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 import org.jspecify.annotations.NonNull; 28 import org.jspecify.annotations.Nullable; 29 30 /** 31 * A {@link RatingBar} which supports compatible features on older versions of the platform. 32 * 33 * <p>This will automatically be used when you use {@link RatingBar} in your layouts 34 * and the top-level activity / dialog is provided by 35 * <a href="{@docRoot}topic/libraries/support-library/packages.html#v7-appcompat">appcompat</a>. 36 * You should only need to manually use this class when writing custom views.</p> 37 */ 38 public class AppCompatRatingBar extends RatingBar { 39 40 private final AppCompatProgressBarHelper mAppCompatProgressBarHelper; 41 AppCompatRatingBar(@onNull Context context)42 public AppCompatRatingBar(@NonNull Context context) { 43 this(context, null); 44 } 45 AppCompatRatingBar(@onNull Context context, @Nullable AttributeSet attrs)46 public AppCompatRatingBar(@NonNull Context context, @Nullable AttributeSet attrs) { 47 this(context, attrs, R.attr.ratingBarStyle); 48 } 49 AppCompatRatingBar( @onNull Context context, @Nullable AttributeSet attrs, int defStyleAttr)50 public AppCompatRatingBar( 51 @NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) { 52 super(context, attrs, defStyleAttr); 53 54 ThemeUtils.checkAppCompatTheme(this, getContext()); 55 56 mAppCompatProgressBarHelper = new AppCompatProgressBarHelper(this); 57 mAppCompatProgressBarHelper.loadFromAttributes(attrs, defStyleAttr); 58 } 59 60 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)61 protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 62 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 63 64 Bitmap sampleTile = mAppCompatProgressBarHelper.getSampleTile(); 65 if (sampleTile != null) { 66 final int width = sampleTile.getWidth() * getNumStars(); 67 setMeasuredDimension(View.resolveSizeAndState(width, widthMeasureSpec, 0), 68 getMeasuredHeight()); 69 } 70 } 71 72 } 73