我想添加一些圖像uri的數據庫。我的數據庫表有兩列id和String Uri。問題是它顯示當試圖插入一些Uris到表時沒有這樣的表存在。這是我的數據庫適配器類代碼。Android Sqlite顯示沒有這樣的表
package com.example.mystorage;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DBAdapter {
// for customer registration
static final String KEY_ID = "id";
static final String KEY_URI = "uri";
static final String DATABASE_NAME = "IMAGE_DB";
static final String DATABASE_TABLE = "temp_images1";
static final int DATABASE_VERSION = 2;
static final String DATABASE_CREATE = "create table temp_images1 (id integer autoincrement, "
+ "uri text not null);";
final Context context;
DatabaseHelper DBHelper;
SQLiteDatabase db;
public DBAdapter(Context ctx) {
this.context = ctx;
DBHelper = new DatabaseHelper(context);
}
private static class DatabaseHelper extends SQLiteOpenHelper {
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
public void onCreate(SQLiteDatabase db) {
try {
db.execSQL(DATABASE_CREATE);
} catch (SQLException e) {
e.printStackTrace();
}
}
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS temp_images1");
onCreate(db);
}
}
public DBAdapter open() throws SQLException {
db = DBHelper.getWritableDatabase();
return this;
}
public void close() {
DBHelper.close();
}
// //////////////////////////////////////for
// customerRegistration////////////////
// customer registration for retrieve data
public Cursor getAllImages() {
return db.query(DATABASE_TABLE, new String[] {KEY_URI}, null,
null, null, null, null);
}
public Cursor getContentimage(long id) throws SQLException {
Cursor c = db.query(true, DATABASE_TABLE,
new String[] { KEY_ID, KEY_URI },
KEY_ID + "=" + id, null, null,
null, null, null);
if (c != null) {
c.moveToFirst();
}
return c;
}
// customer registration for update data
public boolean updateimages(long id, String uri) {
ContentValues args = new ContentValues();
// args.put(KEY_ID,id);
args.put(KEY_URI, uri);
return db.update(DATABASE_TABLE, args, KEY_ID + "=" + id, null) > 0;
}
// customer registration for insert data
public long insertImages(String uri) {
ContentValues args = new ContentValues();
//args.put(KEY_ID, id);
args.put(KEY_URI, uri);
long n = db.insert(DATABASE_TABLE, null, args);
//db.insertOrThrow(DATABASE_TABLE, null, args);
return n;
}
// customer registration for remove data
public boolean deleteImages(long id) {
return db.delete(DATABASE_TABLE, KEY_ID + "=" + id, null) > 0;
}
}
這裏是我的ImageAdapter類,我在調用插入方法。 mThumbs是uri Arraylist在檢索時存儲數據庫的內容。
public ImageAdapter(Context c, android.net.Uri uri) {
mContext = c;
db= new DBAdapter(mContext);
try {
db.open();
db.insertImages(uri.toString());
db.close();
}catch(Exception e){
e.printStackTrace();
}
upadteAllImages();
notifyDataSetChanged();
}
public ImageAdapter(Context c, ArrayList<Uri> imageUris) {
mContext = c;
db= new DBAdapter(mContext);
try {
db.open();
for (int i = 0; i < imageUris.size(); i++){
db.insertImages(imageUris.get(i).toString());
}
db.close();
}catch(Exception e){
e.printStackTrace();
}
upadteAllImages();
notifyDataSetChanged();
}
private void upadteAllImages() {
mTHumbs.clear();
try{
db.open();
Cursor c = db.getAllImages();
if (c.moveToFirst()) {
while (c.moveToNext()){
String uri = c.getString(1);
mTHumbs.add(Uri.parse(uri));
}
}
//mTHumbs.add((Uri) db.getAllImages());
db.close();
}catch(Exception e){
e.printStackTrace();
}
}
請看看我的回答 –
這不是我努力工作。仍然插入返回-1。 –
仍然沒有找到表?還是別的什麼? –