Android使用init.rc触发脚本实现隐藏内置应用

【实现逻辑】

通过在property_service.c中设置标志位，在设置中实现接口改变标志位，

使用init.rc中声明的服务来侦听标志位的变化，显式启动声明的服务，执行对应的脚本，把应用后缀从apk重命名为bak，从而实现隐藏（显示逻辑相反）。

【实现步骤】以隐藏Google Play Store（system/priv-app/Phonesky.apk）为例：

1.首先在system/core/init/property_service.c中声明并初始化标志位，0为隐藏，1为显示，默认隐藏

     { "app.launcher.start", AID_SYSTEM, 0},
+   { "app.phonesky.show", AID_SYSTEM, 0}, //Add By zj
     { "cdma.",        AID_RADIO,    0 },    //Add by gfzhu VIA

2.在设置的开发者选项中实现对应的接口：

文件路径：packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java

①声明和初始化：

private static final String SHOW_PHONESKY = "show_phonesky";
private CheckBoxPreference mShowPhonesky;
mShowPhonesky = findAndInitCheckboxPref(SHOW_PHONESKY);

②CheckBox的逻辑：

       (BatteryManager.BATTERY_PLUGGED_AC | BatteryManager.BATTERY_PLUGGED_USB) : 0);
+      } else if (preference == mShowPhonesky) { // ZJ Add
+           if(mShowPhonesky.isChecked())
+           {
+              SystemProperties.set("app.phonesky.show","1");
+           }else{
+              SystemProperties.set("app.phonesky.show","0");
+           }
         } else if (preference == mBtHciSnoopLog) {

③增加一个Preference：

packages/apps/Settings/res/xml/development_prefs.xml

     android:targetClass="com.android.settings.SetFullBackupPassword" />
     </PreferenceScreen>
+       <CheckBoxPreference
+        android:key="show_phonesky"
+        android:title="@string/show_phonesky"
+        />
     <CheckBoxPreference 

④添加对应语言的string字符：

<string name="show_phonesky">Show Google Play Store</string>

⑤设置中新增一个监听，初始化Checkbox的逻辑：

packages/apps/Settings/src/com/android/settings/BootReceiver.java

内容如下：

package com.android.settings;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.SystemClock;
import android.util.Log;
import android.os.SystemProperties;

public class BootReceiver extends BroadcastReceiver{

     @Override
     public void onReceive(Context arg0, Intent arg1) {
          // TODO Auto-generated method stub

          String action = arg1.getAction();
          if(action.equals(Intent.ACTION_BOOT_COMPLETED))
          {
             SharedPreferences shared = arg0.getSharedPreferences("com.android.settings_preferences", Context.MODE_PRIVATE);
             boolean show_phonesky = shared.getBoolean("show_phonesky", false);
             if(show_phonesky){
                  SystemProperties.set("app.phonesky.show","1");
               }else{
                    SystemProperties.set("app.phonesky.show","0");
               }
          }
     }
}

⑥在Settings的AndroidManifest文件中添加BroadcastReceiver的权限和声明：

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<receiver android:name=".BootReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
               <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
</receiver>

3.在init.rc中添加对应的服务和触发条件：

路径：mediatek/config/esky27_tb_ccn_mlc_kk/init.rc

+# ZJ Add START
+#Hide or Show Google Play Dynamicly
+#disabled:服务不会自动运行，必须显式地通过服务器来启动。
+#oneshot:当此服务退出时不会自动重启。
+service hidePhonesky /system/bin/hidePhonesky
+       disabled
+       oneshot
+service showPhonesky /system/bin/showPhonesky
+       disabled
+       oneshot
+#on property:sys.boot_completed=1
+#   start renamePhonesky
+on property:app.phonesky.show=1
+   start showPhonesky
+on property:app.phonesky.show=0
+   start hidePhonesky
+# ZJ Add END

4.隐藏和显示应用的脚本：

隐藏应用：vendor/ThirdParty/App/dte/hidePhonesky

内容：

#!/system/bin/sh
#!/system/bin/busybox
mount -o remount,rw /system;
mv /system/priv-app/Phonesky.apk /system/priv-app/Phonesky.bak

显示应用：vendor/ThirdParty/App/dte/showPhonesky

内容：

#!/system/bin/sh
#!/system/bin/busybox
mount -o remount,rw /system;
mv /system/priv-app/Phonesky.bak /system/priv-app/Phonesky.apk

5.拷贝脚本到system/bin目录下：

参考以下格式添加到对应的mk文件：

+#添加重命名GooglePlay脚本
+PRODUCT_COPY_FILES += +       vendor/ThirdParty/App/dte/hidePhonesky:system/bin/hidePhonesky +       vendor/ThirdParty/App/dte/showPhonesky:system/bin/showPhonesky +       vendor/ThirdParty/App/dte/Phonesky.bak:system/priv-app/Phonesky.bak