是的,我知道有AlertDialog。但我很惊讶地知道在Android中显示对话框有多么困难(好吧,至少不是程序员友好的)。
我曾经是一名。net开发人员,我想知道在android上是否有类似的功能?
if (MessageBox.Show("Sure?", "", MessageBoxButtons.YesNo) == DialogResult.Yes){
// Do something...
}
是的,我知道有AlertDialog。但我很惊讶地知道在Android中显示对话框有多么困难(好吧,至少不是程序员友好的)。
我曾经是一名。net开发人员,我想知道在android上是否有类似的功能?
if (MessageBox.Show("Sure?", "", MessageBoxButtons.YesNo) == DialogResult.Yes){
// Do something...
}
当前回答
你可以在Kotlin中轻松完成:
alert("Testing alerts") {
title = "Alert"
yesButton { toast("Yess!!!") }
noButton { }
}.show()
其他回答
Kotlin在Android::
override fun onBackPressed() {
confirmToCancel()
}
private fun confirmToCancel() {
AlertDialog.Builder(this)
.setTitle("Title")
.setMessage("Do you want to cancel?")
.setCancelable(false)
.setPositiveButton("Yes") {
dialog: DialogInterface, _: Int ->
dialog.dismiss()
// for sending data to previous activity use
// setResult(response code, data)
finish()
}
.setNegativeButton("No") {
dialog: DialogInterface, _: Int ->
dialog.dismiss()
}
.show()
}
谢谢尼基,你的回答帮助我改善了现有的简单添加我想要的行动如下
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Do this action");
builder.setMessage("do you want confirm this action?");
builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Do do my action here
dialog.dismiss();
}
});
builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// I do not need any action here you might
dialog.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();
试试这个:
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Confirm");
builder.setMessage("Are you sure?");
builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Do nothing but close the dialog
dialog.dismiss();
}
});
builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// Do nothing
dialog.dismiss();
}
});
AlertDialog alert = builder.create();
alert.show();
史蒂夫的回答是正确的,尽管有些片段过时了。下面是一个FragmentDialog的例子。
类:
public class SomeDialog extends DialogFragment {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
return new AlertDialog.Builder(getActivity())
.setTitle("Title")
.setMessage("Sure you wanna do this!")
.setNegativeButton(android.R.string.no, new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// do nothing (will close dialog)
}
})
.setPositiveButton(android.R.string.yes, new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// do something
}
})
.create();
}
}
开始对话:
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
// Create and show the dialog.
SomeDialog newFragment = new SomeDialog ();
newFragment.show(ft, "dialog");
您还可以让类实现onClickListener,并使用它来代替嵌入式侦听器。
你可以在Kotlin中轻松完成:
alert("Testing alerts") {
title = "Alert"
yesButton { toast("Yess!!!") }
noButton { }
}.show()