[ChipDrawable] Support setting text color programmatically.

Resolves #2526

GIT_ORIGIN_REV_ID=d1f47b5aa0b823ae0915d4c7ae85417e7d0eddd5
PiperOrigin-RevId: 424632069

Author: pubiqq

lib/java/com/google/android/material/chip/ChipDrawable.java

@@ -42,6 +42,7 @@
 import android.graphics.drawable.RippleDrawable;
 import android.graphics.drawable.ShapeDrawable;
 import android.graphics.drawable.shapes.OvalShape;
+import android.os.Build.VERSION;
 import android.os.Build.VERSION_CODES;
 import androidx.appcompat.content.res.AppCompatResources;
 import android.text.TextUtils;
@@ -358,6 +359,14 @@ private void loadFromAttributes(
     float textSize = a.getDimension(
         R.styleable.Chip_android_textSize, textAppearance.getTextSize());
     textAppearance.setTextSize(textSize);
+
+    if (VERSION.SDK_INT < VERSION_CODES.M) {
+      // This is necessary to work around a bug that doesn't support themed color referenced in
+      // ColorStateList for API level < 23.
+      textAppearance.setTextColor(
+          MaterialResources.getColorStateList(context, a, R.styleable.Chip_android_textColor));
+    }
+
     setTextAppearance(textAppearance);
 
     int ellipsize = a.getInt(R.styleable.Chip_android_ellipsize, 0);
@@ -1381,6 +1390,18 @@ public void setTextSize(@Dimension float size) {
     }
   }
 
+  public void setTextColor(@ColorInt int color) {
+    setTextColor(ColorStateList.valueOf(color));
+  }
+
+  public void setTextColor(@Nullable ColorStateList color) {
+    TextAppearance textAppearance = getTextAppearance();
+    if (textAppearance != null) {
+      textAppearance.setTextColor(color);
+      invalidateSelf();
+    }
+  }
+
   /** Delegate interface to be implemented by Views that own a ChipDrawable. */
   public interface Delegate {
 

lib/java/com/google/android/material/chip/res/values/attrs.xml

@@ -47,10 +47,10 @@
 
     <!-- Text to display on the chip. -->
     <attr name="android:text"/>
-    <!-- Text color. -->
-    <attr name="android:textColor"/>
     <!-- Default appearance of text: color, typeface, size, and style. -->
     <attr name="android:textAppearance"/>
+    <!-- Text color. Overrides the color set in the textAppearance -->
+    <attr name="android:textColor"/>
     <!-- Text size. Overrides the size set in the textAppearance -->
     <attr name="android:textSize"/>
     <!-- If set, causes words that are longer than the view is wide to be ellipsized instead of