7
Recibo el siguiente error al intentar consultar mi base de datos con mi ContentProvider personalizado que se muestra a continuación.IllegalStateException: tablas no válidas al intentar consultar la base de datos con ContentProvider
He confirmado que la tabla existe con el nombre correcto y todavía no está funcionando.
Pude hacer que funcionara con una consulta sin procesar, pero quiero que nos muestre el patrón ContentProvider para practicar.
Gracias, avísame si necesitas más información.
SQLiteOpenHelper
public class DatabaseHelper extends SQLiteOpenHelper {
private static final String TAG = DatabaseHelper.class.getSimpleName();
private static final String DB_PATH =
"/data/data/ashton.android.personal.worktc/databases/";
private static final String DB_NAME = "worktc.db";
private static final int DB_VERSION = 1;
private SQLiteDatabase myDatabase;
private final Context context;
public DatabaseHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION);
this.context = context;
}
/**
* Creates a empty database on the system and rewrites it with your own database.
* */
public void createDataBase() throws IOException {
boolean dbExist = this.checkDataBase();
if (dbExist) {
//do nothing - database already exist
} else {
Log.e(TAG, "Database does not exist when trying to create it.");
//By calling this method and empty database will be created into the default system path
//of your application so we are gonna be able to overwrite that database with our database.
this.getReadableDatabase();
this.close();
try {
this.copyDataBase();
Log.e(TAG, "createDatabase database created");
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
/**
* Check if the database already exist to avoid re-copying the file each time you open the application.
* @return true if it exists, false if it doesn't
*/
private boolean checkDataBase(){
File dbFile = new File(DB_PATH + DB_NAME);
return dbFile.exists();
}
/**
* Copies your database from your local assets-folder to the just created empty database in the
* system folder, from where it can be accessed and handled.
* This is done by transfering bytestream.
* */
private void copyDataBase() throws IOException{
//Open your local db as the input stream
InputStream myInput = this.context.getAssets().open(DB_NAME);
//Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(DB_PATH + DB_NAME);
//transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}
//Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
public boolean openDataBase() throws SQLException {
//Open the database
String myPath = DB_PATH + DB_NAME;
this.myDatabase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.CREATE_IF_NECESSARY);
return this.myDatabase != null;
}
@Override
public synchronized void close() {
if(this.myDatabase != null)
this.myDatabase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
}
}
ContentProvider
public class WorkTCContentProvider extends ContentProvider {
private static final String TAG = WorkTCContentProvider.class.getSimpleName();
public static final String AUTHORITY =
"ashton.android.personal.worktc.database";
private static final UriMatcher sURIMatcher = new UriMatcher(UriMatcher.NO_MATCH);
static {
sURIMatcher.addURI(
AUTHORITY,
ProfessionTable.TABLE_NAME,
ProfessionTable.PROFESSIONS);
sURIMatcher.addURI(
AUTHORITY,
ProfessionTable.TABLE_NAME + "/#",
ProfessionTable.PROFESSIONS_ID);
}
private DatabaseHelper database;
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
// TODO Auto-generated method stub
return 0;
}
@Override
public String getType(Uri uri) {
// TODO Auto-generated method stub
return null;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean onCreate() {
Log.d(TAG, "before database creation");
this.database = new DatabaseHelper(getContext());
try {
this.database.createDataBase();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
this.database.openDataBase();
this.database.close();
Log.d(TAG, "after database creation");
// this.database.getWritableDatabase().execSQL("pragma foreign_keys = on;");
return false;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
switch (sURIMatcher.match(uri)) {
case ProfessionTable.PROFESSIONS:
/*
* Dont do anything, just do the normal query.
*/
break;
case ProfessionTable.PROFESSIONS_ID:
queryBuilder.appendWhere(ProfessionTable._ID + "=" + uri.getLastPathSegment());
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
SQLiteDatabase db = this.database.getReadableDatabase();
Cursor cursor = queryBuilder.query(
db,
projection,
selection,
selectionArgs,
null,
null,
sortOrder);
cursor.setNotificationUri(WorkTCApp.getContext().getContentResolver(), uri);
return cursor;
}
@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
// TODO Auto-generated method stub
return 0;
}
}
ProfessionTable
public final class ProfessionTable implements BaseColumns {
public static final String TABLE_NAME = "Professions";
public static final Uri URI =
Uri.parse("content://" + WorkTCContentProvider.AUTHORITY + "/" + TABLE_NAME);
public static final int PROFESSIONS = 10;
public static final int PROFESSIONS_ID = 11;
public static final String NAME = "name";
public static final String ICON = "icon";
private ProfessionTable() {}
}
error
09-08 11:16:18.285: E/AndroidRuntime(11651): FATAL EXCEPTION: main
09-08 11:16:18.285: E/AndroidRuntime(11651): java.lang.RuntimeException: Unable to start activity ComponentInfo{ashton.android.personal.worktc/ashton.android.personal.worktc.controllers.WorkActivity}: java.lang.IllegalStateException: Invalid tables
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.os.Handler.dispatchMessage(Handler.java:99)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.os.Looper.loop(Looper.java:130)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.app.ActivityThread.main(ActivityThread.java:3687)
09-08 11:16:18.285: E/AndroidRuntime(11651): at java.lang.reflect.Method.invokeNative(Native Method)
09-08 11:16:18.285: E/AndroidRuntime(11651): at java.lang.reflect.Method.invoke(Method.java:507)
09-08 11:16:18.285: E/AndroidRuntime(11651): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
09-08 11:16:18.285: E/AndroidRuntime(11651): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
09-08 11:16:18.285: E/AndroidRuntime(11651): at dalvik.system.NativeStart.main(Native Method)
09-08 11:16:18.285: E/AndroidRuntime(11651): Caused by: java.lang.IllegalStateException: Invalid tables
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.database.sqlite.SQLiteDatabase.findEditTable(SQLiteDatabase.java:1127)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:330)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:280)
09-08 11:16:18.285: E/AndroidRuntime(11651): at ashton.android.personal.worktc.database.worktcContentProvider.query(worktcContentProvider.java:104)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.content.ContentProvider$Transport.query(ContentProvider.java:187)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.content.ContentResolver.query(ContentResolver.java:267)
09-08 11:16:18.285: E/AndroidRuntime(11651): at ashton.android.personal.worktc.views.WorkView.onFinishInflate(WorkView.java:96)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.view.LayoutInflater.rInflate(LayoutInflater.java:631)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.view.View.inflate(View.java:8884)
09-08 11:16:18.285: E/AndroidRuntime(11651): at ashton.android.personal.worktc.controllers.WorkActivity.onCreate(WorkActivity.java:30)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-08 11:16:18.285: E/AndroidRuntime(11651): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
09-08 11:16:18.285: E/AndroidRuntime(11651): ... 11 more
Estoy llamando 'SQLiteDatabase db = this.database.getReadableDatabase();' no tiene que abrir/crear la base de datos si es necesario? Eso es lo que dice en el javadoc. – prolink007
Primero: ¿qué línea es 104 en 'worktcContentProvider'? – Sam
'Cursor cursor = queryBuilder.query (' – prolink007