मैं इस प्रकार एक ContentObserver का उपयोग कर एक ListActivity पर सामग्री अद्यतन देख रहा हूँ के लिए AbsListView.obtainView पर ListView में:क्रैश ListActivity
protected void onCreate(Bundle savedState)
{
super.onCreate(savedState);
ContentResolver cr = getContentResolver();
Cursor cursor = cr.query(TrackHeader.CONTENT_URI, sTrackListProjection, null, null, null);
startManagingCursor(cursor);
this.mAdapter = new TrackHeaderDataAdapter(this, R.layout.track_list_item, cursor, sTrackListProjection, null);
setListAdapter(mAdapter);
Handler handler = new Handler();
mTrackHeaderObserver = new ContentObserver(handler) {
@Override
public boolean deliverSelfNotifications() {
return false;
}
@Override
public void onChange(boolean selfChange) {
super.onChange(selfChange);
ContentResolver cr = getContentResolver();
mAdapter.changeCursor(cr.query(TrackHeader.CONTENT_URI, sTrackListProjection, null, null, null));
}
};
getContentResolver().registerContentObserver (TrackHeader.CONTENT_URI, true, mTrackHeaderObserver);
}
यह सामग्री पर्यवेक्षक ठीक होने लगता है - यह यूआई पर वापस बुलाया जाता है धागा, लेकिन मैं अंतर्निहित ListView पर सुंदर जाहिर निम्नलिखित यादृच्छिक दुर्घटना हो रही है:
02-21 14:06:00.440: ERROR/AndroidRuntime(739): java.lang.NullPointerException
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.AbsListView.obtainView(AbsListView.java:1276)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.ListView.makeAndAddView(ListView.java:1668)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.ListView.fillDown(ListView.java:637)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.ListView.fillSpecific(ListView.java:1224)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.ListView.layoutChildren(ListView.java:1499)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.AbsListView.onLayout(AbsListView.java:1113)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.View.layout(View.java:6830)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.View.layout(View.java:6830)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.View.layout(View.java:6830)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.View.layout(View.java:6830)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:998)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.LinearLayout.onLayout(LinearLayout.java:918)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.View.layout(View.java:6830)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.View.layout(View.java:6830)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.View.layout(View.java:6830)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.View.layout(View.java:6830)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.ViewRoot.performTraversals(ViewRoot.java:996)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.view.ViewRoot.handleMessage(ViewRoot.java:1633)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.os.Handler.dispatchMessage(Handler.java:99)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.os.Looper.loop(Looper.java:123)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at android.app.ActivityThread.main(ActivityThread.java:4363)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at java.lang.reflect.Method.invokeNative(Native Method)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at java.lang.reflect.Method.invoke(Method.java:521)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
02-21 14:06:00.440: ERROR/AndroidRuntime(739): at dalvik.system.NativeStart.main(Native Method)
02-21 14:09:56.159: ERROR/AndroidRuntime(749): ERROR: thread attach failed
02-21 14:09:59.480: ERROR/AndroidRuntime(760): ERROR: thread attach failed
02-21 14:12:19.449: ERROR/AndroidRuntime(778): ERROR: thread attach failed
02-21 14:12:22.779: ERROR/AndroidRuntime(789): ERROR: thread attach failed
02-21 14:12:26.479: ERROR/gralloc(51): [unregister] handle 0x3f13b8 still locked (state=40000001)
किसी को भी इस तरह कुछ भी देखा से पहले - कुछ दिनों के लिए इस पर स्टम्प्ड दिया ...
टिम
अरे टिम क्या आपने कभी यह हल किया है? मैं अपने लॉग – Bostone
में एक ही संदेश देख रहा हूं यदि आप गेटव्यू विधि का उपयोग कर रहे हैं तो बहुत सावधान रहें, क्योंकि कर्सोरैप्टर के पास गेटव्यू नामक एक विधि भी है .. मैंने अपने हाथों को यहां कुछ घंटों तक जला दिया .. – SaKet
@ सैकेट आपका समाधान बीटीडब्ल्यू क्या है? – alicanbatur