Android – Video/Music 视频音乐播发

Android – Video/Music 视频音乐播放

package org.apache.android.media;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.URLUtil;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Toast;
import android.widget.VideoView;

public class VideoViewDemo extends Activity {
	private static final String TAG = "VideoViewDemo";

	private VideoView mVideoView;
	private EditText mPath;
	private ImageButton mPlay;
	private ImageButton mPause;
	private ImageButton mReset;
	private ImageButton mStop;
	private String current;

	@Override
	public void onCreate(Bundle icicle) {
		super.onCreate(icicle);
		setContentView(R.layout.main);
		mVideoView = (VideoView) findViewById(R.id.surface_view);

		mPath = (EditText) findViewById(R.id.path);
		mPath.setText("http://daily3gp.com/vids/747.3gp");

		mPlay = (ImageButton) findViewById(R.id.play);
		mPause = (ImageButton) findViewById(R.id.pause);
		mReset = (ImageButton) findViewById(R.id.reset);
		mStop = (ImageButton) findViewById(R.id.stop);

		mPlay.setOnClickListener(new OnClickListener() {
			public void onClick(View view) {
				playVideo();
			}
		});
		mPause.setOnClickListener(new OnClickListener() {
			public void onClick(View view) {
				if (mVideoView != null) {
					mVideoView.pause();
				}
			}
		});
		mReset.setOnClickListener(new OnClickListener() {
			public void onClick(View view) {
				if (mVideoView != null) {
					mVideoView.seekTo(0);
				}
			}
		});
		mStop.setOnClickListener(new OnClickListener() {
			public void onClick(View view) {
				if (mVideoView != null) {
					current = null;
					mVideoView.stopPlayback();
				}
			}
		});
		runOnUiThread(new Runnable(){
			public void run() {
				playVideo();

			}

		});
	}

	private void playVideo() {
		try {
			final String path = mPath.getText().toString();
			Log.v(TAG, "path: " + path);
			if (path == null || path.length() == 0) {
				Toast.makeText(VideoViewDemo.this, "File URL/path is empty",
						Toast.LENGTH_LONG).show();

			} else {
				// If the path has not changed, just start the media player
				if (path.equals(current) && mVideoView != null) {
					mVideoView.start();
					mVideoView.requestFocus();
					return;
				}
				current = path;
				mVideoView.setVideoPath(getDataSource(path));
				mVideoView.start();
				mVideoView.requestFocus();

			}
		} catch (Exception e) {
			Log.e(TAG, "error: " + e.getMessage(), e);
			if (mVideoView != null) {
				mVideoView.stopPlayback();
			}
		}
	}

	private String getDataSource(String path) throws IOException {
		if (!URLUtil.isNetworkUrl(path)) {
			return path;
		} else {
			URL url = new URL(path);
			URLConnection cn = url.openConnection();
			cn.connect();
			InputStream stream = cn.getInputStream();
			if (stream == null)
				throw new RuntimeException("stream is null");
			File temp = File.createTempFile("mediaplayertmp", "dat");
			temp.deleteOnExit();
			String tempPath = temp.getAbsolutePath();
			FileOutputStream out = new FileOutputStream(temp);
			byte buf[] = new byte[128];
			do {
				int numread = stream.read(buf);
				if (numread <= 0)
					break;
				out.write(buf, 0, numread);
			} while (true);
			try {
				stream.close();
			} catch (IOException ex) {
				Log.e(TAG, "error: " + ex.getMessage(), ex);
			}
			return tempPath;
		}
	}
}