在sufaceview上播放视频

转载

chengyuan880509 2011-07-25 13:56:14

文章标签 职场休闲播放视频 sufaceview 文章分类 Android 移动开发

package com.google.activity.video;
import java.io.IOException;
import android.graphics.PixelFormat;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.TextView;
import com.google.Main;
import com.google.R;
import com.google.util.MemoryStatusUtil;
import com.google.util.ToastUtil;
public class Index2Activity extends Main implements SurfaceHolder.Callback {
/** 日志TAG */
private static final String TAG = "**********Index2Activity.java*********";
/** 播放、暂停、重置、停止等按钮 */
private ImageButton mBt_play,mBt_pause ,mBt_reset ,mBt_stop;
/** 显示视屏 */
private SurfaceView mSurfaceView;
/** 显示控制信息 */
private TextView mTextView;
/** 用surfaceHolder来控制surfaceview */
private SurfaceHolder mSurfaceHolder;
/** 创建媒体 */
private MediaPlayer mMediaPlayer;
/** 视频文件路径 */
private static final String strVideoPath = "/sdcard/cctv2.3gp";
/** mediaplayer是否暂停 */
private boolean mIsPaused = false;
/** 媒体文件是否释放 */
private boolean mIsReleased = false;
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.video2);
//不存在内存卡提示
checkExternalMemory();
setUI();
}
//检测内存卡
private void checkExternalMemory(){
if(!MemoryStatusUtil.externalMemoryAvailable())
{
ToastUtil.makTextToast(this, R.string.str_err_nosd, true);
return ;
}
}
/** 获取控件 */
private void setUI(){
//设置系统的PixelFormat为 UNKNOWN
getWindow().setFormat(PixelFormat.UNKNOWN);
mTextView = (TextView) findViewById(R.id.video_title2);
mBt_pause = (ImageButton) findViewById(R.id.video_pause);
mBt_play = (ImageButton) findViewById(R.id.video_play);
mBt_reset = (ImageButton) findViewById(R.id.video_reset);
mBt_stop = (ImageButton) findViewById(R.id.video_stop);
mSurfaceView = (SurfaceView) findViewById(R.id.mSurfaceView);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setFixedSize(176, 144);//设置影片大小
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
setListener();
}
/** 设置按钮的监听器 */
private void setListener(){
mBt_pause.setOnClickListener(listener);
mBt_play.setOnClickListener(listener);
mBt_reset.setOnClickListener(listener);
mBt_stop.setOnClickListener(listener);
}
/** 按钮监听事件 */
private OnClickListener listener = new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId())
{
//播放按钮
case R.id.video_play:
playVideo(strVideoPath);
break;
//暂停按钮
case R.id.video_pause:
if(mMediaPlayer != null)
{
if(mIsReleased == false)
{
if(mIsPaused == false)//前一个状态未暂停，则暂停
{
mMediaPlayer.pause();
mIsPaused = true;
mTextView.setText(R.string.video_pause);
}
else //前一个状态已暂停，则开启
{
mMediaPlayer.start();
mIsPaused = false;
mTextView.setText(R.string.video_play);
}
}
}
break;
//重置按钮
case R.id.video_reset:
if(mIsReleased == false)
{
if(mMediaPlayer != null)
{
mMediaPlayer.seekTo(0);//重新播放
}
}
break;
//停止按钮
case R.id.video_stop:
if(mMediaPlayer != null)
{
if(mIsReleased == false)
{
mMediaPlayer.stop();
mMediaPlayer.release();
mMediaPlayer = null;
mIsReleased = true ;
mTextView.setText(R.string.video_stop);
}
}
break;
default:
break;
}
}
};
/**
* 播放视屏函数
* @param filename 视屏文件路径
*/
private void playVideo(final String filename){
if(mMediaPlayer != null){
mMediaPlayer.stop();
}
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//设置影片以surfaceview的形式播放
mMediaPlayer.setDisplay(mSurfaceHolder);
try {
mMediaPlayer.setDataSource(filename);
mMediaPlayer.prepare();
mMediaPlayer.start();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//设置一些标志信息
mIsReleased = false;
mTextView.setText(R.string.video_play);
mMediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
try {
mMediaPlayer.release();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mTextView.setText(R.string.video_stop);
}
});
mMediaPlayer.setOnErrorListener(new OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
// TODO Auto-generated method stub
try {
mMediaPlayer.release();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mTextView.setText(R.string.str_OnErrorListener);
return false;
}
});
}
/** 以下是实现surfaceHolder.callback中的方法 */
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}