我正在尝试将相机拍摄的照片保存到我的SQLite数据库中，但我在数据库中获取的所有内容都为空。我的转换错了吗？我看不出我做错了什么。
这是我的片段：
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
public class SpendingDetails extends Fragment {
private static final String TAG = "Spending Fragment";
String id;
View view;
String cursorNote;
String cursorTime;
String cursorDate;
String cursorLatitude;
String cursorLongitude;
String cursorAmount;
String cursorPicture;
ImageView image;
int REQUEST_CODE = 1;
int RESULT_OK =1;
MyDBHandler db;
SQLiteDatabase dataBase;
Cursor cursor;
Bitmap BMP;
public SpendingDetails() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
id = getArguments().getString("id");
view= inflater.inflate(R.layout.more_details, container, false);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
db = new MyDBHandler(getActivity(),null,null,3);
dataBase = db.getWritableDatabase();
cursor=dataBase.rawQuery("SELECT * FROM spendings_table WHERE _id=" + id, null);
// Toast.makeText(getContext(), "ID passed : " + id, Toast.LENGTH_SHORT).show();
TextView note = (TextView) view.findViewById(R.id.note);
TextView time = (TextView) view.findViewById(R.id.time_details);
TextView date = (TextView) view.findViewById(R.id.date);
image = (ImageView) view.findViewById(R.id.imageView);
if( cursor != null && cursor.moveToFirst() ){
cursorNote = cursor.getString(cursor.getColumnIndexOrThrow("_note"));
cursorTime = cursor.getString(cursor.getColumnIndexOrThrow("_time"));
cursorDate = cursor.getString(cursor.getColumnIndexOrThrow("_date"));
}
note.setText(String.valueOf(cursorNote));
time.setText(String.valueOf(cursorTime));
date.setText(String.valueOf(cursorDate));
byte[] picture = cursor.getBlob(cursor.getColumnIndexOrThrow("_picture"));
image.setImageBitmap(BitmapFactory.decodeByteArray(picture,0,picture.length));
image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(i, REQUEST_CODE);
}// end onClick
});
}
public void onActivityResult(int requestcode, int resultcode, Intent data){
if (requestcode==REQUEST_CODE){
Bundle bundle = data.getExtras();
BMP =(Bitmap) bundle.get("data");
image.setImageBitmap(BMP);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
BMP.compress(Bitmap.CompressFormat.PNG, 100, stream);
db.addPicture(stream.toByteArray());
}
}
}
我的DBHandler：
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteQuery;
import android.widget.Toast;
public class MyDBHandler extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "payzati_spendings.db";
private static final String TABLE_NAME = "spendings_table";
private static final String COLUMN_ID = "_id";
private static final String COLUMN_TRANSACTION = "_transactionType";
private static final String COLUMN_LOCATION = "_location";
private static final String COLUMN_DATE = "_date";
private static final String COLUMN_TIME = "_time";
private static final String COLUMN_LONGITUDE = "_longitude";
private static final String COLUMN_LATITUDE = "_latitude";
private static final String COLUMN_NOTE = "_note";
private static final String COLUMN_PICTURE = "_picture";
private static final String COLUMN_AMOUNT = "_amount";
public MyDBHandler(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, DATABASE_NAME, null, version);
}
@Override
public void onCreate(SQLiteDatabase db) {
String query = " CREATE TABLE "+ TABLE_NAME + "( " +
COLUMN_ID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+
COLUMN_TRANSACTION+" TEXT, "+
COLUMN_AMOUNT+" DOUBLE, "+
COLUMN_LOCATION+" TEXT, "+
COLUMN_TIME+" TEXT, "+
COLUMN_DATE+" TEXT, "+
COLUMN_NOTE+" TEXT, "+
COLUMN_LONGITUDE+" DOUBLE, "+
COLUMN_LATITUDE+" DOUBLE, "+
COLUMN_PICTURE+" BLOB "+
")";
db.execSQL(query);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
// public void addRow(SpendingRow spendingRow){
public void addRow(String transaction, double amount,String note, String location, String date,String time, double longitude, double latitude){
ContentValues values = new ContentValues();
values.put(COLUMN_TRANSACTION, transaction);
values.put(COLUMN_AMOUNT, amount);
values.put(COLUMN_LOCATION, location);
values.put(COLUMN_DATE, date);
values.put(COLUMN_TIME, time);
values.put(COLUMN_LONGITUDE, longitude);
values.put(COLUMN_LATITUDE, latitude);
values.put(COLUMN_NOTE, note);
SQLiteDatabase db = getWritableDatabase();
db.insert(TABLE_NAME, null, values);
}
public void addPicture(byte[] bytes){
ContentValues values = new ContentValues();
values.put(COLUMN_PICTURE, bytes);
SQLiteDatabase db = getWritableDatabase();
db.insert(TABLE_NAME, null, values);
}
}