如何從GradientDrawable獲取顏色？

Question

我有一個XML文件中定義的背景的EditText：

<EditText 
    android:id="@+id/myEditText" 
    style="@style/Theme.x.EditText.ReadOnly" 
    android:layout_marginRight="5dip" 
    android:layout_span="7" 
    android:nextFocusDown="@+id/myEditText2" 
    android:selectAllOnFocus="true" /> 

xml文件：my_edit_text.xml：

<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
    android:shape="rectangle"> 
    <gradient android:startColor="@android:color/background_dark" android:endColor="@android:color/background_dark" 
     android:angle="0"/> 
    <solid android:color="#FA0000"/> 
    <stroke android:width="1px" android:color="#5A5D5A"/> 
    <corners 
     android:bottomLeftRadius="3dip" 
     android:topLeftRadius="3dip" 
     android:bottomRightRadius="3dip" 
     android:topRightRadius="3dip" 
     android:color="@color/crAmarelo"/> 
    <padding 
     android:left="5dip" 
     android:right="5dip"/> 
</shape> 

，我需要得到該視圖有顏色：

EditText et = (EditText) solo.getView(R.id.myEditText); 
GradientDrawable gd = (GradientDrawable) et.getBackground(); 

但我不知道如何從GradientDrawable獲得純色。

Answer 1

您可以參考GradientDrawable.java然後做一些適當的修改，以使其工作〜

import android.content.res.Resources; 
... 

// it's the same with the GradientDrawable, just make some proper modification to make it compilable 
public class ColorGradientDrawable extends Drawable { 
    ... 
    private int mColor; // this is the color which you try to get 
    ... 
    // original setColor function with little modification 
    public void setColor(int argb) { 
     mColor = argb; 
     mGradientState.setSolidColor(argb); 
     mFillPaint.setColor(argb); 
     invalidateSelf(); 
    } 

    // that's how I get the color from this drawable class 
    public int getColor() { 
     return mColor; 
    } 
    ... 

    // it's the same with GradientState, just make some proper modification to make it compilable 
    final public static class GradientState extends ConstantState { 
     ... 
    } 
}