检查app是否具有推送权限

检查是否有推送权限

@RequiresApi(api = Build.VERSION_CODES.KITKAT)
 private boolean isNotificationEnabled(Context context) {

     String CHECK_OP_NO_THROW = "checkOpNoThrow";
     String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";

     AppOpsManager mAppOps = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
     ApplicationInfo appInfo = context.getApplicationInfo();
     String pkg = context.getApplicationContext().getPackageName();
     int uid = appInfo.uid;

     Class appOpsClass = null;
  /* Context.APP_OPS_MANAGER */
     try {
         appOpsClass = Class.forName(AppOpsManager.class.getName());
         Method checkOpNoThrowMethod = appOpsClass.getMethod(CHECK_OP_NO_THROW, Integer.TYPE, Integer.TYPE,
                 String.class);
         Field opPostNotificationValue = appOpsClass.getDeclaredField(OP_POST_NOTIFICATION);

         int value = (Integer) opPostNotificationValue.get(Integer.class);
         return ((Integer) checkOpNoThrowMethod.invoke(mAppOps, value, uid, pkg) == AppOpsManager.MODE_ALLOWED);

     } catch (Exception e) {
         e.printStackTrace();
     }
     return false;
 }

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private void toSetting() {  
    Intent localIntent = new Intent();  
    localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  
    if (Build.VERSION.SDK_INT >= 9) {  
        localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");  
        localIntent.setData(Uri.fromParts("package", getPackageName(), null));  
    } else if (Build.VERSION.SDK_INT <= 8) {  
        localIntent.setAction(Intent.ACTION_VIEW);  
        localIntent.setClassName("com.android.settings", "com.android.setting.InstalledAppDetails");  
        localIntent.putExtra("com.android.settings.ApplicationPkgName", getPackageName());  
    }  
    startActivity(localIntent);  
}