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      1 /*
      2  * Copyright (C) 2016 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 android.content.res;
     18 
     19 import android.annotation.ColorInt;
     20 import android.content.res.Resources.Theme;
     21 import android.graphics.Color;
     22 
     23 /**
     24  * Defines an abstract class for the complex color information, like
     25  * {@link android.content.res.ColorStateList} or {@link android.content.res.GradientColor}
     26  * @hide
     27  */
     28 public abstract class ComplexColor {
     29     private int mChangingConfigurations;
     30 
     31     /**
     32      * @return {@code true}  if this ComplexColor changes color based on state, {@code false}
     33      * otherwise.
     34      */
     35     public boolean isStateful() { return false; }
     36 
     37     /**
     38      * @return the default color.
     39      */
     40     @ColorInt
     41     public abstract int getDefaultColor();
     42 
     43     /**
     44      * @hide only for resource preloading
     45      *
     46      */
     47     public abstract ConstantState<ComplexColor> getConstantState();
     48 
     49     /**
     50      * @hide only for resource preloading
     51      */
     52     public abstract boolean canApplyTheme();
     53 
     54     /**
     55      * @hide only for resource preloading
     56      */
     57     public abstract ComplexColor obtainForTheme(Theme t);
     58 
     59     /**
     60      * @hide only for resource preloading
     61      */
     62     final void setBaseChangingConfigurations(int changingConfigurations) {
     63         mChangingConfigurations = changingConfigurations;
     64     }
     65 
     66     /**
     67      * Returns a mask of the configuration parameters for which this color
     68      * may change, requiring that it be re-created.
     69      *
     70      * @return a mask of the changing configuration parameters, as defined by
     71      *         {@link android.content.pm.ActivityInfo}
     72      *
     73      * @see android.content.pm.ActivityInfo
     74      */
     75     public int getChangingConfigurations() {
     76         return mChangingConfigurations;
     77     }
     78 }
     79