给ProgressBar 设置圆形进度条颜色

progressDialog = ProgressDialog.show(LoginActivity.this, null, "Loading", true, true);
//设置进度条颜色
progressDialog.setIndeterminateDrawable(getResources().getDrawable(R.drawable.progressbar));

<?xml version="1.0" encoding="utf-8"?>
<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:pivotX="50%" android:pivotY="50%"
android:fromDegrees="0"
android:toDegrees="360">

<shape
android:shape="ring"
android:innerRadiusRatio="3"
android:thicknessRatio="8"
android:useLevel="false">

<gradient
android:type="sweep"
android:useLevel="false"
android:startColor="#ffffff"
android:centerColor="#397eff"
android:centerY="0.50"
android:endColor="#395eff" />

</shape>
</animated-rotate>