Android 12systemui手势截图代码路径

Android 12 的 SystemUI 手势截图代码路径为：

frameworks/base/packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java

其中，`takeScreenshot` 方法是实现截图的核心方法。该方法会根据不同的截图模式，调用不同的截图逻辑。例如，全屏截图模式会调用 `takeScreenshotFullscreen` 方法，局部截图模式则会调用 `takeScreenshotPartial` 方法。你可以在该文件中查看具体实现细节。

相关问题

Android 12systemui手势截图代码

以下是 Android 12 SystemUI 中手势截图的相关代码：

1. 在 `PhoneWindowManager.java` 文件中添加以下方法：

private void handleThreeFingerGesture() {
    mHasThreeFingerGesture = true;
    if (mScreenshotChordEnabled && !mScreenOnFully && !mWindowManagerFuncs.isKeyguardLocked()) {
        if (mVolumeDownKeyTriggered && !mPowerKeyTriggered) {
            // If the volume down button was already triggered, capture the screen now.
            mVolumeDownKeyTriggered = false;
            mPowerManagerWrapper.goToSleep(SystemClock.uptimeMillis(), PowerManager.GO_TO_SLEEP_REASON_GESTURE, 0);
            takeScreenshot(true, true);
        } else {
            mVolumeDownKeyTriggered = true;
            mVolumeDownKeyTime = SystemClock.uptimeMillis();
            mVolumeDownKeyConsumedByGestures = true;
        }
    }
}

2. 在 `PhoneWindowManager.java` 文件的 `interceptMotionBeforeQueueingNonInteractive()` 方法中添加以下代码：

case MotionEvent.ACTION_POINTER_DOWN: {
    final int pointerCount = motionEvent.getPointerCount();
    if (pointerCount == 3) {
        handleThreeFingerGesture();
    }
    break;
}

3. 在 `ScreenshotHelper.java` 文件中添加以下方法：

public void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible) {
    takeScreenshot(finisher, statusBarVisible, navBarVisible, false, true);
}

public void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible, boolean isPartial, boolean showToast) {
    // Call the takeScreenshot method with the necessary parameters.
    takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, null, true);
}

public void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible, boolean isPartial, boolean showToast, Rect crop, boolean nonInteractive) {
    // Call the appropriate method based on the value of nonInteractive parameter.
    if (nonInteractive) {
        takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop);
    } else {
        takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop, false /* screenSecure */);
    }
}

public void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible, boolean isPartial, boolean showToast, Rect crop, boolean screenSecure) {
    // Call the takeScreenshot method with the necessary parameters.
    takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop, screenSecure, true);
}

public void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible, boolean isPartial, boolean showToast, Rect crop, boolean screenSecure, boolean runnableFinisher) {
    // Call the appropriate method based on the value of runnableFinisher parameter.
    if (runnableFinisher) {
        takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop, screenSecure, true /* sensorShade */);
    } else {
        takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop, screenSecure, false /* sensorShade */);
    }
}

public void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible, boolean isPartial, boolean showToast, Rect crop, boolean screenSecure, boolean sensorShade) {
    // Call the appropriate method based on the value of sensorShade parameter.
    if (sensorShade) {
        takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop, screenSecure, true /* useSystemService */);
    } else {
        takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop, screenSecure, false /* useSystemService */);
    }
}

public void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible, boolean isPartial, boolean showToast, Rect crop, boolean screenSecure, boolean useSystemService) {
    // Call the takeScreenshot method with the necessary parameters.
    takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop, screenSecure, useSystemService, true /* showFlash */);
}

public void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible, boolean isPartial, boolean showToast, Rect crop, boolean screenSecure, boolean useSystemService, boolean showFlash) {
    // Call the appropriate method based on the value of useSystemService parameter.
    if (useSystemService) {
        takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop, screenSecure, showFlash, true /* useSecureFlag */);
    } else {
        takeScreenshot(finisher, statusBarVisible, navBarVisible, isPartial, showToast, crop, screenSecure, showFlash, false /* useSecureFlag */);
    }
}

public void takeScreenshot(Runnable finisher, boolean statusBarVisible, boolean navBarVisible, boolean isPartial, boolean showToast, Rect crop, boolean screenSecure, boolean showFlash, boolean useSecureFlag) {
    // Get the DisplayManager instance and call the appropriate method based on the value of isPartial parameter.
    final DisplayManager displayManager = (DisplayManager) mContext.getSystemService(Context.DISPLAY_SERVICE);
    if (displayManager == null) {
        return;
    }
    if (isPartial) {
        // Capture a partial screenshot.
        capturePartialScreenshot(statusBarVisible, navBarVisible, finisher, showFlash, useSecureFlag);
    } else {
        // Capture a full screenshot.
        final Display display = mContext.getDisplay();
        final int rot = display == null ? Surface.ROTATION_0 : display.getRotation();
        final int width = mDisplayMetrics.widthPixels;
        final int height = mDisplayMetrics.heightPixels;
        final int minLayer = HwFrameworkFactory.getHwNsdImpl().getMinLayer();
        final SurfaceControl sc = SurfaceControl.screenshot(new Rect(), width, height, minLayer, rot);
        if (sc == null) {
            if (finisher != null) {
                finisher.run();
            }
            return;
        }
        captureScreenshot(sc, finisher, showToast, showFlash, useSecureFlag, width, height, crop, statusBarVisible, navBarVisible, screenSecure);
    }
}

以上是 Android 12 SystemUI 中手势截图的相关代码。

Android 12systemui手势截图

要在Android 12上使用手势截图，请按照以下步骤操作：

1. 打开您要截图的屏幕。

2. 使用手势导航进行操作。

3. 当您准备好截图时，请将手指从屏幕底部向上滑动，并保持手指静止，直到出现“截图”选项。

4. 点击“截图”选项，系统会立即捕捉当前屏幕并将其保存到您的相册中。

注意：如果您在截图过程中移动了手指，系统将取消截图并返回到原始屏幕。