【Android 多媒体应用】使用 MediaPlayer 播放视频

1.MainActivity.java

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;

import java.io.IOException;

public class MainActivity extends AppCompatActivity implements View.OnClickListener, SurfaceHolder.Callback {

    private MediaPlayer mPlayer;
    private SurfaceView sfv_show;
    private SurfaceHolder surfaceHolder;
    private Button btn_start;
    private Button btn_pause;
    private Button btn_stop;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initUI();

    }

    private void initUI() {
        sfv_show = (SurfaceView) findViewById(R.id.sfv_show);
        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);

        //初始化SurfaceHolder类，SurfaceView的控制器
        surfaceHolder = sfv_show.getHolder();
        surfaceHolder.addCallback(this);
        //显示的分辨率,不设置为视频默认
        surfaceHolder.setFixedSize(320, 240);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_start:
                if(!mPlayer.isPlaying()) {
                    mPlayer.start();
                }
                break;
            case R.id.btn_pause:
                mPlayer.pause();
                break;
            case R.id.btn_stop:
                mPlayer.stop();
                break;
        }
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        mPlayer = new MediaPlayer();
        mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        //设置显示视频显示在SurfaceView上
        mPlayer.setDisplay(surfaceHolder);
        try {
            mPlayer.setDataSource("/sdcard/TopGirl.mp4");
            mPlayer.prepare();
        }catch (IOException e){

            e.printStackTrace();
        }
    }

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

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {}

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mPlayer.isPlaying()) {
            mPlayer.stop();
        }
        mPlayer.release();
    }
}

2.activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <SurfaceView
        android:id="@+id/sfv_show"
        android:layout_width="match_parent"
        android:layout_height="300dp" />
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">
    <Button
        android:id="@+id/btn_start"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="开始" />

    <Button
        android:id="@+id/btn_pause"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="暂停 " />

    <Button
        android:id="@+id/btn_stop"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="停止" />
</LinearLayout>

</LinearLayout>

3.AndroidMainfest.xml中添加权限

 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>