Android - How to remove View in Layout (View added dynamically)

Question

I get an message error - force close - when I effort remove view in RelativeLayout (dynamic). add view : (layout is relativelayout, Sunanim's extended View) ``` SunAnim rotateImg = new SunAnim(this); rotateImg.setTag("imgsun"); layout.addView(rotateImg); ``` remove view :(CloudAnim <=> SunAnim) ``` class CountDownRunner implements Runnable{ // @Override public void run() { while(!Thread.currentThread().isInterrupted()){ try { Thread.sleep(1000); delAnim ++; SunAnim rotateImg = (SunAnim)layout.findViewWithTag("imgsun"); CloundAnim cl = (CloundAnim)layout.findViewWithTag("imgcl"); if (rotateImg != null && delAnim == 15) { ((RelativeLayout)rotateImg.getParent()).removeView(rotateImg); layout.invalidate(); delAnim = 0; Log.d("Rotate","Deleted"); } if (cl != null && delAnim == 15) { ((RelativeLayout)cl.getParent()).removeView(cl); layout.invalidate(); delAnim = 0; Log.d("CL","Deleted"); } } catch (InterruptedException e) { Thread.currentThread().interrupt(); }catch(Exception e){ } } } } ``…

Accepted Answer

You are trying to access a view from a thread other then ui thread. You better use a Handler implementation or simply use

```
layout.post(() -> layout.invalidate());
```

to perform view operation in ui thread.

For more details see, https://developer.android.com/guide/components/processes-and-threads

However, note that you cannot update the UI from any thread other than the UI thread or the "main" thread.

Android - How to remove View in Layout (View added dynamically)

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