<?xml version="1.0" encoding="utf-8"?>

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

    android:id="@+id/layout_loading"

    android:orientation="vertical"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <RelativeLayout

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:gravity="center">

        <ProgressBar

            android:id="@+id/progress_bar"

            android:layout_width="100dp"

            android:layout_height="100dp"

            style="@style/progressbar_style"/>

        <TextView

            android:layout_width="100dp"

            android:layout_height="wrap_content"

            android:layout_below="@+id/progress_bar"

            android:lines="1"

            android:text="等待蓝牙连接……"

            android:textSize="8sp"

            android:gravity="center"/>

    </RelativeLayout>

</LinearLayout>

   <!-- loading 动画-->

    <style name="progressbar_style">

        <item name="android:maxWidth">50.0dip</item>

        <item name="android:maxHeight">50.0dip</item>

        <item name="android:indeterminateDrawable">@anim/anim_loading</item>

        <item name="android:minWidth">50.0dip</item>

        <item name="android:minHeight">50.0dip</item>

    </style>

<?xml version="1.0" encoding="utf-8"?>

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

    android:drawable="@drawable/loading"

    android:fromDegrees="-720"

    android:duration="400"

    android:toDegrees="0"

    android:pivotX="50.0%"

    android:pivotY="50.0%"/>