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();
- }
- }
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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>
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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>
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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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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,谢谢大家对程序员之家的支持。 |