我有一个设备管理员应用程序,它使用以下device-admin.xml
<device-admin xmlns:android="http://schemas.android.com/apk/res/android">
<uses-policies>
<watch-login />
<reset-password />
<force-lock />
<wipe-data />
</uses-policies>
</device-admin>
某些用户已经激活了设备管理员权限。现在,在更新应用程序时,我想添加一个新的使用策略
<limit-password />
我想知道如何检测已经以编程方式添加了新的使用策略,以便我们推动重新激活设备管理员权限?
答案 0 :(得分:1)
AFAIK唯一的方法是从你的apk中读取你的device-admin.xml,你可以这样做(来自一个Activity):
PackageManager packageManager = getPackageManager();
List <PackageInfo> packageInfoList = packageManager.getInstalledPackages(0);
for (PackageInfo packageInfo : packageInfoList) {
String publicSourceDir = packageInfo.applicationInfo.publicSourceDir;
if (publicSourceDir.contains("your/app/path")) { // or equals, which you prefer
File apkFile = new File(publicSourceDir);
if (apkFile.exists()) {
try {
JarFile jarFile = new JarFile(apkFile);
JarEntry jarEntry = jarFile.getJarEntry("xml/device-admin.xml");
InputStream is = jarFile.getInputStream(jarEntry);
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String str;
while ((str = br.readLine()) != null) {
Log.d("entry: ", str); // your entries in the device-admin.xml
}
} catch (IOException e) {
e.printStackTrace();
}
}
break;
}
}
答案 1 :(得分:0)
要检查您的活动管理员是否已授予政策,您可以使用 https://developer.android.com/reference/android/app/admin/DevicePolicyManager#hasGrantedPolicy(android.content.ComponentName,%20int)
要验证我喜欢使用的device-admin.xml中的使用策略
https://developer.android.google.cn/reference/android/app/admin/DeviceAdminInfo.html?hl=zh-cn#usesPolicy(int)
但是当usesPolicy
返回true
时,它并不代表主动管理员可以使用它。
ComponentName componentName = new ComponentName(context, MyDeviceAdminReceiver.class);
ResolveInfo resolveInfo = new ResolveInfo();
resolveInfo.activityInfo = context.getPackageManager().getReceiverInfo(componentName, PackageManager.GET_META_DATA);
DeviceAdminInfo info = new DeviceAdminInfo(context, resolveInfo);
if (info.usesPolicy(DeviceAdminInfo.USES_POLICY_LIMIT_PASSWORD)) {
//your application declared <limit-password/> in device_admin.xml
}
DevicePolicyManager dpm = (DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);
if (dpm.hasGrantedPolicy(componentName, DeviceAdminInfo.USES_POLICY_LIMIT_PASSWORD)) {
//active device admin has granted <limit-password/> policy
}