How to change the image displayed in the android widget selection dialogue?

问题

How do I change the rendering?

回答1:

Specify the android:previewImage attribute in your app widget XML metadata file:

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
  android:minWidth="146dip"
  android:minHeight="146dip"
  android:updatePeriodMillis="0"
  android:initialLayout="@layout/widget"
  android:autoAdvanceViewId="@+id/words"
  android:previewImage="@drawable/preview"
  android:resizeMode="vertical"
/>

(from this sample project)

回答2:

I had the same issue, tried everything deleted the old previewImage, uninstall/reinstall app, rebooting device, Sync Project with Gradle Files, Invalidate Caches/Restart, none worked. Finally, I could change it only after changing applicationId in build.gradle app file.

来源：https://stackoverflow.com/questions/27650435/how-to-change-the-image-displayed-in-the-android-widget-selection-dialogue