FloatingVideoService

package dongzhong.testforfloatingwindow;

import android.app.Service;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Build;
import android.os.IBinder;
import android.provider.Settings;
import android.support.annotation.Nullable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.WindowManager;
import android.widget.Toast;

import java.io.IOException;

/**

• Created by admin on 2018/5/30.
  */

public class FloatingVideoService extends Service {
public static boolean isStarted = false;

private WindowManager windowManager;
private WindowManager.LayoutParams layoutParams;

private MediaPlayer mediaPlayer;
private View displayView;

@Override
public void onCreate() {
    super.onCreate();
    isStarted = true;
    windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
    layoutParams = new WindowManager.LayoutParams();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
    } else {
        layoutParams.type = WindowManager.LayoutParams.TYPE_PHONE;
    }
    layoutParams.format = PixelFormat.RGBA_8888;
    layoutParams.gravity = Gravity.LEFT | Gravity.TOP;
    layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_FULLSCREEN | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
    layoutParams.width = 800;
    layoutParams.height = 450;
    layoutParams.x = 0;
    layoutParams.y = 0;

// layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
// layoutParams.height = WindowManager.LayoutParams.MATCH_PARENT;
// layoutParams.type = WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
// layoutParams.flags = WindowManager.LayoutParams.FLAG_FULLSCREEN | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
layoutParams.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.SYSTEM_UI_FLAG_FULLSCREEN;

    mediaPlayer = new MediaPlayer();
}

@Nullable
@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    showFloatingWindow();
    return super.onStartCommand(intent, flags, startId);
}

private void showFloatingWindow() {
    if (Settings.canDrawOverlays(this)) {
        LayoutInflater layoutInflater = LayoutInflater.from(this);
        displayView = layoutInflater.inflate(R.layout.video_display, null);
        displayView.setOnTouchListener(new FloatingOnTouchListener());
        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        SurfaceView surfaceView = displayView.findViewById(R.id.video_display_surfaceview);
        final SurfaceHolder surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                mediaPlayer.setDisplay(surfaceHolder);
            }

            @Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {

            }
        });
        mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mediaPlayer.start();
            }
        });
        try {
            mediaPlayer.setDataSource(this, Uri.parse("https://raw.githubusercontent.com/dongzhong/ImageAndVideoStore/master/Bruno%20Mars%20-%20Treasure.mp4"));
            mediaPlayer.prepareAsync();
        }
        catch (IOException e) {
            Toast.makeText(this, "无法打开视频源", Toast.LENGTH_LONG).show();
        }
        windowManager.addView(displayView, layoutParams);
    }
}

private class FloatingOnTouchListener implements View.OnTouchListener {
    private int x;
    private int y;

    @Override
    public boolean onTouch(View view, MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                x = (int) event.getRawX();
                y = (int) event.getRawY();
                break;
            case MotionEvent.ACTION_MOVE:
                int nowX = (int) event.getRawX();
                int nowY = (int) event.getRawY();
                int movedX = nowX - x;
                int movedY = nowY - y;
                x = nowX;
                y = nowY;
                layoutParams.x = layoutParams.x + movedX;
                layoutParams.y = layoutParams.y + movedY;
                windowManager.updateViewLayout(view, layoutParams);
                break;
            default:
                break;
        }
        return true;
    }
}

}