Rect frame = new Rect();
getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;  

1 int contentTop = getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();
2 //statusBarHeight是上面所求的状态栏的高度
3 int titleBarHeight = contentTop - statusBarHeight  

1 WindowManager windowManager = getWindowManager();
2 Display display = windowManager.getDefaultDisplay();
3 screenWidth = display.getWidth();
4 screenHeight = display.getHeight(); 

1 DisplayMetrics dm = new DisplayMetrics();
2 this.getWindowManager().getDefaultDisplay().getMetrics(dm);//this指当前activity
3 screenWidth =dm.widthPixels;
4 screenHeight =dm.heightPixels;  

 1 public void onCreate(Bundle savedInstanceState) {
 2          super.onCreate(savedInstanceState);
 3         //去除title
 4        requestWindowFeature(Window.FEATURE_NO_TITLE);
 5         //去掉Activity上面的状态栏
 6         getWindow().setFlags(WindowManager.LayoutParams. FLAG_FULLSCREEN ,
 7                        WindowManager.LayoutParams. FLAG_FULLSCREEN);  
 8
 9          setContentView(R.layout.main);
10 } 

 1 <application android:icon="@drawable/icon" android:label="@string/app_name">
 2          <activity android:name=".OpenGl_Lesson1"
 3                    android:theme="@android:style/Theme.NoTitleBar.Fullscreen"  
 4                    android:label="@string/app_name">
 5              <intent-filter>
 6                  <action android:name="android.intent.action.MAIN" />
 7                  <category android:name="android.intent.category.LAUNCHER" />
 8              </intent-filter>
 9          </activity>
10</application>