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私はカスタムCursorAdapterを実装しました。このアダプターはCursorからデータを受け取り、そのほとんどをListViewに入れます。 ListViewのフィールドの1つに別のテーブルのデータが必要なので、ビューにそのピースを設定するにはデータベースを再度照会する必要があります。私のListViewは正常に動作しているようですが、以前はdbにデータがなく、空のタグ"no data in the db"が正しく表示されていました。 dbにデータがあるので、ListViewには何も表示されません！カスタムCursorAdapterはデータを表示しません
// get schedule cursor
scheduleInfo = dbInfo.getScheduleCursor(teamID, seasonID);
startManagingCursor(scheduleInfo);
ScheduleAdapter scheduleAdapter = new ScheduleAdapter(ScheduleMain.this, scheduleInfo);
setListAdapter(scheduleAdapter);
EDIT：チームのスケジュールを表示するようになっているカスタムアダプタを呼び出している アクティビティここでは、このアダプターに私の呼び出しは
public class ScheduleAdapter extends CursorAdapter {
private LayoutInflater mInflater;
private int mHomeAway, mOppFK, mLocation, mWhen, mOutcome, mType, mPlayed;
private String teamName;
public ScheduleAdapter(Context context, Cursor c) {
super(context, c);
// TODO Auto-generated constructor stub
mHomeAway = c.getColumnIndex(ScoreMasterDB.KEY_SCHHOMEAWAY);
mOppFK = c.getColumnIndex(ScoreMasterDB.KEY_SCHOPPFK);
mLocation = c.getColumnIndex(ScoreMasterDB.KEY_SCHLOCATION);
mWhen = c.getColumnIndex(ScoreMasterDB.KEY_SCHWHEN);
mOutcome = c.getColumnIndex(ScoreMasterDB.KEY_SCHOUTCOME);
mType = c.getColumnIndex(ScoreMasterDB.KEY_SCHTYPE);
mPlayed = c.getColumnIndex(ScoreMasterDB.KEY_SCHPLAYED);
mInflater = LayoutInflater.from(context);
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
// TODO Auto-generated method stub
return mInflater.inflate(R.layout.schedule_main_list, parent);
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
// TODO Auto-generated method stub
TextView homeAway = (TextView) view.findViewById(R.id.tvVsAt);
TextView oppName = (TextView) view.findViewById(R.id.tvScheduleListOpponent);
TextView location = (TextView) view.findViewById(R.id.tvScheduleListLocation);
TextView outcomeWhen = (TextView) view.findViewById(R.id.tvScheduleDateTimeResult);
TextView gameType = (TextView) view.findViewById(R.id.tvScheduleType);
ScoreMasterDB dbInfo = new ScoreMasterDB(context);
try {
dbInfo.open();
teamName = dbInfo.getTeamName(cursor.getInt(mOppFK));
dbInfo.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
homeAway.setText(cursor.getString(mHomeAway));
oppName.setText(teamName);
location.setText(cursor.getString(mLocation));
//set game time or outcome
if(cursor.getInt(mPlayed) == 0){
outcomeWhen.setText(cursor.getString(mWhen));
//set text style for outcome
if(cursor.getInt(mOutcome) == 1){
outcomeWhen.setTextAppearance(context, R.style.greenWinText);
}
}
gameType.setText(cursor.getString(mType));
}
}
です：ここに私のカスタムアダプタです。最初にチームを選択するダイアログを表示し、別のダイアログを表示して適切なシーズンを選択します。次に、一致するteamIDとseasonIDを持つスケジュールをdbに照会します。カスタムアダプターの理由は、スケジュールが相手を整数の外部キーとしてリストするので、相手の適切なチーム名を取得するためにアダプターのdbを照会する必要があるからです。
ここここ活性（コードのそのかなり多く）
package com.scoremaster.pro;
import android.app.Dialog;
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class ScheduleMain extends ListActivity implements OnItemClickListener,
OnClickListener, OnItemLongClickListener {
Dialog selectTeam, selectSeason, newSeason;
Cursor teamInfo, seasons, scheduleInfo;
ScoreMasterDB dbInfo;
ListView diaList, diaSeason;
int teamID, seasonID;
String teamNameG;
Button addNewSeason;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.schedule_main);
selectTeam = new Dialog(ScheduleMain.this);
selectTeam.setContentView(R.layout.schedule_main_dialog);
selectTeam.setTitle("Select Team");
dbInfo = new ScoreMasterDB(this);
try {
dbInfo.open();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
teamInfo = dbInfo.getTeamsCursor();
startManagingCursor(teamInfo);
if (teamInfo.getCount() == 0) {
Intent createTeamIntent = new Intent(
"com.scoremaster.pro.CREATETEAM");
createTeamIntent.putExtra("fromSchedule", true);
startActivity(createTeamIntent);
}
String[] columns = { ScoreMasterDB.KEY_TEAMNAME };
int[] to = { R.id.tvTeamSelectList };
//Bundle scheduleBundle = getIntent().getExtras();
//int whatToDo = scheduleBundle.getInt(")
diaList = (ListView) selectTeam.findViewById(R.id.lvScheduleDialog);
SimpleCursorAdapter teamListAdapter = new SimpleCursorAdapter(
ScheduleMain.this, R.layout.team_select_list, teamInfo,
columns, to);
diaList.setAdapter(teamListAdapter);
diaList.setOnItemClickListener(this);
selectTeam.show();
}
// listview onClick events
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
switch (parent.getId()) {
case R.id.lvScheduleDialog:
selectTeam.dismiss();
teamInfo.moveToPosition(position);
// set data on ScheduleMain
TextView teamName = (TextView) findViewById(R.id.tvScheduleTeam);
TextView teamAbbrev = (TextView) findViewById(R.id.tvScheduleAbbrev);
TextView teamLevel = (TextView) findViewById(R.id.tvScheduleLevel);
LinearLayout layTeam = (LinearLayout) findViewById(R.id.layScheduleTeam);
Button bAddSchedule = (Button) findViewById(R.id.bAddGame);
teamNameG = teamInfo.getString(1);
teamName.setText(teamInfo.getString(1));
teamAbbrev.setText(teamInfo.getString(2));
teamLevel.setText(teamInfo.getString(3));
bAddSchedule.setText("Add Game to Schedule");
bAddSchedule.setClickable(true);
teamID = teamInfo.getInt(0);
// set button if no team
if (teamInfo.getCount() == 0) {
}
// set listeners for bAddGame and laySheduleTeam
bAddSchedule.setOnClickListener(this);
layTeam.setOnClickListener(this);
// get season information
selectSeason = new Dialog(ScheduleMain.this);
selectSeason.setContentView(R.layout.schedule_season_dialog);
selectSeason.setTitle("Select Season");
seasons = dbInfo.getSeasonsCursor(teamID);
startManagingCursor(seasons);
String[] columns = { ScoreMasterDB.KEY_SEANAME };
int[] to = { R.id.tvTeamSelectList };
// set select season dialog listview elements
diaSeason = (ListView) selectSeason
.findViewById(R.id.lvSeasonDialog);
SimpleCursorAdapter seasonListAdapter = new SimpleCursorAdapter(
ScheduleMain.this, R.layout.team_select_list, seasons,
columns, to);
diaSeason.setAdapter(seasonListAdapter);
diaSeason.setOnItemClickListener(this);
diaSeason.setOnItemLongClickListener(this);
// set add button listenter
Button addSeason = (Button) selectSeason
.findViewById(R.id.bAddSeason);
addSeason.setOnClickListener(this);
// show dialog
selectSeason.show();
break;
case R.id.lvSeasonDialog:
// get seasonID
selectSeason.dismiss();
seasons.moveToPosition(position);
seasonID = seasons.getInt(0);
// get schedule cursor
scheduleInfo = dbInfo.getScheduleCursor(teamID, seasonID);
startManagingCursor(scheduleInfo);
//scheduleInfo.moveToFirst();
//String[] columns1 = {ScoreMasterDB.KEY_SEANAME};
//int[] to1 = {R.id.tvScheduleAddVsAt};
//SimpleCursorAdapter scheduleAdapter = new SimpleCursorAdapter(ScheduleMain.this, R.layout.schedule_main_list, seasons, columns1, to1);
ScheduleAdapter scheduleAdapter = new ScheduleAdapter(ScheduleMain.this, scheduleInfo);
setListAdapter(scheduleAdapter);
break;
}
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.bAddSeason:
selectSeason.dismiss();
newSeason = new Dialog(ScheduleMain.this);
newSeason.setContentView(R.layout.schedule_new_season);
newSeason.setTitle("New Season");
TextView teamName = (TextView) newSeason
.findViewById(R.id.tvNewSeasonTeamName);
teamName.setText("Create new season for the " + teamNameG);
addNewSeason = (Button) newSeason
.findViewById(R.id.bSubmitNewSeason);
addNewSeason.setOnClickListener(this);
newSeason.show();
break;
case R.id.bSubmitNewSeason:
TextView seasonName = (TextView) newSeason
.findViewById(R.id.etNewSeasonName);
String submitSeason = seasonName.getText().toString();
if (submitSeason.equalsIgnoreCase("")) {
Toast.makeText(ScheduleMain.this, "Please enter a season name",
Toast.LENGTH_SHORT).show();
} else {
try {
dbInfo.insertSeason(teamID, submitSeason);
} catch (Exception e) {
e.printStackTrace();
} finally {
Intent intent = getIntent();
finish();
startActivity(intent);
}
}
break;
case R.id.bAddGame:
Intent addGame = new Intent("com.scoremaster.pro.ADDGAME");
addGame.putExtra("teamID", teamID);
addGame.putExtra("seasonID", seasonID);
startActivity(addGame);
break;
case R.id.layScheduleTeam:
selectTeam.show();
break;
}
}
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
if (parent.getId() == R.id.lvSeasonDialog) {
seasons.moveToPosition(position);
int rowID = seasons.getInt(0);
dbInfo.removeSeason(rowID);
selectSeason.dismiss();
Intent intent = getIntent();
finish();
startActivity(intent);
return true;
} else {
return false;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
}
}
ビューを膨張DBクラスのgetScheduleCursor（）メソッドScheduleAdapterにおいて
public Cursor getScheduleCursor(int teamID, int seasonID){
String[] columnsSch = {KEY_ROWID, KEY_SCHHOMEAWAY, KEY_SCHOPPFK, KEY_SCHLOCATION, KEY_SCHWHEN, KEY_SCHOUTCOME, KEY_SCHTYPE, KEY_SCHPLAYED};
Cursor c = scoreMasterDB.query(DB_SCHEDULE_TABLE, columnsSch, KEY_SCHTEAMFK + "=" + teamID + " AND " + KEY_SCHSEASON + "=" + seasonID, null, null, null, null);
return c;
}
'getScheduleCursor'のクエリはどんな行を返しますか？ – Chopin
startManagingCursor（）を使用することをお勧めします。代わりに、LoaderManagerを使用してください。 –
@Chopin、それは行を返す。 – g2gsr