diff --git a/app/src/main/java/org/fdroid/fdroid/views/FixAppBarLayoutBehavior.java b/app/src/main/java/org/fdroid/fdroid/views/FixAppBarLayoutBehavior.java new file mode 100644 index 000000000..6103dc930 --- /dev/null +++ b/app/src/main/java/org/fdroid/fdroid/views/FixAppBarLayoutBehavior.java @@ -0,0 +1,64 @@ +/* + * Copyright (C) 2017 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.fdroid.fdroid.views; + +import android.content.Context; +import android.support.design.widget.AppBarLayout; +import android.support.design.widget.CoordinatorLayout; +import android.support.v4.view.ViewCompat; +import android.util.AttributeSet; +import android.view.View; + +/** + * Workaround AppBarLayout.Behavior for https://issuetracker.google.com/66996774 + * Source: https://gist.github.com/chrisbanes/8391b5adb9ee42180893300850ed02f2 + */ +public class FixAppBarLayoutBehavior extends AppBarLayout.Behavior { + + public FixAppBarLayoutBehavior() { + super(); + } + + public FixAppBarLayoutBehavior(Context context, AttributeSet attrs) { + super(context, attrs); + } + + @Override + public void onNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, View target, + int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int type) { + super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, + dxUnconsumed, dyUnconsumed, type); + stopNestedScrollIfNeeded(dyUnconsumed, child, target, type); + } + + @Override + public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, + View target, int dx, int dy, int[] consumed, int type) { + super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type); + stopNestedScrollIfNeeded(dy, child, target, type); + } + + private void stopNestedScrollIfNeeded(int dy, AppBarLayout child, View target, int type) { + if (type == ViewCompat.TYPE_NON_TOUCH) { + final int currOffset = getTopAndBottomOffset(); + if ((dy < 0 && currOffset == 0) + || (dy > 0 && currOffset == -child.getTotalScrollRange())) { + ViewCompat.stopNestedScroll(target, ViewCompat.TYPE_NON_TOUCH); + } + } + } +} diff --git a/app/src/main/res/layout/app_details2.xml b/app/src/main/res/layout/app_details2.xml index c7428d958..86ca16e44 100644 --- a/app/src/main/res/layout/app_details2.xml +++ b/app/src/main/res/layout/app_details2.xml @@ -14,7 +14,8 @@ android:layout_width="match_parent" android:layout_height="@dimen/app_bar_height" android:fitsSystemWindows="true" - android:theme="@style/AppThemeLight.AppBarOverlay"> + android:theme="@style/AppThemeLight.AppBarOverlay" + app:layout_behavior="org.fdroid.fdroid.views.FixAppBarLayoutBehavior">