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Android 通过反射获取后台应用的快照

都在代码里了，如果无效注意反射要判断sdk版本

/*** 获取应用快照*/
public class SnapShotUtil {@RequiresApi(api = Build.VERSION_CODES.Q)public static Bitmap getTargetTaskShot(Activity activity, String pkgName) {PackageManager packageManager = activity.getPackageManager();ActivityManager activityManager = (ActivityManager) activity.getSystemService(Context.ACTIVITY_SERVICE);List<ActivityManager.RecentTaskInfo> recentTasks = activityManager.getRecentTasks(100, 1);for (ActivityManager.RecentTaskInfo recentTaskInfo : recentTasks) {ResolveInfo resolveActivity =packageManager.resolveActivity(recentTaskInfo.baseIntent, 0);if (resolveActivity == null || resolveActivity.activityInfo == null) {continue;}String str = resolveActivity.activityInfo.packageName;if (!Objects.equals(str, pkgName)) {continue;}try {Object activityTaskManagerService = getActivityTaskManagerService();Object taskSnapshot = getTaskSnapshot(activityTaskManagerService, recentTaskInfo);Object snapshot = getSnapshot(taskSnapshot);Object hardwareBuffer = getHardwareBuffer(snapshot);Object colorSpace = getColorSpace(taskSnapshot);return Bitmap.wrapHardwareBuffer((HardwareBuffer) hardwareBuffer, (ColorSpace) colorSpace);} catch (ClassNotFoundException | NoSuchMethodException | InvocationTargetException |IllegalAccessException | NoSuchFieldException e) {e.printStackTrace();}}return null;}@SuppressLint("PrivateApi")private static Object getActivityTaskManagerService() throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {Class<?> clazz = Class.forName("android.app.ActivityTaskManager");Method getServiceMethod = clazz.getMethod("getService");getServiceMethod.setAccessible(true);return getServiceMethod.invoke(null);}@RequiresApi(api = Build.VERSION_CODES.Q)private static Object getTaskSnapshot(Object object, ActivityManager.RecentTaskInfo recentTaskInfo) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {Class<?> clazz = object.getClass();Method getTaskSnapshotMethod = clazz.getMethod("getTaskSnapshot", int.class, boolean.class);getTaskSnapshotMethod.setAccessible(true);return getTaskSnapshotMethod.invoke(object, recentTaskInfo.taskId, true);}private static Object getSnapshot(Object taskSnapshot) throws NoSuchFieldException, IllegalAccessException {Class<?> clazz = taskSnapshot.getClass();Field mSnapshotField = clazz.getDeclaredField("mSnapshot");mSnapshotField.setAccessible(true);return mSnapshotField.get(taskSnapshot);}private static Object getColorSpace(Object taskSnapshot) throws NoSuchFieldException, IllegalAccessException {Class<?> clazz = taskSnapshot.getClass();Field mColorSpaceField = clazz.getDeclaredField("mColorSpace");mColorSpaceField.setAccessible(true);return mColorSpaceField.get(taskSnapshot);}private static Object getHardwareBuffer(Object graphicBuffer) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {Class<?> clazz = HardwareBuffer.class;Method createFromGraphicBufferMethod = clazz.getMethod("createFromGraphicBuffer", graphicBuffer.getClass());return createFromGraphicBufferMethod.invoke(null, graphicBuffer);}