Android view setVisibility():

Android view setVisibility():

有三個參數：Parameters: visibility One of VISIBLE , INVISIBLE , GONE，
對應的常量值：0、4、8

VISIBLE:0 意思是可見的
INVISIBILITY:4 意思是不可見的，但還佔著原來的空間
GONE:8 意思是不可見的，不佔用原來的佈局空間

View Code
 LinearLayout num_Layout = (LinearLayout) findViewById(R.id.num_layout);
  if (numberOfRecord > 0){
              TextView num = (TextView) findViewById(R.id.num);
              num.setText(numberOfRecord.toString() );
              num_Layout.setVisibility(0);
         }
else {
              num_Layout.setVisibility(8);
         }

Android Studio You can also reset/revoke a specific permissions using

Android Studio

You can also reset/revoke a specific permissions using

adb shell pm grant com.your.flashlight android.permission.CAMERA
adb shell pm revoke com.your.package android.permission.CAMERA

adb shell pm grant android.permission.CAMERA
adb shell pm reset-permissions

you should also add C:/android-sdk/platform-tools to you environment path

Flashlight App For Android

Flashlight App For Android

Google play>Flashlight App

Original design. A brand-new easy-to-use interface. Fast, bright, colorful, beautiful and featuring instant-on startup.
It has the standard lowest-permissions-needed and the standard ability to turn on your LED flash on the back of your phone.

LED flash
Interface color changes
Countdown
SOS flash

Thanks for all your feedback and support!