Android Dim自定义对话框背景

标题是,我似乎无法调暗我所做的自定义对话框的背景.无数解决方案在线提到了下面第一个代码段中的最后3行代码,这对对话框的UI没有任何影响.

请参阅以下代码：

Dialog dialog = new Dialog(MainActivity.this);
dialog.requestwindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.dialog);
TextView textView = (TextView) dialog.findViewById(R.id.textView);
textView.setText("Custom Text Example");
dialog.show();

WindowManager.LayoutParams layoutParams = dialog.getwindow().getAttributes();
layoutParams.dimAmount = .7f;
dialog.getwindow().setAttributes(layoutParams);

自定义对话框的布局xml文件如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/progressDialogCustom"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/dialog_black"
    android:orientation="horizontal"
    android:padding="10dp" >

    <ProgressBar
        android:id="@+id/progressBar1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="center_vertical"
        android:textColor="@android:color/white"
        android:text="Updating Profile . . ." />

</LinearLayout>

@ drawable / dialog_black文件如下：

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <solid android:color="@android:color/background_dark" />

    <corners
        android:bottomLefTradius="7dp"
        android:bottomrighTradius="7dp"
        android:topLefTradius="7dp"
        android:topRighTradius="7dp" />

    <stroke
        android:width="1px"
        android:color="@android:color/darker_gray" />

    <padding
        android:bottom="5dp"
        android:left="5dp"
        android:right="5dp"
        android:top="5dp" />

</shape>

解决方法

你试过添加：

getwindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);

除非存在此标志,否则将忽略dimAmount.