Android:布局背后的模糊 ListView

Question

我有一个 ListView 和一个位于 ListView 前面的布局。我希望该布局以他背后的 ListView 的模糊作为背景。就像在图像中。模糊根据 ListView 滚动而变化。我该怎么做呢？

Answer 1

这个库就是你需要的https://github.com/Dimezis/BlurView

<eightbitlab.com.blurview.BlurView
    android:id="@+id/blurView"
    android:layout_width="match_parent"
    android:layout_height="66dp"
    android:layout_alignParentBottom="true"
    >
    <!--anything below this view will be blured-->
</eightbitlab.com.blurview.BlurView>

在app.gradle defaultConfig

    renderscriptTargetApi 23
    renderscriptSupportModeEnabled true

在 Activity 中

    blurView = (BlurView) findViewById(R.id.blurView);

    final View decorView = getWindow().getDecorView();
    final View rootView = decorView.findViewById(android.R.id.content);
    final Drawable windowBackground = decorView.getBackground();

    blurView.setupWith(rootView)
            .windowBackground(windowBackground)
            .blurAlgorithm(new RenderScriptBlur(this, true)) //Preferable algorithm, needs RenderScript support mode enabled
            .blurRadius(10);