Android仿微信雷达扫描

作者: 程序亦非猿580230 | 来源:发表于2017-05-23 15:26 被阅读216次

    废话不多说 先上图(用AS录制的 转换工具不是很好 所以看得效果不是很好)

    gif5新文件.gif

    Activity 代码

    public class ShapeDrawableActivity extends AppCompatActivity {
        private ImageView ivLightbeam;
    
        private ObjectAnimator radarScanAnim;   // 扫描动画
    
        private int width;
        private int height;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
    
            setContentView(R.layout.activity_shape_drawable);
            ivLightbeam = (ImageView) findViewById(R.id.ivLightbeam);
        }
    
    
        @Override
        protected void onResume() {
            super.onResume();
            startScan();
        }
    
        @Override
        public void onWindowFocusChanged(boolean hasFocus) {
            super.onWindowFocusChanged(hasFocus);
            if (height == 0 || width == 0) {            //获取屏幕长、宽
                width = ScreenUtils.getScreenWidth(this);
                height = ScreenUtils.getScreenHeight(this);            //根据屏幕长、宽计算扫描圆的直径
                int diameter = (int) Math.sqrt(Math.pow(height, 2) + Math.pow(width, 2));            //修改光束的大小,使光束可以扫描到整个屏幕
                FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(diameter, diameter);
                ivLightbeam.setLayoutParams(layoutParams);            //将扫描光束的中心移至屏幕内容中心
                int offsetX = (width - diameter) / 2;
                int offsetY = (height - diameter) / 2 + ScreenUtils.getStatusHeight(this) / 2;
                ivLightbeam.setX(offsetX);
                ivLightbeam.setY(offsetY);
            }
        }
    
        @Override
        protected void onPause() {
            super.onPause();
            stopScan();
        }    // 开始扫描
    
        private void startScan() {
            radarScanAnim = ObjectAnimator.ofFloat(ivLightbeam, "rotation", 0f, 360f);
            radarScanAnim.setDuration(2000);    //2秒扫描一圈
            radarScanAnim.setInterpolator(new LinearInterpolator());
            radarScanAnim.setRepeatCount(ObjectAnimator.INFINITE);//循环扫描
    
            ivLightbeam.setVisibility(View.VISIBLE);
            radarScanAnim.start();
        }   // 停止扫描
    
        private void stopScan() {
            ivLightbeam.setVisibility(View.GONE);
            radarScanAnim.end();
        }
    }
    
    
    

    Activity 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:background="#FA000000"
        android:clipToPadding="false"
        android:fitsSystemWindows="true">
    
        <ImageView
            android:id="@+id/ivWave"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_margin="5dp"
            android:src="@drawable/wave" />
    
        <ImageView
            android:id="@+id/ivLightbeam"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:src="@drawable/light_beam" />
    
    </FrameLayout>
    

    绘制扫描光束

    <shape
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="oval">
    
        <size
            android:width="500dp"
            android:height="500dp" />
    
        <gradient
            android:endColor="#AAAAAAAA"
            android:startColor="#00000000"
            android:type="sweep"
            />
    </shape>
    
    

    绘制雷达波纹

    <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
        <item>
            <!--最外层圆圈-->
            <shape android:shape="oval">
                <solid android:color="#10FFFFFF" />
                <size
                    android:width="600dp"
                    android:height="600dp" />
                <stroke
                    android:color="#10B8B8B8"
                    android:dashWidth="1dp" />
            </shape>
        </item>
    
        <item
            android:bottom="100dp"
            android:left="100dp"
            android:right="100dp"
            android:top="100dp">
            <!--最中间层圆圈-->
            <shape android:shape="oval">
                <solid android:color="#1CFFFFFF" />
                <stroke
                    android:color="#1CB8B8B8"
                    android:dashWidth="1dp" />
            </shape>
        </item>
    
        <item
            android:bottom="200dp"
            android:left="200dp"
            android:right="200dp"
            android:top="200dp">
    
            <!--最中心圆圈-->
            <shape android:shape="oval">
                <solid android:color="#2CFFFFFF" />
                <stroke
                    android:color="#2CB8B8B8"
                    android:dashWidth="1dp" />
            </shape>
        </item>
    </layer-list>
    

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