本文主要給大家介紹的是關于Android實現微信雷達掃描效果的相關內容,分享出來供大家參考學習,下面來看看詳細的介紹:
廢話不多說 先上圖(用AS錄制的 轉換工具不是很好 所以看得效果不是很好)
效果圖

示例代碼
Activity 代碼
public class ShapeDrawableActivity extends AppCompatActivity {
private ImageView ivLightbeam;
private ObjectAnimator radarScanAnim; // 掃描動畫
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) { //獲取屏幕長、寬
width = ScreenUtils.getScreenWidth(this);
height = ScreenUtils.getScreenHeight(this); //根據屏幕長、寬計算掃描圓的直徑
int diameter = (int) Math.sqrt(Math.pow(height, 2) + Math.pow(width, 2)); //修改光束的大小,使光束可以掃描到整個屏幕
FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(diameter, diameter);
ivLightbeam.setLayoutParams(layoutParams); //將掃描光束的中心移至屏幕內容中心
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();
} // 開始掃描
private void startScan() {
radarScanAnim = ObjectAnimator.ofFloat(ivLightbeam, "rotation", 0f, 360f);
radarScanAnim.setDuration(2000); //2秒掃描一圈
radarScanAnim.setInterpolator(new LinearInterpolator());
radarScanAnim.setRepeatCount(ObjectAnimator.INFINITE);//循環掃描
ivLightbeam.setVisibility(View.VISIBLE);
radarScanAnim.start();
} // 停止掃描
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>
繪制掃描光束
<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>
繪制雷達波紋
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<!--最外層圓圈-->
<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">
<!--最中間層圓圈-->
<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">
<!--最中心圓圈-->
<shape android:shape="oval">
<solid android:color="#2CFFFFFF" />
<stroke
android:color="#2CB8B8B8"
android:dashWidth="1dp" />
</shape>
</item>
</layer-list>
總結
以上就是這篇文章的全部內容了,希望本文的內容對大家的學習或者工作能帶來一定的幫助,如果有疑問大家可以留言交流,謝謝大家對億速云的支持。
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