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前言第四步：你可以使用service进行方法调用，传输数据等。
一、 AIDL介绍
在Android中，每个应用（Application）执行在它自己的进程中，无法直接调用到其他应用的资源，这也符合“沙箱”的理念。所谓沙箱原理，一般来说用在移动电话业务中，简单地说旨在部分地或全部地隔离应用程序。关于沙箱技术我们这里就不多做介绍了，可以参看51CTO的这篇文章。<span style="font-family:Microsoft YaHei;font-size:18px;">package com.android.hellosumaidl;
// Interface declaration
interface IAdditionService {
// You can pass the value of in, out or inout
// The primitive types (int, boolean, etc) are only passed by in
int add(in int value1, in int value2);
}</span>一旦文件被保存，Android的AIDL工具会在gen/com/android/hellosumaidl这个文件夹里自动生成对应的<span style="font-family:Microsoft YaHei;font-size:14px;">package com.android.hellosumaidl;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
/*
* This class exposes the service to client
*/
public class AdditionService extends Service {
@Override
public void onCreate() {
super.onCreate();
}
@Override
public IBinder onBind(Intent intent) {
return new IAdditionService.Stub() {
/*
* Implement com.android.hellosumaidl.IAdditionService.add(int, int)
*/
@Override
public int add(int value1, int value2) throws RemoteException {
return value1 + value2;
}
};
}
@Override
public void onDestroy() {
super.onDestroy();
}</span><span style="font-family:Microsoft YaHei;font-size:14px;">/*
* This inner class is used to connect to the service
*/
class AdditionServiceConnection implements ServiceConnection {
public void onServiceConnected(ComponentName name, IBinder boundService) {
service = IAdditionService.Stub.asInterface((IBinder)boundService);
Toast.makeText(HelloSumAidlActivity.this, "Service connected", Toast.LENGTH_LONG).show();
}</span><pre name="code" class="java"><span style="font-family: 'Microsoft YaHei'; line-height: 1.6em;"> </span>
public void onServiceDisconnected(ComponentName name) { service = null; Toast.makeText(HelloSumAidlActivity.this, "Service disconnected", Toast.LENGTH_LONG).show(); }}
<span style="font-family:Microsoft YaHei;font-size:14px;">package com.android.hellosumaidl;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
public class HelloSumAidlActivity extends Activity {
IAdditionService service;
AdditionServiceConnection connection;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initService();
Button buttonCalc = (Button)findViewById(R.id.buttonCalc);
buttonCalc.setOnClickListener(new OnClickListener() {
TextView result = (TextView)findViewById(R.id.result);
EditText value1 = (EditText)findViewById(R.id.value1);
EditText value2 = (EditText)findViewById(R.id.value2);
@Override
public void onClick(View v) {
int v1, v2, res = -1;
v1 = Integer.parseInt(value1.getText().toString());
v2 = Integer.parseInt(value2.getText().toString());
try {
res = service.add(v1, v2);
} catch (RemoteException e) {
e.printStackTrace();
}
result.setText(Integer.valueOf(res).toString());
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
releaseService();
}
/*
* This inner class is used to connect to the service
*/
class AdditionServiceConnection implements ServiceConnection {
public void onServiceConnected(ComponentName name, IBinder boundService) {
service = IAdditionService.Stub.asInterface((IBinder)boundService);
Toast.makeText(HelloSumAidlActivity.this, "Service connected", Toast.LENGTH_LONG).show();
}
public void onServiceDisconnected(ComponentName name) {
service = null;
Toast.makeText(HelloSumAidlActivity.this, "Service disconnected", Toast.LENGTH_LONG).show();
}
}
/*
* This function connects the Activity to the service
*/
private void initService() {
connection = new AdditionServiceConnection();
Intent i = new Intent();
i.setClassName("com.android.hellosumaidl", com.android.hellosumaidl.AdditionService.class.getName());
boolean ret = bindService(i, connection, Context.BIND_AUTO_CREATE);
}
/*
* This function disconnects the Activity from the service
*/
private void releaseService() {
unbindService(connection);
connection = null;
}
}</span>
Fig 1 : 填写数字前
Fig 2 : 按下计算按钮后
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原文地址：http://blog.csdn.net/baidu_34934230/article/details/51363857
