Android 播放MP4檔案
阿新 • • 發佈:2018-11-10
首先,要在AndroidManifest.xml檔案中新增相應的許可權:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
第二步,佈局檔案:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="360dp" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height ="wrap_content"
android:gravity="center_horizontal"
android:orientation="horizontal" >
<ImageButton
android:id="@+id/btnplay"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src ="@drawable/play" />
<ImageButton
android:id="@+id/btnpause"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/pause" />
<ImageButton
android:id="@+id/btnstop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/stop" />
</LinearLayout>
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout >
第三步,主程式碼部分:
package com.example.teltplay;
import java.io.File;
import java.io.IOException;
import android.app.Activity;
import android.content.res.AssetFileDescriptor;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.media.MediaPlayer.OnSeekCompleteListener;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.TextView;
public class MainActivity extends Activity implements OnClickListener{
private ImageButton btnplay, btnstop, btnpause;
private SurfaceView surfaceView;
private MediaPlayer mediaPlayer;
private int position;
TextView textView1;
private String filename = Environment.getExternalStorageDirectory().getPath()+"/TestLog/test.mp4";;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnplay=(ImageButton)this.findViewById(R.id.btnplay);
btnstop=(ImageButton)this.findViewById(R.id.btnstop);
btnpause=(ImageButton)this.findViewById(R.id.btnpause);
textView1=(TextView)this.findViewById(R.id.textView1);
btnstop.setOnClickListener(this);
btnplay.setOnClickListener(this);
btnpause.setOnClickListener(this);
mediaPlayer=new MediaPlayer();
surfaceView=(SurfaceView) this.findViewById(R.id.surfaceView);
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
textView1.setText("播放完畢!...");
}
});
mediaPlayer.setOnErrorListener(new OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
textView1.setText("播放出錯!...");
return false;
}
});
mediaPlayer.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
textView1.setText("準備就緒!...");
}
});
mediaPlayer.setOnSeekCompleteListener(new OnSeekCompleteListener() {
@Override
public void onSeekComplete(MediaPlayer mp) {
textView1.setText("進度拖放完畢!...");
}
});
//設定SurfaceView自己不管理的緩衝區
surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
surfaceView.getHolder().addCallback(new Callback() {
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (position>0) {
try {
//開始播放
play();
//並直接從指定位置開始播放
mediaPlayer.seekTo(position);
position=0;
} catch (Exception e) {
// TODO: handle exception
}
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
});
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnplay:
play();
break;
case R.id.btnpause:
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
}else{
mediaPlayer.start();
}
break;
case R.id.btnstop:
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
}
break;
default:
break;
}
}
@Override
protected void onPause() {
//先判斷是否正在播放
if (mediaPlayer.isPlaying()) {
//如果正在播放我們就先儲存這個播放位置
position=mediaPlayer.getCurrentPosition();
mediaPlayer.stop();
}
super.onPause();
}
private void play() {
try {
mediaPlayer.reset();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//設定需要播放的視訊
mediaPlayer.setDataSource(filename);
//把視訊畫面輸出到SurfaceView
mediaPlayer.setDisplay(surfaceView.getHolder());
mediaPlayer.prepare();
//播放
mediaPlayer.start();
} catch (Exception e) {
// TODO: handle exception
}
}
}