Question

当我点击添加按钮时，它会从0开始计算数字并一次又一次显示，但是当我点击时删除按钮它干净编辑文本，但当开始再次单击添加按钮时，它从它停止的最后一个数字开始计数，所以当我从（0）开始计数的每一次点击它时，我想要。

final Button add = (Button) findViewById(R.id.button1);
    final Button delet = (Button) findViewById(R.id.button2);
    final EditText edit = (EditText) findViewById(R.id.editText1);

    add.setOnClickListener(new View.OnClickListener() {

        private int number = 1;


        public void onClick(View v) {
            // TODO Auto-generated method stub
            // random = random();
            edit.setText("" + number++); // i want when i click on it in every single time it beginning to count from( 0 )
                               //because when i delete it and start to click again on add button it count from the last number that stop on it 


        }
    });
    delet.setOnClickListener(new View.OnClickListener() {

        private int numberr;

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            edit.setText("0");  // should i change this clean code to make it count from the beginning in every single click ?
        }
    });
}

Answer 1

您必须使数字变量为全局才能使代码正常运行。

单击按钮后，它将始终初始化为1.

    add.setOnClickListener(new View.OnClickListener() {


          // make it global or store in intent to retain its value after incrementing and intialize it globally and not here else again will be same case.
//            number = 1;


            public void onClick(View v) {
                // TODO Auto-generated method stub
                // random = random();
                edit.setText("" + number++); // i want when i click on it in every single time it beginning to count from( 0 )
                                   //because when i delete it and start to click again on add button it count from the last number that stop on it 


            }
        });

单击EditText中的按钮显示增加的数字。

1 个答案: