Simplest error SimpleCursorAdapter
So my code is:
private class getRankedTeamsTask extends AsyncTask<ApiConnector,Long,JSONArray> {
@Override
protected JSONArray doInBackground(ApiConnector... params) {
// it is executed on Background thread
return params[0].getRankedTeams();
}
@Override
protected void onPostExecute(JSONArray jsonArray) {
try {
JSONObject json = null;
if (jsonArray != null) {
json = jsonArray.getJSONObject(0);
String[] columns = new String[6];
for(int i = 0; i<json.length(); i++){
columns[i] = json.names().getString(i);
}
MatrixCursor matrixCursor = new MatrixCursor(columns);
startManagingCursor(matrixCursor);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jo = jsonArray.getJSONObject(i);
matrixCursor.addRow(new Object[] {jo.getString("teamName"), jo.getString("loses"), jo.getString("points"),
jo.getString("ranking"), jo.getString("wins")});
};
int[] toViewIDs = new int[]
{R.id.teamNameLV, R.id.losesLV, R.id.pointsLV, R.id.rankLV, R.id.winsLV};
SimpleCursorAdapter adapter
= new SimpleCursorAdapter(
this,
R.layout.custom_ranking,
matrixCursor,
columns,
toViewIDs
);
rankingList.setAdapter(adapter);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
The code is getting data from the database and I am trying to add data to the custom dynamic ListView
, but I am getting some strange errors that prevent the application from starting. Can anyone help me? I have seen many posts and tutorials about this and I only found this way, but I get an error and they don’t.
mistake:
Error:(92, 31) error: no suitable constructor found for SimpleCursorAdapter(RankingActivity.getRankedTeamsTask,int,MatrixCursor,String[],int[])
constructor SimpleCursorAdapter.SimpleCursorAdapter(Context,int,Cursor,String[],int[],int) is not applicable
(actual and formal argument lists differ in length)
constructor SimpleCursorAdapter.SimpleCursorAdapter(Context,int,Cursor,String[],int[]) is not applicable
(actual argument RankingActivity.getRankedTeamsTask cannot be converted to Context by method invocation conversion)
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By using this
in the constructor SimpleCursorAdapter
, you are referring to the include class, which getRankedTeamsTask
:
SimpleCursorAdapter adapter
= new SimpleCursorAdapter(
this,
R.layout.custom_ranking,
matrixCursor,
columns,
toViewIDs
);
However, the first argument must be an instance Context
, which is your activity, so you must replace it with the following:
SimpleCursorAdapter adapter
= new SimpleCursorAdapter(
RankingActivity.this,
R.layout.custom_ranking,
matrixCursor,
columns,
toViewIDs
);
Please note, this try- to-use constructor is deprecated on a per-document basis, you should use this instead.
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