应用程序获取冻结白色设置双值以使用打字机编辑文本以进行 2 编辑文本

Posted 2023-04-14

【中文标题】应用程序获取冻结白色设置双值以使用打字机编辑文本以进行 2 编辑文本

【英文标题】：Application get freeze whete set double value to edit text using typewriter for 2 edit text

【发布时间】：2017-10-22 11:43:36

【问题描述】：

我正在开发应用程序，我想将货币价值从一种更改为另一种，就像我有 2 个编辑文本一样。一个用于输入美元货币，另一个用于输入欧元货币。 现在我想在 1 个编辑文本中输入值，计算出的值应该显示在其他编辑文本框中。

 TextWatcher inputTextWatcher = new TextWatcher()
    
        public void afterTextChanged(Editable s) 
         

            try  
                Start_Calculate(""+s.toString());
                 
                 catch (NumberFormatException nfe) 
                 //or whatever exception you get
                
                      //do some handling if you need to



        
        public void beforeTextChanged(CharSequence s, int start, int count, int after)
        

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

        
    ;

    amountET.addTextChangedListener(inputTextWatcher);


    TextWatcher inputTextWatcher1 = new TextWatcher() 
        public void afterTextChanged(Editable s) 
         


            try  
                Start_Calculate2(""+s.toString());
                 
                 catch (NumberFormatException nfe) 
                 //or whatever exception you get
                

        
        public void beforeTextChanged(CharSequence s, int start, int count, int after)
        
        public void onTextChanged(CharSequence s, int start, int before, int count) 
        
    ;

    amount2ET.addTextChangedListener(inputTextWatcher1);

功能在这里：

   public void Start_Calculate(String val)


        String user_input_value="00.00";

    try
    
    // user_input_value=""+amountET.getText().toString();
         user_input_value=""+val;
    
    catch(NumberFormatException e)
    
        user_input_value="00.00";
    
    //*/

    if(!user_input_value.equalsIgnoreCase(""))
    

    if(user_input_value.length()<11)
    
        try
        
            user_amount=Double.parseDouble(""+user_input_value);
        
        catch(NumberFormatException e)
        
            user_amount=00.000;
        



        if(user_amount>0)
        

            user_amount=user_amount*1.0000001;
            total_amount_to_send=((user_amount*to_amount_val)/from_amount_val);
        //  total_amount_to_send=   total_amount_to_send+00.0000;
            //String total=new DecimalFormat("##.##").format(total_amount_to_send);
         //  totalTV.setText(user_amount+" "+fromTV.getText().toString()+" = "+ total+" ("+toTV.getText().toString()+")");
            // totalTV.setText(user_amount+" = "+ total);


            //  String finalVal= df.format(target_currency_val);

            //total_calTV.setText("( "+user_amount+" × "+df.format(to_amount_val) +" = "+ total+" )");

             String total="00.00";
             DecimalFormat df = new DecimalFormat("#.####");
             total=""+df.format(total_amount_to_send);

             try
             
            amount2ET.setText(""+total);//_amount_to_send+"");
             
             catch(Exception e) 
              
                Log.e("Error in Calculate1: ",""+e.getMessage());
                

            //showtoast(""+total);//_amount_to_send);

            //usdTV.setText(""+user_amount+" ("+fromTV.getText().toString()+")");
            //pkrTV.setText(""+ total+" ("+toTV.getText().toString()+")");


        
        else
        


        
    
    else
    

    

    



public void Start_Calculate2(String val)


        //String user_input_value="0";
    //String user_input_value=""+val;
    String user_input_value="0";

    try
    
     //user_input_value=""+amount2ET.getText().toString();
        user_input_value=val;
    
    catch(NumberFormatException e)
    
        user_input_value="00.00";
    
    //*/
    if(!user_input_value.equalsIgnoreCase(""))
    

    if(user_input_value.length()<11)
    
        try
        
            user_amount=Double.parseDouble(""+user_input_value);
        
        catch(NumberFormatException e)
        
            user_amount=00.00;
        

        if(user_amount>0)
        

            user_amount=user_amount*1.0000001;

            total_amount_to_send=((user_amount*from_amount_val)/to_amount_val);
        //  total_amount_to_send=   total_amount_to_send+00.0000;
            //String total=new DecimalFormat("##.##").format(total_amount_to_send);
           // totalTV.setText(user_amount+" "+toTV.getText().toString()+" = "+ total+" ("+fromTV.getText().toString()+")");

            // totalTV.setText(user_amount+" = "+ total);

              //DecimalFormat df = new DecimalFormat("#.##");
            //  String finalVal= df.format(target_currency_val);

            //total_calTV.setText("( "+user_amount+" × "+df.format(to_amount_val) +" = "+ total+" )");





            String total=new DecimalFormat("##.##").format(total_amount_to_send);

             try
             
             amountET.setText(""+total);//_amount_to_send);
             
             catch(Exception e) 
              
                Log.e("Error in Calculate-2: ",""+e.getMessage());
                

            //showtoast(""+total);//_amount_to_send);
            //usdTV.setText(""+user_amount+" ("+fromTV.getText().toString()+")");
            //pkrTV.setText(""+ total+" ("+toTV.getText().toString()+")");


        
        else
        
            //totalTV.setText("");
            //total_calTV.setText("");
        
    
    else
    
        //totalTV.setText("");
        //total_calTV.setText("");
    

    

【参考方案1】：

这是因为你得到了无限循环。

amount2ET.setText 将切换另一个“afterTextChanged”，让您重复调用 Start_Calculate。

你应该在设置文本之前移除监听器

 amountET.removeTextChangedListener(inputTextWatcher)

             try
             
             amountET.setText(""+total);//_amount_to_send);
             
             catch(Exception e) 
              
                Log.e("Error in Calculate-2: ",""+e.getMessage());
                

 amountET.addTextChangedListener(inputTextWatcher);

或者您可以在更新时将全局标志设置为 true，这样您就可以关闭另一个 Start_Calculate：

boolean updating = false;

public void afterTextChanged(Editable s) 
         

            try  
               if (!updating)
                Start_Calculate(""+s.toString());
                 
                 catch (NumberFormatException nfe) 
                 //or whatever exception you get
                
                      //do some handling if you need to



        

在 Start_Calculate 中：

updating = true;

         try
         
         amountET.setText(""+total);//_amount_to_send);
         
         catch(Exception e) 
          
            Log.e("Error in Calculate-2: ",""+e.getMessage());
            


updating = false;