1 /* 2 * Copyright (C) 2014 Google Inc. 3 * Licensed to The Android Open Source Project. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package com.android.mail.ui; 19 20 import android.content.Context; 21 import android.graphics.Rect; 22 import android.util.AttributeSet; 23 import android.widget.ListView; 24 25 /** 26 * A list view that auto resizes depending on the height of the viewing frame. This means this 27 * list view will auto resize whenever the soft keyboard appears/disappears. 28 */ 29 public class AutoResizeListView extends ListView { 30 private final Rect mRect = new Rect(); 31 private final int[] mCoords = new int[2]; 32 33 public AutoResizeListView(Context context) { 34 this(context, null); 35 } 36 37 public AutoResizeListView(Context context, AttributeSet attrs) { 38 super(context, attrs); 39 } 40 41 @Override 42 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 43 getWindowVisibleDisplayFrame(mRect); 44 getLocationInWindow(mCoords); 45 46 // The desired height is the available height we have for VIEWING. 47 final int desiredHeight = mRect.bottom - mCoords[1]; 48 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 49 final int heightSize = MeasureSpec.getSize(heightMeasureSpec); 50 51 // Measure height and obey the measure mode. 52 final int height; 53 if (heightMode == MeasureSpec.EXACTLY) { 54 height = heightSize; 55 } else { 56 // For AT_MOST and UNSPECIFIED we always want to get the minimum. 57 height = Math.min(desiredHeight, heightSize); 58 } 59 60 // Compile back to measure spec and pass it along 61 heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, heightMode); 62 63 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 64 } 65 } 66
