How to solve error: Could not find method onClick(View) in a parent or ancestor Context for android:onClick

Question

I have seen that there\'s been some similar questions but the answers to those haven\'t helped me so far. The full error:

java.lang.IllegalStateExcept

Answer 1

You need to change android.support.v7.widget.AppCompatButton

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.AppCompatButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Random Game"
        android:id="@+id/button_random"
        android:layout_gravity="center_horizontal"
        android:onClick="onClick" />
</LinearLayout>

Answer 2

I had the same issue, in my case I have 2 activities using the same layout so when I changed the OnClick event name it will crash in other activity try to check the setContentView layout in the crashing activity

Answer 3

Please rename onClick method to anything other than that, Android thinks you are calling the internal onClick from View.java exposed via OnClickListener interface

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Random Game"
    android:id="@+id/button_random"
    android:layout_gravity="center_horizontal"
    android:onClick="myOnClick" />

and in your Activity

public class StartActivity extends AppCompatActivity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_start);
        }

        public void myOnClick(View v) {
          Log.d("DEBUG", "CLICKED " + v.getId());
        }
}

You can check the View documentation here

Answer 4

I had the same problem and in my case, I changed Button in XML to android.support.v7.widget.AppCompatButton and it worked.

Code with Error:

 <Button
        .... />

Fixed Code:

 <android.support.v7.widget.AppCompatButton
        .... />

Answer 5

In my case I missed closing bracket at the end.

android:onClick="@{(v) -> CommentHandler.selectGallery(v)".

It should be like this.
        android:onClick="@{(v) -> CommentHandler.selectGallery(v)}".