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嗯，我一直爭取這一切的昨天和今天，我有一個簡單的SQLite插入即不斷返回-1作爲返回值，我讀的地方，改變主鍵名_id但沒有改變。SQLite的插入失敗
所以這裏有運算代碼的卡扣。 我的領域常量：
//BALLS TABLE
public static final String BALLS_TABLE = "balls";
public static final String BALL_ID = "id";
public static final String BALL_USERID = "userId";
public static final String BALL_MODEL = "model";
public static final String BALL_BRAND = "brand";
public static final String BALL_SERIAL = "serial";
public static final String BALL_NOTES = "notes";
public static final String BALL_IMAGE = "image";
然後我createTables（SQLiteDatabase DB）我得到
// BALLS表
db.execSQL(
"create table " + BALLS_TABLE +" (" +
BALL_ID + " integer primary key autoincrement not null," +
BALL_USERID + "integer not null," +
BALL_MODEL + " text not null," +
BALL_BRAND + " text not null," +
BALL_SERIAL + " text not null," +
BALL_NOTES + " text not null," +
BALL_IMAGE + " blob" +
");");
表的創建工作，我還有其他的表已被填充。
最後整個球Helper類
package com.kegel.android.bowlermanager.data;
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
public class BallHelper {
private SQLiteDatabase database;
private ArrayList<Ball> currentBalls;
private Context context;
public BallHelper(Context context,SQLiteDatabase database)
{
this.context = context;
this.database = database;
loadBalls();
}
public ArrayList<Ball> getCurrentBalls() {
return currentBalls;
}
public Boolean BallExists(long id)
{
for (Ball ball : currentBalls)
{
if (ball.getId() == id)
return true;
}
return false;
}
public Boolean BallExists(Ball u)
{
for (Ball ball : currentBalls)
{
if (ball.getId() == u.getId())
return true;
}
return false;
}
public void updateBall(Ball b) {
assert(null != b);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] by = null;
if (b.getImage() != null)
{
Bitmap bmp = b.getImage();
bmp.compress(Bitmap.CompressFormat.PNG, 100, baos);
by = baos.toByteArray();
}
ContentValues values = new ContentValues();
values.put(SQLiteOpenDataHelper.BALL_USERID, 1);
values.put(SQLiteOpenDataHelper.BALL_MODEL, b.getModel());
values.put(SQLiteOpenDataHelper.BALL_BRAND , b.getBrand());
values.put(SQLiteOpenDataHelper.BALL_SERIAL , b.getSerial());
values.put(SQLiteOpenDataHelper.BALL_NOTES, b.getNotes());
values.put(SQLiteOpenDataHelper.BALL_IMAGE , by);
if (b.isValid())
{
if (b.getId() == 0)
{
b.setId(database.insert(SQLiteOpenDataHelper.BALLS_TABLE, null, values));
}
else
{
long id = b.getId();
String where = String.format("%s = %d", SQLiteOpenDataHelper.BALL_ID, id);
database.update(SQLiteOpenDataHelper.BALLS_TABLE, values, where, null);
}
loadBalls();
}
}
public void deleteBalls(Long id) {
String where = String.format("%s in (%s)", SQLiteOpenDataHelper.BALL_ID, id);
database.delete(SQLiteOpenDataHelper.BALLS_TABLE, where, null);
loadBalls();
}
public void deleteBalls(Ball u) {
String where = String.format("%s in (%s)", SQLiteOpenDataHelper.BALL_ID, u.getId());
database.delete(SQLiteOpenDataHelper.BALLS_TABLE, where, null);
loadBalls();
}
private void loadBalls() {
byte[] img = null;
currentBalls = new ArrayList<Ball>();
//try
//{
Cursor ballsCursor = database.query(SQLiteOpenDataHelper.BALLS_TABLE, new String[] {SQLiteOpenDataHelper.BALL_ID,SQLiteOpenDataHelper.USER_ID, SQLiteOpenDataHelper.BALL_MODEL, SQLiteOpenDataHelper.BALL_BRAND, SQLiteOpenDataHelper.BALL_SERIAL, SQLiteOpenDataHelper.BALL_NOTES, SQLiteOpenDataHelper.BALL_IMAGE}, null, null, null, null, null);
ballsCursor.moveToFirst();
Ball b;
if (! ballsCursor.isAfterLast()) {
do {
long id = ballsCursor.getInt(0);
long bowlerId = ballsCursor.getLong(1);
String model = ballsCursor.getString(2);
String brand = ballsCursor.getString(3);
String serial = ballsCursor.getString(4);
String notes = ballsCursor.getString(5);
img = ballsCursor.getBlob(6);
Bitmap bmp=BitmapFactory.decodeByteArray(img,0,img.length);
b = new Ball(context,bowlerId,model,brand,serial,notes);
b.setId(id);
b.setImage(bmp);
currentBalls.add(b);
} while (ballsCursor.moveToNext());
}
ballsCursor.close();
}
}
第二雙眼睛在這裏會來得心應手！所以如果任何人都可以在這裏發現任何東西，或者讓我知道如果我錯過了一些東西，我會非常感激。我已經檢查了B中的值（甚至通過我的內部驗證），但和插入這樣會失敗：
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.fake_pofile);
Ball ball = new Ball(this,1, "Test", "Test", "", "");
ball.setImage(bm);
mHelper.updateBall(ball);
在日誌中的任何異常或其他信息？ –
插入失敗如何？ Logcat中有沒有消息？所有球的ID –
首先是自動增量（在創建表的查詢中定義），不知道這是好主意，插入與definded ID球，同時具有自動增量。二，我已經看到你正在使用布爾代替布爾值，因此你也可能使用Integer而不是int，Integer是對象。當您檢查是否ball.getId（）== 0，球的ID可以不初始化，它可能會導致空指針異常。並請張貼例外，所以可能看到了什麼錯誤;） – Serhiy