android overlay 权限,android – Settings.canDrawOverlays即使在从设置中启用权限后返回false...

我正在尝试从this回答浪潮代码检查是否启用了权限.但即使从设置启用了权限,它也会返回false.

public static boolean canDrawOverlayViews(Context con){

if(Build.VERSION.SDK_INT< Build.VERSION_CODES.LOLLIPOP){return true;}

try {

return Settings.canDrawOverlays(con);

}

catch(NoSuchMethodError e){

return canDrawOverlaysUsingReflection(con);

}

}

public static boolean canDrawOverlaysUsingReflection(Context context) {

try {

AppOpsManager manager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);

Class clazz = AppOpsManager.class;

Method dispatchMethod = clazz.getMethod("checkOp", new Class[] { int.class, int.class, String.class });

//AppOpsManager.OP_SYSTEM_ALERT_WINDOW = 24

int mode = (Integer) dispatchMethod.invoke(manager, new Object[] { 24, Binder.getCallingUid(), context.getApplicationContext().getPackageName() });

return AppOpsManager.MODE_ALLOWED == mode;

} catch (Exception e) { return false; }

}

解决方法:

public boolean getWindoOverLayAddedOrNot2() {

String sClassName = "android.provider.Settings";

try {

Class classToInvestigate = Class.forName(sClassName);

if (context == null)

context = activity;

Method method = classToInvestigate.getDeclaredMethod("isCallingPackageAllowedToDrawOverlays", Context.class, int.class, String.class, boolean.class);

Object value = method.invoke(null, context, Process.myUid(), context.getPackageName(), false);

Log.i("Tag", value.toString());

// Dynamically do stuff with this class

// List constructors, fields, methods, etc.

} catch (ClassNotFoundException e) {

// Class not found!

} catch (Exception e) {

// Unknown exception

e.printStackTrace();

}

return false;

}

标签：android,overlay,system-alert-window

来源： https://codeday.me/bug/20190828/1755847.html

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