Question

我想在中心垂直位置显示自定义对话框，但它显示在顶部。上面的第一个是我的xml文件，第二个是在真实设备中运行后输出。这是对话框的代码。

    //alert dialog code
    //add theme to display on whole page
    AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this,      
    android.R.style.Theme_Holo_Light_NoActionBar_TranslucentDecor);
    LayoutInflater inflater = this.getLayoutInflater();
    //custom layout
    View dialogView = inflater.inflate(R.layout.custom_bar, null);
    dialogBuilder.setView(dialogView);

    //button to close dialog box
    Button closeButton = (Button)     
    dialogView.findViewById(R.id.closeButton);
    final AlertDialog alertDialog = dialogBuilder.create();
    closeButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            alertDialog.dismiss();
        }
    });
    //show dialog
    alertDialog.show();

Answer 1

将此代码用于屏幕中心的“警报”对话框。

在您的课程中添加此内容，并根据需要更改代码。

   //Internet Alert Dialog 
    public static void InternetAlert(final Context _A) {
        final Dialog dialog = new Dialog(_A, R.style.CustomDialogStyle);
        dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setCanceledOnTouchOutside(true);
        dialog.setContentView(R.layout.dialog_internet_connection);
        final Button Yes = (Button) dialog.findViewById(R.id.btn_yes);
        Yes.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });

        dialog.show();
    }

如果要填充整个屏幕，只需将FrameLayout高度更改为match_parent

即可

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="320dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center">

    <android.support.v7.widget.CardView
        android:id="@+id/cv_SignOut"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="?attr/actionBarSize"
        android:layout_marginLeft="@dimen/activity_horizontal_margin"
        android:layout_marginRight="@dimen/activity_horizontal_margin"
        android:layout_marginTop="?attr/actionBarSize"
        app:cardBackgroundColor="#0D000000"
        app:cardCornerRadius="6dp"
        app:cardElevation="3dp"
        app:cardUseCompatPadding="true">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@android:color/transparent">

            <TextView
                android:id="@+id/title_SignOut"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:background="@color/textViewColorPrimary"
                android:gravity="center"
                android:minHeight="?attr/actionBarSize"
                android:text="@string/info"
                android:textAppearance="?attr/textAppearanceSearchResultTitle"
                android:textColor="@color/colorWhite" />


            <TextView
                android:id="@+id/signOutAlert"
                style="@android:style/TextAppearance.DeviceDefault.SearchResult.Subtitle"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/title_SignOut"
                android:background="@color/colorBackground"
                android:gravity="center"
                android:minHeight="120dip"
                android:paddingBottom="@dimen/activity_horizontal_margin"
                android:paddingLeft="@dimen/activity_horizontal_margin"
                android:paddingRight="@dimen/activity_horizontal_margin"
                android:paddingTop="@dimen/activity_horizontal_margin"
                android:text="@string/info_internet_check"
                android:textColor="@color/colorPrimary" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/signOutAlert"
                android:background="@color/white"
                android:orientation="horizontal"
                android:weightSum="1">

                <Button
                    android:id="@+id/btn_yes"
                    android:layout_width="0dip"
                    android:layout_height="wrap_content"
                    android:layout_marginRight="2dip"
                    android:layout_weight="1"
                    android:background="@color/colorBackground"
                    android:gravity="center"
                    android:minHeight="?attr/actionBarSize"
                    android:text="OK"
                    android:textAppearance="?attr/textAppearanceSearchResultTitle"
                    android:textColor="@color/colorAccent" />


            </LinearLayout>
        </RelativeLayout>
    </android.support.v7.widget.CardView>
</FrameLayout>

希望这可能会有所帮助：）

Answer 2

在custom_bar put android:gravity="center"

的主要布局中

Answer 3

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_vertical"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">


        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="abc"
            android:textSize="30sp" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="abc"
            android:textSize="30sp" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="abc"
            android:textSize="30sp" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Done" />


    </LinearLayout>

</LinearLayout>

Answer 4

------
dialogBuilder.showAsDropDown(dialogView, 50, 400, Gravity.CENTER);
alertDialog.show();
----

将该行添加到您的代码中。它会将弹出窗口设置为居中。

Answer 5

您应该这样写。

AlertDialog dialog = new AlertDialog.Builder(this, R.style.Dark).create();
                        if (dialog.getWindow() != null)
                        {
                            Window window = dialog.getWindow();
                            window.setLayout(WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT);
                            window.setGravity(Gravity.CENTER);
                            dialog.getWindow().setBackgroundDrawableResource(android.R.color.background_dark);
                        }

这将在屏幕中央显示警报对话框。

如何在中心垂直位置显示自定义布局警报对话框

5 个答案: