如果要从service里向activity里发消息，要把handle定义为static这样不管在那里都能获取到了。
private void addTime(){
Timer timer = new Timer();
//放在计时器里是为了不断的获取进度
timer.schedule(new TimerTask() {
@Override
public void run() {
//总长度
int du = mediaPlayer.getDuration();
//当前进度
int oo = mediaPlayer.getCurrentPosition();
Message msg = MainActivity.handler.obtainMessage();
Bundle bundle = new Bundle();
bundle.putInt("du",du);
bundle.putInt("oo",oo);
msg.setData(bundle);
MainActivity.handler.sendMessage(msg);
}
//延迟，更新时间
}, 5, 500);
}
这里用到了这个计时器类，主要功能就是让这个每个多少秒刷新一次
package com.example.musicplay; public interface PlayInterface { void play(); void playContiue(); void pause(); //设置音乐播放的时间 void seekTo(int pross); }
package com.example.musicplay; import java.util.Timer; import java.util.TimerTask; import android.app.Service; import android.content.Intent; import android.media.MediaPlayer; import android.media.MediaPlayer.OnPreparedListener; import android.os.Binder; import android.os.Bundle; import android.os.IBinder; import android.os.Message; public class PlayService extends Service { private MediaPlayer mediaPlayer; @Override public IBinder onBind(Intent intent) { // TODO: Return the communication channel to the service. return new MusicBinder(); } class MusicBinder extends Binder implements PlayInterface{ @Override public void play() { // TODO Auto-generated method stub PlayService.this.play(); } @Override public void playContiue() { // TODO Auto-generated method stub PlayService.this.playContiue(); } @Override public void pause() { // TODO Auto-generated method stub PlayService.this.pause(); } @Override public void seekTo(int pross) { // TODO Auto-generated method stub PlayService.this.seekTo(pross); } } @Override public void onCreate() { mediaPlayer = new MediaPlayer(); } private void play(){ //重置 mediaPlayer.reset(); try { mediaPlayer.setDataSource("sdcard/Charlotte Perrelli - Hero.mp3"); //准备 mediaPlayer.prepare(); } catch (Exception e) { // TODO Auto-generated catcssh block e.printStackTrace(); } mediaPlayer.setOnPreparedListener(new OnPreparedListener() { //准备完毕此方法调用 @Override public void onPrepared(MediaPlayer arg0) { // TODO Auto-generated method stub mediaPlayer.start(); addTime(); } }); } private void playContiue(){ mediaPlayer.start(); } private void pause(){ mediaPlayer.pause(); } //用seekbar设置音乐的时间 private void seekTo(int pross){ mediaPlayer.seekTo(pross); } private void addTime(){ Timer timer = new Timer(); //放在计时器里是为了不断的获取进度 timer.schedule(new TimerTask() { @Override public void run() { //总长度 int du = mediaPlayer.getDuration(); //当前进度 int oo = mediaPlayer.getCurrentPosition(); Message msg = MainActivity.handler.obtainMessage(); Bundle bundle = new Bundle(); bundle.putInt("du",du); bundle.putInt("oo",oo); msg.setData(bundle); MainActivity.handler.sendMessage(msg); } //延迟，更新时间 }, 5, 500); } }
package com.example.musicplay; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.app.Activity; import android.content.ComponentName; import android.content.Intent; import android.content.ServiceConnection; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.SeekBar; import android.widget.TextView; import android.widget.SeekBar.OnSeekBarChangeListener; public class MainActivity extends Activity { private PlayInterface p; static Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { Bundle bundle = msg.getData(); int du = bundle.getInt("du"); int oo = bundle.getInt("oo"); sb.setMax(du); sb.setProgress(oo); int mmm = sb.getProgress() / 1000; int min = mmm / 60; int mm = mmm % 60; if (min == 0) { show.setText("" + mm); } else { show.setText(min + ":" + mm); } }; }; private static SeekBar sb; private static TextView show; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); sb = (SeekBar) findViewById(R.id.sb); show = (TextView) findViewById(R.id.show); Intent intent = new Intent(this, PlayService.class); startService(intent); bindService(intent, new Conn(), BIND_AUTO_CREATE); sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekbar) { // TODO Auto-generated method stub p.seekTo(seekbar.getProgress()); } @Override public void onStartTrackingTouch(SeekBar arg0) { // TODO Auto-generated method stub } @Override public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) { // TODO Auto-generated method stub } }); findViewById(R.id.paly).setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { p.play(); } }); findViewById(R.id.contiue).setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { p.playContiue(); } }); findViewById(R.id.pause).setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub p.pause(); } }); } class Conn implements ServiceConnection { @Override public void onServiceConnected(ComponentName arg0, IBinder arg1) { // TODO Auto-generated method stub p = (PlayInterface) arg1; } @Override public void onServiceDisconnected(ComponentName arg0) { // TODO Auto-generated method stub } } }
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <Button android:id="@+id/paly" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="开始播放" /> <Button android:id="@+id/contiue" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="继续播放" /> <Button android:id="@+id/pause" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="暂停播放" /> <SeekBar android:id="@+id/sb" android:layout_width="match_parent" android:layout_height="wrap_content" /> <TextView android:id="@+id/show" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout>