SSH SSH - 3 months ago 18
Android Question

SQLiteAssetHelper:Couldn't open database for writing (will try read-only)

This question has already been asked by the people but going through the steps from many of them I am still unable to fix the problem at my end, My app is working fine on emulator but not on the real device and gives the following 2 exceptions, the first exception is the major source of second exception and i guess there is some permission issue. I have added the

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


to the manifest file but i got the same result. My database is very simple with one table. ALso i have added "android_metadata" table and edit my other table's id field to "_id". and I am sure my database is present in the assets folder.

Any help would be appreciated.

first exception

02-24 12:58:10.067: E/SQLiteAssetHelper(7107): Couldn't open Shajra for writing (will try read-only):
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): com.readystatesoftware.sqliteasset.SQLiteAssetHelper$SQLiteAssetException: Missing databases/Shajra file (or .zip, .gz archive) in assets, or target folder not writable
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.content.res.AssetManager.openAsset(Native Method)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.content.res.AssetManager.open(AssetManager.java:325)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.content.res.AssetManager.open(AssetManager.java:299)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.copyDatabaseFromAssets(SQLiteAssetHelper.java:436)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.createOrOpenDatabase(SQLiteAssetHelper.java:400)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getWritableDatabase(SQLiteAssetHelper.java:176)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getReadableDatabase(SQLiteAssetHelper.java:254)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at com.nannandotcom.MainActivity.onCreate(MainActivity.java:27)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1072)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1836)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1893)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.app.ActivityThread.access$1500(ActivityThread.java:135)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1054)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.os.Handler.dispatchMessage(Handler.java:99)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.os.Looper.loop(Looper.java:150)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at android.app.ActivityThread.main(ActivityThread.java:4389)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at java.lang.reflect.Method.invokeNative(Native Method)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at java.lang.reflect.Method.invoke(Method.java:507)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
02-24 12:58:10.067: E/SQLiteAssetHelper(7107): at dalvik.system.NativeStart.main(Native Method)


second exception

02-24 12:58:10.077: E/Database(7107): dbopen(): sqlite3_open_v2("/data/data/com.example.nannandotcom/databases/Shajra", &handle, 1, NULL) failed
02-24 12:58:10.077: E/Database(7107): dbopen(): errno = 2, error message = No such file or directory
02-24 12:58:10.077: D/AndroidRuntime(7107): Shutting down VM
02-24 12:58:10.077: W/dalvikvm(7107): threadid=1: thread exiting with uncaught exception (group=0x4011f5a0)
02-24 12:58:10.108: E/AndroidRuntime(7107): FATAL EXCEPTION: main
02-24 12:58:10.108: E/AndroidRuntime(7107): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.nannandotcom/com.nannandotcom.MainActivity}: android.database.sqlite.SQLiteException: unable to open database file
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1872)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1893)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.app.ActivityThread.access$1500(ActivityThread.java:135)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1054)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.os.Handler.dispatchMessage(Handler.java:99)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.os.Looper.loop(Looper.java:150)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.app.ActivityThread.main(ActivityThread.java:4389)
02-24 12:58:10.108: E/AndroidRuntime(7107): at java.lang.reflect.Method.invokeNative(Native Method)
02-24 12:58:10.108: E/AndroidRuntime(7107): at java.lang.reflect.Method.invoke(Method.java:507)
02-24 12:58:10.108: E/AndroidRuntime(7107): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
02-24 12:58:10.108: E/AndroidRuntime(7107): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
02-24 12:58:10.108: E/AndroidRuntime(7107): at dalvik.system.NativeStart.main(Native Method)
02-24 12:58:10.108: E/AndroidRuntime(7107): Caused by: android.database.sqlite.SQLiteException: unable to open database file
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.database.sqlite.SQLiteDatabase.dbopen(Native Method)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1962)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:906)
02-24 12:58:10.108: E/AndroidRuntime(7107): at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getReadableDatabase(SQLiteAssetHelper.java:264)
02-24 12:58:10.108: E/AndroidRuntime(7107): at com.nannandotcom.MainActivity.onCreate(MainActivity.java:27)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1072)
02-24 12:58:10.108: E/AndroidRuntime(7107): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1836)
02-24 12:58:10.108: E/AndroidRuntime(7107): ... 11 more


DatabaseHelper

package com.nannandotcom;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.nannandotcom.model.ProfileBean;
import com.readystatesoftware.sqliteasset.SQLiteAssetHelper;

public class DatabaseHelper extends SQLiteAssetHelper {

private static final String DATABASE_NAME = "Shajra";
private static final int DATABASE_VERSION = 1;

private Context context;

public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
this.context = context;
}

public void copyDatabase() throws IOException{
// SQLiteDatabase checkDB = SQLiteDatabase.openDatabase(context.getAssets().+(DATABASE_NAME), null, SQLiteDatabase.OPEN_READONLY);
// checkDB.close();
InputStream myInput = context.getAssets().open(DATABASE_NAME);
String outFileName = "/data/data/"+ context.getPackageName() + "/databases/" + DATABASE_NAME;
OutputStream myOutput = new FileOutputStream(outFileName);

byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}

myOutput.flush();
myOutput.close();
myInput.close();
}

public ProfileBean getProfileBean(SQLiteDatabase database,int id){
ProfileBean profileBean = new ProfileBean();
try {
Cursor c = database.query("Profiles",
new String[]{"_id","Name","Qualification","WorkingAt","LivesAt","MaritalStatus","NumberOfChildren",
"Telephone","Email","Picture","MarriedTo","Father","Mother","DOB","Gender"},
"_id=?",
new String[]{Integer.toString(id)},null, null, null);
if (c != null ) {
if (c.moveToFirst()) {
do {

}while (c.moveToNext());
}
}
}
catch(Exception e){
e.printStackTrace();
}
return profileBean;
}
}


MainActivity

package com.nannandotcom;

import java.io.IOException;
import com.example.nannandotcom.R;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DatabaseHelper databaseHelper = new DatabaseHelper(this);
SQLiteDatabase database = databaseHelper.getReadableDatabase();

try {
databaseHelper.copyDatabase();
}
}catch(SQLException sqle){

throw sqle;

}
}
catch(Exception e){
Log.e("MainActivity", e.getMessage());
e.printStackTrace();
}

final EditText enterName = (EditText) findViewById(R.id.editText1);
Button submit = (Button) findViewById(R.id.button1);
submit.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
Intent mainActivityIntent = new Intent(MainActivity.this, Welcome.class);
mainActivityIntent.putExtra("userName", enterName.getText().toString());
startActivity(mainActivityIntent);
}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

Answer

i think you are missing db extension in DATABASE_NAME.

So give specific DATABASE_NAME with extension as per assets directory.

Replace

private static final String DATABASE_NAME = "Shajra"; 

With

private static final String DATABASE_NAME = "Shajra.db"; 

Or

private static final String DATABASE_NAME = "Shajra.sqlite"; 
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