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
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;
}
其他回答
new AlertDialog.Builder(v.getContext()).setMessage("msg to display!").show();
在过去的几天里,我的同事一直在问我如何在Xamarin中使用AlertDialog。Android和几乎所有人都把这个问题作为参考发给了我,他们在问我之前读了这个问题(没有找到答案),所以这里是Xamarin。Android (c#)版本:
var alertDialog = new AlertDialog.Builder(this) // this: Activity
.SetTitle("Hello!")
.SetMessage("Are you sure?")
.SetPositiveButton("Ok", (sender, e) => { /* ok things */ })
.SetNegativeButton("Cancel", (sender, e) => { /* cancel things */ })
.Create();
alertDialog.Show();
// you can customize your AlertDialog, like so
var tvMessage = alertDialog.FindViewById<TextView>(Android.Resource.Id.Message);
tvMessage.TextSize = 13;
// ...
我已经创建了一个对话框,用于询问Person是否想呼叫Person。
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.Toast;
public class Firstclass extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.first);
ImageView imageViewCall = (ImageView) findViewById(R.id.ring_mig);
imageViewCall.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v)
{
try
{
showDialog("0728570527");
}
catch (Exception e)
{
e.printStackTrace();
}
}
});
}
public void showDialog(final String phone) throws Exception
{
AlertDialog.Builder builder = new AlertDialog.Builder(Firstclass.this);
builder.setMessage("Ring: " + phone);
builder.setPositiveButton("Ring", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
Intent callIntent = new Intent(Intent.ACTION_DIAL);// (Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:" + phone));
startActivity(callIntent);
dialog.dismiss();
}
});
builder.setNegativeButton("Avbryt", new DialogInterface.OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
}
});
builder.show();
}
}
我在onClick方法中使用这个AlertDialog:
button.setOnClickListener(v -> {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
LayoutInflater layoutInflaterAndroid = LayoutInflater.from(this);
View view = layoutInflaterAndroid.inflate(R.layout.cancel_dialog, null);
builder.setView(view);
builder.setCancelable(false);
final AlertDialog alertDialog = builder.create();
alertDialog.show();
view.findViewById(R.id.yesButton).setOnClickListener(v -> onBackPressed());
view.findViewById(R.id.nobutton).setOnClickListener(v -> alertDialog.dismiss());
});
dialog.xml
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textmain"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:gravity="center"
android:padding="5dp"
android:text="@string/warning"
android:textColor="@android:color/black"
android:textSize="18sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textpart2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:gravity="center"
android:lines="2"
android:maxLines="2"
android:padding="5dp"
android:singleLine="false"
android:text="@string/dialog_cancel"
android:textAlignment="center"
android:textColor="@android:color/black"
android:textSize="15sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textmain" />
<TextView
android:id="@+id/yesButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="40dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="40dp"
android:layout_marginBottom="5dp"
android:background="#87cefa"
android:gravity="center"
android:padding="10dp"
android:text="@string/yes"
android:textAlignment="center"
android:textColor="@android:color/black"
android:textSize="15sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textpart2" />
<TextView
android:id="@+id/nobutton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="40dp"
android:layout_marginTop="5dp"
android:layout_marginEnd="40dp"
android:background="#87cefa"
android:gravity="center"
android:padding="10dp"
android:text="@string/no"
android:textAlignment="center"
android:textColor="@android:color/black"
android:textSize="15sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/yesButton" />
<TextView
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_margin="5dp"
android:padding="10dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/nobutton" />
</androidx.constraintlayout.widget.ConstraintLayout>
// 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();
}