布局
<EditText
android:id="@+id/mediaFileName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="gangstabop.mp3">
<requestFocus />
</EditText>
<LinearLayout
android:id="@+id/linearButton"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/playButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="播放" />
<SeekBar
android:id="@+id/playSeekBar"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="3dp"
android:layout_marginTop="5dp"
android:layout_weight="1" />
<Button
android:id="@+id/replayButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="3dp"
android:text="重播" />
</LinearLayout>
代码
package test.com.mp3;
import android.content.Context;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.Toast;
import java.io.File;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;
public class MainActivity extends AppCompatActivity {
private MediaPlayer mediaPlayer;//媒体播放器
private Button playButton;
private Button replayButton;
private boolean isCellPlay;/*在挂断电话的时候,用于判断是否为是来电时中断*/
private boolean isSeekBarChanging;//互斥变量,防止进度条与定时器冲突。
private int currentPosition;//当前音乐播放的进度
private SeekBar seekBar;
private Timer timer;
private static final String TAG = "MediaActivity";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//实例化媒体播放器
mediaPlayer = new MediaPlayer();
//监听滚动条事件
seekBar = (SeekBar) findViewById(R.id.playSeekBar);
seekBar.setOnSeekBarChangeListener(new MySeekBar());
// 监听[播放或暂停]事件
playButton = (Button) findViewById(R.id.playButton);
playButton.setOnClickListener(new PalyListener());
//监听[重播]事件
replayButton = (Button) findViewById(R.id.replayButton);
replayButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
mediaPlayer.reset();
currentPosition = 0;
play();
}
});
//监听来电事件
TelephonyManager phoneyMana = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
phoneyMana.listen(new myPhoneStateListener(), PhoneStateListener.LISTEN_CALL_STATE);
}
/*销毁时释资源*/
@Override
protected void onDestroy() {
mediaPlayer.release();
timer.cancel();
timer = null;
mediaPlayer = null;
super.onDestroy();
}
/*播放或暂停事件处理*/
private class PalyListener implements View.OnClickListener {
public void onClick(View v) {
if (playButton.getText().toString().equals("暂停")) {
currentPosition = mediaPlayer.getCurrentPosition();//记录播放的位置
mediaPlayer.stop();//暂停状态
playButton.setText("播放");
timer.purge();//移除所有任务;
} else {
mediaPlayer.pause();
play();
}
}
}
/*播放处理*/
private void play() {
try {
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);//设置音频类型
mediaPlayer.setDataSource("http://file.kuyinyun.com/group1/M00/90/B7/rBBGdFPXJNeAM-nhABeMElAM6bY151.mp3");
mediaPlayer.prepareAsync();//数据缓冲
/*监听缓存 事件,在缓冲完毕后,开始播放*/
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
mp.start();
playButton.setText("暂停");
seekBar.setMax(mediaPlayer.getDuration());
if (currentPosition > 0)
mp.seekTo(currentPosition);
}
});
//监听播放时回调函数
timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
if (!isSeekBarChanging) {
seekBar.setProgress(mediaPlayer.getCurrentPosition());
}
}
}, 0, 50);
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "播放错误", Toast.LENGTH_LONG).show();
e.printStackTrace();
System.out.println(e);
}
}
/*来电事件处理*/
private class myPhoneStateListener extends PhoneStateListener {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
switch (state) {
case TelephonyManager.CALL_STATE_RINGING://来电,应当停止音乐
if (mediaPlayer.isPlaying() && playButton.getText().toString().equals("暂停")) {
currentPosition = mediaPlayer.getCurrentPosition();//记录播放的位置
mediaPlayer.stop();
isCellPlay = true;//标记这是属于来电时暂停的标记
playButton.setText("播放");
timer.purge();//移除定时器任务;
}
break;
case TelephonyManager.CALL_STATE_IDLE://无电话状态
if (isCellPlay) {
isCellPlay = false;
mediaPlayer.reset();
play();
}
break;
}
}
}
/*进度条处理*/
public class MySeekBar implements SeekBar.OnSeekBarChangeListener {
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// fromUser判断是用户改变的滑块的值
if (fromUser) {//<span style="color:#ff0000;"> 注意点</span>
try {
if (!mediaPlayer.isPlaying()) {
try {
mediaPlayer.reset();
mediaPlayer.setDataSource("http://file.kuyinyun.com/group1/M00/90/B7/rBBGdFPXJNeAM-nhABeMElAM6bY151.mp3");
mediaPlayer.prepareAsync();
// mPlayer.prepare();
mediaPlayer.start();
} catch (IllegalStateException | IOException e) {
e.printStackTrace();
}
}
mediaPlayer.seekTo(seekBar.getProgress());
} catch (IllegalStateException e) {
e.printStackTrace();
}
}
}
/*滚动时,应当暂停后台定时器*/
public void onStartTrackingTouch(SeekBar seekBar) {
isSeekBarChanging = true;
}
/*滑动结束后,重新设置值*/
public void onStopTrackingTouch(SeekBar seekBar) {
isSeekBarChanging = false;
mediaPlayer.seekTo(seekBar.getProgress());
}
}
}