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