1.系統app
系統app的權限默認開啓,大家應該都知道是修改DefaultPermissionGrantPolicy.java。
frameworks/base/services/core/java/com/android/server/pm/DefaultPermissionGrantPolicy.java
在grantDefaultSystemHandlerPermissions中可以看到
// Camera
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
PackageParser.Package cameraPackage = getDefaultSystemHandlerActivityPackageLPr(
cameraIntent, userId);
if (cameraPackage != null
&& doesPackageSupportRuntimePermissions(cameraPackage)) {
grantRuntimePermissionsLPw(cameraPackage, CAMERA_PERMISSIONS, userId);
grantRuntimePermissionsLPw(cameraPackage, MICROPHONE_PERMISSIONS, userId);
grantRuntimePermissionsLPw(cameraPackage, STORAGE_PERMISSIONS, userId);
}
從上面這段代碼就可以看到Camera中默認打開了CAMERA_PERMISSIONS, MICROPHONE_PERMISSIONS, STORAGE_PERMISSIONS這三個Dangerous Permission。
2.第三方app
手動安裝的第三方app的權限默認開啓是修改PackageManagerService.java。
frameworks/base/services/core/java/com/android/server/pm/PackageManagerService.java
在grantPermissionsLpw函數中添加如下代碼
//Permissions for com.xxx.xxx
if(pkg.packageName.contains("com.xxx.xxx")) {
final int permsSize = pkg.requestedPermissions.size();
for (int i=0; i<permsSize; i++) {
final String name = pkg.requestedPermissions.get(i);
final BasePermission bp = mSettings.mPermissions.get(name);
if(null != bp && permissionsState.grantInstallPermission(bp) != PermissionsState.PERMISSION_OPERATION_FAILURE) {
Slog.d(TAG, "zrx--- grant permission " + name + " to package " + pkg.packageName);
changedInstallPermission = true;
}
}
}
參考:
https://blog.csdn.net/u011280717/article/details/51819708
https://blog.csdn.net/fmc088/article/details/83063198