java.lang.NullPointerException: Attempt to invoke virtual method 'int android.widget.LinearLayout.getLeft()' on a null object reference

Question

i got this error when i tried to implement Circular Reveal Effect.
Does anyone have an idea?

private void ChooseFile() {

    int cx = (mRevealView.getLeft() + mRevealView.getRight());
        int cy = (mRevealView.getTop() + mRevealView.getBottom())/2;
   // int cy = mRevealView.getTop();

    int radius = Math.max(mRevealView.getWidth(), mRevealView.getHeight());

A question here in Stack Overflow wouldn't be complete without some code. — DaveNOTDavid, Jun 24 '17 at 13:39
A question here in Stack Overflow wouldn't be complete without a full logcat. — Phantômaxx, Jun 24 '17 at 13:44
thanks you DaveNOTDavid and Rotwang :) i am newbie i'll make some good questions in the futur — UsSf DeEm, Jun 25 '17 at 10:00

score 0 · Answer 1 · answered Jun 24 '17 at 14:01

0

mRevealView does not exist. Make sure you set mRevealView to have a value

answered Jun 24 '17 at 14:01

techfly

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thank you for help, i already set mRevealView in activity_chat and call it in ChatActivity – UsSf DeEm Jun 25 '17 at 09:52
the probleme is in getLeft the parameters of animation reveal – UsSf DeEm Jun 25 '17 at 09:55
You set `mRevealView` in another activity but in the current class it is not set. If you want to use the same instance, you need to pass it as a parameter to your current class/activity – techfly Jun 25 '17 at 14:16
thank you for your time bro :) i resolved it by puting compile ('com.github.ozodrukh:CircularReveal:1.1.1@aar') { transitive = true; } instead of : compile ('com.github.ozodrukh:CircularReveal:1.1.0') – UsSf DeEm Jun 25 '17 at 14:59

java.lang.NullPointerException: Attempt to invoke virtual method 'int android.widget.LinearLayout.getLeft()' on a null object reference

1 Answers1