SDK开发范例大全源码第8章

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 java.util.ArrayList; import java.util.List; 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 EX08_15 extends Activity implements SurfaceHolder.Callback { private TextView mTextView01; private EditText mEditText01; /* 建立MediaPlayer对象 */ private MediaPlayer mMediaPlayer01; /* 用以配置MediaPlayer的SurfaceView */ private SurfaceView mSurfaceView01; /* SurfaceHolder对象 */ private SurfaceHolder mSurfaceHolder01; 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 = "HippoMediaPlayer"; private String currentFilePath = ""; private String currentTempFilePath = ""; private String strVideoURL = ""; private List<String> aryFileDownloaded; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); /* 将.3gp影像文件存放URL网址 */ strVideoURL = "http://www.dubblogs.cc:8751/Android/Test/Media/3gp/test.3gp"; //http://www.dubblogs.cc:8751/Android/Test/Media/3gp/test2.3gp mTextView01 = (TextView)findViewById(R.id.myTextView1); mEditText01 = (EditText)findViewById(R.id.myEditText1); mEditText01.setText(strVideoURL); /* 初始化临时盘路径数组 */ aryFileDownloaded = new ArrayList<String>(); /* 绑定Layout上的SurfaceView */ mSurfaceView01 = (SurfaceView) findViewById(R.id.mSurfaceView1); /* 设定PixnelFormat */ getWindow().setFormat(PixelFormat.TRANSPARENT); /* 设定SurfaceHolder为Layout SurfaceView */ mSurfaceHolder01 = mSurfaceView01.getHolder(); mSurfaceHolder01.addCallback(this); /* 由于原有的影片Size较小，故指定其为固定比例 */ 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) { if(checkSDCard()) { strVideoURL = mEditText01.getText().toString(); 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) { 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为现有播放的链接，则直接播放 */ if (strPath.equals(currentFilePath) && mMediaPlayer01 != null) { mMediaPlayer01.start(); return; } else if(mMediaPlayer01 != null) { mMediaPlayer01.stop(); } currentFilePath = strPath; /* 重新建构MediaPlayer对象 */ mMediaPlayer01 = new MediaPlayer(); /* 设定播放音量 */ mMediaPlayer01.setAudioStreamType(2); /* 设定显示于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，调用自定义函数抓下文件 */ setDataSource(strPath); /* 下载完后才会调用prepare */ mMediaPlayer01.prepare(); Log.i(TAG, "Duration: " + mMediaPlayer01.getDuration()); mMediaPlayer01.start(); bIsReleased = false;