更改文本時啓用和禁用按鈕

-2

我正在構建一個步行應用程序，用戶在撥號中設置其目標。我希望當用戶輸入超過閾值的目標時，啓動按鈕應該禁用，只要他改變目標，按鈕應該啓用。我試過，但即使我改變目標，按鈕被設置爲禁用。這是我的代碼。更改文本時啓用和禁用按鈕

free_walk_elapsed_time_distance.addTextChangedListener(new TextWatcher() { 

     @Override 
     public void afterTextChanged(Editable arg0) { 


     } 

     @Override 
     public void beforeTextChanged(CharSequence arg0, int arg1, 
             int arg2, int arg3) { 


     } 

     @Override 
     public void onTextChanged(CharSequence arg0, int start, int before, 
            int count) { 
      if (arg0.length() == 0) { 
       // No entered text so will show hint 
       free_walk_elapsed_time_distance.setTextSize(TypedValue.COMPLEX_UNIT_SP, mHintTextSize); 
      } else { 
       free_walk_elapsed_time_distance.setTextSize(TypedValue.COMPLEX_UNIT_SP, mRealTextSize); 
      } 
      if (arg0.length() > 0) { 
       // add toast message 
       if (targetType.equals(ParamConstants.FREE_WALK_TIMEBASEDWALK)) { 
        if (Integer.parseInt(getTargetString()) > 120) { 
         // startFreeWalk(); 
         Toast.makeText(getActivity(), "Please enter a target between 1 and 120 minutes", Toast.LENGTH_LONG).show(); 
        } 

       } 
       else{ 
        if(Integer.parseInt(getTargetString()) > 30) { 
         Toast.makeText(getActivity(), "Please enter a target between 1 and 30 kilometers", Toast.LENGTH_LONG).show(); 
         free_walk_start_btn.setClickable(false); 
         free_walk_start_btn.setBackgroundColor(Color.parseColor("#808080")); 
        } 

       } 
       mSeekArkfreeWalk.setProgress(Integer.parseInt("" + arg0)); 
       mSeekArkfreeWalkDistance.setProgress(Integer.parseInt("" + arg0)); 
      } 
     }

任何機構可以告訴我如何使它正確。

來源

2016-07-22 gaurav tiwari

'Button.setEnabled（假）;'應該做的伎倆。 – Vucko

可能重複的[Android：啓用按鈕的屬性不工作]（http://stackoverflow.com/questions/19705450/android-button-enabled-property-is-not-working） – ant

@vucko這將禁用按鈕，但我想在用戶設置有效目標時啓用。 –

free_walk_elapsed_time_distance.addTextChangedListener(new TextWatcher() { 
     @Override 
     public void onTextChanged(CharSequence s, int start, int before, int count) { 

      if (!s.toString().trim().equals("")) { 
      //write your code 

       myButton.setEnabled(false); 
      } else { 

      } 
     } 

     @Override 
     public void beforeTextChanged(CharSequence s, int start, int count, 
             int after) { 
     } 

     @Override 
     public void afterTextChanged(Editable s) { 
      myButton.setEnabled(true); 
     } 
    });

來源

2016-07-22 08:54:10

if (arg0.length() > 0) { 
        // add toast message 
        if (targetType.equals(ParamConstants.FREE_WALK_TIMEBASEDWALK)) { 
         if (Integer.parseInt(getTargetString()) > 120) { 
          // startFreeWalk(); 
          Toast.makeText(getActivity(), "Please enter a target between 1 and 120 minutes", Toast.LENGTH_LONG).show(); 
         }else{ 
          free_walk_start_btn.setClickable(true);//ENABLE 
BUTTON BACK 
    free_walk_start_btn.setEnable(true); 
        } 
        else{ 
         if(Integer.parseInt(getTargetString()) > 30) { 
          Toast.makeText(getActivity(), "Please enter a target between 1 and 30 kilometers", Toast.LENGTH_LONG).show(); 
          free_walk_start_btn.setClickable(false); 
          free_walk_start_btn.setBackgroundColor(Color.parseColor("#808080")); 
         } 

        } 
        mSeekArkfreeWalk.setProgress(Integer.parseInt("" + arg0)); 
        mSeekArkfreeWalkDistance.setProgress(Integer.parseInt("" + arg0)); 
       }

來源

2016-07-22 08:51:04

更改文本時啓用和禁用按鈕

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