我正在嘗試為計(jì)費(fèi)系統(tǒng)創(chuàng)建一個(gè)應(yīng)用程序。這些值被插入到數(shù)據(jù)庫(kù)中并成功檢索。另外，我需要數(shù)據(jù)庫(kù)中的總金額。數(shù)據(jù)庫(kù)輔助類public Cursor gettotal()    {        SQLiteDatabase database = this.getReadableDatabase();        Cursor cursor =database.rawQuery("select * from '"+PRODUCTS+"' ;", null);        Log.d(TAG, "gettotal: "+cursor.getCount());        return cursor;    }總計(jì)private void getTotal() {int m=0;        Cursor cursor = db.gettotal();        if(cursor.getCount()==0)        {            Toast.makeText(getApplicationContext(),"No message is available", Toast.LENGTH_LONG).show();        }        else        {            for(int k = 0; k<=cursor.getCount();k++) {                m += (int) Integer.parseInt(String.valueOf(cursor.getColumnIndex("amount")));            }            i=m;            total_amount.setText(m);        }}我的日志貓D/MainActivity: getTotal: -1E/uetooth_embade: Invalid ID 0x00000008.D/AndroidRuntime: Shutting down VME/AndroidRuntime: FATAL EXCEPTION: main    Process: com.example.bluetooth_embaded, PID: 14063    android.content.res.Resources$NotFoundException: String resource ID #0x8        at android.content.res.Resources.getText(Resources.java:360)        at android.content.res.MiuiResources.getText(MiuiResources.java:97)        at android.widget.TextView.setText(TextView.java:5837)        at com.example.bluetooth_embaded.MainActivity.getTotal(MainActivity.java:100)        at com.example.bluetooth_embaded.MainActivity.access$200(MainActivity.java:33)        at com.example.bluetooth_embaded.MainActivity$5.onClick(MainActivity.java:181)        at android.view.View.performClick(View.java:6616)        at android.view.View.performClickInternal(View.java:6593)        at android.view.View.access$3100(View.java:785)I/Process: Sending signal. PID: 14063 SIG: 9