Identicon generation code from Android-Identicons

Source: https://github.com/saiimons/Android-Identicons
License: Apache License, Version 2.0

briar-android/src/im/delight/android/identicons/SymmetricIdenticon.java

@@ -0,0 +1,81 @@
+package im.delight.android.identicons;
+
+/**
+ * Copyright 2014 www.delight.im <info@delight.im>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.content.Context;
+import android.graphics.Color;
+import android.util.AttributeSet;
+
+public class SymmetricIdenticon extends IdenticonView {
+
+    private static final int CENTER_COLUMN_INDEX = 3;
+
+    private IdenticonBase mDelegate;
+
+    public SymmetricIdenticon(Context context) {
+        super(context);
+        initDelegate();
+    }
+
+    public SymmetricIdenticon(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        initDelegate();
+    }
+
+    public SymmetricIdenticon(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        initDelegate();
+    }
+
+    private void initDelegate() {
+        mDelegate = new IdenticonBase() {
+            @Override
+            protected int getRowCount() {
+                return 5;
+            }
+
+            @Override
+            protected int getColumnCount() {
+                return 5;
+            }
+
+            @Override
+            protected boolean isCellVisible(int row, int column) {
+                return getByte(3 + row * CENTER_COLUMN_INDEX + getSymmetricColumnIndex(column)) >= 0;
+            }
+
+            @Override
+            protected int getIconColor() {
+                return Color.rgb(getByte(0) + 128, getByte(1) + 128, getByte(2) + 128);
+            }
+        };
+    }
+
+    @Override
+    protected IdenticonBase getDelegate() {
+        return mDelegate;
+    }
+
+    protected int getSymmetricColumnIndex(int row) {
+        if (row < CENTER_COLUMN_INDEX) {
+            return row;
+        } else {
+            return getDelegate().getColumnCount() - row - 1;
+        }
+    }
+
+}