Read database content under android

I will create another project on Android in the last few days. I need to read the SQLite database file into the program, and the result is more than N days... I am not strong enough... Later, I found an example on the Internet to read the. DB file into the SD card and then read it from the SD card.

Package COM. easymorse; import Java. io. file; import Java. io. fileoutputstream; import Java. io. inputstream; import android. app. activity; import android. app. alertdialog; import android. database. cursor; import android. database. SQLite. sqlitedatabase; import android. OS. bundle; import android. text. editable; import android. text. textwatcher; import android. util. log; import android. view. view; import android. vie W. view. onclicklistener; import android. widget. autocompletetextview; import android. widget. button; public class dictionary extends activity implements onclicklistener, textwatcher {private final string database_path = android. OS. environment. getexternalstoragedirectory (). getabsolutepath () + "/Dictionary"; private final string database_filename = "dictionary. db3 "; sqlitedatabase database; button btnse Lectword; autocompletetextview actvword; @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. main); // open the database. database is a variable of the sqlitedatabase type defined in the main class. Database = opendatabase (); // the following code loads the relevant components, the corresponding event btnselectword = (button) findviewbyid (R. id. btnselectword); actvword = (autocompletetextview) findviewbyid (R. id. actvword); btnsele Ctword. setonclicklistener (this); actvword. addtextchangedlistener (this);} public void onclick (view) {// SQL statement for searching words string SQL = "select Chinese from t_words where English =? "; Cursor = database. rawquery (SQL, new string [] {actvword. gettext (). tostring ()}); string result = "this word is not found. "; // if you are searching for a word, display its Chinese information if (cursor. getcount ()> 0) {// you must use the movetofirst method to move the record pointer to the position of the first 1st records, cursor. movetofirst (); Result = cursor. getstring (cursor. getcolumnindex ("Chinese"); log. I ("Tran", "success" + result);} // display the query result dialog box new alertdialog. builder (this ). settitle ("query result "). setmessage (result ). s Etpositivebutton ("off", null ). show ();} private sqlitedatabase opendatabase () {try {// get dictionary. absolute path of the DB file string databasefilename = database_path + "/" + database_filename; file dir = new file (database_path); // If the/sdcard/dictionary directory exists, create this directory if (! Dir. exists () dir. mkdir (); // If the/sdcard/dictionary directory does not exist // dictionary. DB file, copy the file from the res \ raw directory to the // SD card directory (/sdcard/dictionary) if (! (New file (databasefilename )). exists () {// obtain the encapsulated dictionary. inputstream object of the DB file inputstream is = getresources (). openrawresource (R. raw. dictionary); fileoutputstream Fos = new fileoutputstream (databasefilename); byte [] buffer = new byte [8192]; int COUNT = 0; // start to copy dictionary. DB file while (COUNT = is. read (buffer)> 0) {FOS. write (buffer, 0, count);} FOS. close (); is. close ();} // open the dictionary in the/sdcard/dictionary directory. DB file sqlitedatabase database = sqlitedatabase. openorcreatedatabase (databasefilename, null); Return database;} catch (exception e) {} return NULL;} the initial experience of the JMS server activemq and @ override public void aftertextchanged (editable S) {}@ override public void beforetextchanged (charsequence S, int start, int count, int after) {}@ override public void ontextchanged (charsequence S, int start, int before, int count) {}}

This is an example from the Internet. Then I figured it out.

But next again encountered a garbled problem, checked, is because my project is GBK, And the android database default for UTF-8, so it is enough to convert the binary data to the UTF-8.