Android--SurfaceView和MediaPlayer的使用

现在 ,我们来学习一下让SurfaceView和MediaPlayer怎么联合使用:

先给大家看一下效果图:

布局文件:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <SurfaceView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="8"
        android:id="@+id/surfaceview"
        />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:orientation="horizontal"
        >
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            />
        <Button
            android:id="@+id/btn_start"
            android:text="开始"
            android:textColor="#ffffff"
            android:textSize="22sp"
            android:background="#F29061"
            android:layout_margin="3dp"
            android:layout_width="0dp"
            android:layout_weight="5"
            android:layout_height="match_parent" />
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            />
        <Button
            android:id="@+id/btn_pause"
            android:text="暂停"
            android:textColor="#ffffff"
            android:textSize="22sp"
            android:background="#F29061"
            android:layout_margin="3dp"
            android:layout_width="0dp"
            android:layout_weight="5"
            android:layout_height="match_parent" />
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            />
        <Button
            android:id="@+id/btn_stop"
            android:text="停止"
            android:textColor="#ffffff"
            android:textSize="22sp"
            android:background="#F29061"
            android:layout_margin="3dp"
            android:layout_width="0dp"
            android:layout_weight="5"
            android:layout_height="match_parent" />
        <TextView
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            />
    </LinearLayout>
</LinearLayout>

主函数:

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private SurfaceView surfaceview;
    private Button btn_start;
    private Button btn_pause;
    private Button btn_stop;
    private MediaPlayer player;
    SurfaceHolder holder;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        holder = surfaceview.getHolder();
        player = new MediaPlayer();
        holder.addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                //开始运行时,就直接播放
                Play();
            }

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

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {

            }
        });

    }

    private void initView() {
        surfaceview = (SurfaceView) findViewById(R.id.surfaceview);
        btn_start = (Button) findViewById(R.id.btn_start);
        btn_pause = (Button) findViewById(R.id.btn_pause);
        btn_stop = (Button) findViewById(R.id.btn_stop);

        btn_start.setOnClickListener(this);
        btn_pause.setOnClickListener(this);
        btn_stop.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_start:
                Play();
                break;
            case R.id.btn_pause:
                //暂停
                if(player.isPlaying()){
                    player.pause();
                }else{
                    player.start();
                }
                break;
            case R.id.btn_stop:
                //停止
                if(player.isPlaying()){
                    player.stop();
                }
                break;
        }
    }
    private void Play(){
        //一定要先重置!!!
        player.reset();
        //播放模式
        player.setAudioStreamType(AudioManager.STREAM_MUSIC);
        try {
            //放视频
            Uri uri = Uri.parse("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4");
            player.setDataSource(MainActivity.this,uri);
            //把视频放到surfaceview上
            player.setDisplay(holder);
            //准备工作
            player.prepare();
            //开始了
            player.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}