【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"/>