自定义进度条

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

    <FrameLayout
        android:id="@+id/operation_volume_brightness"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:background="#00000000"
        android:orientation="horizontal"
        android:padding="0dip"
        android:visibility="invisible" >

        <ImageView
            android:id="@+id/operation_bg"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:src="@drawable/video_volumn_bg" />

        <FrameLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|center_horizontal"
            android:paddingBottom="25dip" >

            <ImageView
                android:id="@+id/operation_full"
                android:layout_width="94dip"
                android:layout_height="wrap_content"
                android:layout_gravity="left"
                android:src="@drawable/video_num_bg" />

            <ImageView
                android:id="@+id/operation_percent"
                android:layout_width="0dip"
                android:layout_height="wrap_content"
                android:layout_gravity="left"
                android:scaleType="matrix"
                android:src="@drawable/video_num_front" />
        </FrameLayout>
    </FrameLayout>
</RelativeLayout>


		// 变更进度条
	ViewGroup.LayoutParams lp = mOperationPercent.getLayoutParams();
	lp.width = findViewById(R.id.operation_full).getLayoutParams().width * 

index / mMaxVolume;
		

mOperationPercent.setLayoutParams(lp);