Use jitpack libraries

app/src/main/java/com/hippo/widget/ObservedTextView.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * 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.
+ */
+
+package com.hippo.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.widget.TextView;
+
+public class ObservedTextView extends TextView {
+
+    private OnWindowAttachListener mOnWindowAttachListener;
+
+    public ObservedTextView(Context context) {
+        super(context);
+    }
+
+    public ObservedTextView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ObservedTextView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+
+        if (mOnWindowAttachListener != null) {
+            mOnWindowAttachListener.onAttachedToWindow();
+        }
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+
+        if (mOnWindowAttachListener != null) {
+            mOnWindowAttachListener.onDetachedFromWindow();
+        }
+    }
+
+    public void setOnWindowAttachListener(OnWindowAttachListener onWindowAttachListener) {
+        mOnWindowAttachListener = onWindowAttachListener;
+    }
+
+    public interface OnWindowAttachListener {
+        void onAttachedToWindow();
+        void onDetachedFromWindow();
+    }
+}