从Button onClick获取TextView的值，并通过TextWatcher将值传递给TextView

Question

我希望我的应用程序执行的是计算平均值并将其显示在TextView中。

我有两个按钮（button0和button1）和六个TextViews的布局。当我按下其中一个按钮时，我的应用程序将获得按下的点击次数以及与另一个按钮相同的次数。而且它还可以获得按下两个按钮的总点击次数。因此，如果我按点击次数来分按钮0，按下总点击次数，则按下两个按钮，然后将其乘以100，得到按下该按钮的百分比点击次数。

所以这是代码：

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; 
} 

这里是布局的截图：当我按下一个按钮，这个比例是0％

问题就来了，它不会改变。这个想法是，例如，如果我按下button0 3次，button1 1次，0的百分比是75％，1的百分比是25％。任何想法都会受到欢迎，谢谢！

编辑：我已经删除了TextWatcher的实现，并且我已经添加了一些代码行。当我单击button0时它工作正常，因为它显示点击百分比是100％，但是当我点击button1时，两个百分比都变为0，并且我没有得到任何百分比。将总点击的值传递给calc的百分比似乎存在问题。

这是现在的代码为片段：

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)); 
     } 
    }); 
} 

Answer 1

你为什么不只是计算并设置按钮的onClick的百分比是多少？您想要更新单击按钮时的百分比，因此逻辑应位于按钮OnClickListener内，而不是TextWatcher。

此外，而不是从你的TextViews得到的值，使用已有的变量：int click_button0, click_button1;

使用变量的值是否在onclick的计算，然后设置TextViews值和预期它应该工作。另外，如果你打算尝试和解析一个字符串作为数字double，int等，你应该把它包含在try catch中以防异常。在这种情况下，您应该使用Integer.parseInt而不是使用parseDouble，然后将其转换为int。

编辑：啊，这是因为你用int划分int，所以结果也是int。一个快速解决方案是将其中一个数字转换为浮点数/双精度数，并且当您分割时，您将得到一个十进制数。 ((double) click_button0)/total_clicks;

你也应该同时更新两个百分比，看看一个数字的变化会影响另一个。