So I have a weird problem. I have 2 Activities I'm working on. One of the Activities displays a ListView whose data is grabbed via a long Extra I use to fetch the results via a WHERE clause in the database.query. The other Activity is called when a ListView item is clicked, allowing someone to add something to the database for the ListView.
The activity names are DaysActivity.java (the activity with the listview) and DayAddActivity.java (the Activity that allows someone to add a day, which then shows up in the DaysActivity.java ListView).
The problem I'm having is, when I finish() DayAddActivity.java it goes back to DaysActivity and the ListView is still there fully populated. However, if I hit the back button in DayAddActivity.java (the button to the left of the title in the action bar with my app icon), when it goes back to DaysActivity.java, the ListView is empty/gone.
Heres the code for both:
DaysActivity.java:
package com.gauvion.gfit;
import android.annotation.SuppressLint;
import android.app.ListActivity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;
public class DaysActivity extends ListActivity {
private DaysDataSource datasource;
private SimpleCursorAdapter dataAdapter;
private boolean isEditing = false;
private Toast toast_deleted;
private String[] columns = new String[] { MySQLiteHelper.COLUMN_NAME, MySQLiteHelper.COLUMN_DAY };
private int[] to;
private long routineDataID;
private String routineDataName;
@SuppressLint("ShowToast")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_days);
routineDataID = getIntent().getLongExtra("routineDataID", 0);
routineDataName = getIntent().getStringExtra("routineDataName");
setTitle(routineDataName);
toast_deleted = Toast.makeText(this, "", Toast.LENGTH_SHORT);
datasource = new DaysDataSource(this);
datasource.open();
Cursor cursor = datasource.fetchAllDays(routineDataID);
to = new int[] { R.id.listitem_day_name, R.id.listitem_day_day };
dataAdapter = new SimpleCursorAdapter(this, R.layout.listitem_day, cursor, columns, to, 0);
setListAdapter(dataAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.activity_days, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Cursor cursor = datasource.fetchAllDays(routineDataID);
switch (item.getItemId()) {
case R.id.button_days_add:
Intent startDayAdd = new Intent(this, DayAddActivity.class);
startDayAdd.putExtra("routineDataID", routineDataID);
this.startActivity(startDayAdd);
return true;
case R.id.button_days_edit:
to = new int[] { R.id.listitem_day_edit_name, R.id.listitem_day_edit_day };
dataAdapter = new SimpleCursorAdapter(this, R.layout.listitem_day_edit, cursor, columns, to, 0);
setListAdapter(dataAdapter);
isEditing = true;
invalidateOptionsMenu();
return true;
case R.id.button_days_edit_done:
to = new int[] { R.id.listitem_day_name, R.id.listitem_day_day };
dataAdapter = new SimpleCursorAdapter(this, R.layout.listitem_day, cursor, columns, to, 0);
setListAdapter(dataAdapter);
isEditing = false;
invalidateOptionsMenu();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
menu.findItem(R.id.button_days_edit).setVisible(!isEditing);
menu.findItem(R.id.button_days_edit_done).setVisible(isEditing);
return true;
}
@Override
protected void onResume() {
datasource.open();
Cursor cursor = datasource.fetchAllDays(routineDataID);
dataAdapter.changeCursor(cursor);
super.onResume();
}
@Override
protected void onPause() {
datasource.close();
super.onPause();
}
}
DayAddActivity.java:
package com.gauvion.gfit;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
import android.support.v4.app.NavUtils;
public class DayAddActivity extends Activity {
private RoutinesDataSource datasource;
private EditText dayName;
private Spinner dayDay;
private Button saveButton;
private long routineDataID;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_day_add);
routineDataID = getIntent().getLongExtra("routineDataID", 0);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_day_add, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
public void cancelDay(View view) {
this.finish();
}
}
The cancelDay() function is called when a "Cancel" button is clicked in activity_day_add.xml. Like I said, when I click the "Cancel" button inside of DayAddActivity.java, it goes back to DaysActivity.java and the ListView is fine. All data is there. However, if I press the back button in the action bar (the button containing a back arrow and my app icon beside the title of the Activity) the ListView for DaysActivity.java is empty/gone, and the title is also empty (because this is also generated through an Extra String value).
