屏幕旋转状态

介绍

因为某些原因，需要显示器上监听安卓开发板的屏幕状态，网上找了些资料说是可以通过adb命令去实现
可以参考资料：http://www.jianshu.com/p/fee5b31774be
这篇文章实现方法应该不是通用的，我们在手机和安卓开发板上各自都进行了尝试，结果显示并不通用。
我们使用在pc端连接wifi天线开设个固定的ip：见上篇博客；

pc端做服务端（c语言），安卓端做客户端（java），使用socket通信，进行数据传递。

scoket通信

我们没有对数据格式进行严格的定义，只是进行了通信，下面我就附上自己写的粗劣代码，在main中开启服务同时结束这个界面，主题配置 android:theme=”@android:style/Theme.NoDisplay”>

public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Intent intent=new Intent(MainActivity.this, ConfigService.class);        startService(intent);        finish();    }}

在服务中监听开发板的屏幕状态变化，并且将变化通过socket通信传递给服务端，接受服务端的确认信息。

public class ConfigService extends Service {    private byte[] mBytes;    private byte[] mMtes;    private Socket mSocket;    boolean iSconnect;    @Nullable    @Override    public IBinder onBind(Intent intent) {        return null;    }    @Override    public void onCreate() {        super.onCreate();        LogUtils.wyjlog("打开服务");        initData();//初始化数据        initNertWork();    }    private void initNertWork() {        new Thread(new Runnable() {            @Override            public void run() {                initSocket();            }        }).start();    }    private void initData() {    /*      unsigned int magic; //魔数  0x20170707          unsigned int id; //命令类型  0x00000001          unsigned int len; //数据长度,包括头 16          int cmdFlag; //0 代表横屏， 1代表竖屏*/        byte[]aData = new byte[4];        byte[]bData = new byte[4];        byte[]cData = new byte[4];        byte[]dData = new byte[4];        byte[]fData = new byte[4];        int[]  mPortraitData = new int[]{538380039,1,16,1};        aData = DataChange.intToBytes(mPortraitData[0]);        bData = DataChange.intToBytes(mPortraitData[1]);        cData = DataChange.intToBytes(mPortraitData[2]);        dData = DataChange.intToBytes(mPortraitData[3]);        fData=DataChange.intToBytes(0);        mBytes = new byte[16];        mMtes = new byte[16];        for (int i = 0; i < mBytes.length; i++) {            if (i < 4) {//0-3                mBytes[i] = aData[i];                mMtes[i] = aData[i];            } else if (i<8) {//4-7                mBytes[i] = bData[i-4];                mMtes[i] = bData[i-4];            } else if (i < 12) {//8-11                mBytes[i] = cData[i-8];                mMtes[i] = cData[i-8];            } else {//12-15                mBytes[i] = dData[i-12];//1                mMtes[i] = fData[i-12];//0            }            LogUtils.wyjlog("====="+i+" :"+ mBytes[i]);        }    }    @Override    public void onConfigurationChanged(Configuration newConfig) {        super.onConfigurationChanged(newConfig);        //在横竖屏转换前确保socket连接        //切换为竖屏        if (newConfig.orientation == this.getResources().getConfiguration().ORIENTATION_PORTRAIT) {            final String Tag="1";//竖屏            new Thread(new Runnable() {                @Override                public void run() {                    while(!iSconnect) {                       initSocket();                    }                    SendMessage(Tag);                }            }).start();            Toast.makeText(getApplicationContext(), "切换为竖屏", Toast.LENGTH_SHORT).show();        }        //切换为横屏        else if (newConfig.orientation == this.getResources().getConfiguration().ORIENTATION_LANDSCAPE) {            final String Tag="0";//横屏            new Thread(new Runnable() {                @Override                public void run() {                    while(!iSconnect) {                        initSocket();                    }                    SendMessage(Tag);                }            }).start();            Toast.makeText(getApplicationContext(), "切换为横屏", Toast.LENGTH_SHORT).show();        }    }    private void initSocket() {        try {            mSocket = new Socket("192.168.137.1", 8000);            iSconnect=true;            LogUtils.wyjlog("socket连接成功");        } catch (IOException e) {            e.printStackTrace();            iSconnect=false;            LogUtils.wyjlog("连接失败"+e.getLocalizedMessage()+e.getMessage());            try {                Thread.sleep(1000);            } catch (InterruptedException e1) {                e1.printStackTrace();            }        }    }    private void SendMessage(String s) {        try {            DataOutputStream dos = new DataOutputStream(mSocket.getOutputStream());            DataInputStream in = new DataInputStream(mSocket.getInputStream());            byte[] temp = new byte[16];            if (s.equals("0")) { //7 7 23 32  // 1 0 0 0   // 16 0 0 0   // 1 0 0 0                Task(dos, in, temp,"横屏",s);            } else {//竖屏                Task(dos, in, temp,"竖屏",s);            }        } catch (IOException e) {            e.printStackTrace();            LogUtils.wyjlog("====="+e.getMessage()+e.getLocalizedMessage());        }    }    private void Task(DataOutputStream dos, DataInputStream in, byte[] temp, String type, String sType) throws IOException {        while (true) {            LogUtils.wyjlog(type);            if (sType.equals("0")) {                dos.write(mMtes,0,mMtes.length);//横屏            } else {                dos.write(mBytes,0,mBytes.length);//竖屏            }            dos.flush();            in.read(temp);            String s1 = new String(temp);  //   32 23 7 7 0004  00016 0000            for (int i = 0; i < temp.length; i++) {                LogUtils.wyjlog(type+"第"+i+"位"+temp[i]); }            if (temp[11] == 16 && temp[7] == 4) {//回复确认                LogUtils.wyjlog("确认回复数据  ："+type);                ////TODO:要不要关闭输入输出流？ in.close() dos.close();                break;            }            LogUtils.wyjlog("数据发送失败");        }    }    }

此处要注意socket通信在in.read(temp)是一个阻塞线程，在数据读取前要先dos.flush();刷新输出流。接受的数据由于是写C定义的，按照那边的要求进行高位在前。

public class DataChange {    public static byte[] intToBytes(int value)    {        byte[] byte_src = new byte[4];        byte_src[3] = (byte) ((value & 0xFF000000)>>24);        byte_src[2] = (byte) ((value & 0x00FF0000)>>16);        byte_src[1] = (byte) ((value & 0x0000FF00)>>8);        byte_src[0] = (byte) ((value & 0x000000FF));        return byte_src;    }}