データベースが更新された後、アダプターに変更の通知を受け取ることができません。リストが更新されていることを確認するには、アクティビティを終了して戻る必要があります。私が読んだいくつかのアイデアを試してみましたが、運がなかったので、誰かがこのバグがどこにあるかを見ることができることを願ってコードを投稿すると思いました. ありがとう！
//public class ViolationsList extends ListActivity {
public class ViolationsList extends Activity {
// protected ListView violationsList;
private static final String TAG = "MyActivity";
protected static String violation = "";
protected String graph_or_fql;
protected String myFriendID = "not set";
protected String picture = "";
protected String response = "";
protected String name = "";
boolean violatorSelected;
long friendId = 0;
private Cursor cursor=null;
//this is the array list for the custom violations from the database
private ArrayList<String> myCustomsArrayList = new ArrayList<String>();
//string array for custom violations
private String[] customViols;
//array list for building your three arrays into one array
private ArrayList<String> violationsCompArray = new ArrayList<String>();
String[] violations1;
String[] violations2;
ListView list;
private SpecialAdapter adapter;
//the view holder for the listview
static class ViewHolder {
TextView text;
}
//
private class SpecialAdapter extends BaseAdapter {
//Defining the background color of rows. The row will alternate between green light and green dark.
private int[] colors = new int[] { 0xff000000, 0xff888888, 0xffCCCCCC };
private LayoutInflater mInflater;
Typeface font1 = Typeface.createFromAsset(getAssets(), "fonts/Colossalis-Bold.ttf");
Typeface font2 = Typeface.createFromAsset(getAssets(), "fonts/helveticaneue.ttf");
//The variable that will hold our text data to be tied to list.
//private String[] data;
private ArrayList data = new ArrayList();
//public SpecialAdapter(Context context, String[] items) {
public SpecialAdapter(Context context, ArrayList items) {
mInflater = LayoutInflater.from(context);
this.data = items;
}
@Override
public int getCount() {
//return data.length;
return data.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public void notifyDataSetChanged() {
// TODO Auto-generated method stub
super.notifyDataSetChanged();
}
//A view to hold each row in the list
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// A ViewHolder keeps references to children views to avoid unneccessary calls
// to findViewById() on each row.
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.row, null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.headline);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
// Bind the data efficiently with the holder.
holder.text.setText((CharSequence) data.get(position));
//Set the background color of the holder
int colorPos = position % colors.length;
if ((holder.text.getText().toString().equals("ORIGINALS")) || (holder.text.getText().toString().equals("CUSTOM"))) {
Log.v(TAG, holder.text.getText().toString());
colorPos=1;
holder.text.setTypeface(font1);
//holder.text.setTextColor(Color.parseColor("#000000"));
} else if ("Make your own".equals(holder.text.getText().toString())) {
Log.v(TAG, holder.text.getText().toString());
colorPos=2;
}else {
colorPos=0;
holder.text.setTypeface(font2);
}
convertView.setBackgroundColor(colors[colorPos]);
return convertView;
}
}
////code for the custom violations database
private void insertCustom(String newViolation) {
DatabaseHelper databaseHelper = new DatabaseHelper(this);
SQLiteDatabase db = databaseHelper.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(DatabaseHelper.TITLE, newViolation);
db.insert("customViolations", DatabaseHelper.TITLE, cv);
cursor = db.query("customViolations",null, null, null, null, null, null);
startManagingCursor(cursor);
Log.v(TAG, "cursor data = " + cursor.toString());
cursor.requery();
db.close();
updateData();
adapter.notifyDataSetChanged();
}
private void DeleteCustom(String newViolation)
{
DatabaseHelper databaseHelper = new DatabaseHelper(this);
SQLiteDatabase db = databaseHelper.getWritableDatabase();
db.delete("customViolations", "myViolation" + "=?", new String[] { violation });
Log.v(TAG, violation);
db.close();
Log.v(TAG, "delete your custom violation");
cursor.requery();
updateData();
adapter.notifyDataSetChanged();
}
/////code to log cursor info KEEP FOR TESTING!!!!
public void logCursorInfo(Cursor cursor1) {
Log.i(TAG, "*** Cursor Begin *** " + " Results:" + cursor1.getCount() + " Columns: " + cursor1.getColumnCount());
//print column names
String rowHeaders = "|| ";
for (int i = 0; i < cursor1.getColumnCount(); i++) {
rowHeaders = rowHeaders.concat(cursor1.getColumnName(i) + " || ");
}
//print records
cursor1.moveToFirst();
while (cursor1.isAfterLast() == false) {
String rowResults = "|| ";
for (int i = 0; i < cursor1.getColumnCount(); i++) {
rowResults = rowResults.concat(cursor1.getString(i) + " || ");
}
Log.i(TAG, "Row " + cursor1.getPosition() + ": " + rowResults);
cursor1.moveToNext();
}
Log.i(TAG, "*** Cursor End ***");
}
///code to bring up text entry alert dialog
public void enterText() {
//insert dialog builder
AlertDialog.Builder alert = new AlertDialog.Builder(this);
String Title = getResources().getString(R.string.dialogTitle);
alert.setTitle(Title);
//alert.setMessage("Message");
// Set an EditText view to get user input
final EditText input = new EditText(this);
int maxLength = 60;
InputFilter[] FilterArray = new InputFilter[1];
FilterArray[0] = new InputFilter.LengthFilter(maxLength);
input.setFilters(FilterArray);
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Editable value = input.getText();
// Do something with value!
insertCustom(value.toString());
cursor.requery();
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// Canceled.
}
});
alert.show();
}
///code to bring up text entry alert dialog
public void editYourViolation() {
//insert dialog builder
AlertDialog.Builder yourEdit = new AlertDialog.Builder(this);
String Title = getResources().getString(R.string.customdialogTitle);
yourEdit.setTitle(Title);
yourEdit.setPositiveButton("Use", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// Do something with value!
createViolation();
}
});
yourEdit.setNegativeButton("Delete", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// Canceled.
DeleteCustom(violation);
}
});
yourEdit.show();
}
///create the violation
public void createViolation() {
Intent myIntent = new Intent(getApplicationContext(),
Selection.class);
myIntent.putExtra("friendId", friendId);
myIntent.putExtra("name", name);
myIntent.putExtra("picture", picture);
myIntent.putExtra("violation", violation);
myIntent.putExtra("violatorSelected", violatorSelected);
startActivity(myIntent);
}
public void querydatabase() {
DatabaseHelper databaseHelper = new DatabaseHelper(this);
SQLiteDatabase db = databaseHelper.getWritableDatabase();
cursor = db.query("customViolations",null, null, null, null, null, null);
}
public void populateArray() {
cursor.moveToFirst();
while(!cursor.isAfterLast()) {
myCustomsArrayList.add(cursor.getString(cursor.getColumnIndex(DatabaseHelper.TITLE)));
cursor.moveToNext();
}
customViols = (String[]) myCustomsArrayList.toArray(new String[myCustomsArrayList.size()]);
}
private void updateData() {
querydatabase();
populateArray();
for(String i : violations1)
{
violationsCompArray.add(i);
}
//these are your custom violations
for(String z : customViols)
{
violationsCompArray.add(z);
}
//original violations list
for(String s : violations2)
{
violationsCompArray.add(s);
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle extras = getIntent().getExtras();
response = extras.getString("API_RESPONSE");
graph_or_fql = extras.getString("METHOD");
friendId = extras.getLong("friendId");
name = extras.getString("name");
picture = extras.getString("picture");
violatorSelected = extras.getBoolean("violatorSelected");
Log.v(TAG, "violations list created");
setContentView(R.layout.violations_list);
violations1 = getResources().getStringArray(
R.array.violations_array1);
violations2 = getResources().getStringArray(
R.array.violations_array2);
ListView list = (ListView) findViewById(R.id.violations_list);
list.setTextFilterEnabled(true);
//set up the database connection and cursor for the custom violations
updateData();
SpecialAdapter adapter = new SpecialAdapter(this, violationsCompArray);
list.setAdapter(adapter);
///new onItemClickListener
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View view,
int position, long id) {
for(String i : customViols)
{
Log.v(TAG, i);
}
String text = (String) ((TextView) view).getText();
violation = text;
//the make your own value will launch the text editor
if ("Make your own".equals(violation)) {
Log.v(TAG, "create the code for Make your own screen");
enterText();
//these values are section headers and should have no selection effect
}else if("ORIGINALS".equals(violation) || "CUSTOM".equals(violation)) {
Toast.makeText(getApplicationContext(), violation,
Toast.LENGTH_SHORT).show();
//test to see if the violation is from the custom violations list
}else if(Arrays.asList(customViols).contains(violation)) {
editYourViolation();
//use one of the originals
}else {
createViolation();
}
}
});
}
}