Content Providers – używane do wyciągania danych z wew. bazy telefonu, takich jak Kontakty, Dokumenty, Kalendarz lub też do używania bazy z innej aplikacji (jeśli takowa dostarcza ContentProvider)
1) Uprawnienia do łączenia się z wybranym ContentProvider
W pliku manifest.xml
<uses-permission android:name=”com.example.udacity.droidtermsexample.TERMS_READ”></uses-permission>
2) Połączenie z ContentProvider dostajemy przez ContentResolver (wywoływać zawsze w AsynCTask .doInBackground – jako, że jest to zasobożerne i może zwiesić aplikacje)
Cursor cur;
ContentResolver cr = getContentResolver(); Uri uri = Calendars.CONTENT_URI;
cur = cr.query(uri, null, null, null, null);
skąd wziąć dostępne w telefonie URI ?
używając tego kawalka kodu😉
for (PackageInfo pack : getPackageManager().getInstalledPackages(PackageManager.GET_PROVIDERS)) {
ProviderInfo[] providers = pack.providers;
if (providers != null) {
for (ProviderInfo provider : providers) {
Log.d("Example", "provider: " + provider.authority);
}
}
}
Lub używając polecenia adb z konsoli:
C:\Users\username\AppData\Local\Android\Sdk\platform-tools>adb
Android Debug Bridge version 1.0.39
Version 0.0.1-4500957
Installed as C:\Users\magda\AppData\Local\Android\Sdk\platform-tools\adb.exe
global options:
-a listen on all network interfaces, not just localhost
-d use USB device (error if multiple devices connected)
-e use TCP/IP device (error if multiple TCP/IP devices available)
-s SERIAL use device with given serial (overrides $ANDROID_SERIAL)
-t ID use device with given transport id
-H name of adb server host [default=localhost]
-P port of adb server [default=5037]
-L SOCKET listen on given socket for adb server [default=tcp:localhost:5037]
general commands:
devices [-l] list connected devices (-l for long output)
help show this help message
version show version num
networking:
connect HOST[:PORT] connect to a device via TCP/IP [default port=5555]
disconnect [HOST[:PORT]]
disconnect from given TCP/IP device [default port=5555], or all
forward –list list all forward socket connections
forward [–no-rebind] LOCAL REMOTE
forward socket connection using:
tcp:<port> (<local> may be „tcp:0” to pick any open port)
localabstract:<unix domain socket name>
localreserved:<unix domain socket name>
localfilesystem:<unix domain socket name>
dev:<character device name>
jdwp:<process pid> (remote only)
forward –remove LOCAL remove specific forward socket connection
forward –remove-all remove all forward socket connections
ppp TTY [PARAMETER…] run PPP over USB
reverse –list list all reverse socket connections from device
reverse [–no-rebind] REMOTE LOCAL
reverse socket connection using:
tcp:<port> (<remote> may be „tcp:0” to pick any open port)
localabstract:<unix domain socket name>
localreserved:<unix domain socket name>
localfilesystem:<unix domain socket name>
reverse –remove REMOTE remove specific reverse socket connection
reverse –remove-all remove all reverse socket connections from device
file transfer:
push [–sync] LOCAL… REMOTE
copy local files/directories to device
–sync: only push files that are newer on the host than the device
pull [-a] REMOTE… LOCAL
copy files/dirs from device
-a: preserve file timestamp and mode
sync [system|vendor|oem|data|all]
sync a local build from $ANDROID_PRODUCT_OUT to the device (default all)
-l: list but don’t copy
shell:
shell [-e ESCAPE] [-n] [-Tt] [-x] [COMMAND…]
run remote shell command (interactive shell if no command given)
-e: choose escape character, or „none”; default '~’
-n: don’t read from stdin
-T: disable PTY allocation
-t: force PTY allocation
-x: disable remote exit codes and stdout/stderr separation
emu COMMAND run emulator console command
app installation:
install [-lrtsdg] PACKAGE
install-multiple [-lrtsdpg] PACKAGE…
push package(s) to the device and install them
-l: forward lock application
-r: replace existing application
-t: allow test packages
-s: install application on sdcard
-d: allow version code downgrade (debuggable packages only)
-p: partial application install (install-multiple only)
-g: grant all runtime permissions
uninstall [-k] PACKAGE
remove this app package from the device
’-k’: keep the data and cache directories
backup/restore:
to show usage run „adb shell bu help”
debugging:
bugreport [PATH]
write bugreport to given PATH [default=bugreport.zip];
if PATH is a directory, the bug report is saved in that directory.
devices that don’t support zipped bug reports output to stdout.
jdwp list pids of processes hosting a JDWP transport
logcat show device log (logcat –help for more)
security:
disable-verity disable dm-verity checking on userdebug builds
enable-verity re-enable dm-verity checking on userdebug builds
keygen FILE
generate adb public/private key; private key stored in FILE,
public key stored in FILE.pub (existing files overwritten)
scripting:
wait-for[-TRANSPORT]-STATE
wait for device to be in the given state
State: device, recovery, sideload, or bootloader
Transport: usb, local, or any [default=any]
get-state print offline | bootloader | device
get-serialno print <serial-number>
get-devpath print <device-path>
remount
remount /system, /vendor, and /oem partitions read-write
reboot [bootloader|recovery|sideload|sideload-auto-reboot]
reboot the device; defaults to booting system image but
supports bootloader and recovery too. sideload reboots
into recovery and automatically starts sideload mode,
sideload-auto-reboot is the same but reboots after sideloading.
sideload OTAPACKAGE sideload the given full OTA package
root restart adbd with root permissions
unroot restart adbd without root permissions
usb restart adb server listening on USB
tcpip PORT restart adb server listening on TCP on PORT
internal debugging:
start-server ensure that there is a server running
kill-server kill the server if it is running
reconnect kick connection from host side to force reconnect
reconnect device kick connection from device side to force reconnect
reconnect offline reset offline/unauthorized devices to force reconnect
environment variables:
$ADB_TRACE
comma-separated list of debug info to log:
all,adb,sockets,packets,rwx,usb,sync,sysdeps,transport,jdwp
$ADB_VENDOR_KEYS colon-separated list of keys (files or directories)
$ANDROID_SERIAL serial number to connect to (see -s)
$ANDROID_LOG_TAGS tags to be used by logcat (see logcat –help)
https://developer.android.com/studio/command-line/adb.html#shellcommands
https://developer.android.com/studio/command-line/dumpsys.html
Wpisujemy :
adb shell dumpsys
i szukamy w sekcji Registered Providers, która wygląda mniej więcej tak:
Registered ContentProviders:
com.mobisystems.office/com.mobisystems.provider.ProviderWrapper:
Provider{3500dfb com.mobisystems.office/com.mobisystems.provider.ProviderWrapper}
com.android.chrome/android.support.v4.content.FileProvider:
Provider{187a9e18 com.android.chrome/android.support.v4.content.FileProvider}
com.sonyericsson.music/.metadata.GracenoteProvider:
Provider{26f0d071 com.sonyericsson.music/.metadata.GracenoteProvider}
com.android.email/.provider.EmailSearchSuggestionProvider:
Provider{1c715e56 com.android.email/.provider.EmailSearchSuggestionProvider}
com.google.android.gms/.fonts.provider.FontsProvider:
Provider{33878ed7 com.google.android.gms/.fonts.provider.FontsProvider}
com.android.chrome/com.google.android.apps.chrome.ChromeBrowserProvider:
Provider{f8783c4 com.android.chrome/com.google.android.apps.chrome.ChromeBrowserProvider}
com.sonyericsson.video/.metadata.provider.MetadataProvider:
Provider{147102ad com.sonyericsson.video/.metadata.provider.MetadataProvider}
com.android.htmlviewer/.FileContentProvider:
Provider{21bd09e2 com.android.htmlviewer/.FileContentProvider}
com.mobisystems.office/com.mobisystems.connect.client.push.MSFirebaseInitProvider:
Provider{3d4c4173 com.mobisystems.office/com.mobisystems.connect.client.push.MSFirebaseInitProvider}
3)operacje na danych z ContentResolver:
a)wybieranie danych
Cursor cur;
ContentResolver cr = getContentResolver(); Uri uri = Calendars.CONTENT_URI;
cur = cr.query(uri, null, null, null, null);
int wordCol = cursor.getColumnIndex(GlossaryContract.COLUMN_WORD);
int definitionCol = cursor.getColumnIndex(GlossaryContract.COLUMN_DEFINITION);
while (cursor.moveToNext()) {
String word = cursor.getString(wordCol);String definition = cursor.getString(definitionCol);Log.v(“Cursor Example”, word + “ - “ + definition);}
cursor.Close();
b) wstawienie danych
ContentRecsolver.insert
mNewValues.put(UserDictionary.Words.APP_ID, "example.user"); mNewValues.put(UserDictionary.Words.LOCALE, "en_US"); mNewValues.put(UserDictionary.Words.WORD, "insert"); mNewValues.put(UserDictionary.Words.FREQUENCY, "100"); mNewUri = getContentResolver().insert( UserDictionary.Word.CONTENT_URI, // the user dictionary content URI mNewValues // the values to insert );
c) aktualizowanie danych
ContentRecsolver.update
mUpdateValues.putNull(UserDictionary.Words.LOCALE); mRowsUpdated = getContentResolver().update( UserDictionary.Words.CONTENT_URI, // the user dictionary content URI mUpdateValues // the columns to update mSelectionClause // the column to select on mSelectionArgs // the value to compare to );
d) kasowanie danych
ContentRecsolver.delete
// Deletes the words that match the selection criteria mRowsDeleted = getContentResolver().delete( UserDictionary.Words.CONTENT_URI, // the user dictionary content URI mSelectionClause // the column to select on mSelectionArgs // the value to compare to );
I was more than happy to discover this page. I
want to to thank you for your time just for this fantastic read!!
I definitely enjoyed every part of it and i also have you bookmarked to see new
things in your site.