Android のチャットUIライブラリを作ってみた ref: http://qiita.com/bassaer/items/f92d671ca036d526d2b1

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

    <jp.bassaer.chatmessageview.MessageView
        android:id="@+id/message_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>

file1.java

messageView.init(messages);

MainActivity.java

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Bitmap icon1 = BitmapFactory.decodeResource(getResources(), jp.bassaer.chatmessageview.R.drawable.face_1);

        Message message1 = new Message();
        message1.setUserIcon(icon1);
        message1.setUserName("Michael");
        message1.setMessageText("hey! how are you?");
        message1.setRightMessage(true);

        ArrayList<Message> messages = new ArrayList<>();

        messages.add(message1);

        MessageView messageView  = (MessageView) findViewById(R.id.message_view);

        messageView.init(messages);
    }
}