Android(Java):视频播放
2013-11-25 16:09
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在main.xml布局文件添加用于视频画面绘制的SurfaceView控件:
<SurfaceViewandroid:layout_width="fill_parent"
android:layout_height="240dip"
android:id="@+id/surfaceView" />
SurfaceViewsurfaceView = (SurfaceView)this.findViewById(R.id.surfaceView);
surfaceView.getHolder().setFixedSize(176, 144);
//设置分辨率
/*下面设置Surface不维护自己的缓冲区,而是等待屏幕的渲染引擎将内容推送到用户面前*/
surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
MediaPlayermediaPlayer = new
MediaPlayer();
mediaPlayer.reset();//重置为初始状态
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
/* 设置Video影片以SurfaceHolder播放 */
mediaPlayer.setDisplay(surfaceView.getHolder());
mediaPlayer.setDataSource("/mnt/sdcard/oppo.mp4");
mediaPlayer.prepare();//缓冲
mediaPlayer.start();//播放
mediaPlayer.pause();//暂停播放
mediaPlayer.start();//恢复播放
mediaPlayer.stop();//停止播放
mediaPlayer.release();//释放资源
package cn.itcast.video;
import java.io.IOException;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
public class VideoActivity extends Activity {
private static final String TAG = "VideoActivity";
private EditTextfilenameText;
private SurfaceViewsurfaceView;
private MediaPlayermediaPlayer;
private String filename;//当前播放文件的名称
private
int position;//记录播放位置
@Override
public void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.mediaPlayer = new
MediaPlayer();
this.filenameText = (EditText)
this.findViewById(R.id.filename);
this.surfaceView = (SurfaceView)
this.findViewById(R.id.surfaceView);
ImageButtonplayButton = (ImageButton)
this.findViewById(R.id.play);
ImageButtonpauseButton = (ImageButton)
this.findViewById(R.id.pause);
ImageButtonresetButton = (ImageButton)
this.findViewById(R.id.reset);
ImageButtonstopButton = (ImageButton)
this.findViewById(R.id.stop);
ButtonClickListener listener = new
ButtonClickListener();
playButton.setOnClickListener(listener);
pauseButton.setOnClickListener(listener);
resetButton.setOnClickListener(listener);
stopButton.setOnClickListener(listener);
/*下面设置Surface不维护自己的缓冲区,而是等待屏幕的渲染引擎将内容推送到用户面前*/
this.surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
this.surfaceView.getHolder().setFixedSize(176, 144);//设置分辨率
this.surfaceView.getHolder().setKeepScreenOn(true);
this.surfaceView.getHolder().addCallback(new
SurfaceListener());
}
private class ButtonClickListener implements
View.OnClickListener{
@Override
public void onClick(View v) {
try {
switch (v.getId()) {
case R.id.play://来自播放按钮
filename =
filenameText.getText().toString();
play();
break;
case R.id.pause://来自暂停按钮
if(mediaPlayer.isPlaying()){
mediaPlayer.pause();
}else{
mediaPlayer.start();
}
break;
case R.id.reset://来自重新播放按钮
if(!mediaPlayer.isPlaying()) play();
mediaPlayer.seekTo(0);
break;
case R.id.stop://来自停止按钮
if(mediaPlayer.isPlaying())
mediaPlayer.stop();
break;
}
} catch (Exception e) {
Log.e(TAG,
e.toString());
}
}
}
/**
* 播放视频
*/
private void play() throws
IOException {
mediaPlayer.reset();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource("/mnt/sdcard/"+
filename);//设置需要播放的视频
mediaPlayer.setDisplay(surfaceView.getHolder());//把视频画面输出到SurfaceView
mediaPlayer.prepare();
mediaPlayer.start();
}
private class SurfaceListener implements
SurfaceHolder.Callback{
@Override
public void surfaceChanged(SurfaceHolder holder,
int format,
int width, int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {//方法在onResume()后被调用
Log.i(TAG, "surfaceCreated()");
if(position>0 && filename!=null){
try {
play();
mediaPlayer.seekTo(position);
position = 0;
} catch (Exception e) {
Log.e(TAG,
e.toString());
}
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i(TAG, "surfaceDestroyed()");
}
}
@Override
protected void
onPause() {//当其他Activity被打开,停止播放
if(mediaPlayer.isPlaying()){
position = mediaPlayer.getCurrentPosition();//得到播放位置
mediaPlayer.stop();
}
super.onPause();
}
@Override
protected void
onDestroy() {
if(mediaPlayer.isPlaying())
mediaPlayer.stop();
mediaPlayer.release();
super.onDestroy();
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:background="#FFFFFF"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/filename"
/>
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="oppo.mp4"
android:id="@+id/filename"
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/play"
android:id="@+id/play"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/pause"
android:id="@+id/pause"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/reset"
android:id="@+id/reset"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/stop"
android:id="@+id/stop"
/>
</LinearLayout>
<SurfaceView
android:layout_width="fill_parent"
android:layout_height="240dip"
android:id="@+id/surfaceView"
/>
</LinearLayout>
<SurfaceViewandroid:layout_width="fill_parent"
android:layout_height="240dip"
android:id="@+id/surfaceView" />
SurfaceViewsurfaceView = (SurfaceView)this.findViewById(R.id.surfaceView);
surfaceView.getHolder().setFixedSize(176, 144);
//设置分辨率
/*下面设置Surface不维护自己的缓冲区,而是等待屏幕的渲染引擎将内容推送到用户面前*/
surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
MediaPlayermediaPlayer = new
MediaPlayer();
mediaPlayer.reset();//重置为初始状态
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
/* 设置Video影片以SurfaceHolder播放 */
mediaPlayer.setDisplay(surfaceView.getHolder());
mediaPlayer.setDataSource("/mnt/sdcard/oppo.mp4");
mediaPlayer.prepare();//缓冲
mediaPlayer.start();//播放
mediaPlayer.pause();//暂停播放
mediaPlayer.start();//恢复播放
mediaPlayer.stop();//停止播放
mediaPlayer.release();//释放资源
package cn.itcast.video;
import java.io.IOException;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
public class VideoActivity extends Activity {
private static final String TAG = "VideoActivity";
private EditTextfilenameText;
private SurfaceViewsurfaceView;
private MediaPlayermediaPlayer;
private String filename;//当前播放文件的名称
private
int position;//记录播放位置
@Override
public void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.mediaPlayer = new
MediaPlayer();
this.filenameText = (EditText)
this.findViewById(R.id.filename);
this.surfaceView = (SurfaceView)
this.findViewById(R.id.surfaceView);
ImageButtonplayButton = (ImageButton)
this.findViewById(R.id.play);
ImageButtonpauseButton = (ImageButton)
this.findViewById(R.id.pause);
ImageButtonresetButton = (ImageButton)
this.findViewById(R.id.reset);
ImageButtonstopButton = (ImageButton)
this.findViewById(R.id.stop);
ButtonClickListener listener = new
ButtonClickListener();
playButton.setOnClickListener(listener);
pauseButton.setOnClickListener(listener);
resetButton.setOnClickListener(listener);
stopButton.setOnClickListener(listener);
/*下面设置Surface不维护自己的缓冲区,而是等待屏幕的渲染引擎将内容推送到用户面前*/
this.surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
this.surfaceView.getHolder().setFixedSize(176, 144);//设置分辨率
this.surfaceView.getHolder().setKeepScreenOn(true);
this.surfaceView.getHolder().addCallback(new
SurfaceListener());
}
private class ButtonClickListener implements
View.OnClickListener{
@Override
public void onClick(View v) {
try {
switch (v.getId()) {
case R.id.play://来自播放按钮
filename =
filenameText.getText().toString();
play();
break;
case R.id.pause://来自暂停按钮
if(mediaPlayer.isPlaying()){
mediaPlayer.pause();
}else{
mediaPlayer.start();
}
break;
case R.id.reset://来自重新播放按钮
if(!mediaPlayer.isPlaying()) play();
mediaPlayer.seekTo(0);
break;
case R.id.stop://来自停止按钮
if(mediaPlayer.isPlaying())
mediaPlayer.stop();
break;
}
} catch (Exception e) {
Log.e(TAG,
e.toString());
}
}
}
/**
* 播放视频
*/
private void play() throws
IOException {
mediaPlayer.reset();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource("/mnt/sdcard/"+
filename);//设置需要播放的视频
mediaPlayer.setDisplay(surfaceView.getHolder());//把视频画面输出到SurfaceView
mediaPlayer.prepare();
mediaPlayer.start();
}
private class SurfaceListener implements
SurfaceHolder.Callback{
@Override
public void surfaceChanged(SurfaceHolder holder,
int format,
int width, int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {//方法在onResume()后被调用
Log.i(TAG, "surfaceCreated()");
if(position>0 && filename!=null){
try {
play();
mediaPlayer.seekTo(position);
position = 0;
} catch (Exception e) {
Log.e(TAG,
e.toString());
}
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i(TAG, "surfaceDestroyed()");
}
}
@Override
protected void
onPause() {//当其他Activity被打开,停止播放
if(mediaPlayer.isPlaying()){
position = mediaPlayer.getCurrentPosition();//得到播放位置
mediaPlayer.stop();
}
super.onPause();
}
@Override
protected void
onDestroy() {
if(mediaPlayer.isPlaying())
mediaPlayer.stop();
mediaPlayer.release();
super.onDestroy();
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:background="#FFFFFF"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/filename"
/>
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="oppo.mp4"
android:id="@+id/filename"
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/play"
android:id="@+id/play"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/pause"
android:id="@+id/pause"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/reset"
android:id="@+id/reset"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/stop"
android:id="@+id/stop"
/>
</LinearLayout>
<SurfaceView
android:layout_width="fill_parent"
android:layout_height="240dip"
android:id="@+id/surfaceView"
/>
</LinearLayout>
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