我想显示一个对话框/弹出窗口,向用户显示一条消息“您确定要删除此条目吗?”,其中一个按钮说“删除”。当点击Delete时,它应该删除该条目,否则什么都不删除。
我已经为这些按钮写了一个点击监听器,但我如何调用对话框或弹出窗口及其功能?
我想显示一个对话框/弹出窗口,向用户显示一条消息“您确定要删除此条目吗?”,其中一个按钮说“删除”。当点击Delete时,它应该删除该条目,否则什么都不删除。
我已经为这些按钮写了一个点击监听器,但我如何调用对话框或弹出窗口及其功能?
当前回答
我想补充David Hedlund的回答,分享一个比他发布的更有活力的方法,这样当你有消极行为要做的时候,你可以使用它,当你没有的时候,我希望它能有所帮助。
private void showAlertDialog(@NonNull Context context, @NonNull String alertDialogTitle, @NonNull String alertDialogMessage, @NonNull String positiveButtonText, @Nullable String negativeButtonText, @NonNull final int positiveAction, @Nullable final Integer negativeAction, @NonNull boolean hasNegativeAction)
{
AlertDialog.Builder builder;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
builder = new AlertDialog.Builder(context, android.R.style.Theme_Material_Dialog_Alert);
} else {
builder = new AlertDialog.Builder(context);
}
builder.setTitle(alertDialogTitle)
.setMessage(alertDialogMessage)
.setPositiveButton(positiveButtonText, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
switch (positiveAction)
{
case 1:
//TODO:Do your positive action here
break;
}
}
});
if(hasNegativeAction || negativeAction!=null || negativeButtonText!=null)
{
builder.setNegativeButton(negativeButtonText, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
switch (negativeAction)
{
case 1:
//TODO:Do your negative action here
break;
//TODO: add cases when needed
}
}
});
}
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.show();
}
其他回答
对我来说
new AlertDialog.Builder(this)
.setTitle("Closing application")
.setMessage("Are you sure you want to exit?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).setNegativeButton("No", null).show();
你可以使用下面的代码:
AlertDialog.Builder alertDialog2 = new AlertDialog.Builder(
AlertDialogActivity.this);
// Setting Dialog Title
alertDialog2.setTitle("Confirm Delete...");
// Setting Dialog Message
alertDialog2.setMessage("Are you sure you want delete this file?");
// Setting Icon to Dialog
alertDialog2.setIcon(R.drawable.delete);
// Setting Positive "Yes" Btn
alertDialog2.setPositiveButton("YES",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Write your code here to execute after dialog
Toast.makeText(getApplicationContext(),
"You clicked on YES", Toast.LENGTH_SHORT)
.show();
}
});
// Setting Negative "NO" Btn
alertDialog2.setNegativeButton("NO",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Write your code here to execute after dialog
Toast.makeText(getApplicationContext(),
"You clicked on NO", Toast.LENGTH_SHORT)
.show();
dialog.cancel();
}
});
// Showing Alert Dialog
alertDialog2.show();
使用Anko (Kotlin开发人员的官方库),您可以简单地使用
alert("Alert title").show()
或者更复杂的:
alert("Hi, I'm Roy", "Have you tried turning it off and on again?") {
yesButton { toast("Oh…") }
noButton {}
}.show()
导入Anko:
implementation "org.jetbrains.anko:anko:0.10.8"
我想补充David Hedlund的回答,分享一个比他发布的更有活力的方法,这样当你有消极行为要做的时候,你可以使用它,当你没有的时候,我希望它能有所帮助。
private void showAlertDialog(@NonNull Context context, @NonNull String alertDialogTitle, @NonNull String alertDialogMessage, @NonNull String positiveButtonText, @Nullable String negativeButtonText, @NonNull final int positiveAction, @Nullable final Integer negativeAction, @NonNull boolean hasNegativeAction)
{
AlertDialog.Builder builder;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
builder = new AlertDialog.Builder(context, android.R.style.Theme_Material_Dialog_Alert);
} else {
builder = new AlertDialog.Builder(context);
}
builder.setTitle(alertDialogTitle)
.setMessage(alertDialogMessage)
.setPositiveButton(positiveButtonText, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
switch (positiveAction)
{
case 1:
//TODO:Do your positive action here
break;
}
}
});
if(hasNegativeAction || negativeAction!=null || negativeButtonText!=null)
{
builder.setNegativeButton(negativeButtonText, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
switch (negativeAction)
{
case 1:
//TODO:Do your negative action here
break;
//TODO: add cases when needed
}
}
});
}
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.show();
}
在材质组件库中,你可以使用MaterialAlertDialogBuilder
MaterialAlertDialogBuilder(context)
.setMessage("Are you sure you want to delete this entry?")
.setPositiveButton("Delete") { dialog, which ->
// Respond to positive button press
}
.setNegativeButton("Cancel") { dialog, which ->
// Respond to positive button press
}
.show()
使用Compose 1.0。X你可以使用:
val openDialog = remember { mutableStateOf(true) }
if (openDialog.value) {
AlertDialog(
onDismissRequest = {
// Dismiss the dialog when the user clicks outside the dialog or on the back
// button. If you want to disable that functionality, simply use an empty
// onCloseRequest.
openDialog.value = false
},
title = null,
text = {
Text(
"Are you sure you want to delete this entry?"
)
},
confirmButton = {
TextButton(
onClick = {
openDialog.value = false
}
) {
Text("Delete")
}
},
dismissButton = {
TextButton(
onClick = {
openDialog.value = false
}
) {
Text("Cancel")
}
}
)
}