Button Click Event Not Performed

I have write the following code in the onCreate() method of Activity class Button btn=(Button)findViewById(R.id.button1); btn.setOnClickListener(new View.OnClickListener()

Solution 1:

try this

final Button backto_main = (Button) findViewById(R.id.back3x3); 
    backto_main.setOnClickListener(new View.OnClickListener() {
        publicvoidonClick(View view) {                 
            //add your code here..
            WindowManager.LayoutParams params = getWindow().getAttributes();
            params.screenBrightness = 0;
            getWindow().setAttributes(params);
            Toast.makeText(v.getContext(),"Button Clicked",Toast.LENGTH_LONG).show();
        }
    });

Solution 2:

My suggestion is

Make a function by moving the following codes :

privatevoiddoSth(){
     WindowManager.LayoutParams params = getWindow().getAttributes();
     params.screenBrightness = 0;
     getWindow().setAttributes(params);
     Toast.makeText(v.getContext(),"Button Clicked",Toast.LENGTH_LONG).show();
}

And instead of doing btn.performClick(); call the function doSth() in onCreate() .

and modify your onClickListener as :

btn.setOnClickListener(new View.OnClickListener()
        {
            public void onClick(View v) 
            {
                doSth();
            }
        });

This should solve your problem.

Solution 3:

Remove this line:

btn.performClick();