下载远程视频完成后进行播放(SurfaceView)
1.上代码:package irdc.ex08_15;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.net.URL;import java.net.URLConnection;import android.app.Activity;import android.graphics.PixelFormat;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.webkit.URLUtil;import android.widget.EditText;import android.widget.ImageButton;import android.widget.TextView;/* Activity实现SurfaceHolder.Callback */public class PlayUrlVideo extends Activity implements SurfaceHolder.Callback{private TextView mTextView01;private EditText mEditText01;/* 创建MediaPlayer对象 */private MediaPlayer mMediaPlayer01;/* 用以显示MediaPlayer的SurfaceView */private SurfaceView mSurfaceView01;/* SurfaceHolder对象 */private SurfaceHolder mSurfaceHolder01;//视频控制的几个按钮private ImageButton mPlay, mReset, mPause, mStop;/* 识别MediaPlayer是否已被释放 */private boolean bIsReleased = false;/* 识别MediaPlayer是否正处于暂停 */private boolean bIsPaused = false;/* LogCat输出TAG filter */private static final String TAG = "*****MediaPlayer*****";private String currentFilePath = "";//保存下载文件临时路径private String currentTempFilePath = "";private String strVideoURL = "";/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.main); /* 将.3gp图像文件存放URL网址 */ strVideoURL = "http://www.dubblogs.cc:8751/Android/Test/Media/3gp/test.3gp"; mTextView01 = (TextView) findViewById(R.id.myTextView1); mEditText01 = (EditText) findViewById(R.id.myEditText1); mEditText01.setText(strVideoURL); /* 绑定Layout上的SurfaceView */ mSurfaceView01 = (SurfaceView) findViewById(R.id.mSurfaceView1); // 这句我还看出到底起什么作用 getWindow().setFormat(PixelFormat.TRANSPARENT); /* 设置SurfaceHolder为Layout SurfaceView */ mSurfaceHolder01 = mSurfaceView01.getHolder(); mSurfaceHolder01.addCallback(this); // 影片指定其为固定比例 mSurfaceHolder01.setFixedSize(160, 128); mSurfaceHolder01.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); mPlay = (ImageButton) findViewById(R.id.play); mReset = (ImageButton) findViewById(R.id.reset); mPause = (ImageButton) findViewById(R.id.pause); mStop = (ImageButton) findViewById(R.id.stop); /* 播放按钮 */ mPlay.setOnClickListener(new ImageButton.OnClickListener() { public void onClick(View view) {//判断SD卡是否存在 if (checkSDCard()) { strVideoURL = mEditText01.getText().toString();//开始下载video playVideo(strVideoURL); mTextView01.setText(R.string.str_play); } else { mTextView01.setText(R.string.str_err_nosd); } } }); /* 重新播放按钮 */ mReset.setOnClickListener(new ImageButton.OnClickListener() { public void onClick(View view) { if (checkSDCard()) { if (bIsReleased == false) { if (mMediaPlayer01 != null) {//回到起始点开始重新播放 mMediaPlayer01.seekTo(0); mTextView01.setText(R.string.str_play); } } } else { mTextView01.setText(R.string.str_err_nosd); } } }); /* 暂停按钮 */ mPause.setOnClickListener(new ImageButton.OnClickListener() { public void onClick(View view) { if (checkSDCard()) { if (mMediaPlayer01 != null) { if (bIsReleased == false) { if (bIsPaused == false) { mMediaPlayer01.pause(); bIsPaused = true; mTextView01.setText(R.string.str_pause); } else if (bIsPaused == true) { mMediaPlayer01.start(); bIsPaused = false; mTextView01.setText(R.string.str_play); } } } } else { mTextView01.setText(R.string.str_err_nosd); } } }); /* 终止按钮 */ mStop.setOnClickListener(new ImageButton.OnClickListener() { public void onClick(View view) { if (checkSDCard()) { try { if (mMediaPlayer01 != null) { if (bIsReleased == false) { mMediaPlayer01.seekTo(0); mMediaPlayer01.pause(); mTextView01.setText(R.string.str_stop); } } } catch (Exception e) { mTextView01.setText(e.toString()); Log.e(TAG, e.toString()); e.printStackTrace(); } } else { mTextView01.setText(R.string.str_err_nosd); } } });}/* 自定义下载URL影片并播放 */private void playVideo(final String strPath){ try { /* 若传入的strPath为现有播放的连接，则直接播放 */ if (strPath.equals(currentFilePath) && mMediaPlayer01 != null) { mMediaPlayer01.start(); return; } else if (mMediaPlayer01 != null) { mMediaPlayer01.stop(); } currentFilePath = strPath; /* 重新构建MediaPlayer对象 */ mMediaPlayer01 = new MediaPlayer(); /* 设置播放音量 */ mMediaPlayer01.setAudioStreamType(2); /* 设置显示于SurfaceHolder */ mMediaPlayer01.setDisplay(mSurfaceHolder01); mMediaPlayer01.setOnErrorListener(new MediaPlayer.OnErrorListener() { // @Override public boolean onError(MediaPlayer mp, int what, int extra) { // TODO Auto-generated method stub Log.i(TAG, "Error on Listener, what: " + what + "extra: " + extra); return false; } }); mMediaPlayer01 .setOnBufferingUpdateListener(new MediaPlayer.OnBufferingUpdateListener() { // @Override public void onBufferingUpdate(MediaPlayer mp, int percent) { // TODO Auto-generated method stub Log.i(TAG, "Update buffer: " + Integer.toString(percent) + "%"); } }); mMediaPlayer01 .setOnCompletionListener(new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { // TODO Auto-generated method stub Log.i(TAG, "mMediaPlayer01 Listener Completed"); mTextView01.setText(R.string.str_done); } }); mMediaPlayer01.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { // @Override public void onPrepared(MediaPlayer mp) { // TODO Auto-generated method stub Log.i(TAG, "Prepared Listener"); } }); Runnable r = new Runnable() { public void run() { try { /* 在线程运行中，调用自定义函数下载 */ setDataSource(strPath); /* 下载完后才会调用prepare */ mMediaPlayer01.prepare(); Log.i(TAG, "Duration: " + mMediaPlayer01.getDuration()); mMediaPlayer01.start(); bIsReleased = false; } catch (Exception e) { Log.e(TAG, e.getMessage(), e); } } };//新开启一个线程进行视频下载(增强用户体验) new Thread(r).start(); } catch (Exception e) { if (mMediaPlayer01 != null) { mMediaPlayer01.stop(); mMediaPlayer01.release(); } }}/* 自定义setDataSource，由线程启动 */private void setDataSource(String strPath) throws Exception{//判断地址是否合法 if (!URLUtil.isNetworkUrl(strPath)) {//这里理解为不是合法网址,就传递的local地址 mMediaPlayer01.setDataSource(strPath); } else { if (bIsReleased == false) { URL myURL = new URL(strPath); URLConnection conn = myURL.openConnection(); conn.connect(); InputStream is = conn.getInputStream();//这里可以通过conn.getContentLength()来识别源字节大小,便于添加下载进度条 if (is == null) { throw new RuntimeException("stream is null"); }//获取文件名扩展名，创建临时文件 File myFileTemp = File.createTempFile("hippoplayertmp", "." + getFileExtension(strPath));//获取文件绝对路径 currentTempFilePath = myFileTemp.getAbsolutePath(); /* currentTempFilePath = /sdcard/mediaplayertmp39327.dat *///构建一个输出流写文件 FileOutputStream fos = new FileOutputStream(myFileTemp); byte buf[] = new byte; do { int numread = is.read(buf); if (numread <= 0) { break; } fos.write(buf, 0, numread); } while (true);//下载完成进行MediaPlayer源设置 mMediaPlayer01.setDataSource(currentTempFilePath); try { is.close(); } catch (Exception ex) { Log.e(TAG, "error: " + ex.getMessage(), ex); } } }}//获取下载文件后缀名private String getFileExtension(String strFileName){ File myFile = new File(strFileName); String strFileExtension = myFile.getName(); strFileExtension = (strFileExtension.substring(strFileExtension .lastIndexOf(".") + 1)).toLowerCase(); if (strFileExtension == "") { /* 若无法顺利取得扩展名，默认为.dat */ strFileExtension = "dat"; } return strFileExtension;}private boolean checkSDCard(){ /* 判断存储卡是否存在 */ if (android.os.Environment.getExternalStorageState().equals( android.os.Environment.MEDIA_MOUNTED)) { return true; } else { return false; }}// @Overridepublic void surfaceChanged(SurfaceHolder surfaceholder, int format, int w, int h){ // TODO Auto-generated method stub Log.i(TAG, "Surface Changed");}// @Overridepublic void surfaceCreated(SurfaceHolder surfaceholder){ // TODO Auto-generated method stub Log.i(TAG, "Surface Changed");}// @Overridepublic void surfaceDestroyed(SurfaceHolder surfaceholder){ // TODO Auto-generated method stub Log.i(TAG, "Surface Changed");}//当程序停止后，进行MediaPlayer的资源释放操作@Overrideprotected void onStop(){ super.onStop(); if (mMediaPlayer01 != null) { mMediaPlayer01.stop(); mMediaPlayer01.release(); } this.finish();}}
2.main.xml文件内容比较简单
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:background="@drawable/white" android:orientation="vertical"android:layout_width="fill_parent" android:layout_height="fill_parent"><TextView android:id="@+id/myTextView1" android:layout_width="fill_parent"android:layout_height="wrap_content" android:textColor="@drawable/blue"android:text="@string/hello" /><EditText android:id="@+id/myEditText1" android:layout_width="wrap_content"android:layout_height="wrap_content" android:text=""android:singleLine="True" /><SurfaceView android:id="@+id/mSurfaceView1"android:visibility="visible" android:layout_width="320px"android:layout_height="240px"></SurfaceView><LinearLayout android:orientation="horizontal" android:layout_height="wrap_content" android:layout_width="fill_parent"android:padding="10dip"><ImageButton android:id="@+id/play" android:layout_height="wrap_content"android:layout_width="wrap_content" android:src="@drawable/play" /><ImageButton android:id="@+id/pause"android:layout_height="wrap_content" android:layout_width="wrap_content"android:src="@drawable/pause" /><ImageButton android:id="@+id/reset"android:layout_height="wrap_content" android:layout_width="wrap_content"android:src="@drawable/reset" /><ImageButton android:id="@+id/stop" android:layout_height="wrap_content"android:layout_width="wrap_content" android:src="@drawable/stop" /></LinearLayout></LinearLayout>
3.注意配置文件权限添加
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
部分color.xml文件颜色初始化以及strings.xml中的我这里就不附上了
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