1/* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17package com.android.internal.widget; 18 19import android.annotation.Nullable; 20import android.content.Context; 21import android.util.AttributeSet; 22import android.view.View; 23import android.widget.LinearLayout; 24import android.widget.RemoteViews; 25 26/** 27 * A LinearLayout that sets it's height again after the last measure pass. This is needed for 28 * MessagingLayouts where groups need to be able to snap it's height to. 29 */ 30@RemoteViews.RemoteView 31public class RemeasuringLinearLayout extends LinearLayout { 32 33 public RemeasuringLinearLayout(Context context) { 34 super(context); 35 } 36 37 public RemeasuringLinearLayout(Context context, @Nullable AttributeSet attrs) { 38 super(context, attrs); 39 } 40 41 public RemeasuringLinearLayout(Context context, @Nullable AttributeSet attrs, 42 int defStyleAttr) { 43 super(context, attrs, defStyleAttr); 44 } 45 46 public RemeasuringLinearLayout(Context context, AttributeSet attrs, int defStyleAttr, 47 int defStyleRes) { 48 super(context, attrs, defStyleAttr, defStyleRes); 49 } 50 51 @Override 52 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 53 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 54 int count = getChildCount(); 55 int height = 0; 56 for (int i = 0; i < count; ++i) { 57 final View child = getChildAt(i); 58 if (child == null || child.getVisibility() == View.GONE) { 59 continue; 60 } 61 62 final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 63 height = Math.max(height, height + child.getMeasuredHeight() + lp.topMargin + 64 lp.bottomMargin); 65 } 66 setMeasuredDimension(getMeasuredWidth(), height); 67 } 68} 69