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
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();
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
受汤姆的回答启发，我认为这里的想法是：
在创建对话框期间将onClickListener设置为null然后在显示对话框后设置onClickListener。
您可以像Tom一样重写onShowListener。或者，您可以
调用AlertDialog的show（）后获取按钮按如下方式设置按钮的onClickListener（我认为稍微可读一些）。
代码：
AlertDialog.Builder builder = new AlertDialog.Builder(context);
// ...
final AlertDialog dialog = builder.create();
dialog.show();
// now you can override the default onClickListener
Button b = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.i(TAG, "ok button is clicked");
handleClick(dialog);
}
});
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();
}
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。
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