HDMI(二)：LVDS、HDMI双屏异显

 

一、隐藏上方TitleBar
在AndroidManifest.xml的配置文件里面的<activity>标签添加属性：

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android:theme="@android:style/Theme.NoTitleBar.Fullscreen"

 示例：

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<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.NoTitleBar.Fullscreen"  >
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
 
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

二、daemon,副屏显示图片

2.1、权限

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<!-- 读写存储卡权限的问题 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<!-- 显示系统窗口权限 -->
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<!-- 在 屏幕最顶部显示addview -->
<uses-permission android:name="android.permission.SYSTEM_OVERLAY_WINDOW" />

2.2、显示类，显示副屏

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@SuppressLint("NewApi")
public class XHPresentation extends Presentation
{
 
    public XHPresentation(Context outerContext, Display display) {
        super(outerContext, display);
        // TODO Auto-generated constructor stub
    }
     
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.second_screen);
    }
}

2.3、在主程序中显示副显示器　　

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// 双屏显示
DisplayManager mDisplayManager;// 屏幕管理类
Display[] displays;// 屏幕数组
mDisplayManager = (DisplayManager) MainActivity.this.getSystemService(Context.DISPLAY_SERVICE);
displays = mDisplayManager.getDisplays(); // 得到显示器数组
XHPresentation mPresentation = new XHPresentation(getApplicationContext(), displays[1]);// displays[1]是副屏
mPresentation.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
mPresentation.show();

三、daemon,副屏播放视频

3.1、MainActivity.java

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package com.gatsby.dualscreen;
 
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.hardware.display.DisplayManager;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.Button;
 
public class MainActivity extends Activity implements OnClickListener {
 
    Button btn1, btn2;
    Intent intentService;
    private final static String SERVICE_ACTION = "com.xh.dualscreen.actions";
    private boolean isShowSecondScreen = false;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_screen);
 
        btn1 = (Button) findViewById(R.id.btn1);
        btn2 = (Button) findViewById(R.id.btn2);
        btn1.setOnClickListener(this);
        btn2.setOnClickListener(this);
 
        intentService = new Intent(MainActivity.this, XHShowService.class);
        startService(intentService);
        isShowSecondScreen = true;
    }
 
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
 
        switch (v.getId()) {
        case R.id.btn1:
            // 双屏显示
 
            break;
        case R.id.btn2:
            if (!isShowSecondScreen) {
                Log.d("gatsby", "gatsby XHShowService!");
                Intent i = new Intent(MainActivity.this, XHShowService.class);
                startService(i);
                isShowSecondScreen = true;
            } else {
                Log.d("gatsby", "gatsby XHShowService is started!");
                Intent i = new Intent(SERVICE_ACTION);
                i.putExtra("receiver_key", 0);
                sendBroadcast(i);
                isShowSecondScreen = false;
            }
            break;
        }
    }
 
    @Override
    protected void onDestroy() {
        super.onDestroy();
 
        Intent i = new Intent(SERVICE_ACTION);
        i.putExtra("receiver_key", 0);
        sendBroadcast(i);
        isShowSecondScreen = false;
    }
 
}

3.2、XHShowService.java

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package com.gatsby.dualscreen;
 
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
import android.annotation.SuppressLint;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.PixelFormat;
import android.hardware.display.DisplayManager;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.util.Log;
import android.view.Display;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.WindowManager;
import android.widget.LinearLayout;
 
public class XHShowService extends Service {
 
    private static final String TAG = "gatsby";
 
    // public final static String HDMI_PATH = "/mnt/sdcard/hdmi.mp4";
    public final static String HDMI_PATH = "/mnt/sdcard/hdmi";
 
    private List<String> hdmiVideoPath = new ArrayList<>();
    private Display[] displays;
    private MediaPlayer mBackgroundPlayer;
 
    private SurfaceView presentSurface;
    private XHPresentation myPresentation;
    private DisplayManager mDisplayManager;
 
    private int nowHdmiPosition = 0;
 
    MsgReceiver receiver;
 
    private final static String SERVICE_ACTION = "com.xh.dualscreen.actions";
 
    // 接收activity 发送过来的广播，来作相应的播放处理。目前就做了一个切换功能。可以加上下一曲和暂停等一些功能。
    class MsgReceiver extends BroadcastReceiver {
        @SuppressLint("NewApi")
        @Override
        public void onReceive(Context context, Intent intent) {
 
            Log.d(TAG, "XHShowService onReceive-->" + intent.getAction());
 
            if (intent != null) {
                if (intent.getIntExtra("receiver_key", -1) == 0) {
                    Log.d(TAG, "XHShowService onReceive getIntExtra ");
                    myPresentation.dismiss();
                    unregisterReceiver(receiver);
                    stopSelf();
                }
            }
        }
    }
 
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
 
    @SuppressLint("NewApi")
    @Override
    public void onCreate() {
        super.onCreate();
 
        Log.d(TAG, "XHShowService onCreate!!!");
        // 获取显示设备
        mDisplayManager = (DisplayManager) getSystemService(Context.DISPLAY_SERVICE);
 
        displays = mDisplayManager.getDisplays();// get the number of displays
 
        Log.d(TAG, "xhDisplays=" + displays.length);
 
        if (displays.length > 1) {
            showPresentation(displays[1]);// displays[0]:main_screen displays[1]:second_screen
            // 注册广播
            receiver = new MsgReceiver();
            IntentFilter intentFilter = new IntentFilter();
 
            intentFilter.addAction(SERVICE_ACTION);
 
            registerReceiver(receiver, intentFilter);
 
            initViewSurface();
        }
    }
 
    @SuppressLint({ "InflateParams", "NewApi" })
    private void initViewSurface() {
        mBackgroundPlayer = new MediaPlayer();
        // ָ指定流媒体类型
        mBackgroundPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        hdmiVideoPath = XHFileUtils.getPaths(HDMI_PATH);
 
        WindowManager mWindowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
        // 获取LayoutParams对象
        WindowManager.LayoutParams wmParams = new WindowManager.LayoutParams();
        wmParams.type = WindowManager.LayoutParams.TYPE_PHONE;
        wmParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
        wmParams.format = PixelFormat.RGBA_8888;
        wmParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
        wmParams.gravity = Gravity.LEFT | Gravity.TOP;
        wmParams.x = 0;
        wmParams.y = 0;
        // 宽度和高度为0, 可以避免主屏退出后出现的主屏触摸和点击问题
        wmParams.width = 0;
        wmParams.height = 0;
 
        LayoutInflater inflater = LayoutInflater.from(this);
        LinearLayout presentationLayout = (LinearLayout) inflater.inflate(R.layout.second_screen, null);
        presentationLayout.setFocusable(false);
        mWindowManager.addView(presentationLayout, wmParams);
 
        playVideo(mBackgroundPlayer, nowHdmiPosition, true);
    }
 
    // 将内容显示到display上面。
    @SuppressLint("NewApi")
    private void showPresentation(Display display) {
        myPresentation = new XHPresentation(this, display, true);
        myPresentation.setOnDismissListener(new DialogInterface.OnDismissListener() {
            @Override
            public void onDismiss(DialogInterface dialog) {
                // 监听消失，保存当前播放位置。
            }
        });
        myPresentation.getWindow().setType(WindowManager.LayoutParams.TYPE_PHONE);
        myPresentation.show();
 
        presentSurface = myPresentation.getSurface();
        presentSurface.getHolder().addCallback(new MySurfaceCallback());
    }
 
    // 统一的播放界面
    private void playVideo(MediaPlayer mediaPlayer, int pathIndex, boolean isFirstPlay) {
        if (isFirstPlay) {
            mediaPlayer.setOnCompletionListener(new MyVideoFinishListener());
            try {
                nowHdmiPosition = 0;
                if ((hdmiVideoPath != null) && (hdmiVideoPath.size() > 0)) {
                    // mediaPlayer.setDataSource(HDMI_PATH);
                    mediaPlayer.setDataSource(hdmiVideoPath.get(0));
                }
 
            } catch (IOException e) {
                e.printStackTrace();
            }
 
            try {
                mediaPlayer.prepare();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (Exception e) {
            }
            mediaPlayer.start();
        } else {
            mediaPlayer.reset();
            mediaPlayer.setOnCompletionListener(new MyVideoFinishListener());
            try {
                // mediaPlayer.setDataSource(HDMI_PATH);
                mediaPlayer.setDataSource(hdmiVideoPath.get(pathIndex));
            } catch (IOException e) {
                e.printStackTrace();
            }
 
            try {
                mediaPlayer.prepare();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (Exception e) {
            }
            mediaPlayer.start();
        }
    }
 
    class MyVideoFinishListener implements MediaPlayer.OnCompletionListener {
        @Override
        public void onCompletion(MediaPlayer mp) {
            nowHdmiPosition++;
            if (nowHdmiPosition >= hdmiVideoPath.size()) {
                nowHdmiPosition = 0;
            }
            playVideo(mp, nowHdmiPosition, false);
        }
    }
 
    class MySurfaceCallback implements SurfaceHolder.Callback {
 
        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            mBackgroundPlayer.setDisplay(presentSurface.getHolder());
        }
 
        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
 
        }
 
        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
 
        }
    }
 
    @Override
    public void onDestroy() {
        super.onDestroy();
        mBackgroundPlayer.release();
    }
}

　https://download.csdn.net/download/qq_40949012/12651236

　　

 

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