Add support for LayerDrawable in parseGradientDrawable(drawable) (leandroBorgesFerreira#132)

* Add support for LayerDrawable in parseGradientDrawable(drawable)

It allows to apply a Button style (like "@style/Widget.AppCompat.Button") and have a ripple effect, and it avoids having to apply a custom background

* Don't use wildcard import

Author: cdongieux

app/src/main/java/br/com/simplepass/loadingbuttonsample/MainActivity.kt

@@ -20,6 +20,8 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
+        imgBtnTest0.run { setOnClickListener { morphDoneAndRevert(this@MainActivity) } }
+
         imgBtnTest1.run { setOnClickListener { morphDoneAndRevert(this@MainActivity) } }
         buttonTest1.run { setOnClickListener { morphDoneAndRevert(this@MainActivity) } }
 

app/src/main/res/layout/activity_main.xml

@@ -16,6 +16,27 @@
         android:paddingBottom="@dimen/activity_vertical_margin"
         tools:context="br.com.simplepass.loadingbuttonsample.MainActivity">
 
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:padding="8dp"
+            android:text="Test 0" />
+
+        <br.com.simplepass.loadingbutton.customViews.CircularProgressButton
+            style="@style/Widget.AppCompat.Button.Colored"
+            android:id="@+id/imgBtnTest0"
+            android:layout_width="match_parent"
+            android:layout_height="50dp"
+            android:layout_marginLeft="18dp"
+            android:layout_marginRight="18dp"
+            android:layout_marginBottom="10dp"
+            android:text="Test 0"
+            app:finalCornerAngle="50dp"
+            app:initialCornerAngle="0dp"
+            app:spinning_bar_color="#FFFFFF"
+            app:spinning_bar_padding="0dp"
+            app:spinning_bar_width="3dp" />
+
         <TextView
             android:layout_width="match_parent"
             android:layout_height="wrap_content"

loading-button-android/src/main/java/br/com/simplepass/loadingbutton/utils/Utils.kt

@@ -5,6 +5,7 @@ import android.graphics.drawable.ColorDrawable
 import android.graphics.drawable.Drawable
 import android.graphics.drawable.GradientDrawable
 import android.graphics.drawable.InsetDrawable
+import android.graphics.drawable.LayerDrawable
 import android.graphics.drawable.RippleDrawable
 import android.graphics.drawable.StateListDrawable
 import android.os.Build
@@ -42,6 +43,9 @@ internal fun parseGradientDrawable(drawable: Drawable): GradientDrawable =
                 throw RuntimeException("Error reading background... Use a shape or a color in xml!")
             }
         }
+        is LayerDrawable -> {
+            parseGradientDrawable(drawable.getDrawable(0))
+        }
         else -> throw RuntimeException("Error reading background... Use a shape or a color in xml!")
     }