• 扫描动画

        RotateAnimation anim = new RotateAnimation(0, 360,
            Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
            0.5f);
        anim.setDuration(1000);//间隔时间
        anim.setRepeatCount(Animation.INFINITE);//无限循环
        anim.setInterpolator(new LinearInterpolator());//匀速循环,不停顿
        ivScanning.startAnimation(anim);
  

  • 自定义进度条样式

      1. 查看android系统对Progressbar样式的定义
    
      开发环境\platforms\android-16\data\res\values\styles.xml,搜索Widget.Holo.ProgressBar.Horizontal->progress_horizontal_holo_light
    
      2. 拷贝xml文件,修改成自己的图片
    
      <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
          <item
              android:id="@android:id/background"
              android:drawable="@drawable/security_progress_bg"/>
          <item
              android:id="@android:id/secondaryProgress"
              android:drawable="@drawable/security_progress">
          </item>
          <item
              android:id="@android:id/progress"
              android:drawable="@drawable/security_progress">
          </item>
      </layer-list>
    
      3. 将xml文件设置给Progressbar
    
      <ProgressBar
          android:id="@+id/progressBar1"
          style="?android:attr/progressBarStyleHorizontal"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_marginLeft="10dp"
          android:layout_marginRight="10dp"
          android:progress="50"
          android:layout_marginTop="5dp"
          android:progressDrawable="@drawable/custom_progress" />
    

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

<shape
    android:innerRadius="12dp"
    android:shape="ring"
    android:thickness="3dp"
    android:useLevel="false" >
    <gradient
        android:centerColor="#3f00"
        android:endColor="#f00"
        android:startColor="#fff" />
</shape>

</rotate>

<ProgressBar
android:id="@+id/pb_progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:indeterminateDrawable="@drawable/custom_progress"
android:visibility="invisible" />