android - 按肯定按钮为什么对话框关闭？

Question

实际上我正在检查我的对话框中的一些值，如果它们无效我不想关闭我的对话框。不幸的是默认情况下当我按下提交按钮时我的对话框被关闭 :( 我怎么能逃脱???

LayoutInflater factory = LayoutInflater.from(EmailJavaAPI.this);
final View textEntryView = factory.inflate(R.layout.usrpwsdialog,null);
((EditText)textEntryView.findViewById(R.id.etxtUserName)).setText((((EditText)findViewById(R.id.editTextFrom)).getText()).toString());

final EditText usrName = (EditText)textEntryView.findViewById(R.id.etxtUserName);
final EditText usrPws = (EditText)textEntryView.findViewById(R.id.etxtPws);

//AlertDialog alert=new AlertDialog(EmailJavaAPI.this);


return new AlertDialog.Builder(EmailJavaAPI.this)
    .setTitle(R.string.kpsdomain)
    .setView(textEntryView)
    .setPositiveButton(R.string.dgbtnsubmit,
        new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog,
                int whichButton) {
                      userName = usrName.getText().toString().trim();
                      userPws = usrPws.getText().toString().trim();
                      ((EditText)findViewById(R.id.editTextFrom)).setText(userName);

                      if(userName.equals("")){
                              textEntryView.findViewById(R.id.txtVWRUserName).setVisibility(View.VISIBLE);
                      }
                                      if(userPws.equals("")){
                                          textEntryView.findViewById(R.id.txtVWRPws).setVisibility(View.VISIBLE);
                                      }
                                      if(!userName.equals("")&& !userPws.equals("")){
                                          Toast.makeText(EmailJavaAPI.this, "User Name and Password has been set up", Toast.LENGTH_SHORT).show();
                                      }
                                      else{
                                          //***IMPORTANT***
                                          //Dialog Should be opened if this condition is true
                                      }
                                }
                            })
                    .setNegativeButton(R.string.dgbtnDiscard,
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                        int whichButton) {
                                    dialog.dismiss();
                                }
                            }).create();

Answer 1

这是警报对话框的默认行为。您需要像这样自定义它:

@Override
protected Dialog onCreateDialog(int id) {

    LayoutInflater inflator = LayoutInflater.from(context);
    View view = inflator.inflate(R.layout.yourview, null);
    Button positive = (Button)view.findViewById(R.id.btn_positive);
    Button negative = (Button)view.findViewById(R.id.btn_negative);

    positive.setOnClickListener(new Button.OnClickListener(){
        public void onClick(View v) {
            removeDialog(0);
        }
    });

    negative.setOnClickListener(new Button.OnClickListener(){
        public void onClick(View v) {
            removeDialog(0);
        }
    });

    AlertDialog dialog = new AlertDialog.Builder(this).create();
    dialog.setView(view);

    return dialog;
}

当您调用 removeDialog(0) 时，它将删除对话框。