Android怎么在service中获取屏幕的宽高
时间: 2024-05-01 08:19:41 浏览: 16
在Service中可以使用WindowManager来获取屏幕的宽高。
具体实现如下:
1. 在Service中获取WindowManager对象:
```
WindowManager windowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
```
2. 通过WindowManager对象获取屏幕的宽高:
```
DisplayMetrics metrics = new DisplayMetrics();
windowManager.getDefaultDisplay().getMetrics(metrics);
int screenWidth = metrics.widthPixels;
int screenHeight = metrics.heightPixels;
```
其中,DisplayMetrics中包含了屏幕的宽高像素等信息,通过getDefaultDisplay()方法获取屏幕的Display对象,再通过getMetrics()方法获取DisplayMetrics对象,最后可以获取到屏幕的宽高像素值。
相关问题
Android在Service中如何获取屏幕宽高
在Service中获取屏幕宽高可以通过以下步骤实现:
1. 在Service中创建一个WindowManager对象:
```
WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
```
2. 通过windowManager获取屏幕宽高:
```
DisplayMetrics displayMetrics = new DisplayMetrics();
windowManager.getDefaultDisplay().getMetrics(displayMetrics);
int screenWidth = displayMetrics.widthPixels;
int screenHeight = displayMetrics.heightPixels;
```
这样就可以获取到屏幕的宽度和高度。注意,获取屏幕宽高的代码需要在Service的onCreate方法或其他方法中调用。
android获取屏幕显示内容
Android获取屏幕显示内容有两种方式:
1. 使用MediaProjection API
使用MediaProjection API可以截屏并将屏幕上的内容转换为视频流,然后可以对视频流进行处理。以下是获取屏幕截图的代码示例:
```
private MediaProjectionManager mMediaProjectionManager;
private MediaProjection mMediaProjection;
private ImageReader mImageReader;
private void startScreenCapture() {
mMediaProjectionManager = (MediaProjectionManager) getSystemService(MEDIA_PROJECTION_SERVICE);
Intent captureIntent = mMediaProjectionManager.createScreenCaptureIntent();
startActivityForResult(captureIntent, REQUEST_CODE);
mImageReader = ImageReader.newInstance(width, height, PixelFormat.RGBA_8888, 2);
mMediaProjection = mMediaProjectionManager.getMediaProjection(resultCode, resultData);
mMediaProjection.createVirtualDisplay("ScreenCapture",
width, height, densityDpi,
DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
mImageReader.getSurface(), null, null);
}
private void stopScreenCapture() {
if (mMediaProjection != null) {
mMediaProjection.stop();
mMediaProjection = null;
}
if (mImageReader != null) {
mImageReader.close();
mImageReader = null;
}
}
```
2. 使用AccessibilityService
使用AccessibilityService可以获取屏幕上的所有视图,并对其进行操作。以下是获取屏幕上所有TextView的代码示例:
```
public class MyAccessibilityService extends AccessibilityService {
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED) {
AccessibilityNodeInfo rootNode = getRootInActiveWindow();
if (rootNode != null) {
List<AccessibilityNodeInfo> textViews = rootNode.findAccessibilityNodeInfosByViewId("android:id/text1");
for (AccessibilityNodeInfo textView : textViews) {
Log.d(TAG, "TextView text: " + textView.getText());
}
}
}
}
@Override
public void onInterrupt() {}
@Override
protected void onServiceConnected() {
super.onServiceConnected();
AccessibilityServiceInfo config = new AccessibilityServiceInfo();
config.eventTypes = AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED;
config.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
config.flags = AccessibilityServiceInfo.DEFAULT;
setServiceInfo(config);
}
}
```
需要注意的是,使用AccessibilityService获取屏幕内容需要用户授权。