Update splash logo to purple

mastodon/src/main/java/org/joinmastodon/android/ui/views/SplashLogoView.java

@@ -0,0 +1,70 @@
+package org.joinmastodon.android.ui.views;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.drawable.Drawable;
+import android.util.AttributeSet;
+import android.widget.ImageView;
+
+import androidx.annotation.Nullable;
+import me.grishka.appkit.utils.V;
+
+public class SplashLogoView extends ImageView{
+	private Bitmap shadow;
+	private Paint paint=new Paint();
+
+	public SplashLogoView(Context context){
+		this(context, null);
+	}
+
+	public SplashLogoView(Context context, AttributeSet attrs){
+		this(context, attrs, 0);
+	}
+
+	public SplashLogoView(Context context, AttributeSet attrs, int defStyle){
+		super(context, attrs, defStyle);
+
+	}
+
+	@Override
+	protected void onDraw(Canvas canvas){
+		if(shadow!=null){
+			paint.setColor(0xBF000000);
+			canvas.drawBitmap(shadow, 0, 0, paint);
+		}
+		super.onDraw(canvas);
+	}
+
+	@Override
+	protected void onSizeChanged(int w, int h, int oldw, int oldh){
+		super.onSizeChanged(w, h, oldw, oldh);
+		if(w!=oldw || h!=oldh)
+			updateShadow();
+	}
+
+	@Override
+	public void setImageDrawable(@Nullable Drawable drawable){
+		super.setImageDrawable(drawable);
+		updateShadow();
+	}
+
+	private void updateShadow(){
+		int w=getWidth();
+		int h=getHeight();
+		Drawable drawable=getDrawable();
+		if(w==0 || h==0 || drawable==null)
+			return;
+		drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
+		Bitmap temp=Bitmap.createBitmap(w, h, Bitmap.Config.ALPHA_8);
+		shadow=Bitmap.createBitmap(w, h, Bitmap.Config.ALPHA_8);
+		Canvas c=new Canvas(temp);
+		c.translate(getWidth()/2f-drawable.getIntrinsicWidth()/2f, getHeight()/2f-drawable.getIntrinsicHeight()/2f);
+		drawable.draw(c);
+		c=new Canvas(shadow);
+		Paint paint=new Paint();
+		paint.setShadowLayer(V.dp(2), 0, 0, 0xff000000);
+		c.drawBitmap(temp, 0, 0, paint);
+	}
+}