Android 修改源码，默认授予第三方APP权限，不用动态授权 |
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前言修改源码
前言
android 6.0 开始引入动态权限机制，某些敏感权限需要用户手动同意后才可以使用。 作为系统APP ，无需动态申请，声明后直接使用即可。 如果第三方APP需要默认拥有某些权限，无需动态申请，该怎么做呢？ 两种方法： 1.第三方APP打系统签名； 2.修改源码，默认授予第三方APP权限。 修改源码基于AN 8.0 ，默认权限的管理在 frameworks/base/services/core/java/com/android/server/pm/DefaultPermissionGrantPolicy.java 类，首次开机会执行，我们关注grantDefaultSystemHandlerPermissions(int userId) 函数， synchronized (mService.mPackages) { // Installer PackageParser.Package installerPackage = getSystemPackageLPr( mService.mRequiredInstallerPackage); if (installerPackage != null && doesPackageSupportRuntimePermissions(installerPackage)) { grantRuntimePermissionsLPw(installerPackage, STORAGE_PERMISSIONS, true, userId); } // Verifier PackageParser.Package verifierPackage = getSystemPackageLPr( mService.mRequiredVerifierPackage); if (verifierPackage != null && doesPackageSupportRuntimePermissions(verifierPackage)) { grantRuntimePermissionsLPw(verifierPackage, STORAGE_PERMISSIONS, true, userId); grantRuntimePermissionsLPw(verifierPackage, PHONE_PERMISSIONS, false, userId); grantRuntimePermissionsLPw(verifierPackage, SMS_PERMISSIONS, false, userId); } // SetupWizard PackageParser.Package setupPackage = getSystemPackageLPr( mService.mSetupWizardPackage); if (setupPackage != null && doesPackageSupportRuntimePermissions(setupPackage)) { grantRuntimePermissionsLPw(setupPackage, PHONE_PERMISSIONS, userId); grantRuntimePermissionsLPw(setupPackage, CONTACTS_PERMISSIONS, userId); grantRuntimePermissionsLPw(setupPackage, LOCATION_PERMISSIONS, userId); grantRuntimePermissionsLPw(setupPackage, CAMERA_PERMISSIONS, userId); } // 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); } //省略部分代码 mService.mSettings.onDefaultRuntimePermissionsGrantedLPr(userId); }以 Camera 为例，通过 grantRuntimePermissionsLPw 函数授予其相关的权限，权限的定义为 private static final Set MICROPHONE_PERMISSIONS = new ArraySet(); static { MICROPHONE_PERMISSIONS.add(Manifest.permission.RECORD_AUDIO); } private static final Set CAMERA_PERMISSIONS = new ArraySet(); static { CAMERA_PERMISSIONS.add(Manifest.permission.CAMERA); } private static final Set STORAGE_PERMISSIONS = new ArraySet(); static { STORAGE_PERMISSIONS.add(Manifest.permission.READ_EXTERNAL_STORAGE); STORAGE_PERMISSIONS.add(Manifest.permission.WRITE_EXTERNAL_STORAGE); }如此，参考 Camera ，给第三方应用授予相关权限： private static final String MYAPPE_PKG_NAME= "com.myapp.test"; // test app PackageParser.Package myAppPackage = getPackageLPr(MYAPPE_PKG_NAME); if(null != fxHomePackage && doesPackageSupportRuntimePermissions(MYAPPE_PKG_NAME)){ grantRuntimePermissionsLPw(myAppPackage , CAMERA_PERMISSIONS, userId); grantRuntimePermissionsLPw(myAppPackage , CONTACTS_PERMISSIONS, userId); grantRuntimePermissionsLPw(myAppPackage , LOCATION_PERMISSIONS, userId); grantRuntimePermissionsLPw(myAppPackage , MICROPHONE_PERMISSIONS, userId); grantRuntimePermissionsLPw(myAppPackage , STORAGE_PERMISSIONS, userId); Log.d(TAG, "Granting permissions to package com.bestv.ott"); }烧录后查看 /data/system/users/0/runtime-permissions.xml 文件， 通过包名查找 应用的权限授予情况， 当然，代码逻辑及功能检查更稳妥。 参考：https://blog.csdn.net/fmc088/article/details/81050520 |
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