progressBar图片旋转效果实现

<ProgressBar

android:id="@+id/progressBar"

android:layout_width="40dp"

android:layout_height="40dp"

android:layout_gravity="center_vertical"

android:layout_centerVertical="true"

android:background="@drawable/bitmap"

android:indeterminateDrawable="@drawable/progress_small" />

<rotate xmlns:android="http://schemas.android.com/apk/res/android"

android:drawable="@drawable/circle"

android:pivotX="50%"

android:pivotY="50%"

android:fromDegrees="0"

android:toDegrees="360" />