Add "Picasso" library; show header images in wikivoyage search list

OsmAnd/build.gradle

@@ -414,6 +414,8 @@ dependencies {
     compile 'com.moparisthebest:junidecode:0.1.1'
     compile 'org.immutables:gson:2.5.0'
     compile 'com.vividsolutions:jts-core:1.14.0'
+
+	compile 'com.squareup.picasso:picasso:2.71828'
 // size restrictions
 // compile 'com.ibm.icu:icu4j:50.1' 
 // compile 'net.sf.trove4j:trove4j:3.0.3'

OsmAnd/res/drawable/wikivoyage_search_placeholder.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
+	>
+	<item>
+		<shape android:shape="oval">
+			<solid android:color="@color/color_transparent"/>
+			<size
+				android:width="28dp"
+				android:height="28dp"/>
+		</shape>
+	</item>
+	<item
+		android:id="@+id/placeholder_icon"
+		android:bottom="2dp"
+		android:left="2dp"
+		android:right="2dp"
+		android:top="2dp">
+
+		<bitmap
+			android:gravity="center"
+			android:src="@drawable/ic_action_placeholder_city"
+			android:tint="@color/icon_color"/>
+	</item>
+</layer-list>

OsmAnd/res/layout/wikivoyage_search_list_item.xml

@@ -22,8 +22,8 @@
 
 			<ImageView
 				android:id="@+id/icon"
-				android:layout_width="wrap_content"
-				android:layout_height="wrap_content"
+				android:layout_width="28dp"
+				android:layout_height="28dp"
 				android:layout_gravity="center_vertical"
 				android:layout_marginEnd="@dimen/content_padding"
 				android:layout_marginRight="@dimen/content_padding"

OsmAnd/src/net/osmand/plus/widgets/tools/CropCircleTransformation.java

@@ -0,0 +1,49 @@
+package net.osmand.plus.widgets.tools;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapShader;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+
+import com.squareup.picasso.Transformation;
+
+public class CropCircleTransformation implements Transformation {
+
+	private static final String KEY = "CropCircleTransformation";
+
+	@Override
+	public Bitmap transform(Bitmap source) {
+		int size = Math.min(source.getWidth(), source.getHeight());
+
+		int width = (source.getWidth() - size) / 2;
+		int height = (source.getHeight() - size) / 2;
+
+		Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
+
+		Canvas canvas = new Canvas(bitmap);
+		Paint paint = new Paint();
+		BitmapShader shader =
+				new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
+		if (width != 0 || height != 0) {
+			// source isn't square, move viewport to center
+			Matrix matrix = new Matrix();
+			matrix.setTranslate(-width, -height);
+			shader.setLocalMatrix(matrix);
+		}
+		paint.setShader(shader);
+		paint.setAntiAlias(true);
+
+		float r = size / 2f;
+		canvas.drawCircle(r, r, r, paint);
+
+		source.recycle();
+
+		return bitmap;
+	}
+
+	@Override
+	public String key() {
+		return KEY;
+	}
+}

OsmAnd/src/net/osmand/plus/wikivoyage/search/SearchRecyclerViewAdapter.java

@@ -1,7 +1,10 @@
 package net.osmand.plus.wikivoyage.search;
 
+import android.graphics.drawable.LayerDrawable;
+import android.os.Build;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -9,9 +12,12 @@ import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.TextView;
 
-import net.osmand.plus.IconsCache;
+import com.squareup.picasso.Picasso;
+
 import net.osmand.plus.OsmandApplication;
 import net.osmand.plus.R;
+import net.osmand.plus.widgets.tools.CropCircleTransformation;
+import net.osmand.plus.wikivoyage.data.WikivoyageArticle;
 import net.osmand.plus.wikivoyage.data.WikivoyageSearchResult;
 
 import java.util.ArrayList;
@@ -23,7 +29,7 @@ public class SearchRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView
 	private static final int ITEM_TYPE = 1;
 
 	private OsmandApplication app;
-	private IconsCache iconsCache;
+	private LayerDrawable placeholder;
 
 	private List<Object> items = new ArrayList<>();
 
@@ -35,7 +41,11 @@ public class SearchRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView
 
 	SearchRecyclerViewAdapter(OsmandApplication app) {
 		this.app = app;
-		this.iconsCache = app.getIconsCache();
+		placeholder = (LayerDrawable) ContextCompat.getDrawable(app, R.drawable.wikivoyage_search_placeholder);
+		if (Build.VERSION.SDK_INT < 21 && placeholder != null) {
+			placeholder.setDrawableByLayerId(R.id.placeholder_icon,
+					app.getIconsCache().getIcon(R.drawable.ic_action_placeholder_city, R.color.icon_color));
+		}
 	}
 
 	@NonNull
@@ -60,9 +70,11 @@ public class SearchRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView
 			boolean lastItem = pos == getItemCount() - 1;
 
 			WikivoyageSearchResult item = (WikivoyageSearchResult) getItem(pos);
-			holder.icon.setImageDrawable(
-					iconsCache.getIcon(R.drawable.ic_action_placeholder_city, R.color.icon_color)
-			);
+			Picasso.get()
+					.load(WikivoyageArticle.getThumbImageUrl(item.getImageTitle()))
+					.transform(new CropCircleTransformation())
+					.placeholder(placeholder)
+					.into(holder.icon);
 			holder.title.setText(item.getArticleTitles().get(0));
 			holder.leftDescr.setText(item.getIsPartOf());
 			holder.rightDescr.setText(item.getFirstLangsString());
@@ -102,7 +114,7 @@ public class SearchRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView
 
 		final TextView title;
 
-		public HeaderVH(View itemView) {
+		HeaderVH(View itemView) {
 			super(itemView);
 			title = (TextView) itemView.findViewById(R.id.title);
 		}
@@ -117,7 +129,7 @@ public class SearchRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView
 		final View divider;
 		final View shadow;
 
-		public ItemVH(View itemView) {
+		ItemVH(View itemView) {
 			super(itemView);
 			icon = (ImageView) itemView.findViewById(R.id.icon);
 			title = (TextView) itemView.findViewById(R.id.title);