c++实现安卓手机全屏幕遮罩
时间: 2023-10-30 15:27:13 浏览: 48
你可以使用 Android 的 WindowManager 类来实现全屏幕遮罩。以下是一个基本的示例代码:
```java
import android.app.Activity;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.Gravity;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.FrameLayout;
public class FullScreenOverlayActivity extends Activity {
private FrameLayout overlayLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 创建一个透明的全屏幕遮罩视图
overlayLayout = new FrameLayout(this);
overlayLayout.setBackgroundColor(Color.parseColor("#80000000")); // 设置遮罩颜色为半透明黑色
overlayLayout.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
// 将遮罩视图添加到窗口层级中
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY, // 设置窗口类型为悬浮窗口(需要悬浮窗权限)
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, // 设置窗口不需要获取焦点
PixelFormat.TRANSLUCENT); // 设置窗口背景为透明
params.gravity = Gravity.TOP | Gravity.START;
WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
windowManager.addView(overlayLayout, params);
}
@Override
protected void onDestroy() {
super.onDestroy();
// 在 Activity 销毁时移除遮罩视图
if (overlayLayout != null) {
WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
windowManager.removeView(overlayLayout);
}
}
}
```
请注意,此代码需要悬浮窗权限才能正常工作。在 AndroidManifest.xml 文件中添加以下权限:
```xml
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
```
然后在你的 Activity 中启动 FullScreenOverlayActivity:
```java
Intent intent = new Intent(this, FullScreenOverlayActivity.class);
startActivity(intent);
```
这样就可以在安卓手机上实现全屏幕遮罩了。希望对你有帮助!如果有任何问题,请随时向我提问。