92 lines
3.4 KiB
Java
92 lines
3.4 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.android.internal.widget;
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import android.annotation.Nullable;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.View;
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import android.widget.LinearLayout;
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import android.widget.RemoteViews;
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import java.util.ArrayList;
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/**
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* A LinearLayout that sets it's height again after the last measure pass. This is needed for
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* MessagingLayouts where groups need to be able to snap it's height to.
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*/
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@RemoteViews.RemoteView
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public class RemeasuringLinearLayout extends NotificationOptimizedLinearLayout {
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private ArrayList<View> mMatchParentViews = new ArrayList<>();
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public RemeasuringLinearLayout(Context context) {
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super(context);
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}
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public RemeasuringLinearLayout(Context context, @Nullable AttributeSet attrs) {
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super(context, attrs);
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}
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public RemeasuringLinearLayout(Context context, @Nullable AttributeSet attrs,
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int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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}
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public RemeasuringLinearLayout(Context context, AttributeSet attrs, int defStyleAttr,
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int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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int count = getChildCount();
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int height = 0;
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boolean isVertical = getOrientation() == LinearLayout.VERTICAL;
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boolean isWrapContent = getLayoutParams().height == LayoutParams.WRAP_CONTENT;
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for (int i = 0; i < count; ++i) {
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final View child = getChildAt(i);
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if (child == null || child.getVisibility() == View.GONE) {
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continue;
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}
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final LayoutParams lp = (LayoutParams) child.getLayoutParams();
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if (!isWrapContent || lp.height != LayoutParams.MATCH_PARENT || isVertical) {
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int childHeight = child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin;
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height = Math.max(height, isVertical ? height + childHeight : childHeight);
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} else {
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// We have match parent children in a wrap content view, let's measure the
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// view properly
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mMatchParentViews.add(child);
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}
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}
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if (mMatchParentViews.size() > 0) {
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int exactHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
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for (View child : mMatchParentViews) {
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child.measure(getChildMeasureSpec(
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widthMeasureSpec, getPaddingStart() + getPaddingEnd(),
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child.getLayoutParams().width),
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exactHeightSpec);
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}
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}
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mMatchParentViews.clear();
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setMeasuredDimension(getMeasuredWidth(), height);
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}
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}
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