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Ich bin neu in Android-Entwicklung und auch vor kurzem von Eclipse auf Android Studio verschoben. Ich versuche eine Erinnerungs-App zu erstellen. Das Problem tritt auf, dass beim Eingeben der Notiz in die Erinnerung die Datenbank erzeugt, aber nicht auf dem Bildschirm, d. H. Listenansicht, angezeigt wird. Ich habe auch überprüft, dass die Datenbank erstellt wird und alle anderen Dinge gut funktionieren, außer dass meine DB nicht angezeigt wird.listview zeigt Datenbankeinträge in Eclipse, aber nicht in android Studio
Hier sind die DBhelper Klasse und Listview mit XML-Datei:
P. S. wenn andere Java-Klassen benötigt werden ... lass es mich wissen ...
DBHelper Klasse:
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="@drawable/bg_repeat" >
<RelativeLayout
android:id="@+id/menu_bar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#f804fc" >
<TextView
android:id="@+id/heading_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:padding="5dip"
android:shadowDx="0"
android:shadowDy="0"
android:shadowRadius="1"
android:shadowColor="#333333"
android:textColor="#d3e397"
android:textSize="18sp"
android:text="Remind Me" />
<ImageButton
android:id="@+id/imageButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:paddingTop="5dip"
android:paddingBottom="5dip"
android:paddingLeft="5dip"
android:paddingRight="10dip"
android:onClick="onClick"
android:background="@null"
android:src="@drawable/preferences" />
<ImageButton
android:id="@+id/imageButton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toLeftOf="@id/imageButton1"
android:paddingTop="5dip"
android:paddingBottom="5dip"
android:paddingLeft="10dip"
android:paddingRight="5dip"
android:onClick="onClick"
android:background="@null"
android:src="@drawable/add" />
</RelativeLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:background="@drawable/range"
android:gravity="center_vertical" >
<ImageButton
android:id="@+id/imageButton3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="5dip"
android:paddingBottom="5dip"
android:paddingLeft="5dip"
android:paddingRight="10dip"
android:onClick="onClick"
android:background="@null"
android:src="@drawable/left" />
<TextView
android:id="@+id/range_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:textColor="#ffffff" />
<ImageButton
android:id="@+id/imageButton4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="5dip"
android:paddingBottom="5dip"
android:paddingLeft="10dip"
android:paddingRight="5dip"
android:onClick="onClick"
android:background="@null"
android:src="@drawable/right" />
</LinearLayout>
<LinearLayout
android:id="@+id/list_view"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:padding="5dip"
android:orientation="vertical" >
<ListView android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:divider="@drawable/line"
android:dividerHeight="3dip"
android:listSelector="@android:color/transparent"
android:cacheColorHint="#00000000"
android:drawSelectorOnTop="false" />
<TextView android:id="@android:id/empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:textColor="#777777"
android:text="No data" />
</LinearLayout>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingRight="3dip"
android:background="#5c755e"
android:gravity="right"
android:textColor="#3d4935"
android:textSize="10sp"
android:textStyle="italic"
android:text="(c) appsrox.com" />
</LinearLayout>
REMINDER KLASSE:
public class reminder extends ListActivity {
private static final String TAG = "MainActivity";
private TextView headingText;
private Cursor c;
private TextView rangeText;
private ViewSwitcher vs;
private SQLiteDatabase db;
private Typeface font;
private AlertDialog disclaimer;
public final Calendar cal = Calendar.getInstance();
public final Date dt = new Date();
private String[] monthArr;
private Alarm alarm = new Alarm();
private AlarmMsg alarmMsg = new AlarmMsg();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_reminder);
findViews();
db = RemindMe.db;
font = Typeface.createFromAsset(getAssets(), "fonts/OpenSans-
Semibold.ttf");
headingText.setTypeface(font);
monthArr = getResources().getStringArray(R.array.spinner3_arr);
int r = RemindMe.getDateRange();
switch(r) {
case 3: // Yearly
cal.set(Calendar.MONTH, 0);
case 2: // Monthly
cal.set(Calendar.DATE, 1);
case 1: // Weekly
if (r==1) cal.set(Calendar.DATE, cal.getFirstDayOfWeek());
case 0: // Daily
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
}
registerForContextMenu(getListView());
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putLong("cal", cal.getTimeInMillis());
}
@Override
protected void onRestoreInstanceState(Bundle state) {
super.onRestoreInstanceState(state);
cal.setTimeInMillis(state.getLong("cal"));
}
private void findViews() {
headingText = (TextView) findViewById(R.id.heading_tv);
rangeText = (TextView) findViewById(R.id.range_tv);
vs = (ViewSwitcher) findViewById(R.id.view_switcher);
}
private String getRangeStr() {
int date = cal.get(Calendar.DATE);
int month = cal.get(Calendar.MONTH);
int year = cal.get(Calendar.YEAR);
dt.setTime(System.currentTimeMillis());
switch(RemindMe.getDateRange()) {
case 0: // Daily
if (date==dt.getDate() && month==dt.getMonth() &&
year==dt.getYear()+1900) return "Today";
else return date+" "+monthArr[month+1];
case 1: // Weekly
return date+" "+monthArr[month+1] + move(+1) + " - " +
cal.get(Calendar.DATE)+" "+monthArr[cal.get(Calendar.MONTH)+1] + move(-1);
case 2: // Monthly
return monthArr[month+1]+" "+year;
case 3: // Yearly
return year+"";
}
return null;
}
private Cursor createCursor() {
if(c!=null){
c = RemindMe.dbHelper.listNotifications(db,
cal.getTimeInMillis()+move(+1), cal.getTimeInMillis()+move(-1));
startManagingCursor(c);
return c;}
else return null;
}
@Override
protected void onResume() {
super.onResume();
SimpleCursorAdapter adapter = new SimpleCursorAdapter(
this,
R.layout.reminder_row,
createCursor(),
new String[]{Alarm.COL_NAME, AlarmMsg.COL_DATETIME,
AlarmMsg.COL_DATETIME, AlarmMsg.COL_DATETIME, AlarmMsg.COL_DATETIME},
new int[]{R.id.msg_tv, R.id.year_tv, R.id.month_tv,
R.id.date_tv, R.id.time_tv});
adapter.setViewBinder(new ViewBinder() {
@Override
public boolean setViewValue(View view, Cursor cursor, int
columnIndex) {
if (view.getId() == R.id.msg_tv) return false;
TextView tv = (TextView)view;
long time = cursor.getLong(columnIndex);
dt.setTime(time);
switch(view.getId()) {
case R.id.year_tv:
tv.setText(String.valueOf(dt.getYear()+1900));
break;
case R.id.month_tv:
tv.setText(monthArr[dt.getMonth()+1]);
break;
case R.id.date_tv:
tv.setText(String.valueOf(dt.getDate()));
break;
case R.id.time_tv:
long now = System.currentTimeMillis();
String txt = RemindMe.showRemainingTime() ?
Util.getRemainingTime(time, now) : Util.getActualTime(dt.getHours(),
dt.getMinutes());
if (TextUtils.isEmpty(txt)) txt =
Util.getActualTime(dt.getHours(), dt.getMinutes());
tv.setText(txt);
RelativeLayout parent = (RelativeLayout)tv.getParent();
TextView tv2 = (TextView)
parent.findViewById(R.id.msg_tv);
if (time < now)
tv2.setTextColor(Color.parseColor("#555555"));
else tv2.setTextColor(Color.parseColor("#587498"));
break;
}
return true;
}
});
setListAdapter(adapter);
rangeText.setText(getRangeStr());
}
private String move(int step) {
switch(RemindMe.getDateRange()) {
case 0:
cal.add(Calendar.DATE, 1*step);
break;
case 1:
cal.add(Calendar.DATE, 7*step);
break;
case 2:
cal.add(Calendar.MONTH, 1*step);
break;
case 3:
cal.add(Calendar.YEAR, 1*step);
break;
}
return "";
}
public void onClick(View v) {
switch (v.getId()) {
case R.id.imageButton1:
startActivity(new Intent(this, Settings_Activity.class));
break;
case R.id.imageButton2:
startActivity(new Intent(this, AddAlarmActivity.class));
break;
case R.id.imageButton3:
move(-1);
rangeText.setText(getRangeStr());
((SimpleCursorAdapter)getListAdapter()).changeCursor(createCursor());
break;
case R.id.imageButton4:
move(+1);
rangeText.setText(getRangeStr());
((SimpleCursorAdapter)getListAdapter()).changeCursor(createCursor());
break;
case R.id.toggleButton1:
vs.showNext();
break;*/
}
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo
menuInfo) {
if (v.getId() == android.R.id.list) {
getMenuInflater().inflate(R.menu.reminder_context_menu, menu);
menu.setHeaderTitle("Choose an Option");
menu.setHeaderIcon(R.drawable.ic_dialog_menu_generic);
AdapterView.AdapterContextMenuInfo info =
(AdapterView.AdapterContextMenuInfo) menuInfo;
alarmMsg.setId(info.id);
alarmMsg.load(db);
if (alarmMsg.getDateTime() < System.currentTimeMillis())
menu.removeItem(R.id.menu_edit);
}
}
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info =
(AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
boolean refresh = false;
switch (item.getItemId()) {
case R.id.menu_edit:
alarmMsg.setId(info.id);
alarmMsg.load(db);
alarm.reset();
alarm.setId(alarmMsg.getAlarmId());
alarm.load(db);
showDialog(R.id.menu_edit);
break;
case R.id.menu_delete:
RemindMe.dbHelper.cancelNotification(db, info.id, false);
refresh = true;
Intent cancelThis = new Intent(this,
reminder_alarm_service.class);
cancelThis.putExtra(AlarmMsg.COL_ID, String.valueOf(info.id));
cancelThis.setAction(reminder_alarm_service.CANCEL);
startService(cancelThis);
break;
case R.id.menu_delete_repeating:
alarmMsg.setId(info.id);
alarmMsg.load(db);
RemindMe.dbHelper.cancelNotification(db, alarmMsg.getAlarmId(),
true);
refresh = true;
Intent cancelRepeating = new Intent(this,
reminder_alarm_service.class);
cancelRepeating.putExtra(AlarmMsg.COL_ALARMID,
String.valueOf(alarmMsg.getAlarmId()));
cancelRepeating.setAction(reminder_alarm_service.CANCEL);
startService(cancelRepeating);
break;
}
if (refresh) {
SimpleCursorAdapter adapter = (SimpleCursorAdapter)
getListAdapter();
adapter.getCursor().requery();
adapter.notifyDataSetChanged();
}
return true;
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
openContextMenu(v);
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case R.id.menu_edit:
return new AlertDialog.Builder(this)
.setTitle("Edit")
.setView(getLayoutInflater().inflate(R.layout.edit,
null))
.setCancelable(false)
.setPositiveButton("Ok", new
DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id)
{
Dialog d = (Dialog) dialog;
EditText msgEdit = (EditText)
d.findViewById(R.id.msg_et);
CheckBox soundCb = (CheckBox)
d.findViewById(R.id.sound_cb);
alarm.setSound(soundCb.isChecked());
if (!TextUtils.isEmpty(msgEdit.getText())) {
alarm.setName(msgEdit.getText().toString());
alarm.persist(db);
SimpleCursorAdapter adapter =
(SimpleCursorAdapter) getListAdapter();
adapter.getCursor().requery();
adapter.notifyDataSetChanged();
} else {
Toast.makeText(reminder.this, "Enter a
message", Toast.LENGTH_SHORT).show();
}
}
})
.setNegativeButton("Cancel", new
DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id)
{
dialog.cancel();
}
})
.create();
}
return super.onCreateDialog(id);
}
@Override
protected void onPrepareDialog(int id, Dialog dialog) {
super.onPrepareDialog(id, dialog);
switch (id) {
case R.id.menu_edit:
EditText msgEdit = (EditText) dialog.findViewById(R.id.msg_et);
CheckBox soundCb = (CheckBox)
dialog.findViewById(R.id.sound_cb);
msgEdit.setText(alarm.getName());
soundCb.setChecked(alarm.getSound());
break;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.reminder_options_menu, menu);
return true;
}
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
if (getListAdapter().isEmpty()) {
menu.findItem(R.id.menu_delete_all).setEnabled(false);
} else {
menu.findItem(R.id.menu_delete_all).setEnabled(true);
}
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_delete_all:
String startTime = cal.getTimeInMillis()+move(+1);
String endTime = cal.getTimeInMillis()+move(-1);
RemindMe.dbHelper.cancelNotification(db, startTime, endTime);
Intent cancelAll = new Intent(this,
reminder_alarm_service.class);
cancelAll.putExtra(Alarm.COL_FROMDATE, startTime);
cancelAll.putExtra(Alarm.COL_TODATE, endTime);
cancelAll.setAction(reminder_alarm_service.CANCEL);
startService(cancelAll);
SimpleCursorAdapter adapter = (SimpleCursorAdapter)
getListAdapter();
adapter.getCursor().requery();
adapter.notifyDataSetChanged();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onDestroy() {
if (disclaimer != null)
disclaimer.dismiss();
super.onDestroy();
}
}
Bitte fügen Sie den entsprechenden Code aus der Aktivität, die den ListView-Adapter setzt. – MikeT
Ich bezweifle sehr, dass es sich um den Übergang von Eclipse zu Android Studio handelt. – SuperStormer
Fügen Sie auch Ihren Code ein, der die Listenansicht erstellt – SuperStormer