使用AIDL調用遠程服務設定系統時間，aidl調用系統

使用AIDL調用遠程服務設定系統時間，aidl調用系統

 

在實際工作中，經常遇到客戶需要用代碼設定系統時間的需求，但是Android非系統應用是無法設定系統時間的。於是，我設計了一個使用系統簽名的時間設定服務，客戶通過bind調用服務裡的方法就能達到設定時間的目的。

 

這裡用到的技術有：

1、Signapk簽名

2、AIDL

3、bind service

 

將應用變成系統應用

1、AndroidManifest.xml中加入android:sharedUserId="android.uid.system"

2、使用系統密鑰簽名。系統簽名在Android源碼目錄中的位置是"build\target\product\security"，下面的platform.pk8和platform.x509.pem兩個檔案。然後用Android提供的Signapk工具來簽名，signapk的原始碼是在"build\tools\signapk"下，用法為"signapk platform.x509.pem platform.pk8 input.apk output.apk"

 

時間設定服務 CustomServices

 

ICustomServices.aidl 裡定義了設定日期和設定時間方法

1 interface ICustomServices {2 3      void setDate(int year,int month,int day);4      void setTime(int hourOfDay, int minute);5 6 }

CustomService.Java   

 1 public class CustomService extends Service { 2     private static final String TAG = CustomService.class.getSimpleName(); 3  4     private MyBinder mBinder; 5  6     @Override 7     public void onCreate() { 8         super.onCreate(); 9 10         if (mBinder == null) {11             mBinder = new MyBinder();12         }13 14     }15 16 17     @Override18     public IBinder onBind(Intent intent) {19         return mBinder;20     }21 22 23     class MyBinder extends ICustomServices.Stub {24 25         @Override26         public void setDate(int year, int month, int day) throws RemoteException {27 28             setDate(CustomService.this, year, month - 1, day);29         }30 31         @Override32         public void setTime(int hourOfDay, int minute) throws RemoteException {33             setTime(CustomService.this, hourOfDay, minute);34         }35 36         void setDate(Context context, int year, int month, int day) {37             Calendar c = Calendar.getInstance();38 39             c.set(Calendar.YEAR, year);40             c.set(Calendar.MONTH, month);41             c.set(Calendar.DAY_OF_MONTH, day);42             long when = c.getTimeInMillis();43 44             if (when / 1000 < Integer.MAX_VALUE) {45                 ((AlarmManager) context.getSystemService(Context.ALARM_SERVICE)).setTime(when);46             }47         }48 49         void setTime(Context context, int hourOfDay, int minute) {50             Calendar c = Calendar.getInstance();51 52             c.set(Calendar.HOUR_OF_DAY, hourOfDay);53             c.set(Calendar.MINUTE, minute);54             c.set(Calendar.SECOND, 0);55             c.set(Calendar.MILLISECOND, 0);56             long when = c.getTimeInMillis();57 58             if (when / 1000 < Integer.MAX_VALUE) {59                 ((AlarmManager) context.getSystemService(Context.ALARM_SERVICE)).setTime(when);60             }61         }62     }63     64 }

 

 AndroidManifest.xml

 1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 3     package="com.rs.customservices" android:sharedUserId="android.uid.system"> 4     <application 5         android:allowBackup="true" 6         android:icon="@mipmap/ic_launcher" 7         android:label="@string/app_name" 8         android:supportsRtl="true" 9         android:theme="@style/AppTheme">10 11 12         <service13             android:name="com.rs.customservices.CustomService"14             android:enabled="true"15             android:exported="true">16             <intent-filter>17                 <action android:name="com.rs.CustomService" />18             </intent-filter>19         </service>20     </application>21 22 </manifest>

 

 

編譯完後使用系統簽名將APK檔案簽名成系統應用。

 

 

 客戶程式

 將上面工程中的 ICustomServices.aidl 拷入到客戶工程中，注意：包的目錄結構也需要拷入。

 

CustomServiceActivity.java

 1 public class CustomServiceActivity extends Activity { 2     private static  final String TAG="CustomServiceActivity"; 3  4     ICustomServices mCustomServices; 5     @Override 6     protected void onCreate(Bundle savedInstanceState) { 7         super.onCreate(savedInstanceState); 8         setContentView(R.layout.activity_custom_service); 9 10         Intent intentCust = new Intent();11         intentCust.setAction("com.rs.CustomService");12         //在5.0及以上版本必須要加上這個13         intentCust.setPackage("com.rs.customservices");14         bindService(intentCust, mServiceConnection, Context.BIND_AUTO_CREATE);15     }16 17     ServiceConnection mServiceConnection = new ServiceConnection() {18         @Override19         public void onServiceConnected(ComponentName componentName, IBinder iBinder) {20             mCustomServices = ICustomServices.Stub.asInterface(iBinder);21 22             Log.i(TAG,"mServiceConnection2 onServiceConnected");23 24 25             try {26                 mCustomServices.setDate(1999, 5,6);27                 mCustomServices.setTime(5,45);28             } catch (RemoteException e) {29                 e.printStackTrace();30             }31 32         }33 34         @Override35         public void onServiceDisconnected(ComponentName componentName) {36 37         }38     };39 40 41     @Override42     protected void onDestroy() {43         super.onDestroy();44         unbindService(mServiceConnection);45     }46 }