Hi Everyone,
I am writing program for which I am creating my own ContentProvider. I
want a database of people (by name) and the debt that they owe to the
user (it's an app to keep track of debt). However, it is refusing to
run. I have posted below the ContentProvider that I use. The Activity
class that calls on this provider and the manifest. But no luck in
getting it run. Any ideas?
Here is the ContentProvider:
package com.Split.ourfirstandroidapp;
import android.content.*;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.*;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.net.Uri;
import android.text.*;
import android.util.*;
public class SplitProvider extends ContentProvider {
public static final Uri CONTENT_URI = Uri.parse("content://
com.Split.ourfirstandroidapp.provider.friend/friends");
private SQLiteDatabase splitDB;
private static final String TAG = "SplitProvider";
private static final String DATABASE_NAME = "split.db";
private static final String DATABASE_TABLE = "friends";
private static final int DATABASE_VERSION = 1;
//Column names
public static final String KEY_ID = "_id";
public static final String KEY_NAME = "name";
public static final String KEY_DEBT = "debt";
//Column indices
public static final int NAME_COLUMN = 1;
public static final int DEBT_COLUMN = 2;
//URI request handles
private static final int FRIENDS = 1;
private static final int FRIENDS_ID = 2;
private static final UriMatcher uriMatcher;
static {
uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
uriMatcher.addURI("com.Split.provider.friend", "friends",
FRIENDS);
uriMatcher.addURI("com.Split.provider.friend", "friends/#",
FRIENDS_ID);
}
//nested helper class start
private static class SplitDatabaseHelper extends SQLiteOpenHelper{
private static final String DATABASE_CREATE =
"create table" + DATABASE_TABLE + " ("
+ KEY_ID + " integer primary key autoincrement, "
+ KEY_NAME + " TEXT, "
+ KEY_DEBT + " INT)";
public SplitDatabaseHelper (Context context, String name,
CursorFactory factory, int version){
super(context, name, factory, version);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int
newVersion) {
Log.w(TAG, "Upgrading database from version " +
oldVersion + " to
"+ newVersion
+ ", which will destroy old data");
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
onCreate(db);
}
}
//nested helper class end!
@Override
public int delete(Uri uri, String where, String[] whereArgs) {
int count;
switch (uriMatcher.match(uri)){
case FRIENDS:
count = splitDB.delete(DATABASE_TABLE, where,
whereArgs);
break;
case FRIENDS_ID:
String segment = uri.getPathSegments().get(1);
count = splitDB.delete(DATABASE_TABLE, KEY_ID + "="
+ segment + (!TextUtils.isEmpty(where)?
" AND (" + where + ')' :
""),
whereArgs);
break;
default: throw new
IllegalArgumentException("Unsupported URI: "+
uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return count;
}
@Override
public String getType(Uri uri) {
switch (uriMatcher.match(uri)){
case FRIENDS: return "vnd.android.cursor.dir/
vnd.Split.ourfirstandroidapp.friend";
case FRIENDS_ID: return "vnd.android.cursor.item/
vnd.Split.ourfirstandroidapp.friend";
default: throw new IllegalArgumentException("Unsupported URI: "
+uri);
}
}
@Override
public Uri insert(Uri _uri, ContentValues _initialValues) {
long rowID = splitDB.insert(DATABASE_TABLE, "friend",
_initialValues);
if (rowID > 0){
Uri uri = ContentUris.withAppendedId(CONTENT_URI,
rowID);
getContext().getContentResolver().notifyChange(uri,
null);
return uri;
}
throw new SQLException ("Failed to insert row into " + _uri);
}
@Override
public boolean onCreate() {
Context context = getContext();
SplitDatabaseHelper dbHelper = new SplitDatabaseHelper(context,
DATABASE_NAME,
null, DATABASE_VERSION);
splitDB = dbHelper.getWritableDatabase();
return (splitDB == null) ? false : true;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sort) {
SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
qb.setTables(DATABASE_TABLE);
switch (uriMatcher.match(uri)){
case FRIENDS_ID: qb.appendWhere(KEY_ID + "="+
uri.getPathSegments().get(1));
break;
default: break;
}
String orderBy;
if (TextUtils.isEmpty(sort)){
orderBy = KEY_NAME;
} else{
orderBy = sort;
}
Cursor c = qb.query(splitDB, projection, selection,
selectionArgs,
null,null, orderBy);
c.setNotificationUri(getContext().getContentResolver(), uri);
return c;
}
@Override
public int update(Uri uri, ContentValues values, String where,
String[] whereArgs) {
int count;
switch (uriMatcher.match(uri)){
case FRIENDS:
count = splitDB.update(DATABASE_TABLE, values, where,
whereArgs);
break;
case FRIENDS_ID:
String segment = uri.getPathSegments().get(1);
count = splitDB.update(DATABASE_TABLE, values, KEY_ID +
"="
+ segment + (!TextUtils.isEmpty(where)?
" AND (" + where + ')' :
""),
whereArgs);
break;
default: throw new IllegalArgumentException("Unknown
URI: "+ uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return count;
}
}
HERE IS THE ACTIVITY CLASS:
package com.Split.ourfirstandroidapp;
import java.util.ArrayList;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Contacts.People;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
public class EvenSplit extends Activity {
ListView friendsListView;
ArrayAdapter<Friend> aa;
ArrayList<Friend> friends = new ArrayList<Friend>();
@Override
public void onCreate(Bundle icicle){
super.onCreate(icicle);
setContentView(R.layout.evensplit);
friendsListView = (ListView)this.findViewById(R.id.friendsList);
aa = new ArrayAdapter<Friend>(this, R.layout.item_friendlist,
friends);
friendsListView.setAdapter(aa);
/* final Uri data = Uri.parse("content://
com.Split.provider.friend/");
final Cursor c = managedQuery(SplitProvider.CONTENT_URI, null,
null, null, null);
String[] from = new String[] {SplitProvider.KEY_NAME};
int[] to = new int[] { R.id.item_friend};
SimpleCursorAdapter adapter = new
SimpleCursorAdapter(this,R.layout.item_friendlist,c,from,to);
ListView lv = (ListView)findViewById(R.id.friendsList);
lv.setAdapter(adapter);
*/
loadFriendsFromProvider();
Friend juhi = new Friend("Juhi", 2);
addNewFriend(juhi);
}
private void addFriendToArray(Friend _friend){
if(_friend.getDebt() != 0){
friends.add(_friend);
aa.notifyDataSetChanged();
}
}
private void addNewFriend(Friend _friend){
ContentResolver cr = getContentResolver();
String w = SplitProvider.KEY_NAME + "=" + _friend.getName();
//if the friend is new!
if (cr.query(SplitProvider.CONTENT_URI, null, w, null,
null).getCount()==0){
ContentValues values = new ContentValues();
values.put(SplitProvider.KEY_NAME, _friend.getName());
values.put(SplitProvider.KEY_DEBT, _friend.getDebt());
cr.insert(SplitProvider.CONTENT_URI, values);
friends.add(_friend);
addFriendToArray(_friend);
}
}
private void loadFriendsFromProvider(){
friends.clear();
ContentResolver cr = getContentResolver();
Cursor c = cr.query(SplitProvider.CONTENT_URI, null, null, null,
null);
if(c.moveToFirst()){
do{
String name =
c.getString(SplitProvider.NAME_COLUMN);
int debt = c.getInt(SplitProvider.DEBT_COLUMN);
Friend f = new Friend(name, debt);
addFriendToArray(f);
}
while(c.moveToNext());
}
}
}
Here is the Manifest!!
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android";
package="com.Split.ourfirstandroidapp"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/
app_name">
<activity android:name=".OurFirstAndroidApp"
android:label="Our First Android App">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".AddNewEvent"
android:label="Add New Event">
<intent-filter>
<action android:name = "android.intent.action.PICK"></
action>
<category android:name =
"android.intent.category.DEFAULT"></category>
<data android:path = "contacts"
android:scheme="content"></data>
</intent-filter>
</activity>
<activity android:name=".ContactPickerTester"
android:label="Contact Picker Tester">
</activity>
<activity android:name="SplitMethod"
android:label=".SplitMethod">
</activity>
<activity android:name="EvenSplit" android:label=".EvenSplit">
<intent-filter>
</intent-filter>
</activity>
<activity android:name="ManualSplit"
android:label=".ManualSplit">
</activity>
<provider android:name = ".SplitProvider"
android:authorities="com.Split.ourfirstandroidapp.provider.friend">
</provider>
</application>
<uses-permission android:name="android.permission.READ_CONTACTS"></
uses-permission>
<uses-sdk android:minSdkVersion="3" />
</manifest>
Any help is appreciated! Thanks! :)
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