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
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();
})
其他回答
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);
}
});
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;
对于ProgressDialogs
要防止对话框自动关闭,必须在显示ProgressDialog后设置OnClickListener,如下所示:
connectingDialog = new ProgressDialog(this);
connectingDialog.setCancelable(false);
connectingDialog.setCanceledOnTouchOutside(false);
// Create the button but set the listener to a null object.
connectingDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel",
(DialogInterface.OnClickListener) null )
// Show the dialog so we can then get the button from the view.
connectingDialog.show();
// Get the button from the view.
Button dialogButton = connectingDialog.getButton( DialogInterface.BUTTON_NEGATIVE);
// Set the onClickListener here, in the view.
dialogButton.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick ( View v ) {
// Dialog will not get dismissed until you call dismiss() explicitly.
}
});
超简单的Kotlin方法
with(AlertDialog.Builder(this)) {
setTitle("Title")
setView(R.layout.dialog_name)
setPositiveButton("Ok", null)
setNegativeButton("Cancel") { _, _ -> }
create().apply {
setOnShowListener {
getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener {
//Validate and dismiss
dismiss()
}
}
}
}.show()
这段代码对你有用,因为我有一个类似的问题,这对我有用。:)
1-重写片段对话框类中的Onstart()方法。
@Override
public void onStart() {
super.onStart();
final AlertDialog D = (AlertDialog) getDialog();
if (D != null) {
Button positive = (Button) D.getButton(Dialog.BUTTON_POSITIVE);
positive.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if (edittext.equals("")) {
Toast.makeText(getActivity(), "EditText empty",Toast.LENGTH_SHORT).show();
} else {
D.dismiss(); //dissmiss dialog
}
}
});
}
}
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