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
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();
}
其他回答
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！
使用此代码，您可以防止单击肯定按钮时对话框关闭。此外，您还可以使用否定按钮实现相同的功能。
final AlertDialog alertDialog = alertDialogBuilder
.setCancelable(false)
.setTitle("TITLE");
.setPositiveButton("OK", null)
.setNegativeButton("CANCEL",
(dialog, id) -> {
dialog.cancel();
})
.show();
Button positiveButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
positiveButton.setOnClickListener(v -> {
// check whatever you want
if(checkMyCondition())
dialog.cancel();
})
对于API 8之前的版本，如果editText的内容不正确，我使用一个布尔标志、一个关闭监听器并再次调用dialog.show来解决这个问题。这样地：
case ADD_CLIENT:
LayoutInflater factoryClient = LayoutInflater.from(this);
final View EntryViewClient = factoryClient.inflate(
R.layout.alert_dialog_add_client, null);
EditText ClientText = (EditText) EntryViewClient
.findViewById(R.id.client_edit);
AlertDialog.Builder builderClient = new AlertDialog.Builder(this);
builderClient
.setTitle(R.string.alert_dialog_client)
.setCancelable(false)
.setView(EntryViewClient)
.setPositiveButton("Save",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
EditText newClient = (EditText) EntryViewClient
.findViewById(R.id.client_edit);
String newClientString = newClient
.getText().toString();
if (checkForEmptyFields(newClientString)) {
//If field is empty show toast and set error flag to true;
Toast.makeText(getApplicationContext(),
"Fields cant be empty",
Toast.LENGTH_SHORT).show();
add_client_error = true;
} else {
//Here save the info and set the error flag to false
add_client_error = false;
}
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
add_client_error = false;
dialog.cancel();
}
});
final AlertDialog alertClient = builderClient.create();
alertClient.show();
alertClient
.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
//If the error flag was set to true then show the dialog again
if (add_client_error == true) {
alertClient.show();
} else {
return;
}
}
});
return true;
我编写了一个简单的类（AlertDialogBuilder），您可以使用它在按下对话框按钮时禁用自动关闭功能。
它还与Android 1.6兼容，因此它不使用OnShowListener（仅API>=8可用）。
因此，您可以使用此CustomAlertDialogBuilder，而不是使用AlertDialogBuilder。最重要的部分是不应该调用create（），而应该只调用show（）方法。我添加了setCanceledOnTouchOutside（）和setOnDismissListener等方法，这样您仍然可以直接在生成器上设置它们。
我在Android 1.6、2.x、3.x和4.x上测试了它，所以它应该工作得很好。如果你发现一些问题，请在这里评论。
package com.droidahead.lib.utils;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.view.View;
import android.view.View.OnClickListener;
public class CustomAlertDialogBuilder extends AlertDialog.Builder {
/**
* Click listeners
*/
private DialogInterface.OnClickListener mPositiveButtonListener = null;
private DialogInterface.OnClickListener mNegativeButtonListener = null;
private DialogInterface.OnClickListener mNeutralButtonListener = null;
/**
* Buttons text
*/
private CharSequence mPositiveButtonText = null;
private CharSequence mNegativeButtonText = null;
private CharSequence mNeutralButtonText = null;
private DialogInterface.OnDismissListener mOnDismissListener = null;
private Boolean mCancelOnTouchOutside = null;
public CustomAlertDialogBuilder(Context context) {
super(context);
}
public CustomAlertDialogBuilder setOnDismissListener (DialogInterface.OnDismissListener listener) {
mOnDismissListener = listener;
return this;
}
@Override
public CustomAlertDialogBuilder setNegativeButton(CharSequence text, DialogInterface.OnClickListener listener) {
mNegativeButtonListener = listener;
mNegativeButtonText = text;
return this;
}
@Override
public CustomAlertDialogBuilder setNeutralButton(CharSequence text, DialogInterface.OnClickListener listener) {
mNeutralButtonListener = listener;
mNeutralButtonText = text;
return this;
}
@Override
public CustomAlertDialogBuilder setPositiveButton(CharSequence text, DialogInterface.OnClickListener listener) {
mPositiveButtonListener = listener;
mPositiveButtonText = text;
return this;
}
@Override
public CustomAlertDialogBuilder setNegativeButton(int textId, DialogInterface.OnClickListener listener) {
setNegativeButton(getContext().getString(textId), listener);
return this;
}
@Override
public CustomAlertDialogBuilder setNeutralButton(int textId, DialogInterface.OnClickListener listener) {
setNeutralButton(getContext().getString(textId), listener);
return this;
}
@Override
public CustomAlertDialogBuilder setPositiveButton(int textId, DialogInterface.OnClickListener listener) {
setPositiveButton(getContext().getString(textId), listener);
return this;
}
public CustomAlertDialogBuilder setCanceledOnTouchOutside (boolean cancelOnTouchOutside) {
mCancelOnTouchOutside = cancelOnTouchOutside;
return this;
}
@Override
public AlertDialog create() {
throw new UnsupportedOperationException("CustomAlertDialogBuilder.create(): use show() instead..");
}
@Override
public AlertDialog show() {
final AlertDialog alertDialog = super.create();
DialogInterface.OnClickListener emptyOnClickListener = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) { }
};
// Enable buttons (needed for Android 1.6) - otherwise later getButton() returns null
if (mPositiveButtonText != null) {
alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, mPositiveButtonText, emptyOnClickListener);
}
if (mNegativeButtonText != null) {
alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, mNegativeButtonText, emptyOnClickListener);
}
if (mNeutralButtonText != null) {
alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, mNeutralButtonText, emptyOnClickListener);
}
// Set OnDismissListener if available
if (mOnDismissListener != null) {
alertDialog.setOnDismissListener(mOnDismissListener);
}
if (mCancelOnTouchOutside != null) {
alertDialog.setCanceledOnTouchOutside(mCancelOnTouchOutside);
}
alertDialog.show();
// Set the OnClickListener directly on the Button object, avoiding the auto-dismiss feature
// IMPORTANT: this must be after alert.show(), otherwise the button doesn't exist..
// If the listeners are null don't do anything so that they will still dismiss the dialog when clicked
if (mPositiveButtonListener != null) {
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mPositiveButtonListener.onClick(alertDialog, AlertDialog.BUTTON_POSITIVE);
}
});
}
if (mNegativeButtonListener != null) {
alertDialog.getButton(AlertDialog.BUTTON_NEGATIVE).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mNegativeButtonListener.onClick(alertDialog, AlertDialog.BUTTON_NEGATIVE);
}
});
}
if (mNeutralButtonListener != null) {
alertDialog.getButton(AlertDialog.BUTTON_NEUTRAL).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mNeutralButtonListener.onClick(alertDialog, AlertDialog.BUTTON_NEUTRAL);
}
});
}
return alertDialog;
}
}
EDIT下面是一个关于如何使用CustomAlertDialogBuilder的小示例：
// Create the CustomAlertDialogBuilder
CustomAlertDialogBuilder dialogBuilder = new CustomAlertDialogBuilder(context);
// Set the usual data, as you would do with AlertDialog.Builder
dialogBuilder.setIcon(R.drawable.icon);
dialogBuilder.setTitle("Dialog title");
dialogBuilder.setMessage("Some text..");
// Set your buttons OnClickListeners
dialogBuilder.setPositiveButton ("Button 1", new DialogInterface.OnClickListener() {
public void onClick (DialogInterface dialog, int which) {
// Do something...
// Dialog will not dismiss when the button is clicked
// call dialog.dismiss() to actually dismiss it.
}
});
// By passing null as the OnClickListener the dialog will dismiss when the button is clicked.
dialogBuilder.setNegativeButton ("Close", null);
// Set the OnDismissListener (if you need it)
dialogBuilder.setOnDismissListener(new DialogInterface.OnDismissListener() {
public void onDismiss(DialogInterface dialog) {
// dialog was just dismissed..
}
});
// (optional) set whether to dismiss dialog when touching outside
dialogBuilder.setCanceledOnTouchOutside(false);
// Show the dialog
dialogBuilder.show();
干杯
Yuvi
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();
}
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