Multiple implementations of android without the title bar in full screen

1. Realize that all activity in the application are full-screen
Add directly to manifest

 
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" 

2. Realize a single activity full screen

 
requestWindowFeature(Window.FEATURE_NO_TITLE); 
getWindow().setFlags(WindowManager.LayoutParams.TYPE_STATUS_BAR, WindowManager.LayoutParams.TYPE_STATUS_BAR); 

3. Implement a single activity without the title column

 
requestWindowFeature(Window.FEATURE_NO_TITLE); 

1. Change the title: public void setTitle (CharSequence title)
2. Hide the title: requestWindowFeature(Window.FEATURE_NO_TITLE);
3. Hide the title and the top battery and signal bar (full screen) :

 
public void setFullscreen() { 
requestWindowFeature(Window.FEATURE_NO_TITLE); 
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
WindowManager.LayoutParams.FLAG_FULLSCREEN); 
} 

4. Customize the title content

 
<activity android:name=".activity.MainActivity" android:screenOrientation="portrait" android:label="@string/titlebar_text" 
</actibity> 2 )  

In the MainActivity file:

 
requestWindowFeature(Window.FEATURE_NO_TITLE); 
// Set the window to have no title bar  
setContentView(R.layout.main); 
// Set the value of the title dynamically, getTitle() Is the value of it activity In the statement. android:label The value of the  
((TextView) findViewById(R.id.titlebar_text)).setText(getTitle()); 

Where, the value obtained by getTitle() is the value above android:label=" @string /titlebar_text"
5. Customize the title layout

 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
// Pre-set the window state to allow changes in  setContentView  Called before, otherwise set the title when throwing runtime error.  
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); 
setContentView(R.layout.custom_title); 
// The header area can be set to  layout  , so that there can be a rich way of presentation  
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, 
R.layout.custom_title_1); 
} 

res\layout\ custom_title_1.xml contains 1 TextView to display the title. Android can be shown as a title of 1 layout, which is very extensible.

 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/screen" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:orientation="vertical"> 
<TextView android:id="@+id/left_text" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_alignParentLeft="true" 
android:text="@string/custom_title_left" /> 
</RelativeLayout>