I know similar question has been asked before,
my code was working before, and now it does not, my app is the default dialer and is also a system app,
the canCurrentUserBlockNumbers(this) returns true, however always an empty cursor is returned now,
any suggestion?
Thank you
if (canCurrentUserBlockNumbers(this))
Toast.makeText(this, "ok", Toast.LENGTH_SHORT).show(); // I see this "OK" Toast
else
Toast.makeText(this, "KO", Toast.LENGTH_SHORT).show();
Cursor c = getContentResolver().query(BlockedNumberContract.BlockedNumbers.CONTENT_URI,
new String[]{BlockedNumberContract.BlockedNumbers.COLUMN_ID, BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER,
BlockedNumberContract.BlockedNumbers.COLUMN_E164_NUMBER}, null, null, null);
TextView tv = findViewById(R.id.textviewblockednumbers);
tv.setText("ciao");
//int numElements=(c.getColumnCount();
while (c.moveToNext()) {
String name = c.getString(c.getColumnIndexOrThrow(BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER));
tv.append(name);
tv.append(",");
c.close();
}
}
update for everyone interested,
with another phone of the same brand (Xiaomi) the cursor is not empty and I can read blocked numbers,
looks like a platform trouble
I'm trying to use UsageStatsManager to get the foreground app on a Nexus 5 with Marshmallow. I remember it used to work, but for some reason I'm getting null strings for package/class names now.
Here's my implementation
public String[] getForegroundPackageNameClassNameByUsageStats() {
String packageNameByUsageStats = null;
String classByUsageStats = null;
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
UsageStatsManager mUsageStatsManager = (UsageStatsManager)getSystemService("usagestats");
final long INTERVAL = 1000;
final long end = System.currentTimeMillis();
final long begin = end - INTERVAL;
final UsageEvents usageEvents = mUsageStatsManager.queryEvents(begin, end);
while (usageEvents.hasNextEvent()) {
UsageEvents.Event event = new UsageEvents.Event();
usageEvents.getNextEvent(event);
if (event.getEventType() == UsageEvents.Event.MOVE_TO_FOREGROUND) {
packageNameByUsageStats = event.getPackageName();
classByUsageStats = event.getClassName();
Log.d(TAG, "packageNameByUsageStats is" + packageNameByUsageStats + ", classByUsageStats is " + classByUsageStats);
}
}
}
return new String[]{packageNameByUsageStats,classByUsageStats};
}
For some reason, it doesn't go into the while loop, i.e. usageEvents.hasNextEvent() is false. Because of this, it returns null package/class names.
Any idea what I'm doing wrong?
Thanks.
OK, so I found that once I set the interval to 10000 instead of 1000, it works. Apparently a 1s interval is too small.
I am using this myself. I think the usage stats will only be updated when an app comes to foreground. So if the foreground app got to the foreground (and stayed) before your 'begin' timestamp then you will not get it. :(
On the other hand when you use a long time ago you will get a giant list where you only need the highest time to determine the foreground app.
So what I do is I create 3 different times: 1min ago, 1 hour ago and 12 hours ago.
When I get an empty list on 1min I repeat request with 1h and so on. That way I get foreground most of the time. But I never get it to work ALL of the time.
I really miss the old way of just asking the package manager which app is foreground (prior to android 5), the new way is a bit messy.
I am building an app to help you keep track of tv-shows.
When i first add my "widget" to dashclock the notification appear if there is any, but after a while they disappear again.
The code for my activity extending DashClockExtension
#Override
protected void onUpdateData(int reason) {
DatabaseHandler databaseHandler = new DatabaseHandler(this);
ArrayList<Episode> episodes = databaseHandler.GetTodaysEpisodes();
DateHelper dateHelper = new DateHelper();
String numberOfEpisodes = "" +episodes.size();
StringBuilder sb = new StringBuilder();
for (Episode episode : episodes) {
sb.append(dateHelper.Episodenumber(episode) + " " + episode.getTitle() + "\n");
}
publishUpdate(new ExtensionData()
.visible(true)
.icon(R.drawable.ic_icon_dashclock)
.visible(!numberOfEpisodes.equals("0"))
.status(numberOfEpisodes)
.expandedTitle(numberOfEpisodes + " episodes airing today")
.expandedBody(sb.toString())
.clickIntent(new Intent("se.ja1984.twee.CalendarActivity_LAUNCH_IT"))
);
}
Since my data isn´t updated that often I´m satisfied with letting DashClock check for updates.
I´m new to android development and are probably doing something wrong :) And I would really appreciate someone pointing me in the right direction!
Okey so I solved it!
When my app starts I set and static integer with the chosen profile which i then use when fetching data from the database. So when my app is killed by the system it tries to fetch data for profile 0 (which never exists).
Thank you Robby and Roman for the help and time invested in this! :)
You are setting visible=false when numberOfEpisodes is "0". That's most likely what is happening. You can debug the extension like you would debug any other app. Just run it in debug, and then attach to your app through ddms.
I want to display all my records that are stored in the database
c = db.DBhelper.getChamp1(c.getCount);
//startManagingCursor(c);
int j = 0;
stateNameArray = new String[c.getCount()];
c.moveToFirst();
while(!c.isAfterLast()) {
stateNameArray[j] = c.getString(0);
j++;
Log.i("DEBUG_SQL","" + c.getString(0)+ " "+c.getString(j));
c.moveToNext();
}
//String resultat = ;
Log.i("DEBUG_SQL","" + c.getColumnIndex("article"));
I get an error when I write c.getCount – why? When I write a number like 1 or 2 or 3... that works.
And if I write
c = db.rawQuery("SELECT * FROM loan", null);
I get an error, but if I write
db.rawQuery("SELECT * FROM loan WHERE _id=1", null);
That works. Why?
At the very least, I see a problem with this log statement, where c.getString(j) doesn't make sense. And it may trigger an error as j gets larger.
Log.i("DEBUG_SQL","" + c.getString(0)+ " "+c.getString(j));
What data did you intend to access with the statement c.getString(j)?
On the getCount error. I assumed the error in the following was a typo. But is this where the error associated with getCount was located?
c = db.DBhelper.getChamp1(c.getCount);
But I shouldn't assume - you never know. It should read (add brackets to the method call).
c = db.DBhelper.getChamp1(c.getCount());
And as #Barak mentioned, what is going on with this statement?
To answer the question about your getCount isuue, you get the error because of this:
c = db.DBhelper.getChamp1(c.getCount);
You're trying to get the count of the cursor before you have it (and you're missing ()).
This would work since you have a cursor to count before you pull the next one:
c = db.getSomeCursor;
c1 = db.DBhelper.getChamp1(c.getCount());
Let us know what you're trying to achieve (I can't figure it out from the code you posted) and maybe we can be more helpful.
I'm developing an application where I need to insert lots of Contact entries. At the current time approx 600 contacts with a total of 6000 phone numbers. The biggest contact has 1800 phone numbers.
Status as of today is that I have created a custom Account to hold the Contacts, so the user can select to see the contact in the Contacts view.
But the insertion of the contacts is painfully slow. I insert the contacts using ContentResolver.applyBatch. I've tried with different sizes of the ContentProviderOperation list(100, 200, 400), but the total running time is approx. the same. To insert all the contacts and numbers takes about 30 minutes!
Most issues I've found regarding slow insertion in SQlite brings up transactions. But since I use the ContentResolver.applyBatch-method I don't control this, and I would assume that the ContentResolver takes care of transaction management for me.
So, to my question: Am I doing something wrong, or is there anything I can do to speed this up?
Anders
Edit:
#jcwenger:
Oh, I see. Good explanation!
So then I will have to first insert into the raw_contacts table, and then the datatable with the name and numbers. What I'll lose is the back reference to the raw_id which I use in the applyBatch.
So I'll have to get all the id's of the newly inserted raw_contacts rows to use as foreign keys in the data table?
Use ContentResolver.bulkInsert (Uri url, ContentValues[] values) instead of ApplyBatch()
ApplyBatch (1) uses transactions and (2) it locks the ContentProvider once for the whole batch instead locking/unlocking once per operation. because of this, it is slightly faster than doing them one at a time (non-batched).
However, since each Operation in the Batch can have a different URI and so on, there's a huge amount of overhead. "Oh, a new operation! I wonder what table it goes in... Here, I'll insert a single row... Oh, a new operation! I wonder what table it goes in..." ad infinitium. Since most of the work of turning URIs into tables involves lots of string comparisons, it's obviously very slow.
By contrast, bulkInsert applies a whole pile of values to the same table. It goes, "Bulk insert... find the table, okay, insert! insert! insert! insert! insert!" Much faster.
It will, of course, require your ContentResolver to implement bulkInsert efficiently. Most do, unless you wrote it yourself, in which case it will take a bit of coding.
bulkInsert: For those interested, here is the code that I was able to experiment with. Pay attention to how we can avoid some allocations for int/long/floats :) this could save more time.
private int doBulkInsertOptimised(Uri uri, ContentValues values[]) {
long startTime = System.currentTimeMillis();
long endTime = 0;
//TimingInfo timingInfo = new TimingInfo(startTime);
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
DatabaseUtils.InsertHelper inserter =
new DatabaseUtils.InsertHelper(db, Tables.GUYS);
// Get the numeric indexes for each of the columns that we're updating
final int guiStrColumn = inserter.getColumnIndex(Guys.STRINGCOLUMNTYPE);
final int guyDoubleColumn = inserter.getColumnIndex(Guys.DOUBLECOLUMNTYPE);
//...
final int guyIntColumn = inserter.getColumnIndex(Guys.INTEGERCOLUMUNTYPE);
db.beginTransaction();
int numInserted = 0;
try {
int len = values.length;
for (int i = 0; i < len; i++) {
inserter.prepareForInsert();
String guyID = (String)(values[i].get(Guys.GUY_ID));
inserter.bind(guiStrColumn, guyID);
// convert to double ourselves to save an allocation.
double d = ((Number)(values[i].get(Guys.DOUBLECOLUMNTYPE))).doubleValue();
inserter.bind(guyDoubleColumn, lat);
// getting the raw Object and converting it int ourselves saves
// an allocation (the alternative is ContentValues.getAsInt, which
// returns a Integer object)
int status = ((Number) values[i].get(Guys.INTEGERCOLUMUNTYPE)).intValue();
inserter.bind(guyIntColumn, status);
inserter.execute();
}
numInserted = len;
db.setTransactionSuccessful();
} finally {
db.endTransaction();
inserter.close();
endTime = System.currentTimeMillis();
if (LOGV) {
long timeTaken = (endTime - startTime);
Log.v(TAG, "Time taken to insert " + values.length + " records was " + timeTaken +
" milliseconds " + " or " + (timeTaken/1000) + "seconds");
}
}
getContext().getContentResolver().notifyChange(uri, null);
return numInserted;
}
An example of on how to override the bulkInsert(), in order to speed up multiples insert, can be found here
#jcwenger At first, after read your post, I think that's the reason of
bulkInsert is quicker than ApplyBatch, but after read the code of Contact Provider, I don't think so.
1.You said ApplyBatch use transactions, yes, but bulkInsert also use transactions. Here is the code of it:
public int bulkInsert(Uri uri, ContentValues[] values) {
int numValues = values.length;
mDb = mOpenHelper.getWritableDatabase();
mDb.beginTransactionWithListener(this);
try {
for (int i = 0; i < numValues; i++) {
Uri result = insertInTransaction(uri, values[i]);
if (result != null) {
mNotifyChange = true;
}
mDb.yieldIfContendedSafely();
}
mDb.setTransactionSuccessful();
} finally {
mDb.endTransaction();
}
onEndTransaction();
return numValues;
}
That is to say, bulkInsert also use transations.So I don't think that's the reason.
2.You said bulkInsert applies a whole pile of values to the same table.I'm sorry I can't find related code in the source code of froyo.And I want to know how could you find that?Could you tell me?
The reason I think is that:
bulkInsert use mDb.yieldIfContendedSafely() while applyBatch use
mDb.yieldIfContendedSafely(SLEEP_AFTER_YIELD_DELAY)/*SLEEP_AFTER_YIELD_DELAY = 4000*/
after reading the code of SQLiteDatabase.java, I find that, if set a time in yieldIfContendedSafely, it will do a sleep, but if you don't set the time, it will not sleep.You can refer to the code below which is a piece of code of SQLiteDatabase.java
private boolean yieldIfContendedHelper(boolean checkFullyYielded, long sleepAfterYieldDelay) {
if (mLock.getQueueLength() == 0) {
// Reset the lock acquire time since we know that the thread was willing to yield
// the lock at this time.
mLockAcquiredWallTime = SystemClock.elapsedRealtime();
mLockAcquiredThreadTime = Debug.threadCpuTimeNanos();
return false;
}
setTransactionSuccessful();
SQLiteTransactionListener transactionListener = mTransactionListener;
endTransaction();
if (checkFullyYielded) {
if (this.isDbLockedByCurrentThread()) {
throw new IllegalStateException(
"Db locked more than once. yielfIfContended cannot yield");
}
}
if (sleepAfterYieldDelay > 0) {
// Sleep for up to sleepAfterYieldDelay milliseconds, waking up periodically to
// check if anyone is using the database. If the database is not contended,
// retake the lock and return.
long remainingDelay = sleepAfterYieldDelay;
while (remainingDelay > 0) {
try {
Thread.sleep(remainingDelay < SLEEP_AFTER_YIELD_QUANTUM ?
remainingDelay : SLEEP_AFTER_YIELD_QUANTUM);
} catch (InterruptedException e) {
Thread.interrupted();
}
remainingDelay -= SLEEP_AFTER_YIELD_QUANTUM;
if (mLock.getQueueLength() == 0) {
break;
}
}
}
beginTransactionWithListener(transactionListener);
return true;
}
I think that's the reason of bulkInsert is quicker than applyBatch.
Any question please contact me.
I get the basic solution for you,
use "yield points" in batch operation.
The flip side of using batched operations is that a large batch may lock up the database for a long time preventing other applications from accessing data and potentially causing ANRs ("Application Not Responding" dialogs.)
To avoid such lockups of the database, make sure to insert "yield points" in the batch. A yield point indicates to the content provider that before executing the next operation it can commit the changes that have already been made, yield to other requests, open another transaction and continue processing operations.
A yield point will not automatically commit the transaction, but only if there is another request waiting on the database. Normally a sync adapter should insert a yield point at the beginning of each raw contact operation sequence in the batch. See withYieldAllowed(boolean).
I hope it's may be useful for you.
Here is am example of inserting same data amount within 30 seconds.
public void testBatchInsertion() throws RemoteException, OperationApplicationException {
final SimpleDateFormat FORMATTER = new SimpleDateFormat("mm:ss.SSS");
long startTime = System.currentTimeMillis();
Log.d("BatchInsertionTest", "Starting batch insertion on: " + new Date(startTime));
final int MAX_OPERATIONS_FOR_INSERTION = 200;
ArrayList<ContentProviderOperation> ops = new ArrayList<>();
for(int i = 0; i < 600; i++){
generateSampleProviderOperation(ops);
if(ops.size() >= MAX_OPERATIONS_FOR_INSERTION){
getContext().getContentResolver().applyBatch(ContactsContract.AUTHORITY,ops);
ops.clear();
}
}
if(ops.size() > 0)
getContext().getContentResolver().applyBatch(ContactsContract.AUTHORITY,ops);
Log.d("BatchInsertionTest", "End of batch insertion, elapsed: " + FORMATTER.format(new Date(System.currentTimeMillis() - startTime)));
}
private void generateSampleProviderOperation(ArrayList<ContentProviderOperation> ops){
int backReference = ops.size();
ops.add(ContentProviderOperation.newInsert(ContactsContract.RawContacts.CONTENT_URI)
.withValue(ContactsContract.RawContacts.ACCOUNT_NAME, null)
.withValue(ContactsContract.RawContacts.ACCOUNT_TYPE, null)
.withValue(ContactsContract.RawContacts.AGGREGATION_MODE, ContactsContract.RawContacts.AGGREGATION_MODE_DISABLED)
.build()
);
ops.add(ContentProviderOperation.newInsert(ContactsContract.Data.CONTENT_URI)
.withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, backReference)
.withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE)
.withValue(ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME, "GIVEN_NAME " + (backReference + 1))
.withValue(ContactsContract.CommonDataKinds.StructuredName.FAMILY_NAME, "FAMILY_NAME")
.build()
);
for(int i = 0; i < 10; i++)
ops.add(ContentProviderOperation.newInsert(ContactsContract.Data.CONTENT_URI)
.withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, backReference)
.withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE)
.withValue(ContactsContract.CommonDataKinds.Phone.TYPE, ContactsContract.CommonDataKinds.Phone.TYPE_MAIN)
.withValue(ContactsContract.CommonDataKinds.Phone.NUMBER, Integer.toString((backReference + 1) * 10 + i))
.build()
);
}
The log:
02-17 12:48:45.496 2073-2090/com.vayosoft.mlab D/BatchInsertionTest﹕ Starting batch insertion on: Wed Feb 17 12:48:45 GMT+02:00 2016
02-17 12:49:16.446 2073-2090/com.vayosoft.mlab D/BatchInsertionTest﹕ End of batch insertion, elapsed: 00:30.951
Just for the information of the readers of this thread.
I was facing performance issue even if using applyBatch().
In my case there was database triggers written on one of the table.
I deleted the triggers of the table and its boom.
Now my app insert rows with blessing fast speed.