Android 从按钮onClick获取TextView的值，并通过TextWatcher将值传递给TextView

我想让我的应用程序做的是计算平均值并在文本视图中显示它

我有一个包含两个按钮（按钮0和按钮1）和六个文本视图的布局。当我按下其中一个按钮时，我的应用程序会得到它被按下的点击次数，而另一个按钮也是如此。它还可以获得按下两个按钮的总点击次数。因此，如果我将点击次数除以按钮0被按下的次数，再乘以两个按钮被按下的总点击次数，我得到按钮被按下的点击百分比

这就是代码：

    Button button0, button1;
    int click_button0, click_button1;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.fragment_fragment1, container, false);

    final TextView times_0_tv = (TextView) view.findViewById(R.id.times_0);
    final TextView percentage_0_tv = (TextView) view.findViewById(R.id.percentage_0);
    final TextView times_1_tv = (TextView) view.findViewById(R.id.times_1);
    final TextView percentage_1_tv = (TextView) view.findViewById(R.id.percentage_1);
    final TextView total_clicks_tv = (TextView) view.findViewById(R.id.total_clicks);

    button0 = (Button) view.findViewById(R.id.button0);
    button1 = (Button) view.findViewById(R.id.button1);

    button0.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            click_button0 = click_button0 + 1;
            total_clicks = click_button0 + click_button1;
            total_clicks_tv.setText(String.valueOf(total_clicks));

            if (click_button0 == 1) {
                Toast.makeText(getActivity(), "Number 0 has apperared 1 time", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(getActivity(), "Number 0 has apperared " + click_button0 + " times", Toast.LENGTH_SHORT).show();
            }
            times_0_tv.setText(String.valueOf(click_button0));
            times_1_tv.setText(String.valueOf(click_button1));

        }
    });

    button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            click_button1 = click_button1 + 1;
            total_clicks = click_button0 + click_button1;
            total_clicks_tv.setText(String.valueOf(total_clicks));

            if (click_button1 == 1) {
                Toast.makeText(getActivity(), "Number 1 has apperared 1 time", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(getActivity(), "Number 1 has apperared " + click_button1 + " times", Toast.LENGTH_SHORT).show();
            }
            times_0_tv.setText(String.valueOf(click_button0));
            times_1_tv.setText(String.valueOf(click_button1));

        }
    });

    times_0_tv.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            String times0String = times_0_tv.getText().toString();
            String times1String = times_1_tv.getText().toString();
            String totaltimesString = total_clicks_tv.getText().toString();

            // convert the String into a double
            if (times0String.length() > 0) {
                click_button0 = (int) Double.parseDouble(times0String);
            }
            if (times1String.length() > 0) {
                click_button1 = (int) Double.parseDouble(times1String);
            }
            if (totaltimesString.length() > 0) {
                total_clicks = (int) Double.parseDouble(totaltimesString);
            }

            // calculate re
            double percent0calc = calc_percent0();

            // set the label for re1Text
            percentage_0_tv.setText(Double.toString(percent0calc));
        }
    });

    times_1_tv.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            String times0String = times_0_tv.getText().toString();
            String times1String = times_1_tv.getText().toString();
            String totaltimesString = total_clicks_tv.getText().toString();

            // convert the String into a double
            if (times0String.length() > 0) {
                click_button0 = (int) Double.parseDouble(times0String);
            }
            if (times1String.length() > 0) {
                click_button1 = (int) Double.parseDouble(times1String);
            }
            if (totaltimesString.length() > 0) {
                total_clicks = (int) Double.parseDouble(totaltimesString);
            }

            // calculate re
            double percent1calc = calc_percent1();

            // set the label for re1Text
            percentage_1_tv.setText(Double.toString(percent1calc));
        }
    });
}

double calc_percent0() {
    return click_button0/total_clicks;
}
double calc_percent1() {
    return click_button1/total_clicks;
}

以下是布局的屏幕截图：

当我按下一个按钮时，问题出现了，百分比为0%，它没有改变。例如，如果我按按钮0 3次，按按钮1 1 1次，0的百分比是75%，1的百分比是25%。欢迎任何意见，谢谢

编辑：我删除了TextWatcher的实现，并在代码中添加了一些行。当我点击button0时效果很好，因为它显示点击的百分比是100%，但当我点击button1时，两个百分比都变为0，我没有得到任何百分比。将总点击量的值传递给百分比计算时似乎出现了问题

下面是片段的代码：

Button button0, button1;
int click_button0, click_button1;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                     Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.fragment_fragment1, container, false);

final TextView times_0_tv = (TextView) view.findViewById(R.id.times_0);
    final TextView percentage_0_tv = (TextView) view.findViewById(R.id.percentage_0);
    final TextView times_1_tv = (TextView) view.findViewById(R.id.times_1);
    final TextView percentage_1_tv = (TextView) view.findViewById(R.id.percentage_1);
    final TextView total_clicks_tv = (TextView) view.findViewById(R.id.total_clicks);

    button0 = (Button) view.findViewById(R.id.button0);
    button1 = (Button) view.findViewById(R.id.button1);

    button0.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            click_button0 = click_button0 + 1;
            total_clicks = click_button0 + click_button1;
            total_clicks_tv.setText(String.valueOf(total_clicks));

            if (click_button0 == 1) {
                Toast.makeText(getActivity(), "Number 0 has apperared 1 time", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(getActivity(), "Number 0 has apperared " + click_button0 + " times", Toast.LENGTH_SHORT).show();
            }
            times_0_tv.setText(String.valueOf(click_button0));
            times_1_tv.setText(String.valueOf(click_button1));
            percent0 = click_button0/total_clicks;
            percentage_0_tv.setText(String.valueOf(percent0));
        }
    });

    button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            click_button1 = click_button1 + 1;
            total_clicks = click_button0 + click_button1;
            total_clicks_tv.setText(String.valueOf(total_clicks));

            if (click_button1 == 1) {
                Toast.makeText(getActivity(), "Number 1 has apperared 1 time", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(getActivity(), "Number 1 has apperared " + click_button1 + " times", Toast.LENGTH_SHORT).show();
            }
            times_0_tv.setText(String.valueOf(click_button0));
            times_1_tv.setText(String.valueOf(click_button1));
            percent1 = click_button1/total_clicks;
            percentage_1_tv.setText(String.valueOf(percent1));
        }
    });
}

---

为什么不在点击按钮时计算并设置百分比呢？您希望在单击按钮时更新百分比，因此逻辑应该在按钮OnClickListener中，而不是TextWatcher中

另外，不要从文本视图中获取值，而是使用已有的变量：

int click\u button0，click\u button1

使用变量值在onClick中进行计算，然后设置TextViews值，它应该按照预期工作

此外，如果您要尝试将字符串解析为数字double、int等，则应在出现异常时将其包围在try catch中。在这种情况下，您应该只使用Integer.parseInt，而不是使用parseDouble，然后将其强制转换为int

编辑：啊，是的，这是因为你将一个整数除以一个整数，因此结果也将是一个整数。一个快速解决方法是将其中一个数字转换为浮点/双精度，当你除以时，你将得到一个十进制数。
（（双击）按钮0）/总点击次数

您还应该同时更新这两个百分比，因为一个数字的变化会影响另一个。
谢谢您的回答，这非常有用。我已经用你的建议编辑了我的问题，但问题仍然存在。希望你有任何想法，谢谢！我编辑了我的答案，希望能对你的编辑有所帮助。非常感谢你，终于在你的帮助下得到了答案！