package com.zhangbz.musicplayer; import java.io.File; import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast; public class MainActivity extends Activity { private EditText et_path;
private MediaPlayer mediaPlayer;
private Button bt_play, bt_pause, bt_stop, bt_replay; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); et_path = (EditText) findViewById(R.id.et_path);
bt_play = (Button) findViewById(R.id.bt_play);
bt_pause = (Button) findViewById(R.id.bt_pause);
bt_replay = (Button) findViewById(R.id.bt_replay);
bt_stop = (Button) findViewById(R.id.bt_stop);
}
/**
* 播放
* @param view
*/
public void play(View view) {
String filepath = et_path.getText().toString().trim();
File file = new File(filepath);
if(file.exists()) { try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(filepath);//设置播放的数据源
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.prepare();//准备开始播放,播放的逻辑是c代码在新的线程执行。
mediaPlayer.start();
bt_play.setEnabled(false);
mediaPlayer.setOnCompletionListener(new OnCompletionListener() { public void onCompletion(MediaPlayer arg0) {
bt_play.setEnabled(true);
}
});
} catch (Exception e) {
Toast.makeText(this, "播放失败", 0).show();
e.printStackTrace();
}
} else {
Toast.makeText(this, "文件不存在，请检查文件路径", 0).show();
}
}
/**
* 暂停
* @param view
*/
public void pause(View view) {
if("继续".equals(bt_pause.getText().toString().trim())) {
mediaPlayer.start();
bt_pause.setText("暂停");
return;
}
if(mediaPlayer != null && mediaPlayer.isPlaying()) {
mediaPlayer.pause();
bt_pause.setText("继续");
}
}
/**
* 停止
* @param view
*/
public void stop(View view) {
if(mediaPlayer != null && mediaPlayer.isPlaying()) {
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
bt_pause.setText("暂停");
bt_play.setEnabled(true);
}
/**
* 重播
* @param view
*/
public void replay(View view) {
if(mediaPlayer != null && mediaPlayer.isPlaying()) {
mediaPlayer.seekTo(0);
} else {
play(view);
}
bt_replay.setText("暂停");
}
}