getSize() выдает мне ошибки

Когда я реализую

WindowManager wm = ((WindowManager)context.getSystemService(context.WINDOW_SERVICE));
Display display = wm.getDefaultDisplay();
m_nDisplayWidth = display.getWidth();
m_nDisplayHeight    = display.getHeight();

, я могу работать нормально, но когда я реализую getSize, я получаю runtimeError

Point size = new Point();
display.getSize(size); //Error right here
m_nDisplayWidth = size.x;
m_nDisplayHeight = size.y;

Logcat:

03-11 01:45:25.865: E/AndroidRuntime(18835): FATAL EXCEPTION: main 
03-11 01:45:25.865: E/AndroidRuntime(18835): android.view.InflateException: Binary XML file line #7: Error inflating class com.brain.development.GameRun
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.createView(LayoutInflater.java:518)
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570)
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:215) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.app.Activity.setContentView(Activity.java:1679) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.brain.development.BrainDevelopmentActivity$1.onClick(BrainDevelopmentActivity.java:25) 03-11 01:45:25.865: E/AndroidRuntime(18835):  at android.view.View.performClick(View.java:2582) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.View$PerformClick.run(View.java:9252) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.os.Handler.handleCallback(Handler.java:587) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.os.Handler.dispatchMessage(Handler.java:92) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.os.Looper.loop(Looper.java:130) 03-11 01:45:25.865: E/AndroidRuntime(18835):     at android.app.ActivityThread.main(ActivityThread.java:3691) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at java.lang.reflect.Method.invokeNative(Native Method) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at java.lang.reflect.Method.invoke(Method.java:507) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at dalvik.system.NativeStart.main(Native Method) 
03-11 01:45:25.865: E/AndroidRuntime(18835): Caused by: java.lang.reflect.InvocationTargetException 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at java.lang.reflect.Constructor.constructNative(Native Method) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at java.lang.reflect.Constructor.newInstance(Constructor.java:415) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at android.view.LayoutInflater.createView(LayoutInflater.java:505) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    ... 19 more 
03-11 01:45:25.865: E/AndroidRuntime(18835): Caused by: java.lang.NoSuchMethodError: android.view.Display.getSize 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.brain.development.GameRun$GameThread.<init>(GameRun.java:46) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    at com.brain.development.GameRun.<init>(GameRun.java:97) 
03-11 01:45:25.865: E/AndroidRuntime(18835):    ... 22 more