Tint bitmap in layer-list

Question

No longer relevant! This issue is related to a bug in old Android 4.x build. android:tint should now work correctly as in the example below

I'm trying to apply tint to bitmap inside < layer-list >

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
        <shape  xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval">
            <solid android:color="@color/grey" />
            <size android:width="45dp" android:height="45dp"/>
        </shape>
    </item>
    <item android:left="5dp" android:right="5dp" android:top="5dp" android:bottom="5dp">
        <bitmap android:src="@drawable/ic_action" android:tint="#FF000000"   />
    </item>
</layer-list>

Preview shows that it should work, FROM ANDROID-STUDIO:

But it doesn't tint when deployed on device:

It does tint correctly if i use ImageView in my layout, but fails with layer-list. I believe I have tried every tintMode with no results.

Answer 1

For anyone else that may come across this question. This is what I did.

Setup

• Android Studio 2.3.2

• Windows 10

  Gradle

• minSdkVersion 15

• targetSdkVersion 25
• compile 'com.android.support:appcompat-v7:25.3.1'

Test Devices

• Asus Padfone X Android v4.4.2
• Samsung Galaxy S3 Android v6.0
• Samsung Galaxy S7 Android v7.0

Layer Drawable I added android:id=@+id/bitmapID to the item containing the bitmap

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
        <shape android:shape="oval">
            <solid android:color="#9e9e9e" />
            <size android:width="45dp" android:height="45dp"/>
        </shape>
    </item>
    <item
        android:id="@+id/tintDrawableImg"
        android:left="5dp"
        android:right="5dp"
        android:top="5dp"
        android:bottom="5dp">
        <bitmap android:src="@mipmap/ic_pencil" android:tint="#860000"   />
    </item>
</layer-list>

Activity Layout I added the layer drawable to an ImageView

<ImageView
    android:id="@+id/tintLayerTest"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:src="@drawable/test_layer"/>

MainActivity In the onCreate() method we can locate the bitmap from the layer drawable using findViewByID

public class MainActivity extends AppCompatActivity {

    ImageView iv;
    LayerDrawable ld;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //Declare ImageView containing LayerDrawable
        iv = (ImageView)findViewById(R.id.tintLayerTest);
        //Get LayerDrawable from ImageView
        ld = (LayerDrawable)iv.getDrawable();
        //Get specific Drawable/Bitmap from within LayerDrawable
        //by ID and pass it as an independent Drawable
        Drawable ldDrawable = ld.findDrawableByLayerId(R.id.tintDrawableImg);

        //Pass your new Drawable to DrawableCompat.setTint
        //and define your color int
        DrawableCompat.setTint(ldDrawable, ContextCompat.getColor(this, R.color.colorAccent));

    }
}

I hope this helps others that come across this question.