Go语言视频零基础入门到精通

jjuiwe

给大家发个最写的一个例子  帖子有点长，但内容并不是很多  




包含一着歌，所以文件比较大，5M多;


源码下载： 心灵僻处，如果您要查看本帖隐藏内容请回复

作个解释：
aidl = Android 接口，定义语言，用于远程通讯，我们只需要编写，.aidl文件，eclipse插件就会为我们生成相应的代码。
在要远程控制的service中创建一个该接口的对象,（）实现具体方法。

在service的onBind中将其返回。
@Override

public IBinder onBind(Intent intent) {

return stub;

}
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activy必需要和这个service绑定并在onServiceConnected 方法中获得接口对象实例

具体执行过程 是，activity通过，bindService(new Intent(Main.this,  
                LocalService.class), mConnection, Context.BIND_AUTO_CREATE);  和service绑定，会触发上面的代码，创建一个mConnection 对象。在onServiceConnected 中通过.Stub.asInterface(service);获得远程接口对象。之后就可以像使用本地对象一个使用远程对象mPlayer了。
IPlayer.aidl 源码
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service代码
package com.chonwhite.mplayer;



import java.io.IOException;



import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.app.Service;

import android.content.Intent;

import android.media.MediaPlayer;

import android.os.Binder;

import android.os.Handler;

import android.os.IBinder;

import android.os.Message;

import android.os.RemoteException;

import android.util.Log;

import android.widget.Toast;



public class LocalService extends Service {

private NotificationManager mNM;

private MediaPlayer mPlayer;

IPlayer.Stub stub = new IPlayer.Stub() {

@Override

public void play() throws RemoteException {

// TODO AutmPlayer.

mPlayer.start();



}



@Override

public void pause() throws RemoteException {

// TODO Auto-generated method stub

mPlayer.pause();

}



@Override

public void stop() throws RemoteException {

// TODO Auto-generated method stub

mPlayer.stop();

}



@Override

public int getDuration() throws RemoteException {

// TODO Auto-generated method stub

return mPlayer.getDuration();

}



@Override

public int getCurrentTime() throws RemoteException {

// TODO Auto-generated method stub

return mPlayer.getCurrentPosition();

}



@Override

public void setCurrent(int cur) throws RemoteException {

// TODO Auto-generated method stub

mPlayer.seekTo(cur);

}



@Override

public boolean isPlaying() throws RemoteException {

// TODO Auto-generated method stub

return mPlayer.isPlaying();

}

};

@Override

public void onCreate() {

mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

mPlayer = MediaPlayer.create(this, R.raw.mom);

mPlayer.start();





// Display a notification about us starting. We put an icon in the status bar.

showNotification();

}



@Override

public int onStartCommand(Intent intent, int flags, int startId) {

Log.i("LocalService", "Received start id " + startId + ": " + intent);

// We want this service to continue running until it is explicitly

// stopped, so return sticky.

return START_STICKY;

}



@Override

public void onDestroy() {

// Cancel the persistent notification.

mNM.cancel("ServiceStarted", 0);



// Tell the user we stopped.

Toast.makeText(this, "ServiceStoped", Toast.LENGTH_SHORT).show();

}

//当activity和service绑定时调用

@Override

public IBinder onBind(Intent intent) {

return stub;

}



/**

* Show a notification while this service is running.

*/

private void showNotification() {

// In this sample, we'll use the same text for the ticker and the expanded notification

CharSequence text = "LocalServiceStarted";



// Set the icon, scrolling text and timestamp

Notification notification = new Notification(R.drawable.icon, text,

System.currentTimeMillis());



// The PendingIntent to launch our activity if the user selects this notification

PendingIntent contentIntent = PendingIntent.getActivity(this, 0,

new Intent(this, Main.class), 0);



// Set the info for the views that show in the notification panel.

notification.setLatestEventInfo(this, "ServiceLable",

text, contentIntent);



// Send the notification.

// We use a layout id because it is a unique number. We use it later to cancel.

mNM.notify("LocalServiceStarted", 0, notification);

}



}
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Main Activy代码
package com.chonwhite.mplayer;





import android.app.Activity;

import android.app.AlertDialog;

import android.content.ComponentName;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.ServiceConnection;

import android.os.Bundle;

import android.os.Handler;

import android.os.IBinder;

import android.os.Message;

import android.os.RemoteException;

import android.util.Log;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.SeekBar;

import android.widget.SeekBar.OnSeekBarChangeListener;

import android.widget.TextView;

import android.widget.Toast;



public class Main extends Activity{



private IPlayer mPlayer;//代理播放器句柄

private SeekBar seekbar;

private TextView cur;//当前播放时间

private TextView dur;//歌曲总长度

private LrcSurfaceView mLrc ;

//handler负责管理线程

Handler mHandler = new Handler(){

@Override

public void handleMessage(Message msg) {

//cur.setText("当前播放时间" + msg.arg1);

};



};

//一个线程负责更新信息

private Runnable updateThread = new Runnable(){

@Override

public void run(){

Log.i("Thread","In RUN_____________>>>>>");



if (mPlayer!= null){//不执行null Check 会出现NullPointException

try {

int seconds = mPlayer.getCurrentTime() / 1000;

int minutes = seconds / 60;

seconds = seconds % 60;

cur.setText("当前播放时间" +minutes +":"+ seconds+ "播放状态"+ mPlayer.isPlaying());

dur.setText("歌曲总长度:" + mPlayer.getDuration());

//更新歌词时间

mLrc.timeUpdate(mPlayer.getCurrentTime(), mPlayer.getDuration());

//更新进度条

seekbar.setMax(mPlayer.getDuration());

seekbar.setProgress(mPlayer.getCurrentTime());



} catch (RemoteException e) {

// TODO Auto-generated catch block

Log.e("Error","Unable to get Time------------->>");

}

}

//cur.setText("In RUN");

mHandler.postDelayed(updateThread, 100);//将线程延迟加入handler处理

}

};



private ServiceConnection mConnection = new ServiceConnection() {

public void onServiceConnected(ComponentName className, IBinder service) {

mPlayer = IPlayer.Stub.asInterface(service);//后台播放器控制句柄

// Tell the user about this for our demo.

Toast.makeText(Main.this, "ServiceConnected",

Toast.LENGTH_SHORT).show();

}

public void onServiceDisconnected(ComponentName className) {

//mBoundService = null;

Toast.makeText(Main.this, "Serviedisconnected",

Toast.LENGTH_SHORT).show();

};

};

void doBindService() {

// Establish a connection with the service. We use an explicit

// class name because we want a specific service implementation that

// we know will be running in our own process (and thus won't be

// supporting component replacement by other applications).

bindService(new Intent(Main.this,

LocalService.class), mConnection, Context.BIND_AUTO_CREATE);

}



void doUnbindService() {

unbindService(mConnection);

}



@Override

protected void onDestroy() {

super.onDestroy();

doUnbindService();

};



/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

//大家都懂的

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Button play = (Button)findViewById(R.id.play);

Button pause = (Button)findViewById(R.id.pause);

Button stop = (Button)findViewById(R.id.stop);

mLrc = (LrcSurfaceView)findViewById(R.id.lrc);

seekbar = (SeekBar)findViewById(R.id.seekbar);

cur = (TextView)findViewById(R.id.current);

dur = (TextView)findViewById(R.id.duration);

//为进度条设置，监听器

seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener(){

@Override

public void onProgressChanged(SeekBar seekBar, int progress,

boolean fromUser) {

// TODO Auto-generated method stub

}

@Override

public void onStartTrackingTouch(SeekBar seekBar) {

// TODO Auto-generated method stub

}

@Override

public void onStopTrackingTouch(SeekBar seekBar) {

// TODO Auto-generated method stub

if(mPlayer!=null){

try {

mPlayer.setCurrent(seekbar.getProgress());

} catch (RemoteException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

});

//播放按钮监听器

play.setOnClickListener(new OnClickListener(){

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

try {

mPlayer.play();

//dur.setText("歌曲总长度" + mPlayer.getDuration());

} catch (RemoteException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

});

//暂停按钮

pause.setOnClickListener(new OnClickListener(){

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

try {

mPlayer.pause();

//cur.setText(mPlayer.getCurrentTime()+"");

} catch (RemoteException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

});

//停止按钮监听器

stop.setOnClickListener(new OnClickListener(){

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

try {

mPlayer.stop();

} catch (RemoteException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

});



bindService(new Intent(Main.this,

LocalService.class), mConnection, Context.BIND_AUTO_CREATE);

startService(new Intent(Main.this,

LocalService.class));

mHandler.post(updateThread);



}

//菜单，大家都懂的

public boolean onCreateOptionsMenu(Menu menu) {

menu.add(0, 1, 1, "以后再写");

menu.add(0, 2, 2, "退出");

return super.onCreateOptionsMenu(menu);

}

//处理菜单事件

public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {

case 1:



//startActivity(new Intent(Main.this,FileListActivity.class){

//});

break;

case 2:

//退出操作提示

AlertDialog.Builder builder2=new AlertDialog.Builder(this);

builder2.setIcon(R.drawable.alert_dialog_icon).setTitle("提示").setMessage("你确定要退出播放吗？").setPositiveButton("确定", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

doUnbindService();

stopService(new Intent(Main.this, LocalService.class));

finish();

}

}).setNegativeButton("取消", new DialogInterface.OnClickListener(){

public void onClick(DialogInterface dialog, int which) {

}

}).create().show();

break;

}

return super.onOptionsItemSelected(item);

}



}
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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

androidrientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<RelativeLayout

android:orientation="horizontal"

android:layout_width="match_parent"

android:layout_height="wrap_content"

>

<Button

android:id="@+id/play"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toLeftOf="@+id/pause"

android:text=&quotlay"

/>

<Button

android:id="@+id/pause"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerHorizontal="true"

android:text="Pause"

/>

<Button

android:id="@+id/stop"

android:layout_toRightOf="@+id/pause"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Stop"

/>

</RelativeLayout>



<TextView

android:id="@+id/current"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="current"

/>

<TextView

android:id="@+id/duration"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Duration"

/>

<SeekBar android:layout_marginTop="10px"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:id="@+id/seekbar"

/>

<com.chonwhite.mplayer.LrcSurfaceView

android:id="@+id/lrc"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_weight="1"

/>

</LinearLayout>
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manifest
<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.chonwhite.mplayer"

android:versionCode="1"

android:versionName="1.0">

<application android:icon="@drawable/icon" android:label="@string/app_name">

<activity android:name=".Main"

android:label="@string/app_name">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

<activity android:name=".FileListActivity"></activity>

<service android:name=".LocalService" ></service>



</application>







</manifest>
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njjwheu

rewrerewrewrewr

jjweji

太感谢了

8jnuj3

相当全面，且相当不错！！ verygood!

yweii

很不错！！！

jspfan

很强大! 楼主好样的!

aopre8

学习一下

aopre8

正好需要，多谢

小飞哥

找的很细辛苦呀

ksndfwjei

看看效果先啊