Question

我一直在尝试使用两个OnClickListeners，但我无法弄清楚如何正确使用它。

有人可以帮我修改我的代码吗？

    btnClear.setOnClickListener(new View.OnClickListener() {
        public void onClick(View paramView) {

                                    numBase.getText().clear();
                                    numNikotin.getText().clear();

                                }

            btnAdd.setOnClickListener(new View.OnClickListener() { // I basically want this onClick Listener for the btnClear aswell, but I just cant get both to work. If I take away the btnClear setOnCLickListener Event then btnAdd works just fine.

                public void onClick(View v) {
                    num1 = Double.parseDouble(numBase.getText().toString());
                    num2 = Double.parseDouble(numNikotin.getText().toString());

                    sum = num1 / 20 * num2;
                    String resultN = String.format("%.2f%%", Double.toString(sum));
                    addResult.setText(resultN);

                    sum = num1 - sum;
                    String resultB = String.format("%.2f%%", Double.toString(sum));
                    addResult2.setText(resultB);
                }
            }
        });
    }
}

Answer 1

不，你不能那样做。只需将两个按钮之间的共享代码拆分为另一个方法，然后在两个侦听器内部调用。

private foo() {
     num1 = Double.parseDouble(numBase.getText().toString());
     num2 = Double.parseDouble(numNikotin.getText().toString());

     sum = num1 / 20 * num2;
     String resultN = String.format("%.2f%%", Double.toString(sum));
     addResult.setText(resultN);

     sum = num1 - sum;
     String resultB = String.format("%.2f%%", Double.toString(sum));
     addResult2.setText(resultB);
}


 btnClear.setOnClickListener(new View.OnClickListener() {
      public void onClick(View paramView) {
             numBase.getText().clear();
             numNikotin.getText().clear();
             foo();

     }
});


btnAdd.setOnClickListener(new View.OnClickListener() {
       public void onClick(View v) {
              foo();
       }
});

Answer 2

试试这个，

btnClear.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View view) {

                                numBase.getText().clear();
                                numNikotin.getText().clear(); 
                                btnAdd.performClick();
                            }
                        });

btnAdd.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View view) {
                                num1 = Double.parseDouble(numBase.getText().toString());
                num2 = Double.parseDouble(numNikotin.getText().toString());

                sum = num1 / 20 * num2;
                String resultN = String.format("%.2f%%", Double.toString(sum));
                addResult.setText(resultN);

                sum = num1 - sum;
                String resultB = String.format("%.2f%%", Double.toString(sum));
                addResult2.setText(resultB);
                            }
                        });

Answer 3

试试这个使用 performClick()

<强> public boolean performClick ()

在API级别1中添加

调用此视图的OnClickListener（如果已定义）。

调用此视图的OnClickListener（如果已定义）。执行与单击相关的所有正常操作：报告辅助功能事件，播放声音等

btnClear.setOnClickListener(new View.OnClickListener() {
                                @Override
                                public void onClick(View view) {
                                    btnAdd.performClick();
                                    numBase.getText().clear();
                                    numNikotin.getText().clear(); 
                                }
                            });

为btnAdd

创建单独的点击监听器

btnAdd.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            num1 = Double.parseDouble(numBase.getText().toString());
            num2 = Double.parseDouble(numNikotin.getText().toString());

            sum = num1 / 20 * num2;
            String resultN = String.format("%.2f%%", Double.toString(sum));
            addResult.setText(resultN);

            sum = num1 - sum;
            String resultB = String.format("%.2f%%", Double.toString(sum));
            addResult2.setText(resultB);
                        }
                    });

我不能使用两个OnClickListeners？

3 个答案: