sqlite bulk insertion from text file in assets

Question

I am facing a problem in case while I am having a bulk of insert queries in my text file (stored in assets), I do want to execute all those queries while installation of app after creation of tables.

I am unable to understand how to do this.

I have the following code, that executes only the first one of all queries.

      @Override
      public void onCreate(SQLiteDatabase db) {

     //create table queries

     // inserting from the text file in assets

   InputStream in_s = cntx.getAssets().open("VistaLog.txt");
   byte[] b = new byte[in_s.available()];
   in_s.read(b);
   String sql = new String(b);
   db.execSQL(sql);

  }

But, I do need to execute all queries one by one.

Update

Using this code

StringBuilder sb = new StringBuilder();

try {
            InputStream is = ctx.getAssets().open("VistaLog2.txt");
            Reader reader = new InputStreamReader(is);
            char[] chars = new char[8192];
            for(int len; (len = reader.read(chars)) > 0;) {
                // process chars.
                sb.append((char)len);
            }
            reader.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            Log.e("chunkfile", "error here: "+e.getMessage());
        }    


   String[] queries = sb.toString().split(";");
    for(String query : queries){

        Log.d("vista_database", "query: "+query);
           db.execSQL(query);
        }

Gives me the following error.

  08-07 16:33:06.187: E/Database(8115): Failure 1 (near    
  "                                                                                        
    ᆱ": syntax error) on 0x2a2ba8 when preparing 
  '                                                                                     
 ᆱ'.

  08-07 16:33:06.217: E/vista_database(8115): android.database.sqlite.SQLiteException: 
  near "                                                                                     ᆱ":  
  syntax error:                                                                                      ᆱ

 08-07 16:33:06.217: E/vista_database(8115):    at  
 android.database.sqlite.SQLiteDatabase.native_execSQL(Native Method)

 08-07 16:33:06.217: E/vista_database(8115):    at 
 android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1836)
08-07 16:33:06.217: E/vista_database(8115):     at com.Vista.Helper.DataHelper$OpenHelper.onCreate(DataHelper.java:1140)
08-07 16:33:06.217: E/vista_database(8115):     at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:106)
08-07 16:33:06.217: E/vista_database(8115):     at com.Vista.Helper.DataHelper.<init>(DataHelper.java:105)
08-07 16:33:06.217: E/vista_database(8115):     at com.bus_service.Vista_bus_service.onCreate(Vista_bus_service.java:64)
08-07 16:33:06.217: E/vista_database(8115):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-07 16:33:06.217: E/vista_database(8115):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2628)
08-07 16:33:06.217: E/vista_database(8115):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2680)
08-07 16:33:06.217: E/vista_database(8115):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-07 16:33:06.217: E/vista_database(8115):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-07 16:33:06.217: E/vista_database(8115):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-07 16:33:06.217: E/vista_database(8115):     at android.os.Looper.loop(Looper.java:123)
08-07 16:33:06.217: E/vista_database(8115):     at android.app.ActivityThread.main(ActivityThread.java:4628)
08-07 16:33:06.217: E/vista_database(8115):     at java.lang.reflect.Method.invokeNative(Native Method)
08-07 16:33:06.217: E/vista_database(8115):     at java.lang.reflect.Method.invoke(Method.java:521)
08-07 16:33:06.217: E/vista_database(8115):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:879)
08-07 16:33:06.217: E/vista_database(8115):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:637)
08-07 16:33:06.217: E/vista_database(8115):     at dalvik.system.NativeStart.main(Native Method)

Please let me know how to do that.

Answer 1

Its not possible with SQlitedatabse methods in android for this you have to repeat the loop

may be this will helpful for you.

batch operations

try to read the text from the file like this it will give correct data

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    StringBuffer sb = new StringBuffer();
    InputStream inputStream = null;

    int i;
    try {
        inputStream = getApplicationContext().getAssets()
                .open("readme.txt");
        i = inputStream.read();
        while (i != -1) {
            byteArrayOutputStream.write(i);
            i = inputStream.read();
        }
        inputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

    System.out.println(byteArrayOutputStream.toString());