Tag: java

1. Unzip the Gradle download to the folder to which you would like to install Gradle, eg. “C:\Program Files”. The subdirectory gradle-x.x will be created from the archive, where x.x is the version.
2. Add location of your Gradle “bin” folder to your path. Open the system properties (WinKey + Pause), select the “Advanced” tab, and the “Environment Variables” button, then add “C:\Program Files\gradle-x.x\bin” (or wherever you unzipped Gradle) to the end of your “Path” variable under System Properties. Be sure to omit any quotation marks around the path even if it contains spaces. Also make sure you separated from previous PATH entries with a semicolon “;”.
3. In the same dialog, make sure that JAVA_HOME exists in your user variables or in the system variables and it is set to the location of your JDK, e.g. C:\Program Files\Java\jdk1.7.0_06 and that %JAVA_HOME%\bin is in your Path environment variable.
4. Open a new command prompt (type cmd in Start menu) and run gradle –version to verify that it is correctly installed.

References
http://bryanlor.com/blog/gradle-tutorial-how-install-gradle-windows
https://www.javacodegeeks.com/2013/04/how-to-install-gradle-2.html

Resources :

http://www.mkyong.com/android/android-progress-bar-example/

getActivity().getFragmentManager().popBackStack();

References :
http://stackoverflow.com/questions/20812922/how-to-close-the-current-fragment-by-using-button-like-the-back-button

Defining a Menu in XML

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/new_game"
          android:icon="@drawable/ic_new_game"
          android:title="@string/new_game"
          android:showAsAction="ifRoom"/>
    <item android:id="@+id/help"
          android:icon="@drawable/ic_help"
          android:title="@string/help" />
</menu>

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/file"
          android:title="@string/file" >
        <!-- "file" submenu -->
        <menu>
            <item android:id="@+id/create_new"
                  android:title="@string/create_new" />
            <item android:id="@+id/open"
                  android:title="@string/open" />
        </menu>
    </item>
</menu>

Creating an Options Menu

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.game_menu, menu);
    return true;
}

Handling click events

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle item selection
    switch (item.getItemId()) {
        case R.id.new_game:
            newGame();
            return true;
        case R.id.help:
            showHelp();
            return true;
        default:
            return super.onOptionsItemSelected(item);
    }
}

Changing menu items at runtime

If you want to modify the options menu based on events that occur during the activity lifecycle, you can do so in the onPrepareOptionsMenu() method.

References :
https://developer.android.com/guide/topics/ui/menus.html#options-menu
https://developer.android.com/guide/topics/resources/menu-resource.html
http://stackoverflow.com/questions/15492791/how-do-i-show-overflow-menu-items-to-action-bar-in-android
http://www.techotopia.com/index.php/Creating_and_Managing_Overflow_Menus_on_Android

This is very simple to accomplish

If you want to change it in code, call:

setTitle("My new title");
getActionBar().setIcon(R.drawable.my_icon);

And set the values to whatever you please.

Or, in the Android manifest XML file:

<activity android:name=".MyActivity" 
       android:icon="@drawable/my_icon" 
       android:label="My new title" />

To enable the back button in your app use:

 getActionBar().setHomeButtonEnabled(true);
 getActionBar().setDisplayHomeAsUpEnabled(true);

The code should all be placed in your onCreate so that the label/icon changing is transparent to the user, but in reality it can be called anywhere during the activity’s lifecycle.

References :
http://stackoverflow.com/questions/14483393/how-do-i-change-the-android-actionbar-title-and-icon

custom_actionbar.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:background="@drawable/black_pattern" >

    <TextView
        android:id="@+id/title_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:textAllCaps="true"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="#fff"
        android:textStyle="bold" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="35dp"
        android:layout_height="35dp"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:layout_marginLeft="8dp"
        android:src="@drawable/ic_launcher" />

    <ImageButton
        android:id="@+id/imageButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:layout_marginRight="8dp"
        android:background="@null"
        android:src="@android:drawable/ic_menu_rotate" />

</RelativeLayout>

Activity Class (MainActivity.java)

public class MainActivity extends Activity {

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

		ActionBar mActionBar = getActionBar();
		mActionBar.setDisplayShowHomeEnabled(false);
		mActionBar.setDisplayShowTitleEnabled(false);
		LayoutInflater mInflater = LayoutInflater.from(this);

		View mCustomView = mInflater.inflate(R.layout.custom_actionbar, null);
		TextView mTitleTextView = (TextView) mCustomView.findViewById(R.id.title_text);
		mTitleTextView.setText("My Own Title");

		ImageButton imageButton = (ImageButton) mCustomView
				.findViewById(R.id.imageButton);
		imageButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View view) {
				Toast.makeText(getApplicationContext(), "Refresh Clicked!",
						Toast.LENGTH_LONG).show();
			}
		});

		mActionBar.setCustomView(mCustomView);
		mActionBar.setDisplayShowCustomEnabled(true);
	}

}

References :
http://stacktips.com/tutorials/android/actionbar-with-custom-view-example-in-android