如何禁用警报对话框关闭，如果在警报对话框中的editText为空

-1

我想禁用警报对话框关闭，如果TextView是空的，我经历了几个帖子，但没有他们是自定义警报对话框。如何解决这个问题。由于提前 这里是我的代码示例定制警告对话框代码如何禁用警报对话框关闭，如果在警报对话框中的editText为空

 protected void showInputDialog() { 

    // get prompts.xml view 
    LayoutInflater layoutInflater = LayoutInflater.from(Nav_Settings.this); 
    View promptView = layoutInflater.inflate(R.layout.nav_settings_change_password, null); 
    final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(Nav_Settings.this); 
    alertDialogBuilder.setView(promptView); 
    alertDialogBuilder.setIcon(R.drawable.icon_secret); 

    alertDialogBuilder.setTitle("CHANGE PASSWORD"); 

    final EditText currentPassword = (EditText) promptView.findViewById(R.id.etCurrentPassword); 
    final EditText newPassword = (EditText) promptView.findViewById(R.id.etNewPassword); 
    final EditText confirmNewPassword = (EditText) promptView.findViewById(R.id.etConfirmNewPassword); 

    // setup a dialog window 
    alertDialogBuilder.setPositiveButton("Update Password", new DialogInterface.OnClickListener() { 
     public void onClick(DialogInterface dialog, int id) { 
      if (TextUtils.isEmpty(currentPassword.getText().toString().trim())) { 
       currentPassword.setError("should not be empty"); 
      } else if (TextUtils.isEmpty(newPassword.getText().toString().trim())) { 
       newPassword.setError("should not be empty"); 
      } else if (TextUtils.isEmpty(confirmNewPassword.getText().toString().trim())) { 
       confirmNewPassword.setError("should not be empty"); 
      } else if (newPassword.getText().toString().trim() != confirmNewPassword.getText().toString().trim()) { 
       confirmNewPassword.setError("new password not matching"); 
      } else if (currentPassword == newPassword) { 
       newPassword.setError("new password should not be current password"); 
      } else { 
       Toast.makeText(getApplicationContext(), currentPassword.getText().toString() + "\n" + newPassword.getText().toString() + "\n" + confirmNewPassword.getText().toString(), Toast.LENGTH_SHORT).show(); 

      } 
     } 
    }).setNegativeButton("Cancel", 
      new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialog, int id) { 
        dialog.cancel(); 
       } 
      }); 

    // create an alert dialog 
    AlertDialog alert = alertDialogBuilder.create(); 
    alert.show(); 
    alert.getButton(alert.BUTTON_NEGATIVE).setTextColor(getResources().getColor(R.color.colorPrimary)); 
    alert.getButton(alert.BUTTON_POSITIVE).setTextColor(getResources().getColor(R.color.colorPrimary)); 
    Typeface face = Typeface.createFromAsset(getAssets(), 
      "fonts/RobotoCondensed-Bold.ttf"); 
    alert.getButton(alert.BUTTON_POSITIVE).setTypeface(face); 
    alert.getButton(alert.BUTTON_NEGATIVE).setTypeface(face); 
}

来源

2017-04-04 Andi

你检查[这]（HTTP：//计算器。 com/questions/26086848/android-dont-dismiss-alertdialog-after-click-positivebutton） –

现在查看我的答案。 –

谢谢所有，我跟着@kishire Jethava的建议，为我工作 – Andi

最初将其设置为禁用：

Button button = alert.getButton(alert.BUTTON_NEGATIVE); 
button.setEnabled(false); 
alert.setCancelable(false);

添加TextWhatcher你的密码的EditText：

currentPassword.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) { 
      if(TextUtils.isEmpty(currentPassword.getText().toString().trim())){ 
       button.setEnabled(false); 
       alert.setCancelable(false); 
      } else{ 
       button.setEnabled(true); 
       alert.setCancelable(true); 
      } 
     } 

     @Override 
     public void afterTextChanged(Editable s) { 
     } 
    });

基本上，每次用户更改EditText中的文本，你都可以检查它是否为空&相应地启用/禁用“取消”按钮。

来源

2017-04-04 12:14:45

您可以在方法的顶部有一个布尔值，使其真正只有当所有的验证都被清除

protected void showInputDialog() { 

// get prompts.xml view 
LayoutInflater layoutInflater = LayoutInflater.from(Nav_Settings.this); 
View promptView = layoutInflater.inflate(R.layout.nav_settings_change_password, null); 
final boolean isCloseValid = false; // THIS BOOLEAN 
final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(Nav_Settings.this); 
alertDialogBuilder.setView(promptView); 
alertDialogBuilder.setIcon(R.drawable.icon_secret); 

alertDialogBuilder.setTitle("CHANGE PASSWORD"); 

final EditText currentPassword = (EditText) promptView.findViewById(R.id.etCurrentPassword); 
final EditText newPassword = (EditText) promptView.findViewById(R.id.etNewPassword); 
final EditText confirmNewPassword = (EditText) promptView.findViewById(R.id.etConfirmNewPassword); 

// setup a dialog window 
alertDialogBuilder.setPositiveButton("Update Password", new DialogInterface.OnClickListener() { 
    public void onClick(DialogInterface dialog, int id) { 
     if (TextUtils.isEmpty(currentPassword.getText().toString().trim())) { 
      currentPassword.setError("should not be empty"); 
isValidClose = false // VALIDATION FALSE 
     } else if (TextUtils.isEmpty(newPassword.getText().toString().trim())) { 
      newPassword.setError("should not be empty"); 
isValidClose = false // VALIDATION FALSE 
     } else if (TextUtils.isEmpty(confirmNewPassword.getText().toString().trim())) { 
      confirmNewPassword.setError("should not be empty"); 
isValidClose = false // VALIDATION FALSE 
     } else if (newPassword.getText().toString().trim() != confirmNewPassword.getText().toString().trim()) { 
      confirmNewPassword.setError("new password not matching"); 
isValidClose = false // VALIDATION FALSE 
     } else if (currentPassword == newPassword) { 
      newPassword.setError("new password should not be current password"); 
isValidClose = false // VALIDATION FALSE 
     } else { 
      Toast.makeText(getApplicationContext(), currentPassword.getText().toString() + "\n" + newPassword.getText().toString() + "\n" + confirmNewPassword.getText().toString(), Toast.LENGTH_SHORT).show(); 
isValidClose = true; // MAKE TRUE HERE 

     } 
    } 
}).setNegativeButton("Cancel", 
     new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog, int id) { 
      if(isValidClose){ // if validations is cleared 
       dialog.cancel(); 
       } 
      } 
     }); 

// create an alert dialog 
AlertDialog alert = alertDialogBuilder.create(); 
alert.show(); 
alert.getButton(alert.BUTTON_NEGATIVE).setTextColor(getResources().getColor(R.color.colorPrimary)); 
alert.getButton(alert.BUTTON_POSITIVE).setTextColor(getResources().getColor(R.color.colorPrimary)); 
Typeface face = Typeface.createFromAsset(getAssets(), 
     "fonts/RobotoCondensed-Bold.ttf"); 
alert.getButton(alert.BUTTON_POSITIVE).setTypeface(face); 
alert.getButton(alert.BUTTON_NEGATIVE).setTypeface(face);

}

来源

2017-04-04 12:18:01

如何禁用警报对话框关闭，如果在警报对话框中的editText为空

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