CODEWITHSUNDEEP
androidandroid-fragmentsandroid-imageview
FaisalAhmed
FaisalAhmed

Reputation: 3651

ImageView onClick effect in fragment

Please correct me where i am wrong . I am trying to show some click effect on imageview click but it is throwing nullpointer exception . where i am wrong in this code ? It is throwing null pointer exception at createAllImage()

Fragment Code

public class DuaFragment extends Fragment implements View.OnTouchListener {

    ImageView fear;

    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup  container, @Nullable Bundle savedInstanceState) {
        View view= inflater.inflate(R.layout.dua_fragment,container,false);
        return view;
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        createAllImage();
    }

    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
        switch (motionEvent.getAction()) {
            case MotionEvent.ACTION_DOWN:
                fear.getDrawable().setColorFilter(0x77000000, PorterDuff.Mode.SRC_ATOP);
                fear.invalidate();
                break;
            case MotionEvent.ACTION_UP:
                fear.getDrawable().clearColorFilter();
                fear.invalidate();
                break;
        }
        return true;
    }

    void createAllImage() {
        fear=(ImageView)getView().findViewById(R.id.fear);
        fear.setOnTouchListener(this);
    }
}

My layout file

<ImageView
    android:id="@+id/fear"
    style="@style/icon"
    android:background="@drawable/fear_96" />

Upvotes: 0

Views: 560

Answers (1)

guipivoto
guipivoto

Reputation: 18687

As you mentioned, fear.getDrawable() is returning null.

So, we have two solutions.. Need to test:

Solution 1

fear.getDrawable() is null because you set the picture as android:background.

I created this fixed based in here and here

So, change your ImageView as follows:

<ImageView
    android:id="@+id/fear"
    style="@style/icon"
    android:src="@drawable/fear_96"
    android:scaleType="fitXY"       />

Solution 2

If you want to keep android:background in ImageView Layout file, try to get the drawable as follows:

fear.getBackgroundDrawable();

Upvotes: 1

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