Android系統應用預設許可權設定

frameworks/base/services/core/java/com/android/server/pm/DefaultPermissionGrantPolicy.java 類是對預設許可權管理類

我們可以通過此類來對我們系統中存在的應用進行預設許可權設定。 
下面舉個例子，修改系統中應用儲存空間許可權：

    private void grantDefaultSystemHandlerPermissions(int userId) {
        ...
        grantStoragePermissionsToCustomApp(userId)；// add 
        ...
    }

private void grantStoragePermissionsToCustomApp(int userId){
    final String []itemString = mService.mContext.getResources()
        .getStringArray(com.android.internal.R.array.storage_permission_custom_packagename);
    for (int i = 0; i < itemString.length; i++) {
        PackageParser.Package customPackage = getPackageLPr(itemString[i]);
        if ((customPackage != null) && doesPackageSupportRuntimePermissions(customPackage)) {
            grantRuntimePermissionsLPw(customPackage, STORAGE_PERMISSIONS, userId);
        }
    }
}
 

當然要通過一個xml檔案講我們需要預設開啟的應用羅列

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

<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">

<string-array name="storage_permission_custom_packagename" translatable="false">
    <item>com.mediatek.datatransfer</item>
    <item>com.android.defcontainer</item>
    <item>com.android.calendar</item>
    <item>com.mediatek.camera</item>
    <item>com.android.chrome</item>
    <item>com.android.deskclock</item>
    <item>com.android.contacts</item>
    <item>com.android.development</item>
    <item>com.android.email</item>
    <item>com.android.fmradio</item>
    <item>com.facebook.katana</item>
    <item>com.mediatek.filemanager</item>
    <item>com.android.gallery3d</item>
    <item>com.google.android.gm</item>
    <item>com.google.android.googlequicksearchbox</item>
    <item>com.google.android.music</item>
    <item>com.google.android.apps.maps</item>
    <item>com.android.mms</item>
    <item>com.cmcm.cmx.pagetwo</item>
    <item>com.android.dialer</item>
    <item>com.android.soundrecorder</item>
    <item>com.google.android.youtube</item>
    <item>com.android.htmlviewer</item>
    <item>com.android.launcher3</item>
    <item>com.mediatek.lbs.em2.ui</item>
    <item>com.mediatek.wifitest</item>
    <item>com.mediatek.calendarimporter</item>
    <item>com.adups.fota</item>
    <item>com.android.sharedstoragebackup</item>
    <item>com.android.wallpapercropper</item>
    <item>com.android.dreams.phototable</item>
    <item>com.android.inputmethod.latin</item>
    <item>com.android.exchange</item>
    <item>com.android.providers.calendar</item>
    <item>com.mediatek.dataprotection</item>
    <item>com.mediatek.flp.em</item>
    <item>com.google.android.gms</item>
    <item>com.whatsapp</item>
    <item>com.android.browser</item>
</string-array>