Develop Reference

When is the ANDROID Contact Group PHYSICALLY removed instead of being marked as deleted?

I am trying to permanently remove a Android Contact Group and have used the Sync parameter and it always appears the record is simply marked as deleted and not physically removed. Can anyone explain how/when, if ever, the Contract group row is deleted permanently or show a snippet of code demonstrating how to do this? The records I am trying to remove are ones that I added, so they are not Read-Only.
Linked back to https://stackoverflow.com/a/21376905/5398898
My Delete Code:
private void RemoveGroup()
{
TextView tv = (TextView) this.findViewById(R.id.helloworld);
int[] startId = {10};//{6, 7, 8, 9, 10, 11};
String groupName = "My New Contacts";
Uri mUri = ContactsContract.Groups.CONTENT_URI;
mUri.buildUpon().appendQueryParameter(ContactsContract.CALLER_IS_SYNCADAPTER, "true").build();
for (int n = 0; n < startId.length; n++) {
groupCount = startId[n];
ContentValues values = new ContentValues();
values.put(ContactsContract.Groups._ID, groupCount);
try {
getContentResolver().delete(mUri, values.toString(),null);
} catch (Exception ex) {
tv.setText(ex.getMessage());
}
}
}
Result when reading the groups:
Image can be found here http://i.stack.imgur.com/5OOfc.png

You are building the correct Uri but not using it, try like this
Uri mUri = ContactsContract.Groups.CONTENT_URI;
mUri = mUri.buildUpon().appendQueryParameter(ContactsContract.CALLER_IS_SYNCADAPTER, "true").build();

Update item ID when deleting

I have 5 empty TextViews where I add the names. After adding a name, it is stored in a database. The database consist on 2 columns, the item ID and the item NAME. This is an example of what I'm doing:
- Mark1 //ID=1, NAME= Mark1
- Mark2 //ID=2, NAME= Mark2
- Mark3 //ID=3, NAME= Mark3
- Empty
- Empty
I add and edit perfectly the textViews, but I'm facing a problem when deleting. This has something to do with the way I'm getting the values from the database, I'll explain:
Every time the app starts, or I edit, add or delete one element, what I do is get the items from the database, get them into a Map, and copy them into the textviews (whose at a first time are invisible) making visible just the ones that have a name setted.
This is the code I use to do that:
public void getTravelers() {
/*Create map where store items*/
Map<Integer, String> nameList = new HashMap<Integer, String>();
/*Lon in providers query() method to get database's items and save them into the map*/
Cursor c = getContentResolver().query(TravelersProvider.CONTENT_URI, PROJECTION, null, null, null);
if (c.moveToFirst()) {
do {
nameList.put(Integer.parseInt(c.getString(c.getColumnIndex(Travelers._ID))), c.getString(c.getColumnIndex(Travelers.NAME)));
}while(c.moveToNext());
}
if (c != null && !c.isClosed()) {
c.close();
}
/*Check size*/
int size = nameList.size();
if (size >= 1) {
/*Save items in TextViews*/
//TODO: This is the code I should fix
for (int i = 0; i <= size; i++) {
if (i==1) {
traveler1.setText(nameList.get(i).toString());
traveler1.setVisibility(View.VISIBLE);
}
if (i==2) {
traveler2.setText(nameList.get(i).toString());
traveler2.setVisibility(View.VISIBLE);
}
if (i==3) {
traveler3.setText(nameList.get(i).toString());
traveler3.setVisibility(View.VISIBLE);
}
if (i==4) {
traveler4.setText(nameList.get(i).toString());
traveler4.setVisibility(View.VISIBLE);
}
if (i==5) {
traveler5.setText(nameList.get(i).toString());
traveler5.setVisibility(View.VISIBLE);
}
}
}
}
The problem comes in the for loop. Let's supposse that from the items named above, I want to delete Mark2 with ID=2, so then the size of the new Map would be 2, and it would enter to (i == 1) and (i == 2). But when entering to this last one, it would do traveler2.setText(nameList.get(2).toString()); and as seen, there is no element existing with the ID=2 because that is the one that I've deleted and it throws a NPE.
So my question is, what would be the right way to do this without facing this problem?

You should go for switch case other than for loop. Than code will not be in loop.

Finally I get what I need just changing the Key value of the Map that was the same as the ID of the database:
if (c.moveToFirst()) {
int key = 0;
do {
key++;
nameList.put(key, c.getString(c.getColumnIndex(Travelers.NAME)));
}while(c.moveToNext());
}
if (c != null && !c.isClosed()) {
c.close();
}
Basically this way I don't need to change nothing more as now the key value of the Map will match with the Textview position

android loop through database with cursor speed

I have read several posts here on speed issues when looping through a cursor and tried the answers given in these posts such as e.g. do not use getcolumnindex in the loop call this once etc.
However with a database having around 2400 records it takes around 3 to 5 minutes to finish.
The loop is running in an async task method so that it does not hang up the device and the database is handled via a database adapter.
The loop code is as follows :
while (!exportrec.isAfterLast()) {
if ( exportrec.moveToNext() ) {
fulldate = exportnumberformatter(exportrec.getInt(daye))
+"/"+exportnumberformatter(exportrec.getInt(monthe))+"/"
+String.valueOf(exportrec.getInt(yeare));
fulltime = exportnumberformatter(exportrec.getInt(houre))+":"
+exportnumberformatter(exportrec.getInt(mine))+":"
+exportnumberformatter(exportrec.getInt(sece));
noiseid = exportrec.getInt(typee);
exportedinfo += exporttypes[id] +","+exportrec.getString(notee)+","+
fulldate+","+fulltime+" \n" ;
}
}
The exportnumberformatter does the following :
public String exportnumberformatter(int i) {
String result = Integer.toString(i);
if (result.length() >1 ) {
return Integer.toString(i);
}
String zeroprefix = "";
zeroprefix = "0"+result;
return zeroprefix ;
}
The cursor is called as follows before the loop to get the data :
exportrec = MD.GetAllLogs(2, "date_sort");
exportrec.moveToFirst();
The MD is the database adapter and the GetAllLogs Method (this has been played with to try and speed things up and so the date_sort that is used is really ignored here):
public Cursor GetAllLogs(Integer i,String sortfield)
{
String sorted = "";
if (i == 1 ) {
sorted = "DESC";
} else if (i == 2) {
sorted = "ASC";
}
return mDB.query(DB_TABLE, new String[] {COL_ID, COL_TYPE,COL_IMAGE, COL_INFO,COL_IMAGE,COL_HOUR,COL_SEC,COL_MIN,COL_DAY,COL_MON,COL_YEAR,COL_SORT_DATE},
null, null, null, null, COL_ID+" "+sorted);
}
When I created the table in the database it had no indexes so I created these via the upgrade method. However they did not error or appear to fail when I did this but what I do not know is A) does the database/table need rebuilding after an index is created and B) how to tell if they have been created ? the two indexes were based on the ID as the first and a field that holds the year month day hour minute second all in on Long Integer.
I am concerned that the loop appears to be taking this long to read through that many records.
Update:
rtsai2000's and the suggestion from CL answer has improved the speed from minutes to seconds

Your exportedInfo String is growing and growing. Save the results in an array and Stringify later (such as with StringBuilder).
You are not closing your cursor after reading the records.
List<String> exportedInfo = new ArrayList<String>();
Cursor exportrec = GetAllLogs();
try {
while (exportrec.moveToNext()) {
String info = String.format("%s, %s, %02d/%02d/%02d, %02d:%02d:%02d",
exporttypes[id],
exportrec.getString(notee),
exportrec.getInt(daye),
exportrec.getInt(monthe),
exportrec.getInt(yeare),
exportrec.getInt(houre),
exportrec.getInt(mine),
exportrec.getInt(sece));
exportedInfo.add(info);
}
} finally {
exportrec.close();
}
return exportedInfo;

Recorded Video is not Visible in my other Activity untill I reboot my Tablet Asus Transformer

I have created a Project having many activities. One activity is to record the video, that is working fine. I can see the recorded video in my specified folder without restart my tablet.
But when I try to find all the videos in that folder in some other activity using query, see code below. Then I can't see my recorded video until I restart my tablet. I can see just old recorded videos before starting my tablet. I couldn't understand this strange behavior.
Can anyone put some light on this issue??
Thanks.
private void initVideosId() { // getting the videos id in Video Folder of SD Card
try {
// Here we set up a string array of the thumbnail ID column we want
// to get back
String[] proj = { _ID };
//Querying for the videos in VideoGallery folder of SD card
// Now we create the cursor pointing to the external thumbnail store
_cursor = managedQuery(_contentUri, proj, // Which columns to return
MEDIA_DATA + " like ? ", // WHERE clause; which rows to
// return (all rows)
new String[] { "%VideoGallery%" }, // WHERE clause selection
// arguments (none)
null); // Order-by clause (ascending by name)
int count = _cursor.getCount();
// We now get the column index of the thumbnail id
_columnIndex = _cursor.getColumnIndex(_ID);
// initialize
_videosId = new int[count];
// move position to first element
_cursor.moveToFirst();
for (int i = 0; i < count; i++) {
int id = _cursor.getInt(_columnIndex);
//
_videosId[i] = id;
//
_cursor.moveToNext();
//
}
} catch (Exception ex) {
showToast(ex.getMessage().toString());
}
}

If you stored the file on external storage, you need to use MediaScannerConnection to get the MediaStore to index that file, such as:
MediaScannerConnection.scanFile(
this,
new String[] {file.getAbsolutePath()},
null,
new OnScanCompletedListener() {
#Override
public void onScanCompleted(String path, Uri uri) {
// do something if you want
}
});

How to read songs from Google cloud or device

Big picture: GUI shows user a list of their playlists. User picks one. Program passes chosen playlist to next activity which displays the songs in that playlist.
Problem: I can display the playlists and register the users choice, but I can't seem to display the songs of that play list.
Yes, I've see the following questions:
How to query for songs in playlists on Android SDK?
Given an Android music playlist name, how can one find the songs in the playlist?
What is the String 'volumeName' argument of MediaStore.Audio.Playlists.Members.getContentUri referring to?
As you can see in my code, I've done my best to implement those solutions, but to no avail.
Things to keep in mind: I'm testing this on a Galaxy Nexus, so no SDcard. Just internal storage and music in the cloud. I need it to work in any scenario (internal, external, or cloud). It currently works in none of those.
//#SuppressWarnings ("serial)")
public class CreationActivity extends Activity {
private final String [] STAR= {"*"};
//reads in all songs to an array
#Override
public void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
//set layout view and assign to variable
setContentView(R.layout.creation);
TableLayout myLayout = (TableLayout)findViewById(R.id.creationLayout);
try {
Bundle extras = getIntent().getExtras();
if (extras!=null){
//get the desired playlist and ID
String playlist = extras.getString("playlist");
Long playlistID = extras.getLong("playlistID");
ArrayList<song> songs = new ArrayList<song>();
//read in the songs from the playlist
String[] proj = {MediaStore.Audio.Playlists.Members.TITLE,
MediaStore.Audio.Playlists.Members.ARTIST,
MediaStore.Audio.Playlists.Members.DURATION};
//method 1
Cursor songCursor = getContentResolver().query(MediaStore.Audio.Playlists.Members.getContentUri(null,playlistID),
proj,
null,
null,
null);
//method 2
/*
Cursor songCursor = getContentResolver().query(Uri.parse("content://com.google.android.music.MusicContent/playlists/members"),
proj,
null,
null,
null);
*/
//method 3
/*
Uri membersUri = MediaStore.Audio.Playlists.Members.getContentUri("internal", playlistID);
Cursor membersCursor = managedQuery(membersUri, STAR, null, null, null);
*/
//then this part with methods 1 and 2
/*
if (songCursor.getCount() > 0) {
songCursor.moveToFirst();
do {
song currSong = new song();
currSong.title = songCursor.getString(0);
currSong.artist = songCursor.getString(1);
songs.add(currSong);
} while (songCursor.moveToNext());
}
songCursor.close();
*/
//or this part with method 3
/*
membersCursor.moveToFirst();
for(int s= 0; s<membersCursor.getCount(); s++,
membersCursor.moveToNext()){
song currSong = new song();
currSong.title = songCursor.getString(0);
currSong.artist = songCursor.getString(1);
songs.add(currSong);
}
membersCursor.close();
*/
}else{
Toast.makeText(getBaseContext(), "No songs",Toast.LENGTH_LONG).show();
}
} catch (NumberFormatException e){
}
}
}
No errors during compiling. But "Unfortunately Music App has unexpectedly quit." every time.
Thanks for the help!

I figured it out. The key was to use the playlist ID as a string immediately within the URI. See code below.
This is the part that will get the playlist names and IDs:
String[] proj = {MediaStore.Audio.Playlists.NAME, MediaStore.Audio.Playlists._ID};
Uri playlistUri = Uri.parse("content://com.google.android.music.MusicContent/playlists");
Cursor playlistCursor = getContentResolver().query(playlistUri, proj, null, null, null);
if (playlistCursor.getCount() > 0) {
playlistCursor.moveToFirst();
do {
nameList.add(playlistCursor.getString(0));
idList.add(playlistCursor.getLong(1));
} while (playlistCursor.moveToNext());
}
Then once you have the playlist ID you can query for the songs in the playlist. This is the part of code that actually queries for the info and puts it all in an array list. NOTE: "song" is a class I have defined elsewhere, where readSong is a method that assigns values to various values (title, artist, etc).
ArrayList<song> songs = new ArrayList<song>();
//read songs into library from the correct playlist
String[] proj = {MediaStore.Audio.Playlists.Members.TITLE, MediaStore.Audio.Playlists.Members.ARTIST, MediaStore.Audio.Playlists.Members.DURATION, MediaStore.Audio.Playlists.Members._ID};
Uri songUri = Uri.parse("content://com.google.android.music.MusicContent/playlists/" + playlistID + "/members");
Cursor songCursor = getContentResolver().query(songUri, proj, null, null, null);
if (songCursor.getCount() > 0) {
songCursor.moveToFirst();
do {
//create dummy song
song currSong = new song();
//read info to dummy var
currSong.readSong(songCursor);
//add instance to collection
songs.add(currSong);
} while (songCursor.moveToNext());
}
songCursor.close();
I hope this helps anybody else who was struggling with this!! Let me know if you have any comments on my method or ways to make it better!