Android 利用ClipDrawable 自定义进度条

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<ImageView
android:id="@+id/image"
android:layout_width="match_parent"
android:layout_height="12dp"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="10dp"
android:src="@drawable/drawable_inset"/>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<clip xmlns:android="http://schemas.android.com/apk/res/android"
android:clipOrientation="horizontal"
android:drawable="@drawable/progress_bar"
android:gravity="left">
</clip >

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@color/button_normal_color" />
<corners android:radius="8dp"/>
</shape>

public class Main2Activity extends Activity {

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.linear_test);
ImageView imageView = findViewById(R.id.image);
Drawable drawable = imageView.getDrawable();

ValueAnimator valueAnimator  =  ValueAnimator.ofInt(1,10000);
valueAnimator.setDuration(3000);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
drawable.setLevel((int)animation.getAnimatedValue());
}
});
valueAnimator.start();
}
}