A couple of general Java points unrelated to your problem: 1) Don't put your code in any android.* package. Use your own package, using the standard reverse-domain-name convention, e.g. com.example.myfrotz.
A side benefit is that it will make the stack traces much easier for you to scan for your code vs the system's code. 2) The very strong convention in Java is to name classes with an initial capital letter, and to name methods and fields with initial lowercase. It's so strong that it makes it confusing to read your code if you don't follow it. Even if you never have others read your code -- if you follow it, it will make it easier for you to read other people's code, too. On Dec 17, 12:45 am, cuil yahoo <[email protected]> wrote: > Thanks for replying so quickly. > > On Fri, Dec 17, 2010 at 1:59 PM, Kostya Vasilyev <[email protected]> wrote: > > What is the output of logcat under "Caused by:" ? > > I see no "Caused by" in the logcat output, here is the complete > outputhttp://pastebin.com/VMsrK0Db > > > And don't extend your JavaScript callback from "test". > > > Activities represent "UI screens" and are managed by Android. Defining and > > instantiating one yourself, bypassing the framework, is a recipe for > > disaster. > > > Sorry, i am new to developing for android, what exactly do you mean ? What > > could be a walk around? > > Cuil > > > > > > > > > -- Kostya > > > 17.12.2010 11:14, cuil yahoo пишет: > > > This thing has started to irritate me, > > I have copied the code below, > > > this is test.java, the main class of my program. > > > package android.test; > > > import android.app.Activity; > > import android.content.ContentValues; > > import android.database.sqlite.*; > > import android.os.Bundle; > > import android.util.*; > > import android.webkit.WebView; > > import android.webkit.WebViewClient; > > import seeta.socialcalc.R; > > > class JavaScriptInterface extends test{ > > String saveme; > > public JavaScriptInterface(test test) { > > // TODO Auto-generated constructor stub > > } > > > public void gotit(String s) > > { > > saveme=s; > > final String got="gotit"; > > insertvalues(s); > > Log.d(got, s); > > } > > > private void insertvalues(String s) > > { > > databaseopener dataBasehelper = new databaseopener(this); > > SQLiteDatabase db = dataBasehelper.getWritableDatabase(); > > ContentValues cv = new ContentValues(); > > cv.put(databaseopener.data, "data"); > > db.insert("textdata", databaseopener.data, cv); > > db.close(); > > > } > > > } > > > public class test extends Activity { > > /** Called when the activity is first created. */ > > @Override > > public void onCreate(Bundle savedInstanceState) { > > super.onCreate(savedInstanceState); > > setContentView(R.layout.main); > > > Log.d("test" , "got till here1"); > > WebView web = (WebView) findViewById(R.id.webView); > > web.getSettings().setJavaScriptEnabled(true); > > web.getSettings().setJavaScriptCanOpenWindowsAutomatically(false); > > web.getSettings().setPluginsEnabled(false); > > web.getSettings().setSupportMultipleWindows(false); > > web.getSettings().setSupportZoom(false); > > web.setVerticalScrollBarEnabled(false); > > web.setHorizontalScrollBarEnabled(false); > > web.addJavascriptInterface(new JavaScriptInterface(this), > > "Android"); > > > //Our application's main page will be loaded > > web.loadUrl("file:///android_asset/index.html"); > > > web.setWebViewClient(new WebViewClient() { > > @Override public boolean shouldOverrideUrlLoading(WebView view, > > String url) { > > return false; > > } > > }); > > } > > } > > > The next class helps implement databases, > > > package android.test; > > > import android.content.Context; > > import android.database.sqlite.SQLiteDatabase; > > import android.database.sqlite.SQLiteDatabase.CursorFactory; > > import android.database.sqlite.SQLiteOpenHelper; > > import android.database.SQLException; > > > public class databaseopener extends SQLiteOpenHelper > > { > > > private static final String database_name = "mydatabase.db"; > > static String data = "Data"; > > > public databaseopener(Context context) > > { > > super(context, database_name, null, 1); > > // TODO Auto-generated constructor stub > > > } > > @Override > > public void onCreate(SQLiteDatabase db) { > > > android.util.Log.d("database", "database about to be created"); > > db.execSQL( "CREATE TABLE textdata (_id INTEGER PRIMARY KEY > > AUTOINCREMENT, data TEXT);"); > > // TODO Auto-generated method stub > > > } > > > @Override > > public void onUpgrade(SQLiteDatabase db, int oldVersion, int > > newVersion) { > > > // i don't want to upgrade right now, first want the database to be > > created. > > // TODO Auto-generated method stub > > > } > > > } > > > Any Pointers on errors would be appreciated. > > > Cuil > > > On Fri, Dec 17, 2010 at 1:34 PM, Kostya Vasilyev <[email protected]>wrote: > > >> It looks like a problem in your JavaScriptInterface.insertValues. > > >> There should be more in the logcat below what you posted, starting with > >> "Caused by:". > > >> -- Kostya > > >> 17.12.2010 10:31, cuil yahoo пишет: > > >> I went through some online material both blogs and videos, and managed > >> to rectify the code. However, now i get a NullPointerException, > > >> 12-17 12:48:44.184: INFO/dalvikvm(327): at > >> android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:203 > >> ) > >> 12-17 12:48:44.194: INFO/dalvikvm(327): at > >> android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelp > >> er.java:98) > >> 12-17 12:48:44.194: INFO/dalvikvm(327): at > >> android.test.JavaScriptInterface.insertvalues(test.java:32) > >> 12-17 12:48:44.224: INFO/dalvikvm(327): at > >> android.test.JavaScriptInterface.gotit(test.java:23) > >> 12-17 12:48:44.224: INFO/dalvikvm(327): at > >> android.webkit.WebViewCore.nativeTouchUp(Native Method) > >> 12-17 12:48:44.224: INFO/dalvikvm(327): at > >> android.webkit.WebViewCore.nativeTouchUp(Native Method) > >> 12-17 12:48:44.244: INFO/dalvikvm(327): at > >> android.webkit.WebViewCore.access$3300(WebViewCore.java:52) > >> 12-17 12:48:44.254: INFO/dalvikvm(327): at > >> android.webkit.WebViewCore$EventHub$1.handleMessage(WebViewCore.java:1150) > >> 12-17 12:48:44.264: INFO/dalvikvm(327): at > >> android.os.Handler.dispatchMessage(Handler.java:99) > >> 12-17 12:48:44.304: INFO/dalvikvm(327): at > >> android.os.Looper.loop(Looper.java:123) > >> 12-17 12:48:44.304: INFO/dalvikvm(327): at > >> android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:621) > >> 12-17 12:48:44.334: INFO/dalvikvm(327): at > >> java.lang.Thread.run(Thread.java:1096) > > >> It would be helpful if someone could provide some pointers to handle this. > >> I could use catch and finally blocks, but the database should open atleast. > > >> Thanks. > > >> Cuil > > >> On Thu, Dec 16, 2010 at 6:23 PM, cuil yahoo <[email protected]> wrote: > > >>> Hello, > > >>> I am trying to use a database to store a huge text in it serially(using a > >>> primary key, for easy searching). > > >>> I have already done the following things, > > >>> 1. Created a SQLite database(named database) using the SQLite Database > >>> Browser, and have imported that to my assets folder in Eclipse. The > >>> database > >>> has two fields one _id(primarykey) and saveme(the text field). > > >>> 2. Now, i want to write stuff in this database, however when i try to > >>> open the database using the code below, i get a SQLite Code 14 type of an > >>> error( which on a google result showed up error on opening of database). > > >>> SQLiteDatabase writedatabase = null; > >>> writedatabase.openDatabase("file:///android_asset/database",null,0); > >>> writedatabase.execSQL("INSERT INTO " + "database" + " Values ('1', > >>> 'first')"); > > >>> It would be really very helpful, if someone could please point the error > >>> in the steps. > > >>> Thanks. > > >>> Cuil > > >> -- > >> You received this message because you are subscribed to the Google > >> Groups "Android Developers" group. > >> To post to this group, send email to [email protected] > >> To unsubscribe from this group, send email to > >> [email protected] > >> For more options, visit this group at > >>http://groups.google.com/group/android-developers?hl=en > > >> -- > >> Kostya Vasilyev -- WiFi Manager + pretty widget > >> --http://kmansoft.wordpress.com > > >> -- > >> You received this message because you are subscribed to the Google > >> Groups "Android Developers" group. > >> To post to this group, send email to [email protected] > >> To unsubscribe from this group, send email to > >> [email protected]<android-developers%2Bunsubs > >> [email protected]> > >> For more options, visit this group at > >>http://groups.google.com/group/android-developers?hl=en > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected] > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > > -- > > Kostya Vasilyev -- WiFi Manager + pretty widget > > --http://kmansoft.wordpress.com > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected]<android-developers%2Bunsubs > > [email protected]> > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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