Android Media Player音楽再生
13511 ワード
＜1＞本例では、MediaPlayerを用いてsdcardの音楽を再生し、まず/sdcard/ディレクトリに音楽ファイルを追加する（mp 3）デモを行います。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/mTextView" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:text=""></TextView>
<LinearLayout android:id="@+id/ll_list"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ListView android:id="@+id/lv_music" android:layout_width="fill_parent"
android:layout_height="wrap_content"></ListView>
</LinearLayout>
<LinearLayout android:id="@+id/ll_btn"
android:orientation="horizontal" android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageButton android:id="@+id/imgbtn_last" android:src="@drawable/last"
android:layout_width="wrap_content" android:layout_height="wrap_content"></ImageButton>
<ImageButton android:id="@+id/imgbtn_start" android:src="@drawable/start"
android:layout_width="wrap_content" android:layout_height="wrap_content"></ImageButton>
<ImageButton android:id="@+id/imgbtn_pause" android:src="@drawable/pause"
android:visibility="gone" android:layout_width="wrap_content"
android:layout_height="wrap_content"></ImageButton>
<ImageButton android:id="@+id/imgbtn_stop" android:src="@drawable/stop"
android:layout_width="wrap_content" android:layout_height="wrap_content"></ImageButton>
<ImageButton android:id="@+id/imgbtn_next" android:src="@drawable/next"
android:layout_width="wrap_content" android:layout_height="wrap_content"></ImageButton>
</LinearLayout>
<LinearLayout android:id="@+id/ll_btn"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="wrap_content">
<SeekBar android:id="@+id/SeekBar01" android:layout_width="fill_parent"
android:layout_height="wrap_content"></SeekBar>
</LinearLayout>
</LinearLayout>
package com.Aina.Android;
import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.SeekBar;
import android.widget.TextView;
public class Test extends Activity implements Runnable {
/** Called when the activity is first created. */
private MediaPlayer mMediaPlayer = null;
private SeekBar mSeekBar = null;
private ListView mListView = null;
private ImageButton mLastbtn = null;
private ImageButton mStartbtn = null;
private ImageButton mPausebtn = null;
private ImageButton mStopbtn = null;
private ImageButton mNextbtn = null;
private TextView mTextView = null;
private List<String> mMusiclist = null;
private int mCurrent = 0;
private int count = 0;
private boolean isrun = false;
private boolean isauto = false;
private static final String PATH = "/sdcard/";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mListView = (ListView) this.findViewById(R.id.lv_music);
mSeekBar = (SeekBar) this.findViewById(R.id.SeekBar01);
mTextView = (TextView) this.findViewById(R.id.mTextView);
mLastbtn = (ImageButton) this.findViewById(R.id.imgbtn_last);
mStartbtn = (ImageButton) this.findViewById(R.id.imgbtn_start);
mPausebtn = (ImageButton) this.findViewById(R.id.imgbtn_pause);
mStopbtn = (ImageButton) this.findViewById(R.id.imgbtn_stop);
mNextbtn = (ImageButton) this.findViewById(R.id.imgbtn_next);
mMusiclist = new ArrayList<String>();
mMediaPlayer = new MediaPlayer();
//
mStartbtn.setOnClickListener(new ImageButton.OnClickListener() {
@Override
public void onClick(View v) {
PlayMusic(PATH + mMusiclist.get(mCurrent));
}
});
//
mNextbtn.setOnClickListener(new ImageButton.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
NextMusic();
}
});
//
mLastbtn.setOnClickListener(new ImageButton.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
LastMusic();
}
});
//
mPausebtn.setOnClickListener(new ImageButton.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
isrun = true;
isauto = false;
mPausebtn.setVisibility(View.GONE);//
mStartbtn.setVisibility(View.VISIBLE);//
//
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.pause();
}
}
});
//
mStopbtn.setOnClickListener(new ImageButton.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
StopMusic();
}
});
mListView.setOnItemClickListener(new ListView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
mCurrent = arg2;
StopMusic();
PlayMusic(PATH + mMusiclist.get(mCurrent));
}
});
mSeekBar
.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar,
int progress, boolean fromUser) {
if (!isauto) {
// int n = mMediaPlayer.getCurrentPosition();
// mMediaPlayer.pause();
mMediaPlayer.seekTo(progress);
// mMediaPlayer.start();
// isauto = true;
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
isauto = false;
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
isauto = true;
}
});
this.MusicList();
new Thread(this).start();
}
public void PlayMusic(String path) {
try {
mStartbtn.setVisibility(View.GONE);//
mPausebtn.setVisibility(View.VISIBLE);//
if (!isrun) {
mMediaPlayer.reset();//
mMediaPlayer.setDataSource(path);//
mMediaPlayer.prepare();//
mMediaPlayer.start();//
count = mMediaPlayer.getDuration();
Log.i("TAG-count", count + "");
mSeekBar.setMax(count);// .
this.mTextView.setText(" :" + mMusiclist.get(mCurrent));
mMediaPlayer
.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
NextMusic();
}
});
mMediaPlayer.setOnErrorListener(new OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
ShowDialog("Error");
mMediaPlayer.reset();
return true;
}
});
} else {
mMediaPlayer.start();//
}
isauto = true;
} catch (Exception ex) {
this.ShowDialog(" :" + ex.getMessage());
}
}
public void NextMusic() {
int num = mMusiclist.size();
if (++mCurrent >= num) {
mCurrent = 0;
}
StopMusic();
PlayMusic(PATH + mMusiclist.get(mCurrent));
}
public void LastMusic() {
int num = mMusiclist.size();
if (--mCurrent < 0) {
mCurrent = num - 1;
}
StopMusic();
PlayMusic(PATH + mMusiclist.get(mCurrent));
}
@Override
protected void onPause() {
super.onPause();
isauto = false;
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.stop();//
}
mMediaPlayer.reset();
mMediaPlayer.release();
// mMediaPlayer = null;
}
public void StopMusic() {
isrun = false;
// isauto = false;
mPausebtn.setVisibility(View.GONE);//
mStartbtn.setVisibility(View.VISIBLE);//
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.stop();//
}
// mSeekBar.setProgress(0);
}
/**
*
*
* @author Aina
*
*/
class MusicFilter implements FilenameFilter {
@Override
public boolean accept(File dir, String filename) {
return (filename.endsWith(".mp3"));
}
}
/**
*
*/
public void MusicList() {
try {
File home = new File(PATH);
File[] f = home.listFiles(new MusicFilter());
if (f.length > 0) {
for (int i = 0; i < f.length; i++) {
File file = f[i];
mMusiclist.add(file.getName().toString());
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, mMusiclist);
mListView.setAdapter(adapter);
}
} catch (Exception ex) {
this.ShowDialog(" :" + ex.getMessage());
}
}
public void ShowDialog(String str) {
new AlertDialog.Builder(this).setTitle(" ").setMessage(str)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).show();
}
@Override
public void run() {
// TODO Auto-generated method stub
while (true) {
try {
if (isauto) {
int n = mMediaPlayer.getCurrentPosition();
Message msg = new Message();
msg.what = n;
handler.sendMessage(msg);
}
Thread.sleep(100);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
public Handler handler = new Handler() {
public void handleMessage(Message msg) {
super.handleMessage(msg);
mSeekBar.setProgress(msg.what);
mSeekBar.invalidate();
}
};
}
package com.Aina.Android;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
public class Test extends Activity {
/** Called when the activity is first created. */
private MediaPlayer mMediaPlayer = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// mMediaPlayer = MediaPlayer.create(this, R.raw.d);// res/raw
mMediaPlayer = MediaPlayer
.create(
this,
Uri
.parse("http://cd04.static.jango.com/music/07/05/63/0705635592.mp3"));//
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mMediaPlayer.setLooping(true);//
mMediaPlayer.start();
}
@Override
protected void onPause() {
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.stop();
}
mMediaPlayer.reset();
mMediaPlayer.release();
mMediaPlayer = null;
super.onPause();
}
}