EditText监听焦点

 numEdt.setOnFocusChangeListener(new android.view.View.OnFocusChangeListener() {
    
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
    
                Log.e("Edit", "焦点状态：" + hasFocus);
                if (hasFocus) {
    
                    //获取焦点
                    numDeleteIv.setVisibility(View.VISIBLE);
                } else {
    
                    //失去焦点
                    //处理我们的实际计算需求
                    numDeleteIv.setVisibility(View.GONE);
                }
            }
        });