRet = UsbBulkReceive(w_abyCSW, 13, nTimeOut);
+
+        return w_bRet;
+    }
+
+    public boolean UsbSCSIWrite(byte[] pCDB, int nCDBLen, byte[] pData, int nDataLen, int nTimeOut)
+    {
+        byte[] w_abyTmp = new byte[31];
+        byte[] w_abyCSW = new byte[13];
+        boolean w_bRet;
+
+        //Arrays.fill(w_abyTmp, (byte)0);
+        w_abyTmp[0] = 0x55;
+        w_abyTmp[1] = 0x53;
+        w_abyTmp[2] = 0x42;
+        w_abyTmp[3] = 0x43;
+        w_abyTmp[4] = 0x28;
+        w_abyTmp[5] = 0x2b;
+        w_abyTmp[6] = 0x18;
+        w_abyTmp[7] = (byte)0x89;
+        w_abyTmp[8] = 0x00;
+        w_abyTmp[9] = 0x00;
+        w_abyTmp[10] = 0x00;
+        w_abyTmp[11] = 0x00;
+        w_abyTmp[12] = 0x00;    //cCBWFlags
+        w_abyTmp[13] = 0x00;    //cCBWlun
+        w_abyTmp[14] = 0x0a;    //cCBWCBLength
+
+        System.arraycopy(pCDB, 0, w_abyTmp, 15, nCDBLen);
+        //System.arraycopy(pData, 0, w_abyTmp, 31, nDataLen);
+
+        w_bRet = UsbBulkSend(w_abyTmp, 31, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        w_bRet = UsbBulkSend(pData, nDataLen, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        // receive csw
+        w_bRet = UsbBulkReceive(w_abyCSW, 13, nTimeOut);
+
+        return w_bRet;
+    }
+
+    public boolean UsbSCSIRead(byte[] pCDB, int nCDBLen, byte[] pData, int nDataLen, int nTimeOut)
+    {
+        long    w_nTime;
+        byte[] w_abyTmp = new byte[31];
+        byte[] w_abyCSW = new byte[13];
+        boolean w_bRet;
+
+        //Arrays.fill(w_abyTmp, (byte)0);
+        w_abyTmp[0] = 0x55;
+        w_abyTmp[1] = 0x53;
+        w_abyTmp[2] = 0x42;
+        w_abyTmp[3] = 0x43;
+        w_abyTmp[4] = 0x28;
+        w_abyTmp[5] = 0x2b;
+        w_abyTmp[6] = 0x18;
+        w_abyTmp[7] = (byte)0x89;
+        w_abyTmp[8] = 0x00;
+        w_abyTmp[9] = 0x00;
+        w_abyTmp[10] = 0x00;
+        w_abyTmp[11] = 0x00;
+        w_abyTmp[12] = (byte)0x80;    //cCBWFlags
+        w_abyTmp[13] = 0x00;    //cCBWlun
+        w_abyTmp[14] = 0x0a;    //cCBWCBLength
+
+        System.arraycopy(pCDB, 0, w_abyTmp, 15, nCDBLen);
+
+        w_bRet = UsbBulkSend(w_abyTmp, 31, nTimeOut);
+
+        if (!w_bRet)
+            return false;
+
+        w_nTime = SystemClock.elapsedRealtime();
+
+        w_bRet = UsbBulkReceive(pData, nDataLen, nTimeOut);
+
+        w_nTime = SystemClock.elapsedRealtime() - w_nTime;
+
+        //Toast.makeText(mApplicationContext, "UsbSCSIRead, UsbBulkReceive Time : " + w_nTime , Toast.LENGTH_SHORT).show();
+
+        if (!w_bRet)
+            return false;
+
+        // receive csw
+        w_bRet = UsbBulkReceive(w_abyCSW, 13, nTimeOut);
+
+        return w_bRet;
+    }
+
+    private boolean UsbBulkSend(byte[] pBuf, int nLen, int nTimeOut)
+    {
+        int i, n, r, w_nRet;
+        //byte[] w_abyTmp = new byte[m_nEPOutSize];
+
+        n = nLen / m_nEPOutSize;
+        r = nLen % m_nEPOutSize;
+
+        for(i=0; i<n; i++)
+        {
+            System.arraycopy(pBuf, i*m_nEPOutSize, m_abyTransferBuf, 0, m_nEPOutSize);
+
+            w_nRet = m_usbConn.bulkTransfer(m_epOUT, m_abyTransferBuf, m_nEPOutSize, nTimeOut);
+
+            if (w_nRet != m_nEPOutSize)
+                return false;
+        }
+
+        if (r > 0)
+        {
+            System.arraycopy(pBuf, i*m_nEPOutSize, m_abyTransferBuf, 0, r);
+
+            w_nRet = m_usbConn.bulkTransfer(m_epOUT, m_abyTransferBuf, r, nTimeOut);
+
+            return w_nRet == r;
+        }
+
+        return true;
+    }
+
+    private boolean UsbBulkReceive(byte[] pBuf, int nLen, int nTimeOut)
+    {
+        int i, n, r, w_nRet;
+        //byte[] w_abyTmp = new byte[m_nEPInSize];
+
+        //w_nRet = m_usbConn.bulkTransfer(m_epIN, pBuf, nLen, nTimeOut);
+
+        //if (w_nRet != nLen)
+        //    return false;
+
+        n = nLen / m_nEPInSize;
+        r = nLen % m_nEPInSize;
+
+        //Toast.makeText(mApplicationContext, "UsbBulkReceive, Buf Len = " + pBuf.length, Toast.LENGTH_SHORT).show();
+
+        for(i=0; i<n; i++)
+        {
+            w_nRet = m_usbConn.bulkTransfer(m_epIN, m_abyTransferBuf, m_nEPInSize, nTimeOut);
+
+            if (w_nRet != m_nEPInSize)
+                return false;
+
+            System.arraycopy(m_abyTransferBuf, 0, pBuf, i*m_nEPInSize, m_nEPInSize);
+        }
+
+        if (r > 0)
+        {
+            w_nRet = m_usbConn.bulkTransfer(m_epIN, m_abyTransferBuf, r, nTimeOut);
+
+            if (w_nRet != r)
+                return false;
+
+            System.arraycopy(m_abyTransferBuf, 0, pBuf, i*m_nEPInSize, r);
+        }
+
+        return true;
+    }
+
+    // END MAIN LOOP
+    private final BroadcastReceiver mPermissionReceiver = new PermissionReceiver(
+            new IPermissionListener() {
+                @Override
+                public void onPermissionDenied(UsbDevice d) {
+                    l("Permission denied on " + d.getDeviceId());
+                }
+            });
+
+    private interface IPermissionListener {
+        void onPermissionDenied(UsbDevice d);
+    }
+
+    public final static String TAG = "USBController";
+
+    private void l(Object msg) {
+        Log.d(TAG, ">==< " + msg.toString() + " >==<");
+    }
+}

android/src/main/res/xml/device_filter.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<resource>
+   <usb-device product-id="29987" vendor-id="6790" />
+   <usb-device product-id="21795" vendor-id="6790" />
+   <usb-device product-id="30264" vendor-id="8201" />
+</resource>

android/src/test/java/com/xiarui/zhiwen/ZhiwenPluginTest.java

@@ -0,0 +1,29 @@
+package com.xiarui.zhiwen;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+import io.flutter.plugin.common.MethodCall;
+import io.flutter.plugin.common.MethodChannel;
+import org.junit.Test;
+
+/**
+ * This demonstrates a simple unit test of the Java portion of this plugin's implementation.
+ *
+ * Once you have built the plugin's example app, you can run these tests from the command
+ * line by running `./gradlew testDebugUnitTest` in the `example/android/` directory, or
+ * you can run them directly from IDEs that support JUnit such as Android Studio.
+ */
+
+public class ZhiwenPluginTest {
+  @Test
+  public void onMethodCall_getPlatformVersion_returnsExpectedValue() {
+    ZhiwenPlugin plugin = new ZhiwenPlugin();
+
+    final MethodCall call = new MethodCall("getPlatformVersion", null);
+    MethodChannel.Result mockResult = mock(MethodChannel.Result.class);
+    plugin.onMethodCall(call, mockResult);
+
+    verify(mockResult).success("Android " + android.os.Build.VERSION.RELEASE);
+  }
+}