1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file 5 * except in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the 10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 11 * KIND, either express or implied. See the License for the specific language governing 12 * permissions and limitations under the License. 13 */ 14 15 package com.android.settings.widget; 16 17 import android.content.Context; 18 import android.content.res.TypedArray; 19 import android.util.AttributeSet; 20 import android.widget.FrameLayout; 21 22 import com.android.settings.R; 23 24 /** 25 * A {@link FrameLayout} with customizable aspect ration. 26 * This is used to avoid dynamically calculating the height for the frame. Default aspect 27 * ratio will be 1 if none is set in layout attribute. 28 */ 29 public final class AspectRatioFrameLayout extends FrameLayout { 30 31 private float mAspectRatio = 1.0f; 32 AspectRatioFrameLayout(Context context)33 public AspectRatioFrameLayout(Context context) { 34 this(context, null); 35 } 36 AspectRatioFrameLayout(Context context, AttributeSet attrs)37 public AspectRatioFrameLayout(Context context, AttributeSet attrs) { 38 this(context, attrs, 0); 39 } 40 AspectRatioFrameLayout(Context context, AttributeSet attrs, int defStyle)41 public AspectRatioFrameLayout(Context context, AttributeSet attrs, int defStyle) { 42 super(context, attrs, defStyle); 43 if (attrs != null) { 44 TypedArray array = 45 context.obtainStyledAttributes(attrs, R.styleable.AspectRatioFrameLayout); 46 mAspectRatio = array.getFloat( 47 R.styleable.AspectRatioFrameLayout_aspectRatio, 1.0f); 48 array.recycle(); 49 } 50 } 51 52 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)53 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 54 super.onMeasure(widthMeasureSpec, (int) (widthMeasureSpec / mAspectRatio)); 55 } 56 57 } 58