android 手机下载 3gp 示例程序

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.os.Environment; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.View.OnClickListener; 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, OnClickListener { private TextView mTextView01; private EditText mEditText01; /* 创建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; private static final String TAG = "HippoMediaPlayer"; private String currentFilePath = ""; private String currentTempFilePath = ""; private String strVideoURL = ""; private List fileDownloaded_List; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); /**定义临时文件路径列表 */ fileDownloaded_List = new ArrayList<String>(); /* 将.3gp图像文件存放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); mSurfaceView01 = (SurfaceView) findViewById(R.id.mSurfaceView1); /* 设置PixnelFormat */ getWindow().setFormat(PixelFormat.TRANSPARENT); /* 设置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); mPlay.setOnClickListener(this); mReset.setOnClickListener(this); mPause.setOnClickListener(this); mStop.setOnClickListener(this); } @Override public void onClick(View v) { switch(v.getId()){ case R.id.play: // 播放 if(checkSDCard()) { strVideoURL = mEditText01.getText().toString(); playVideo(strVideoURL); mTextView01.setText(R.string.str_play); } else mTextView01.setText(R.string.str_err_nosd); break; case R.id.reset: // 重新播放 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); break; case R.id.pause: // 暂停 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); break; case R.id.stop: // 终止 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); break; } } /* 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) { 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) { Log.i(TAG, "Update buffer: " + Integer.toString(percent) + "%"); } }); mMediaPlayer01.setOnCompletionListener (new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { Log.i(TAG,"mMediaPlayer01 Listener Completed"); mTextView01.setText(R.string.str_done); } }); mMediaPlayer01.setOnPreparedListener (new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { 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; } catch (Exception e) { Log.e(TAG, e.getMessage(), e); } } }; 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 { if (!URLUtil.isNetworkUrl(strPath)) mMediaPlayer01.setDataSource(strPath); else { if(bIsReleased == false) { URL myURL = new URL(strPath); URLConnection conn = myURL.openConnection(); conn.connect(); InputStream is = conn.getInputStream(); if (is == null) { throw new RuntimeExcept