Database open from external storage SD card

Question

Continuously struggling to create the db in device Due to run-as permission issue i am unable to create the DB file in Samsung device while i run my application. So i am trying to open the db file from SD card which is already available with data.Can anyone provide the suggestion on the same.My database code is given below.

 package com.bar.example.androidspinnerexample; import java.util.ArrayList; import java.util.List; import java.io.File; import android.os.Environment; import android.os.StatFs; import android.util.Log; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; public class DatabaseHandler extends SQLiteOpenHelper { // Database Version public static final int DATABASE_VERSION = 1; // Database Name public static final String DATABASE_NAME = "spinnerExample"; private static String DB_PATH = "/sdcard/android/com.bar.example.androidspinnerexample/databases/spinnerExample.db"; // Labels table name public static final String TABLE_LABELS = "labels"; //<<<< Made public public static final String TABLE_LABELS1= "labels1"; public static final String TABLE_LABELS2= "labels2"; // Labels Table Columns names public static final String KEY_ID4 = "input_label"; public static final String KEY_ID = "id"; //<<<< Made public public static final String KEY_NAME = "name"; //<<<< made public public static final String KEY_ID1 = "id1"; //<<<< Made public public static final String KEY_NAME1 = "name1"; public static final String KEY_1 = "number"; //<<<< Made public public static final String KEY_2 = "outletname"; //<<<< made public public static final String KEY_3 = "sunday"; //<<<< Made public public static final String KEY_4 = "monday"; public static final String KEY_5 = "tuesday"; public static final String KEY_6 = "wednesday"; public static final String KEY_7 = "thursday"; public static final String KEY_8 = "saturday"; public static final String KEY_9 = "closed"; public static final String KEY_10 = "calling"; public DatabaseHandler(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } // Creating Tables @Override public void onCreate(SQLiteDatabase db) { // Category table create query String CREATE_CATEGORIES_TABLE = "CREATE TABLE " + TABLE_LABELS + "(" + KEY_ID + " TEXT," + KEY_NAME + " TEXT)"; String CREATE_CATEGORIES_TABLE1 = "CREATE TABLE " + TABLE_LABELS1 + "(" + KEY_ID1+ " TEXT," + KEY_NAME1+ " TEXT)"; db.execSQL(CREATE_CATEGORIES_TABLE); db.execSQL(CREATE_CATEGORIES_TABLE1); } // Upgrading database @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { // Drop older table if existed db.execSQL("DROP TABLE IF EXISTS " + TABLE_LABELS); db.execSQL("DROP TABLE IF EXISTS " + TABLE_LABELS1); // Create tables again onCreate(db); } // Added for adding new data public void insertlabel(String id, String label) { SQLiteDatabase db = this.getWritableDatabase(); ContentValues cv = new ContentValues(); cv.put(KEY_ID,id); cv.put(KEY_NAME,label); db.insert(TABLE_LABELS,null,cv); db.close(); } /** * Inserting new lable into lables table * */ public void insertLabel(String message1, String message2,String message3,String message4,String message5,String message6,String message7,String message8,String message9,String message10){ SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(KEY_1, message1); values.put(KEY_2, message2); values.put(KEY_10,message10); values.put(KEY_3,message3); values.put(KEY_4,message4); values.put(KEY_5,message5); values.put(KEY_6,message6); values.put(KEY_7,message7); values.put(KEY_9,message9); values.put(KEY_8,message8); // Inserting Row db.insert(TABLE_LABELS2, null, values); db.close(); // Closing database connection } public void insertLabel1(String label){ SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(KEY_NAME1, label); // Inserting Row db.insert(TABLE_LABELS1, null, values); db.close(); // Closing database connection } public void insertLabel2(String label){ SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(KEY_NAME1, label); values.put(KEY_10, label); values.put(KEY_ID, label); db.insert(TABLE_LABELS2, null, values); db.close(); // Closing database connection } public List<String> getAllLabels(){ List<String> labels = new ArrayList<String>(); // Select All Query String selectQuery = "SELECT * FROM " + TABLE_LABELS1; SQLiteDatabase db = this.getReadableDatabase(); Cursor cursor = db.rawQuery(selectQuery, null); // looping through all rows and adding to list if (cursor.moveToFirst()) { do { labels.add(cursor.getString(1)); } while (cursor.moveToNext()); } // closing connection cursor.close(); db.close(); // returning lables return labels; } public List<String> getAllLabels1(){ List<String> labels = new ArrayList<String>(); // Select All Query String selectQuery = "SELECT count (*) FROM " + TABLE_LABELS; SQLiteDatabase db = this.getReadableDatabase(); Cursor cursor1 = db.rawQuery(selectQuery, null); final ArrayList<String> row1 = new ArrayList<String>(); // looping through all rows and adding to list if (cursor1.moveToFirst()) { do { labels.add(cursor1.getString(1)); } while (cursor1.moveToNext()); } // closing connection cursor1.close(); db.close(); // returning lables return labels; } // Added to get Cursor for Simple CursorAdapter public Cursor getAllLabelsAsCursor() { String[] columns = new String[]{"rowid AS _id, *"}; // Need _id column for SimpleCursorAdapter return this.getWritableDatabase().query(TABLE_LABELS,columns,null,null,null,null,null); } public Cursor getAllLabelsExceptedSelected(long selected) { String[] columns = new String[]{"rowid AS _id, *"}; String whereclause = "rowid <> ?"; String[] whereargs = new String[]{String.valueOf(selected)}; return this.getWritableDatabase().query(TABLE_LABELS, columns, whereclause, whereargs, null, null, null ); } public Cursor getByRowid(long id) { String[] columns = new String[]{"rowid AS _id, *"}; return this.getWritableDatabase().query( TABLE_LABELS, columns, "rowid=?", new String[]{String.valueOf(id)}, null,null,null ); } }

Answer 1

use this code to export your DB to internal storage

private void exportDatabase(){
    File data = Environment.getDataDirectory();
    FileChannel source=null;
    FileChannel destination=null;
    String currentDBPath = "/data/"+ "your_package_name" +"/databases/your_db_name.db";
    String backupDBPath = "/sdcard/your_db_name.db";
    File currentDB = new File(data, currentDBPath);
    File backupDB = new File(backupDBPath);
    try {
        source = new FileInputStream(currentDB).getChannel();
        destination = new FileOutputStream(backupDB).getChannel();
        destination.transferFrom(source, 0, source.size());
        source.close();
        destination.close();
        Toast.makeText(this, "DB Exported!", Toast.LENGTH_LONG).show();
    } catch(IOException e) {
        e.printStackTrace();
    }
}

and add permissions in manifest

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />