エンドレスアダプターを採用しようとしています。アクティビティがあります - たとえば ClipsActivity は、Activity を拡張する抽象クラスを拡張します。いくつかの例では、Activity が ListActivity から拡張されていることがわかりました。それは重要ですか? ベースアダプターを拡張するリストアダプターもありますが、例では ArrayAdapter が使用されています。リストの最後に到達すると、エラーが発生します(以下のログ)
問題が何であるか、また、この Endless の実装方法に不確実性があるかどうかを指摘していただけませんか? さらに、完全な例へのリンクをいただければ幸いです。デモを見たことがありますが、私には十分に明確ではありません。ありがとう。
私の活動
public class ClipsActivity extends AbstractActivity{
@Override
public void onCreate(Bundle savedInstanceState) {
try {
super.onCreate(savedInstanceState);
setContentView(R.layout.clips);
_init();
ListView clipList = (ListView) findViewById(R.id.clipList);
EndlessClipListAdapter endlessClipsList = new EndlessClipListAdapter(getApplicationContext(), new ClipListAdapter(this, _getClips()), R.id.downloadBar);
clipList.setAdapter(endlessClipsList);
} catch (HTTPFactoryException e) {
e.printStackTrace();
}
}
私のエンドレスアダプター
public class EndlessClipListAdapter extends EndlessAdapter {
private RotateAnimation rotate=null;
public EndlessClipListAdapter(Context context, ListAdapter wrapped, int pendingResource) {
super(context, wrapped, pendingResource);
rotate=new RotateAnimation(0f, 360f, Animation.RELATIVE_TO_SELF,
0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
rotate.setDuration(600);
rotate.setRepeatMode(Animation.RESTART);
rotate.setRepeatCount(Animation.INFINITE);
}
@Override
protected boolean cacheInBackground() throws Exception {
SystemClock.sleep(10000);
return(getWrappedAdapter().getCount()<14);
}
@Override
protected void appendCachedData() {
if (getWrappedAdapter().getCount()<14) {
}
}
@Override
protected View getPendingView(ViewGroup parent) {
//View row=getLayoutInflater().inflate(R.layout.row, null);
//LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
LayoutInflater inflater = (LayoutInflater) this.getContext().getSystemService( Context.LAYOUT_INFLATER_SERVICE );
View row = inflater.inflate(R.layout.row, null);
View child=row.findViewById(android.R.id.text1);
child.setVisibility(View.GONE);
child=row.findViewById(R.id.throbber);
child.setVisibility(View.VISIBLE);
child.startAnimation(rotate);
return(row);
}
}
LogCat
04-20 13:41:43.083: W/dalvikvm(480): threadid=1: thread exiting with uncaught exception (group=0x40015560)
04-20 13:41:43.093: E/AndroidRuntime(480): FATAL EXCEPTION: main
04-20 13:41:43.093: E/AndroidRuntime(480): java.lang.IndexOutOfBoundsException: Invalid index 15, size is 15
04-20 13:41:43.093: E/AndroidRuntime(480): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:257)
04-20 13:41:43.093: E/AndroidRuntime(480): at java.util.ArrayList.get(ArrayList.java:311)
04-20 13:41:43.093: E/AndroidRuntime(480): at ru.localhost.xxxx.android.view.ClipListAdapter.getItemId(ClipListAdapter.java:47)
04-20 13:41:43.093: E/AndroidRuntime(480): at com.commonsware.cwac.adapter.AdapterWrapper.getItemId(AdapterWrapper.java:127)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.widget.AdapterView.getItemIdAtPosition(AdapterView.java:745)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.widget.AdapterView.setSelectedPositionInt(AdapterView.java:1088)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.widget.ListView.arrowScrollImpl(ListView.java:2324)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.widget.ListView.arrowScroll(ListView.java:2287)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.widget.ListView.commonKey(ListView.java:2089)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.widget.ListView.onKeyDown(ListView.java:2036)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.KeyEvent.dispatch(KeyEvent.java:1256)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.View.dispatchKeyEvent(View.java:3855)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:787)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.widget.ListView.dispatchKeyEvent(ListView.java:2021)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789)
04-20 13:41:43.093: E/AndroidRuntime(480): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1687)
04-20 13:41:43.093: E/AndroidRuntime(480): at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1120)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.app.Activity.dispatchKeyEvent(Activity.java:2073)
04-20 13:41:43.093: E/AndroidRuntime(480): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1663)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.ViewRoot.deliverKeyEventToViewHierarchy(ViewRoot.java:2560)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2535)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.view.ViewRoot.handleMessage(ViewRoot.java:1867)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.os.Handler.dispatchMessage(Handler.java:99)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.os.Looper.loop(Looper.java:123)
04-20 13:41:43.093: E/AndroidRuntime(480): at android.app.ActivityThread.main(ActivityThread.java:3683)
04-20 13:41:43.093: E/AndroidRuntime(480): at java.lang.reflect.Method.invokeNative(Native Method)
04-20 13:41:43.093: E/AndroidRuntime(480): at java.lang.reflect.Method.invoke(Method.java:507)
04-20 13:41:43.093: E/AndroidRuntime(480): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
04-20 13:41:43.093: E/AndroidRuntime(480): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
04-20 13:41:43.093: E/AndroidRuntime(480): at dalvik.system.NativeStart.main(Native Method)