Android7.1 锁屏滑动无法解锁 Notification Keyguard 显示通知锁屏

问题：屏幕太大，滑动距离太大，并且滑动不流畅导致无法解锁

Notification Keyguard 显示通知锁屏 显示分析

一般情况下解锁根据滑动Y距离的长度和速度，再根据一些因数处理，通过阀值完成解锁。

一.PaneView.java

frameworks\base\packages\SystemUI\src\com\android\systemui\statusbar\phone\PanelView.java

public boolean onTouchEvent(MotionEvent event) {  

          private int getFalsingThreshold() {

                      protected void loadDimens() {

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (mInstantExpanding || mTouchDisabled
                || (mMotionAborted && event.getActionMasked() != MotionEvent.ACTION_DOWN)) {
            return false;
        }

        // On expanding, single mouse click expands the panel instead of dragging.
        String platform = SystemProperties.get("ro.board.platform");
        if (isFullyCollapsed() && event.isFromSource(InputDevice.SOURCE_MOUSE)
                && !"rk312x".equals(platform) && !"rk3126c".equals(platform)
		&& !"rk3399".equals(platform)) {
            if (event.getAction() == MotionEvent.ACTION_UP) {
                expand(true);
            }
            return true;
        }

        /*
         * We capture touch events here and update the expand height here in case according to
         * the users fingers. This also handles multi-touch.
         *
         * If the user just clicks shortly, we show a quick peek of the shade.
         *
         * Flinging is also enabled in order to open or close the shade.
         */

        int pointerIndex = event.findPointerIndex(mTrackingPointer);
        if (pointerIndex < 0) {
            pointerIndex = 0;
            mTrackingPointer = event.getPointerId(pointerIndex);
        }
        final float x = event.getX(pointerIndex);
        final float y = event.getY(pointerIndex);

        if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
            mGestureWaitForTouchSlop = isFullyCollapsed() || hasConflictingGestures();
            mIgnoreXTouchSlop = isFullyCollapsed() || shouldGestureIgnoreXTouchSlop(x, y);
        }

        switch (event.getActionMasked()) {
            case MotionEvent.ACTION_DOWN:
                startExpandMotion(x, y, false /* startTracking */, mExpandedHeight);
                mJustPeeked = false;
                mPanelClosedOnDown = isFullyCollapsed();
                mHasLayoutedSinceDown = false;
                mUpdateFlingOnLayout = false;
                mMotionAborted = false;
                mPeekTouching = mPanelClosedOnDown;
                mTouchAboveFalsingThreshold = false;
                mCollapsedAndHeadsUpOnDown = isFullyCollapsed()
                        && mHeadsUpManager.hasPinnedHeadsUp();
                if (mVelocityTracker == null) {
                    initVelocityTracker();
                }
                trackMovement(event);
                if (!mGestureWaitForTouchSlop || (mHeightAnimator != null && !mHintAnimationRunning) ||
                        mPeekPending || mPeekAnimator != null) {
                    cancelHeightAnimator();
                    cancelPeek();
                    mTouchSlopExceeded = (mHeightAnimator != null && !mHintAnimationRunning)
                            || mPeekPending || mPeekAnimator != null;
                    onTrackingStarted();
                }
                if (isFullyCollapsed() && !mHeadsUpManager.hasPinnedHeadsUp()) {
                    schedulePeek();
                }
                break;

            case MotionEvent.ACTION_POINTER_UP:
                final int upPointer = event.getPointerId(event.getActionIndex());
                if (mTrackingPointer == upPointer) {
                    // gesture is ongoing, find a new pointer to track
                    final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1;
                    final float newY = event.getY(newIndex);
                    final float newX = event.getX(newIndex);
                    mTrackingPointer = event.getPointerId(newIndex);
                    startExpandMotion(newX, newY, true /* startTracking */, mExpandedHeight);
                }
                break;
            case MotionEvent.ACTION_POINTER_DOWN:
                if (mStatusBar.getBarState() == StatusBarState.KEYGUARD) {
                    mMotionAborted = true;
                    endMotionEvent(event, x, y, true /* forceCancel */);
                    return false;
                }
                break;
            case MotionEvent.ACTION_MOVE:
                float h = y - mInitialTouchY;

                // If the panel was collapsed when touching, we only need to check for the
                // y-component of the gesture, as we have no conflicting horizontal gesture.
                if (Math.abs(h) > mTouchSlop
                        && (Math.abs(h) > Math.abs(x - mInitialTouchX)
                                || mIgnoreXTouchSlop)) {
                    mTouchSlopExceeded = true;
                    if (mGestureWaitForTouchSlop && !mTracking && !mCollapsedAndHeadsUpOnDown) {
                        if (!mJustPeeked && mInitialOffsetOnTouch != 0f) {
                            startExpandMotion(x, y, false /* startTracking */, mExpandedHeight);
                            h = 0;
                        }
                        cancelHeightAnimator();
                        removeCallbacks(mPeekRunnable);
                        mPeekPending = false;
                        onTrackingStarted();
                    }
                }
                final float newHeight = Math.max(0, h + mInitialOffsetOnTouch);
                if (newHeight > mPeekHeight) {
                    if (mPeekAnimator != null) {
                        mPeekAnimator.cancel();
                    }
                    mJustPeeked = false;
                }
				Log.d("gatsby","-h ->"+-h+" getFalsingThreshold()->"+getFalsingThreshold());//This 
                if (-h >= getFalsingThreshold()) {
                    mTouchAboveFalsingThreshold = true;
                    mUpwardsWhenTresholdReached = isDirectionUpwards(x, y);
                }
                if (!mJustPeeked && (!mGestureWaitForTouchSlop || mTracking) && !isTrackingBlocked()) {
                    setExpandedHeightInternal(newHeight);
                }

                trackMovement(event);
                break;

            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL:
                trackMovement(event);
                endMotionEvent(event, x, y, false /* forceCancel */);
                break;
        }
        return !mGestureWaitForTouchSlop || mTracking;
    }

 这个阈值是在如下文件中定义的, 它是用下面的值乘以一个因子(1.5)之后得到这个Y-距离.

    private int getFalsingThreshold() {
        float factor = mStatusBar.isWakeUpComingFromTouch() ? 1.5f : 1.0f;
        return (int) (mUnlockFalsingThreshold * factor);
    }

 解析配置文件

    protected void loadDimens() {
        final Resources res = getContext().getResources();
        final ViewConfiguration configuration = ViewConfiguration.get(getContext());
        mTouchSlop = configuration.getScaledTouchSlop();
        mHintDistance = res.getDimension(R.dimen.hint_move_distance);
        mUnlockFalsingThreshold = res.getDimensionPixelSize(R.dimen.unlock_falsing_threshold);
    }

 二.Gatsby patch

diff --git a/frameworks/base/packages/SystemUI/res/values/dimens.xml b/frameworks/base/packages/SystemUI/res/values/dimens.xml
old mode 100644
new mode 100755
index e159501..630257c
--- a/frameworks/base/packages/SystemUI/res/values/dimens.xml
+++ b/frameworks/base/packages/SystemUI/res/values/dimens.xml
@@ -272,7 +272,7 @@
     <dimen name="speed_bump_height">16dp</dimen>
 
     <!-- Lockscreen unlocking falsing threshold. -->
-    <dimen name="unlock_falsing_threshold">80dp</dimen>
+    <dimen name="unlock_falsing_threshold">30dp</dimen>
 
     <!-- Lockscreen falsing threshold for quick settings. -->
     <dimen name="qs_falsing_threshold">60dp</dimen>
diff --git a/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java b/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
index 6587520..3c1bc53 100755
--- a/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
+++ b/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelView.java
@@ -331,6 +331,7 @@ public abstract class PanelView extends FrameLayout {
                     }
                     mJustPeeked = false;
                 }
+				Log.d("gatsby","-h ->"+-h+" getFalsingThreshold()->"+getFalsingThreshold());
                 if (-h >= getFalsingThreshold()) {
                     mTouchAboveFalsingThreshold = true;
                     mUpwardsWhenTresholdReached = isDirectionUpwards(x, y);