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 androidx.core.widget; 18 19import android.content.res.ColorStateList; 20import android.graphics.PorterDuff; 21import android.graphics.drawable.Drawable; 22import android.os.Build; 23import android.widget.ImageView; 24 25import androidx.annotation.NonNull; 26import androidx.annotation.Nullable; 27 28/** 29 * Helper for accessing features in {@link ImageView}. 30 */ 31public class ImageViewCompat { 32 /** 33 * Return the tint applied to the image drawable, if specified. 34 */ 35 @Nullable 36 public static ColorStateList getImageTintList(@NonNull ImageView view) { 37 if (Build.VERSION.SDK_INT >= 21) { 38 return view.getImageTintList(); 39 } 40 return (view instanceof TintableImageSourceView) 41 ? ((TintableImageSourceView) view).getSupportImageTintList() 42 : null; 43 } 44 45 /** 46 * Applies a tint to the image drawable. 47 */ 48 public static void setImageTintList(@NonNull ImageView view, 49 @Nullable ColorStateList tintList) { 50 if (Build.VERSION.SDK_INT >= 21) { 51 view.setImageTintList(tintList); 52 53 if (Build.VERSION.SDK_INT == 21) { 54 // Work around a bug in L that did not update the state of the image source 55 // after applying the tint 56 Drawable imageViewDrawable = view.getDrawable(); 57 boolean hasTint = (view.getImageTintList() != null) 58 && (view.getImageTintMode() != null); 59 if ((imageViewDrawable != null) && hasTint) { 60 if (imageViewDrawable.isStateful()) { 61 imageViewDrawable.setState(view.getDrawableState()); 62 } 63 view.setImageDrawable(imageViewDrawable); 64 } 65 } 66 } else if (view instanceof TintableImageSourceView) { 67 ((TintableImageSourceView) view).setSupportImageTintList(tintList); 68 } 69 } 70 71 /** 72 * Return the blending mode used to apply the tint to the image drawable, if specified. 73 */ 74 @Nullable 75 public static PorterDuff.Mode getImageTintMode(@NonNull ImageView view) { 76 if (Build.VERSION.SDK_INT >= 21) { 77 return view.getImageTintMode(); 78 } 79 return (view instanceof TintableImageSourceView) 80 ? ((TintableImageSourceView) view).getSupportImageTintMode() 81 : null; 82 } 83 84 /** 85 * Specifies the blending mode used to apply the tint specified by 86 * {@link #setImageTintList(android.widget.ImageView, android.content.res.ColorStateList)} 87 * to the image drawable. The default mode is {@link PorterDuff.Mode#SRC_IN}. 88 */ 89 public static void setImageTintMode(@NonNull ImageView view, @Nullable PorterDuff.Mode mode) { 90 if (Build.VERSION.SDK_INT >= 21) { 91 view.setImageTintMode(mode); 92 93 if (Build.VERSION.SDK_INT == 21) { 94 // Work around a bug in L that did not update the state of the image source 95 // after applying the tint 96 Drawable imageViewDrawable = view.getDrawable(); 97 boolean hasTint = (view.getImageTintList() != null) 98 && (view.getImageTintMode() != null); 99 if ((imageViewDrawable != null) && hasTint) { 100 if (imageViewDrawable.isStateful()) { 101 imageViewDrawable.setState(view.getDrawableState()); 102 } 103 view.setImageDrawable(imageViewDrawable); 104 } 105 } 106 } else if (view instanceof TintableImageSourceView) { 107 ((TintableImageSourceView) view).setSupportImageTintMode(mode); 108 } 109 } 110 111 private ImageViewCompat() {} 112} 113