IT Village

안드로이드 학습을 하다가 다시 그만두다가를 반복했는데 필요에 의해서 다시 학습을 시작하고 있다.1차 목표는 리스트 뷰를 사용하여 아이템을 등록하고, 해당 아이템의 상태를 변경하는 간단한 앱을 만들어서 마켓에 올리는 것이다. [그림1] 아이템의 상태 변경 [그림2] 아이템의 상태 변경 개발중에 가장 문제가 되었던것중에 하나가 우선, [그림1]에서와 같이 아이템의 체크박스에 체크를 하고, 구매 상태를 변경한 후에 EditText에 포커싱이 되어서 소프트 키보드가 오픈이 되는 순간[그림1]에서 변경했던 상태가 [그림2]에서처럼 유지가 되지 않는것이었다.

This example will show how to transfer URI data from an Activity to another Activity.Please download the sample projects and import these projects into your IDE. ^^

We can populate an AdapterView such as Listview or GridView by binding the AdapterView instance to an Adapter. At this example, We will learn to implement simple list using a ListView and BaseAdapter basically. The steps to implement ListView are the following. 1. Define the XML Layout to display data in the view. 2. Define Java beans Class to save data. 3. Define the view group so that Listview..

We can remove the default title bar provided in the system. There are two ways like the following examples. The first way,==== MainActivity.java ====package com.example.samplebitmapwidget; import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.Window; public class MainActivity extends Activity { @Overrideprotected void onCreate(Bundle savedInstanceState..

It's important that we specify the appropriate input type that the user expects,such as an email address, phone number, or just plain text when they enter some text in every text field. We can specify the appropriate input type like the following.==== activity_main.xml ==== : We can specify the input type for out text field by adding the android:inputType attribute to the EditText element. Here ..

For example, we should let us close an on-screen keyboard, after we log in successfully.In that case, We can close the keybord programmatically. ==== MainActivity.java ====package com.example.samplekeypad; import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.view.inputmethod.InputMethodManag..

In this posting, we can learn how to use the Action Bar, simply. Action items appear directly in the action bar with an icon or text are known as action buttons. Actions that can't fit in the action bar or aren't important enough are hidden in the action overflow. Now, here's how to add the Action Bar. 1. Specify the Actions in XMLFirst, we should define in an XML menu resource for all action bu..

In this section, I'll start another Activity when I click the the Send button in Main Activity. Let's see the following. 1. Respond to the Send Button.==== activity_main.xml ==== : the android:onClick attribute's value, "sendMessage" is the name of a method in MainActivity that the system calls when the user click the button. 2. Build an Intent==== MainActivity.java ====public void sendMessage(V..

We can set the background color in the LinearLayout, but can't find the attribute about a border. Now Let's see the following about setting borders around the LinearLayout. The First way is to use Shape Object. ==== header_border.xml ==== : Define header_border.xml like this. Then Save it into '/res/drawable-mdpi' ==== activie_main.xml ==== : Set the reference of header_border object as a backgr..