1 /* 2 * Copyright (C) 2014 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 17 package androidx.appcompat.widget; 18 19 import android.content.Context; 20 import android.graphics.Bitmap; 21 import android.util.AttributeSet; 22 import android.view.View; 23 import android.widget.RatingBar; 24 25 import androidx.appcompat.R; 26 27 /** 28 * A {@link RatingBar} which supports compatible features on older versions of the platform. 29 * 30 * <p>This will automatically be used when you use {@link RatingBar} in your layouts 31 * and the top-level activity / dialog is provided by 32 * <a href="{@docRoot}topic/libraries/support-library/packages.html#v7-appcompat">appcompat</a>. 33 * You should only need to manually use this class when writing custom views.</p> 34 */ 35 public class AppCompatRatingBar extends RatingBar { 36 37 private final AppCompatProgressBarHelper mAppCompatProgressBarHelper; 38 AppCompatRatingBar(Context context)39 public AppCompatRatingBar(Context context) { 40 this(context, null); 41 } 42 AppCompatRatingBar(Context context, AttributeSet attrs)43 public AppCompatRatingBar(Context context, AttributeSet attrs) { 44 this(context, attrs, R.attr.ratingBarStyle); 45 } 46 AppCompatRatingBar(Context context, AttributeSet attrs, int defStyleAttr)47 public AppCompatRatingBar(Context context, AttributeSet attrs, int defStyleAttr) { 48 super(context, attrs, defStyleAttr); 49 50 mAppCompatProgressBarHelper = new AppCompatProgressBarHelper(this); 51 mAppCompatProgressBarHelper.loadFromAttributes(attrs, defStyleAttr); 52 } 53 54 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)55 protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 56 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 57 58 Bitmap sampleTile = mAppCompatProgressBarHelper.getSampleTime(); 59 if (sampleTile != null) { 60 final int width = sampleTile.getWidth() * getNumStars(); 61 setMeasuredDimension(View.resolveSizeAndState(width, widthMeasureSpec, 0), 62 getMeasuredHeight()); 63 } 64 } 65 66 } 67