android 画布锁,关于界面画布锁定了的问题

11-10 17:45:32.470: ERROR/SurfaceFlinger(202): Layer::requestBuffer(this=0x34de88), index=1, w=320, h=480 failed (Out of memory)

11-10 17:45:32.470:

ERROR/Surface(1202): Surface (identity=273) requestBuffer(1, 00000033) returneda buffer with a null handle

11-10 17:45:32.470:

ERROR/Surface(1202): getBufferLocked(1, 00000033) failed (Out of memory)

11-10 17:45:32.470:

ERROR/Surface(1202): dequeueBuffer failed (Out of memory)

11-10 17:45:32.490:

ERROR/ViewRoot(1202): OutOfResourcesException locking surface

11-10 17:45:32.490:

ERROR/ViewRoot(1202): android.view.Surface$OutOfResourcesException

11-10 17:45:32.490:

ERROR/ViewRoot(1202):     at android.view.Surface.lockCanvasNative(Native Method)

11-10 17:45:32.490:

ERROR/ViewRoot(1202):     at android.view.Surface.lockCanvas(Surface.java:314)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at android.view.ViewRoot.draw(ViewRoot.java:1341)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at android.view.ViewRoot.performTraversals(ViewRoot.java:1163)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at android.os.Handler.dispatchMessage(Handler.java:99)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at android.os.Looper.loop(Looper.java:123)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at android.app.ActivityThread.main(ActivityThread.java:4627)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at java.lang.reflect.Method.invokeNative(Native Method)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at java.lang.reflect.Method.invoke(Method.java:521)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)

11-10 17:45:32.490: ERROR/ViewRoot(1202):

at dalvik.system.NativeStart.main(Native Method)

界面画不出来【报错如上】，即使画出来了也滚动不了！求高人...不吝赐教。