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
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();
}
}
});
其他回答
试试这段代码
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(MainActivity.this);
// set title
alertDialogBuilder.setTitle("AlertDialog Title");
// set dialog message
alertDialogBuilder
.setMessage("Some Alert Dialog message.")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Toast.makeText(this, "OK button click ", Toast.LENGTH_SHORT).show();
}
})
.setNegativeButton("CANCEL",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Toast.makeText(this, "CANCEL button click ", Toast.LENGTH_SHORT).show();
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
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();
}
}
});
showDialog(MainActivity.this, "title", "message", "OK", "Cancel", {...}, {...});
科特林
fun showDialog(context: Context, title: String, msg: String,
positiveBtnText: String, negativeBtnText: String?,
positiveBtnClickListener: DialogInterface.OnClickListener,
negativeBtnClickListener: DialogInterface.OnClickListener?): AlertDialog {
val builder = AlertDialog.Builder(context)
.setTitle(title)
.setMessage(msg)
.setCancelable(true)
.setPositiveButton(positiveBtnText, positiveBtnClickListener)
if (negativeBtnText != null)
builder.setNegativeButton(negativeBtnText, negativeBtnClickListener)
val alert = builder.create()
alert.show()
return alert
}
Java
public static AlertDialog showDialog(@NonNull Context context, @NonNull String title, @NonNull String msg,
@NonNull String positiveBtnText, @Nullable String negativeBtnText,
@NonNull DialogInterface.OnClickListener positiveBtnClickListener,
@Nullable DialogInterface.OnClickListener negativeBtnClickListener) {
AlertDialog.Builder builder = new AlertDialog.Builder(context)
.setTitle(title)
.setMessage(msg)
.setCancelable(true)
.setPositiveButton(positiveBtnText, positiveBtnClickListener);
if (negativeBtnText != null)
builder.setNegativeButton(negativeBtnText, negativeBtnClickListener);
AlertDialog alert = builder.create();
alert.show();
return alert;
}
public void showSimpleDialog(View view) {
// Use the Builder class for convenient dialog construction
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setCancelable(false);
builder.setTitle("AlertDialog Title");
builder.setMessage("Simple Dialog Message");
builder.setPositiveButton("OK!!!", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
//
}
})
.setNegativeButton("Cancel ", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
// Create the AlertDialog object and return it
builder.create().show();
}
也可以看看我的关于Android对话的博客,你会在这里找到所有的细节:http://www.fahmapps.com/2016/09/26/dialogs-in-android-part1/。
使用AlertDialog。建造者:
AlertDialog alertDialog = new AlertDialog.Builder(this)
//set icon
.setIcon(android.R.drawable.ic_dialog_alert)
//set title
.setTitle("Are you sure to Exit")
//set message
.setMessage("Exiting will call finish() method")
//set positive button
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
//set what would happen when positive button is clicked
finish();
}
})
//set negative button
.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
//set what should happen when negative button is clicked
Toast.makeText(getApplicationContext(),"Nothing Happened",Toast.LENGTH_LONG).show();
}
})
.show();
您将得到以下输出。
要查看警报对话框教程使用下面的链接。
Android警报对话框教程