0

这是我的原木猫

          java.lang.RuntimeException: Unable to start activity   ComponentInfo{XXXXXX}: java.lang.IllegalStateException:   Couldn't read row 0, col 0 from CursorWindow. Make sure the Cursor is initialized correctly   before accessing data from it.
         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1960)
         at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1985)
         at android.app.ActivityThread.access$600(ActivityThread.java:127)
         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1151)
         at android.os.Handler.dispatchMessage(Handler.java:99)
         at android.os.Looper.loop(Looper.java:137)
         at android.app.ActivityThread.main(ActivityThread.java:4482)
         at java.lang.reflect.Method.invokeNative(Native Method)
         at java.lang.reflect.Method.invoke(Method.java:511)
         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:561)
         at dalvik.system.NativeStart.main(Native Method)
         Caused by: java.lang.IllegalStateException: Couldn't read row 0, col 0 from      CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
         at android.database.CursorWindow.nativeGetString(Native Method)
         at android.database.CursorWindow.getString(CursorWindow.java:442)
         at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
         at com.gallops.CheckProfile.fillData(CheckProfile.java:171)
         at com.gallops.CheckProfile.onCreate(CheckProfile.java:154)
         at android.app.Activity.performCreate(Activity.java:4728)
         at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1051)
         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1924)
         ... 11 more

我正在尝试运行的查询：//DBAdapter 文件

   public Cursor fetchRow(String a) {
            String Key = a; 
            return mDb.query(DATABASE_TABLE0, new String[] {IDno1, GIDno1,Name1,Owner1,Breed1,Gender1, Notes1,Nature1,Color1,Sire1,Dam1,Height1,Foaled1,Acquired1,Date1,IMG}, "IDno=?",new String[]{Key}, null, null, null, null);
}

我调用它的函数：

           private void fillData() {
    String D = getid();

  Cursor c = DBHelper.fetchRow(IDB);

   // List<String> idList = new ArrayList<String>();
    if (c.moveToFirst()) {
        do {
            String X = (c.getString(c.getColumnIndexOrThrow("IDno")));
            TextView tv2=(TextView)findViewById(R.id.textView3);
            tv2.setText(X);

            String B = (c.getString(c.getColumnIndexOrThrow("GIDno")));
            TextView tv6=(TextView)findViewById(R.id.textView7);
            tv6.setText(B);

            String A = (c.getString(c.getColumnIndexOrThrow("Name")));
            TextView tv=(TextView)findViewById(R.id.textView1);
            tv.setText(A);
            NameTop = A; 

            String Y = (c.getString(c.getColumnIndexOrThrow("Owner")));
            TextView tv12=(TextView)findViewById(R.id.textView13);
            tv12.setText(Y);

            String G = (c.getString(c.getColumnIndexOrThrow("Breed")));
            TextView tv10=(TextView)findViewById(R.id.textView11);
            tv10.setText(G);

            String N = (c.getString(c.getColumnIndexOrThrow("Notes")));
            TextView tv8=(TextView)findViewById(R.id.textView9);
            tv8.setText(N);

            String da = (c.getString(c.getColumnIndexOrThrow("Dam")));
            TextView tv14=(TextView)findViewById(R.id.TextView02);
            tv14.setText(da);

            String si = (c.getString(c.getColumnIndexOrThrow("Sire")));
            TextView tv16=(TextView)findViewById(R.id.TextView04);
            tv16.setText(si);

            String co = (c.getString(c.getColumnIndexOrThrow("Color")));
            TextView tv18=(TextView)findViewById(R.id.TextView06);
            tv18.setText(co);


            String g = (c.getString(c.getColumnIndexOrThrow("Gender")));
            TextView tv20=(TextView)findViewById(R.id.TextView08);
            tv20.setText(g);


            String na = (c.getString(c.getColumnIndexOrThrow("Nature")));
            TextView tv22=(TextView)findViewById(R.id.TextView10);
            tv22.setText(na);


            String he = (c.getString(c.getColumnIndexOrThrow("Height")));
            TextView tv24=(TextView)findViewById(R.id.TextView12);
            tv24.setText(he);


            String fo = (c.getString(c.getColumnIndexOrThrow("Foaled")));
            //TextView tv26=(TextView)findViewById(R.id.TextView14);
            //tv26.setText(fo);


            String ac = (c.getString(c.getColumnIndexOrThrow("Acquired")));
            TextView tv28=(TextView)findViewById(R.id.TextView16);
            tv28.setText(ac);

           /*Dt = (c.getString(c.getColumnIndexOrThrow("Date")));
            int age = age(Dt);
            TextView Tvx =(TextView)findViewById(R.id.textView5);
            String DD = Integer.toString(age);
            Tvx.setText(DD); */

            Image = c.getBlob(c.getColumnIndex("image"));

            if (Image!=null){
            BitmapFactory.Options options = new BitmapFactory.Options();
                    bitmap = BitmapFactory.decodeByteArray(Image, 0, Image.length, options); 
                    ImageView Img = (ImageView)findViewById(R.id.imageView1);
                    Img.setImageBitmap(bitmap); 
            }else{
                ImageView Img = (ImageView)findViewById(R.id.imageView1);
                Img.setBackgroundResource(R.drawable.pic); 
            }

        } while (c.moveToNext());
        DBHelper.close();

    } 
}
4

2 回答 2

1

尝试这个

在您的活动中全局声明光标

游标数据游标；

 And then assign to datacursor instead of c.

 datacursor = DBHelper.fetchRow(IDB);

使用访问该行datacursor

于 2013-03-06T06:04:43.387 回答
1

您可能想要编写一些输出到 logcat 的调试行，以确保您实际在光标中获取信息，并且您正在获取您认为应该获得的信息。

在尝试使用其中的数据之前，您还需要检查光标是否不为空。如果光标为空，应用程序将崩溃。我很难学到这一点。您可以使用以下方法检查空游标：

if(cu != null && cu.getCount() > 0){
    cu.moveToFirst();
    // The rest of your code
}
于 2013-03-06T06:14:44.000 回答