我有一个对话框与EditText进行输入。当我单击对话框上的“是”按钮时,它将验证输入,然后关闭对话框。但是,如果输入错误,我希望保持在同一对话框中。每次无论输入是什么,当我单击“否”按钮时,对话框都会自动关闭。如何禁用此功能?顺便说一句,我在对话框中使用了PositiveButton和NegativeButton。


当前回答

这个链接的答案是一个简单的解决方案,它与API 3兼容。它与Tom Bollwitt的解决方案非常相似,但没有使用兼容性较差的OnShowListener。

是的,你可以。您基本上需要:使用DialogBuilder创建对话框show()对话框在显示的对话框中查找按钮并覆盖其onClickListener

自从我扩展EditTextPreference以来,我对Kamen的代码进行了一些小的修改。

@Override
protected void showDialog(Bundle state) {
  super.showDialog(state);

  class mocl implements OnClickListener{
    private final AlertDialog dialog;
    public mocl(AlertDialog dialog) {
          this.dialog = dialog;
      }
    @Override
    public void onClick(View v) {

        //checks if EditText is empty, and if so tells the user via Toast
        //otherwise it closes dialog and calls the EditTextPreference's onClick
        //method to let it know that the button has been pressed

        if (!IntPreference.this.getEditText().getText().toString().equals("")){
        dialog.dismiss();
        IntPreference.this.onClick(dialog,DialogInterface.BUTTON_POSITIVE);
        }
        else {
            Toast t = Toast.makeText(getContext(), "Enter a number!", Toast.LENGTH_SHORT);
            t.show();
        }

    }
  }

  AlertDialog d = (AlertDialog) getDialog();
  Button b = d.getButton(DialogInterface.BUTTON_POSITIVE);
  b.setOnClickListener(new mocl((d)));
}

真有趣!

其他回答

为DialogFragment使用自定义布局,并在内容下添加LinearLayout,该布局可以设置为无边框,以匹配Google Material Design。然后找到新创建的按钮并覆盖其OnClickListener。

例子:

public class AddTopicFragment extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        // Get the layout inflater
        LayoutInflater inflater = getActivity().getLayoutInflater();
        final View dialogView = inflater.inflate(R.layout.dialog_add_topic, null);

        Button saveTopicDialogButton = (Button) dialogView.findViewById(R.id.saveTopicDialogButton);
        Button cancelSaveTopicDialogButton = (Button) dialogView.findViewById(R.id.cancelSaveTopicDialogButton);

        final AppCompatEditText addTopicNameET = (AppCompatEditText) dialogView.findViewById(R.id.addTopicNameET);
        final AppCompatEditText addTopicCreatedByET = (AppCompatEditText) dialogView.findViewById(R.id.addTopicCreatedByET);

        saveTopicDialogButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // validate inputs
                if(addTopicNameET.getText().toString().trim().isEmpty()){
                    addTopicNameET.setError("Topic name can't be empty");
                    addTopicNameET.requestFocus();
                }else if(addTopicCreatedByET.getText().toString().trim().isEmpty()){
                    addTopicCreatedByET.setError("Topic created by can't be empty");
                    addTopicCreatedByET.requestFocus();
                }else {
                    // save topic to database
                    Topic topic = new Topic();
                    topic.name = addTopicNameET.getText().toString().trim();
                    topic.createdBy = addTopicCreatedByET.getText().toString().trim();
                    topic.createdDate = new Date().getTime();
                    topic.save();
                    AddTopicFragment.this.dismiss();
                }
            }
        });

        cancelSaveTopicDialogButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AddTopicFragment.this.dismiss();
            }
        });

        // Inflate and set the layout for the dialog
        // Pass null as the parent view because its going in the dialog layout
        builder.setView(dialogView)
               .setMessage(getString(R.string.add_topic_message));

        return builder.create();
    }

}

dialog_add_topic.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:padding="@dimen/activity_horizontal_margin"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:errorEnabled="true">

        <android.support.v7.widget.AppCompatEditText
            android:id="@+id/addTopicNameET"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Topic Name"
            android:inputType="textPersonName"
            android:maxLines="1" />

    </android.support.design.widget.TextInputLayout>

    <android.support.design.widget.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:errorEnabled="true">

        <android.support.v7.widget.AppCompatEditText
            android:id="@+id/addTopicCreatedByET"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Created By"
            android:inputType="textPersonName"
            android:maxLines="1" />

    </android.support.design.widget.TextInputLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:text="@string/cancel"
            android:layout_weight="1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/cancelSaveTopicDialogButton"
            style="@style/Widget.AppCompat.Button.ButtonBar.AlertDialog" />

        <Button
            android:text="@string/save"
            android:layout_weight="1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/saveTopicDialogButton"
            style="@style/Widget.AppCompat.Button.ButtonBar.AlertDialog" />

    </LinearLayout>


</LinearLayout>

这是最终结果。

如果您正在使用DialogFragment,这是处理Dialog的推荐方法。

AlertDialog的setButton()方法(我认为AlertDialogBuilder的setPositiveButton(()和setNegativeButton()也是如此)所发生的事情是,您使用它设置的按钮(例如AlertDialog.button_POSITIVE)在按下时实际上会触发两个不同的OnClickListener对象。

第一个是DialogInterface.OnClickListener,它是setButton()、setPositiveButton(()和setNegativeButton()的参数。

另一个是View.OnClickListener,它将被设置为在按下任何按钮时自动关闭AlertDialog,并且由AlertDialog自身设置。

您可以做的是使用带有null的setButton()作为DialogInterface.OnClickListener来创建按钮,然后在View.OnClick Listener中调用自定义操作方法。例如,

@Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
    AlertDialog alertDialog = new AlertDialog(getActivity());
    // set more items...
    alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "OK", null);

    return alertDialog;
}

然后,您可以在DialogFragment的onResume()方法中重写默认AlertDialog的按钮View.OnClickListener(否则将关闭对话框):

@Override
public void onResume()
{
    super.onResume();
    AlertDialog alertDialog = (AlertDialog) getDialog();
    Button okButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
    okButton.setOnClickListener(new View.OnClickListener() { 
        @Override
        public void onClick(View v)
        {
            performOkButtonAction();
        }
    });
}

private void performOkButtonAction() {
    // Do your stuff here
}

您需要在onResume()方法中设置此值,因为getButton()将返回null,直到显示对话框!

这将导致您的自定义操作方法只被调用一次,默认情况下对话框不会被关闭。

编辑:这只适用于一些评论中提到的API 8+。

这是一个迟到的回答,但您可以在AlertDialog中添加一个onShowListener,然后可以覆盖按钮的onClickListener。

final AlertDialog dialog = new AlertDialog.Builder(context)
        .setView(v)
        .setTitle(R.string.my_title)
        .setPositiveButton(android.R.string.ok, null) //Set to null. We override the onclick
        .setNegativeButton(android.R.string.cancel, null)
        .create();

dialog.setOnShowListener(new DialogInterface.OnShowListener() {

    @Override
    public void onShow(DialogInterface dialogInterface) {

        Button button = ((AlertDialog) dialog).getButton(AlertDialog.BUTTON_POSITIVE);
        button.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                // TODO Do something

                //Dismiss once everything is OK.
                dialog.dismiss();
            }
        });
    }
});
dialog.show();

可以添加builder.show();在返回之前的验证消息之后;

这样地

    public void login()
{
    final AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setView(R.layout.login_layout);
    builder.setTitle("Login");



    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener()
    {
        @Override
        public void onClick(DialogInterface dialog, int id)
        {
            dialog.cancel();
        }
    });// put the negative button before the positive button, so it will appear

    builder.setPositiveButton("Ok", new DialogInterface.OnClickListener()
    {
        @Override
        public void onClick(DialogInterface dialog, int id)
        {
            Dialog d = (Dialog) dialog;
            final EditText etUserName = (EditText) d.findViewById(R.id.etLoginName);
            final EditText etPassword = (EditText) d.findViewById(R.id.etLoginPassword);
            String userName = etUserName.getText().toString().trim();
            String password = etPassword.getText().toString().trim();

            if (userName.isEmpty() || password.isEmpty())
            {

                Toast.makeText(getApplicationContext(),
                        "Please Fill all fields", Toast.LENGTH_SHORT).show();
                builder.show();// here after validation message before retrun
                               //  it will reopen the dialog
                              // till the user enter the right condition
                return;
            }

            user = Manager.get(getApplicationContext()).getUserByName(userName);

            if (user == null)
            {
                Toast.makeText(getApplicationContext(),
                        "Error ethier username or password are wrong", Toast.LENGTH_SHORT).show();
                builder.show();
                return;
            }
            if (password.equals(user.getPassword()))
            {
                etPassword.setText("");
                etUserName.setText("");
                setLogged(1);
                setLoggedId(user.getUserId());
                Toast.makeText(getApplicationContext(),
                        "Successfully logged in", Toast.LENGTH_SHORT).show();
               dialog.dismiss();// if every thing is ok then dismiss the dialog
            }
            else
            {
                Toast.makeText(getApplicationContext(),
                        "Error ethier username or password are wrong", Toast.LENGTH_SHORT).show();
                builder.show();
                return;
            }

        }
    });

    builder.show();

}

它可以用最简单的方法构建:

带有自定义视图和两个按钮(正和负)的警报对话框。

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()).setTitle(getString(R.string.select_period));
builder.setPositiveButton(getString(R.string.ok), null);

 builder.setNegativeButton(getString(R.string.cancel), new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {

    // Click of Cancel Button

   }
 });

  LayoutInflater li = LayoutInflater.from(getActivity());
  View promptsView = li.inflate(R.layout.dialog_date_picker, null, false);
  builder.setView(promptsView);

  DatePicker startDatePicker = (DatePicker)promptsView.findViewById(R.id.startDatePicker);
  DatePicker endDatePicker = (DatePicker)promptsView.findViewById(R.id.endDatePicker);

  final AlertDialog alertDialog = builder.create();
  alertDialog.show();

  Button theButton = alertDialog.getButton(DialogInterface.BUTTON_POSITIVE);
  theButton.setOnClickListener(new CustomListener(alertDialog, startDatePicker, endDatePicker));

警报日志正面按钮的CustomClickLister:

private class CustomListener implements View.OnClickListener {
        private final Dialog dialog;
        private DatePicker mStartDp, mEndDp;
    public CustomListener(Dialog dialog, DatePicker dS, DatePicker dE) {
        this.dialog = dialog;
        mStartDp = dS;
        mEndDp = dE;
    }

    @Override
    public void onClick(View v) {

        int day1  = mStartDp.getDayOfMonth();
        int month1= mStartDp.getMonth();
        int year1 = mStartDp.getYear();
        Calendar cal1 = Calendar.getInstance();
        cal1.set(Calendar.YEAR, year1);
        cal1.set(Calendar.MONTH, month1);
        cal1.set(Calendar.DAY_OF_MONTH, day1);


        int day2  = mEndDp.getDayOfMonth();
        int month2= mEndDp.getMonth();
        int year2 = mEndDp.getYear();
        Calendar cal2 = Calendar.getInstance();
        cal2.set(Calendar.YEAR, year2);
        cal2.set(Calendar.MONTH, month2);
        cal2.set(Calendar.DAY_OF_MONTH, day2);

        if(cal2.getTimeInMillis()>=cal1.getTimeInMillis()){
            dialog.dismiss();
            Log.i("Dialog", "Dismiss");
            // Condition is satisfied so do dialog dismiss
            }else {
            Log.i("Dialog", "Do not Dismiss");
            // Condition is not satisfied so do not dialog dismiss
        }

    }
}

Done