Android(安卓)给 app默认权限（不弹窗申请权限）

关于APK默认权限修改
1.系统签名应用
frameworks/base/services/core/java/com/android/server/pm/DefaultPermissionGrantPolicy.java
在grantDefaultSystemHandlerPermissions中修改

    // 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);    }//  feedback+            PackageParser.Package feedBackPackage = getPackageLPr("android.com.feedback");+            if (feedBackPackage != null+                    && doesPackageSupportRuntimePermissions(feedBackPackage)) {+                grantRuntimePermissionsLPw(feedBackPackage, STORAGE_PERMISSIONS, userId);+                grantRuntimePermissionsLPw(feedBackPackage, CAMERA_PERMISSIONS, userId);+            }

2.非系统签名应用，（手动安装以及v2签名应用）
frameworks/base/services/core/java/com/android/server/pm/PackageManagerService.java
在grantPermissionsLpw函数中添加如下代码

    //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;                  }              }          }

针对第一种修改,还有一种方法
1，需要新建一个以.xml结尾的XML文件，例如default-permissions.xml
2，这个文件的内容如下：

<?xml version='1.0' encoding='utf-8' standalone='yes' ?><exceptions>            <exception package="com.mediatek.filemanager">                  <permission name="android.permission.READ_EXTERNAL_STORAGE" fixed="true"/>                   <permission name="android.permission.WRITE_EXTERNAL_STORAGE" fixed="true"/>            </exception></exceptions>

3，将这个文件拷贝到system/etc/default-permissions/default-permissions.xml这个目录下。
4, 恢复出厂设置验证

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