Fixed crash due to Picasso being handed empty strings for missing avatars and header images.

app/src/main/java/com/keylesspalace/tusky/Account.java

@@ -50,13 +50,13 @@ class Account {
         if (!avatarUrl.equals("/avatars/original/missing.png")) {
             account.avatar = avatarUrl;
         } else {
-            account.avatar = "";
+            account.avatar = null;
         }
         String headerUrl = object.getString("header");
         if (!headerUrl.equals("/headers/original/missing.png")) {
             account.header = headerUrl;
         } else {
-            account.header = "";
+            account.header = null;
         }
         account.followersCount = object.getString("followers_count");
         account.followingCount = object.getString("following_count");

app/src/main/java/com/keylesspalace/tusky/AccountActivity.java

@@ -219,19 +219,15 @@ public class AccountActivity extends BaseActivity {
         note.setLinksClickable(true);
         note.setMovementMethod(LinkMovementMethod.getInstance());
 
-        if (!account.avatar.isEmpty()) {
-            Picasso.with(this)
-                    .load(account.avatar)
-                    .placeholder(R.drawable.avatar_default)
-                    .error(R.drawable.avatar_error)
-                    .into(avatar);
-        }
-        if (!account.header.isEmpty()) {
-            Picasso.with(this)
-                    .load(account.header)
-                    .placeholder(R.drawable.account_header_missing)
-                    .into(header);
-        }
+        Picasso.with(this)
+                .load(account.avatar)
+                .placeholder(R.drawable.avatar_default)
+                .error(R.drawable.avatar_error)
+                .into(avatar);
+        Picasso.with(this)
+                .load(account.header)
+                .placeholder(R.drawable.account_header_missing)
+                .into(header);
 
         openInWebUrl = account.url;
         java.text.NumberFormat nf = java.text.NumberFormat.getInstance();

app/src/main/java/com/keylesspalace/tusky/BlocksAdapter.java

@@ -20,9 +20,10 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
+import android.widget.ImageView;
 import android.widget.TextView;
 
-import com.android.volley.toolbox.NetworkImageView;
+import com.squareup.picasso.Picasso;
 
 import java.util.HashSet;
 import java.util.Set;
@@ -88,7 +89,7 @@ class BlocksAdapter extends AccountAdapter {
     }
 
     private static class BlockedUserViewHolder extends RecyclerView.ViewHolder {
-        private NetworkImageView avatar;
+        private ImageView avatar;
         private TextView username;
         private TextView displayName;
         private Button unblock;
@@ -96,7 +97,7 @@ class BlocksAdapter extends AccountAdapter {
 
         BlockedUserViewHolder(View itemView) {
             super(itemView);
-            avatar = (NetworkImageView) itemView.findViewById(R.id.blocked_user_avatar);
+            avatar = (ImageView) itemView.findViewById(R.id.blocked_user_avatar);
             displayName = (TextView) itemView.findViewById(R.id.blocked_user_display_name);
             username = (TextView) itemView.findViewById(R.id.blocked_user_username);
             unblock = (Button) itemView.findViewById(R.id.blocked_user_unblock);
@@ -108,8 +109,11 @@ class BlocksAdapter extends AccountAdapter {
             String format = username.getContext().getString(R.string.status_username_format);
             String formattedUsername = String.format(format, account.username);
             username.setText(formattedUsername);
-            avatar.setImageUrl(account.avatar,
-                    VolleySingleton.getInstance(avatar.getContext()).getImageLoader());
+            Picasso.with(avatar.getContext())
+                    .load(account.avatar)
+                    .error(R.drawable.avatar_error)
+                    .placeholder(R.drawable.avatar_default)
+                    .into(avatar);
         }
 
         void setupActionListener(final AccountActionListener listener, final boolean blocked,

app/src/main/java/com/keylesspalace/tusky/FollowAdapter.java

@@ -23,8 +23,6 @@ import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.TextView;
 
-import com.android.volley.toolbox.ImageLoader;
-import com.android.volley.toolbox.NetworkImageView;
 import com.squareup.picasso.Picasso;
 
 /** Both for follows and following lists. */

app/src/main/java/com/keylesspalace/tusky/ViewThreadActivity.java

@@ -15,7 +15,6 @@
 
 package com.keylesspalace.tusky;
 
-import android.content.Intent;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;

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

@@ -3,7 +3,7 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
-    <com.android.volley.toolbox.NetworkImageView
+    <ImageView
         android:layout_width="64dp"
         android:layout_height="64dp"
         android:scaleType="fitCenter"