尝试实现加载程序管理器以便与我的内容提供程序和数据库一起使用时，我遇到了一些错误。
我将从logcat输出开始：
1-19 16:37:33.628: I/(20193): Loaded EGL implementation /system/lib//egl/libEGL_tegra_impl
01-19 16:37:33.648: I/(20193): Loading GLESv2 implementation /system/lib//egl/libGLESv2_tegra_impl
01-19 16:37:33.883: E/CursorWindow(20193): Failed to read row 0, column -1 from a CursorWindow which has 11 rows, 1 columns.
01-19 16:37:33.883: W/dalvikvm(20193): threadid=1: thread exiting with uncaught exception (group=0x40cfc2d0)
01-19 16:37:33.893: E/AndroidRuntime(20193): FATAL EXCEPTION: main
01-19 16:37:33.893: E/AndroidRuntime(20193): java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.database.CursorWindow.nativeGetString(Native Method)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.database.CursorWindow.getString(CursorWindow.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at adapters.FastScrollAdapter.getView(FastScrollAdapter.java:99)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.AbsListView.obtainView(AbsListView.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.ListView.makeAndAddView(ListView.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.ListView.fillDown(ListView.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.ListView.fillFromTop(ListView.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.ListView.layoutChildren(ListView.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.AbsListView.onLayout(AbsListView.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.View.layout(View.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewGroup.layout(ViewGroup.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.setChildFrame(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.layoutVertical(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.onLayout(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.View.layout(View.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewGroup.layout(ViewGroup.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.setChildFrame(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.layoutVertical(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.onLayout(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.View.layout(View.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewGroup.layout(ViewGroup.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.FrameLayout.onLayout(FrameLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.View.layout(View.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewGroup.layout(ViewGroup.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1520)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.View.layout(View.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewGroup.layout(ViewGroup.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.setChildFrame(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.layoutVertical(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.onLayout(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.View.layout(View.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewGroup.layout(ViewGroup.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.FrameLayout.onLayout(FrameLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.View.layout(View.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewGroup.layout(ViewGroup.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.setChildFrame(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.layoutVertical(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.LinearLayout.onLayout(LinearLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.View.layout(View.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewGroup.layout(ViewGroup.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.widget.FrameLayout.onLayout(FrameLayout.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.View.layout(View.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewGroup.layout(ViewGroup.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewRootImpl.performLayout(ViewRootImpl.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.Choreographer$CallbackRecord.run(Choreographer.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.Choreographer.doCallbacks(Choreographer.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.Choreographer.doFrame(Choreographer.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.os.Handler.handleCallback(Handler.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.os.Handler.dispatchMessage(Handler.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.os.Looper.loop(Looper.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at android.app.ActivityThread.main(ActivityThread.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at java.lang.reflect.Method.invokeNative(Native Method)
01-19 16:37:33.893: E/AndroidRuntime(20193): at java.lang.reflect.Method.invoke(Method.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
01-19 16:37:33.893: E/AndroidRuntime(20193): at dalvik.system.NativeStart.main(Native Method)
以下是应显示列表的片段：
public class ShiftsFragment extends Fragment implements
LoaderManager.LoaderCallbacks<Cursor> {
public static Typeface tf, tf2, roboto;
private FastScrollAdapter adapter;
ListView ls;
public static ShiftsFragment newInstance(String title) {
ShiftsFragment pageFragment = new ShiftsFragment();
return pageFragment;
}
@SuppressLint("NewApi")
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.shifts, container, false);
/*
* StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
* .detectAll().penaltyLog().build()); StrictMode.setVmPolicy(new
* StrictMode.VmPolicy.Builder()
* .detectLeakedSqlLiteObjects().detectLeakedClosableObjects()
* .penaltyLog().penaltyDeath().build());
*/
roboto = Typeface.createFromAsset(getActivity().getAssets(),
"fonts/JuraLight.ttf");
tf = Typeface.createFromAsset(getActivity().getAssets(),
"fonts/Advert.ttf");
tf2 = Typeface.createFromAsset(getActivity().getAssets(),
"fonts/passion.ttf");
TextView SF = (TextView) view.findViewById(R.id.total);
SF.setTypeface(tf);
ls = (ListView)view.findViewById(android.R.id.list);
getLoaderManager().initLoader(0, null, this);
return view;
}
public Loader<Cursor> onCreateLoader(int loaderId, Bundle args) {
// Query the db asyncronously
String[] projection = { DBAdapter.KEY_ROWID,
DBAdapter.KEY_TIMESTAMP_IN, DBAdapter.KEY_TIMESTAMP_OUT };
String where = null;
String[] whereArgs = null;
String sortOrder = null;
CursorLoader cursorLoader = new CursorLoader(getActivity(),
provider.CONTENT_URI, projection, null, null, null);
return cursorLoader;
}
@SuppressLint("NewApi")
@Override
public void onLoadFinished(Loader<Cursor> arg0, Cursor arg1) {
// Update adapter and views // must use a handler to sync UI thread
// stuff
adapter = new FastScrollAdapter(getActivity(), arg1);
ls.setAdapter(adapter);
}
@Override
public void onLoaderReset(Loader<Cursor> arg0) {
// release references
}
}
这是我的内容提供商类：
public class provider extends ContentProvider {
private DBAdapter dbAdapter;
private static final String AUTHORITY = "provider";
private static final String BASE_PATH = "todos";
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY
+ "/" + BASE_PATH);
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
// TODO Auto-generated method stub
return 0;
}
@Override
public String getType(Uri uri) {
// TODO Auto-generated method stub
return null;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean onCreate() {
dbAdapter = new DBAdapter(getContext());
return false;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
DBAdapter dba = new DBAdapter(getContext());
dba.open();
SQLiteDatabase db = DBAdapter.db;
queryBuilder.setTables(DBAdapter.DATABASE_TABLE);
Cursor cursor = queryBuilder.query(db, projection, selection,
selectionArgs, null, null, sortOrder);
cursor.setNotificationUri(getContext().getContentResolver(), uri);
// TODO Auto-generated method stub
return cursor;
}
@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
// TODO Auto-generated method stub
return 0;
}
}
，这是我自己的自定义适配器：
// This is a custom adapter that will use cursor to get data from SQLite DB as the source.
public class FastScrollAdapter extends CursorAdapter {
private LayoutInflater mInflater;
public static Cursor cursor;
public static int c = 0;
public static ViewHolder holder;
public DBAdapter dba;
Context context;
public FastScrollAdapter(Context context, Cursor c) {
super(context, c);
this.mInflater = LayoutInflater.from(context);
this.cursor = c;
this.context = context;
}
public FastScrollAdapter(Context context, Cursor c, boolean autoRequery) {
super(context, c, autoRequery);
this.mInflater = LayoutInflater.from(context);
this.cursor = c;
}
// Here we shall look to see if the View already exists and create a new one
// if not.
@Override
public View getView(int position, View convertView, ViewGroup parent) {
dba = new DBAdapter(context);
this.cursor = dba.getAllShifts();
int listLength = cursor.getCount();
// If view doesn't exists = create a new one and also store it (all of
// the views) in our ViewHolder class called "holder"
if (convertView == null) {
convertView = this.mInflater.inflate(R.layout.list_entry2, null);
holder = new ViewHolder();
holder.TL = (TableLayout) convertView.findViewById(R.id.TableBG);
holder.info = (TextView) convertView.findViewById(R.id.Info);
holder.info.setTypeface(SettingsFragment.roboto);
holder.info.setText("Info");
holder.dateDisp = (TextView) convertView
.findViewById(R.id.dateDisp);
holder.timeInShift = (TextView) convertView
.findViewById(R.id.timeInShift);
holder.day = (TextView) convertView.findViewById(R.id.day);
holder.Money = (TextView) convertView.findViewById(R.id.Money);
holder.shiftDisp = (TextView) convertView
.findViewById(R.id.shiftDisp);
holder.start_finish = (TextView) convertView
.findViewById(R.id.start_finish);
holder.Duration = (TextView) convertView
.findViewById(R.id.Duration);
holder.insert = (TextView) convertView.findViewById(R.id.insert);
holder.insert.setTypeface(ShiftsFragment.roboto);
convertView.setTag(holder);
// If exists, just fetch this view and display it.
} else {
holder = (ViewHolder) convertView.getTag();
}
this.cursor.moveToPosition(position);
// Set some values...
/*************** Taken From DB ******************/
holder.start_finish.setText(this.cursor.getString(this.cursor
.getColumnIndex(DBAdapter.KEY_START_TEXT_VIEW))
+ this.cursor.getString(this.cursor
.getColumnIndex(DBAdapter.KEY_END_TEXT_VIEW)));
holder.start_finish.setTypeface(ShiftsFragment.roboto);
holder.shiftDisp.setText(this.cursor.getString(this.cursor
.getColumnIndex(DBAdapter.KEY_MONEY)));
holder.shiftDisp.setTypeface(ShiftsFragment.roboto);
//
holder.dateDisp.setText(this.cursor.getString(this.cursor
.getColumnIndex(DBAdapter.KEY_DATE)));
holder.dateDisp.setTypeface(ShiftsFragment.roboto);
holder.day.setText(this.cursor.getString(this.cursor
.getColumnIndex(DBAdapter.KEY_DAY)));
holder.day.setTypeface(ShiftsFragment.roboto);
holder.timeInShift.setText(this.cursor.getString(this.cursor
.getColumnIndex(DBAdapter.KEY_TOTAL_TIME_OF_SHIFT_STRING)));
holder.timeInShift.setTypeface(ShiftsFragment.roboto);
holder.insert.setText(this.cursor.getString(this.cursor
.getColumnIndex(DBAdapter.KEY_INSERT_MODE)));
//
/*************** Regular ones ******************/
holder.info.setTypeface(ShiftsFragment.roboto);
holder.info.setText("Date:");
holder.Money.setTypeface(ShiftsFragment.roboto);
holder.Money.setText("Money Made:");
holder.Duration.setTypeface(ShiftsFragment.roboto);
holder.Duration.setText("Duration:");
return convertView;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return null;
}
static class ViewHolder {
TextView info;
TextView dateDisp;
TextView day;
TextView Duration;
TextView start_finish;
TextView Money;
TextView shiftDisp;
TextView timeInShift;
TextView insert;
TableLayout TL;
}
public static void animate(final View v) {
final Animation out = new AlphaAnimation(1, 0);
out.setInterpolator(new DecelerateInterpolator());
out.setDuration(350);
v.setAnimation(out);
out.start();
out.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
Log.i("Animation", "Started");
}
@Override
public void onAnimationRepeat(Animation animation) {
// Shifts.setSummaryCursor.requery();
}
@Override
public void onAnimationEnd(Animation animation) {
// Shifts.setSummaryCursor.requery();
}
});
}
}
答案 0 :(得分：1)
大家好，我在尝试实现加载程序时遇到了一些错误 经理与我的内容提供商和数据库一起使用
您正尝试从getView方法中的游标访问该游标中不存在的列。我无法帮助你解决其他问题，因为我不知道你是如何进行查询的（所以请检查用于使字符串出现在数据库中的查询中的列）。
另外，我建议你按照一些关于适配器的教程，你目前在getView方法（查询数据库）中所做的事情是非常可怕的。你可能不需要那个查询，因为你应该使用加载器返回的游标（你也设置了适配器）