android 用shape画 圆 雷达扫描效果

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

android:duration="6000">

</rotate>

shape 代码
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:innerRadiusRatio="3"
android:shape="rectangle"
android:thicknessRatio="8"
android:useLevel="false" >

<size
android:height="48dip"
android:width="48dip" />

<corners android:radius="230dp" />

<gradient
android:centerColor="#4C394D61"
android:centerY="0.50"
android:endColor="#B9B9B9"
android:startColor="#4C394D61"
android:type="sweep"
android:useLevel="false" />

</shape>

主界面布局文件
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:background="#345323"
tools:context=".MainActivity" >

<ImageView
android:id="@+id/imageView1"
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_gravity="center"
android:background="@drawable/per_shape"
/>

<ImageView
android:id="@+id/imageView2"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center"
android:background="@drawable/per_shape2"
/>
<ImageView
android:id="@+id/imageView3"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="center"
android:background="@drawable/per_shape3"
/>
<ImageView
android:id="@+id/image"
android:layout_width="300dp"
android:layout_height="0.1dp"
android:layout_gravity="center"
android:background="#DCDCDC"
/>
<ImageView
android:id="@+id/image2"
android:layout_width="0.1dp"
android:layout_height="300dp"
android:layout_gravity="center"
android:background="#DCDCDC"
/>
<ImageView
android:id="@+id/imageView6"
android:layout_width="300dp"
android:layout_height="300dp"
android:alpha="0.5"
android:layout_gravity="center"
android:background="@drawable/per_shape_main"
/>

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"

android:text="Button" />

</FrameLayout>

java 代码
package com.example.android;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {
private Button mButton;
private ImageView mImageView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mButton = (Button) findViewById(R.id.button1);
mImageView = (ImageView) findViewById(R.id.imageView6);
mButton.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Animation animation = AnimationUtils.loadAnimation(
MainActivity.this, R.anim.image_rotate);
mImageView.startAnimation(animation);
}
});
}

}