幾句話：
1.此實(shí)例實(shí)際上就是一個(gè)求和計(jì)算器娶聘；
2.客戶端是位于前臺(tái)的Activity闻镶，用于數(shù)據(jù)的輸入輸出；
3.服務(wù)器端是在后臺(tái)的Service丸升，用于數(shù)據(jù)的計(jì)算铆农；
4.兩者處于不同的進(jìn)程中，通過AIDL進(jìn)行數(shù)據(jù)交流狡耻。
開始code：
1.首先創(chuàng)建AIDL：
在Android Studio的app層右鍵新建AIDL文件顿涣，命名為：ICalculate，此時(shí)會(huì)自動(dòng)生成aidl的包酝豪，包中有ICalculate.aidl文件涛碑。代碼如下：
// ICalculate.aidl
package com.example.ubuntu.aidlcalculatedemo;
// Declare any non-default types here with import statements
interface ICalculate {
/**
* Demonstrates some basic types that you can use as parameters
* and return values in AIDL.
*/
double doCalculate(double a,double b);
}
代碼很簡單，定義了一個(gè)方法doCalculate(double a , double b)孵淘。
- 創(chuàng)建后臺(tái)Service：
主要代碼是重寫doCalculate方法蒲障，并返回一個(gè)Binder對(duì)象給調(diào)用者，代碼如下：
package com.example.ubuntu.aidlcalculatedemo;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
public class CalculateService extends Service {
private ICalculate.Stub mBinder = new ICalculate.Stub() {
@Override
public double doCalculate(double a, double b) throws RemoteException {
double result = a + b;
return result;
}
};
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
}
- 主Activity的業(yè)務(wù)邏輯：
綁定服務(wù)瘫证，獲取到Binder對(duì)象揉阎，通過該對(duì)象來調(diào)用AIDL的方法doCalculate。代碼如下：
package com.example.ubuntu.aidlcalculatedemo;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.os.RemoteException;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private EditText num1, num2;
private TextView resultText;
private Button calculate;
private ICalculate iCalculate;
private ServiceConnection serviceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
iCalculate = ICalculate.Stub.asInterface(service);
}
@Override
public void onServiceDisconnected(ComponentName name) {
iCalculate = null;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
num1 = (EditText) findViewById(R.id.num1);
num2 = (EditText) findViewById(R.id.num2);
resultText = (TextView) findViewById(R.id.result_text);
calculate = (Button) findViewById(R.id.result);
Intent intent = new Intent(MainActivity.this, CalculateService.class);
bindService(intent, serviceConnection, BIND_AUTO_CREATE);
calculate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//點(diǎn)擊button背捌，隱藏軟鍵盤
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
double a = Double.parseDouble(num1.getText().toString());
double b = Double.parseDouble(num2.getText().toString());
try {
double result = iCalculate.doCalculate(a, b);//調(diào)用接口
resultText.setText("計(jì)算結(jié)果：" + result);
} catch (RemoteException e) {
e.printStackTrace();
}
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
unbindService(serviceConnection);
}
}
最后毙籽，Manifest.xml文件中按如下配置：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.ubuntu.aidlcalculatedemo" >
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<activity android:name=".MainActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".CalculateService"
android:process=":service"/><!-- 將service放到新的進(jìn)程中-->
</application>
</manifest>
這樣我們就完成了跨進(jìn)程調(diào)用，收工毡庆！效果圖如下：
Screenshot_20170821-160126.png
