本文主要给大家介绍的是关于Android实现微信雷达扫描效果的相关内容，分享出来供大家参考学习，下面来看看详细的介绍：
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）
效果图
示例代码
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>
总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对脚本之家的支持。