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
试试下面的代码:
AlertDialog.Builder builder1 = new AlertDialog.Builder(context);
builder1.setMessage("Write your message here.");
builder1.setCancelable(true);
builder1.setPositiveButton(
"Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
builder1.setNegativeButton(
"No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert11 = builder1.create();
alert11.show();
其他回答
new AlertDialog.Builder(v.getContext()).setMessage("msg to display!").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")
}
}
)
}
// Dialog box
public void dialogBox() {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
alertDialogBuilder.setMessage("Click on Image for tag");
alertDialogBuilder.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
}
});
alertDialogBuilder.setNegativeButton("cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
现在与Jetpack撰写引入android,你可以简单地创建警报对话框使用下面的代码
if (viewModel.shouldDialogOpen.value) {
AlertDialog(onDismissRequest = { viewModel.shouldDialogOpen.value = false },
title = { Text("Delete Entry?") },
text = {
Text("Are you sure you want to delete this entry?")
},
dismissButton = {
Button(modifier = Modifier.fillMaxWidth(), onClick = {
viewModel.shouldDialogOpen.value = false
}) {
Text(text = "Cancel")
}
}, confirmButton = {
Button(modifier = Modifier.fillMaxWidth(), onClick = {
viewModel.shouldDialogOpen.value = false
viewModel.beginDelete(recipe)
}) {
Text(text = "Okay")
}
})
}
在viewModel中。shouldDialogOpen, shouldDialogOpen是viewmodel中的一个mutablestate字段,当我们需要显示或解散对话框时,我们会改变它的值。
更多的代码样本Jetpack撰写:- https://androidlearnersite.wordpress.com/2021/08/03/jetpack-compose-1-0-0-sample-codes/
David Hedlund发布的代码给了我错误:
无法添加窗口-空令牌无效
如果你得到同样的错误,请使用下面的代码。它的工作原理!
runOnUiThread(new Runnable() {
@Override
public void run() {
if (!isFinishing()){
new AlertDialog.Builder(YourActivity.this)
.setTitle("Your Alert")
.setMessage("Your Message")
.setCancelable(false)
.setPositiveButton("ok", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// Whatever...
}
}).show();
}
}
});