java.lang.NullPointerException:println需要一条消息android数据库错误

我已经建立了一个数据库，它给了我这个错误

这是logcat

02-19 15:33:38.057    1273-1273/tubapps.dbtutorial E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{tubapps.dbtutorial/tubapps.dbtutorial.EditIncome}: java.lang.NullPointerException: println needs a message
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
            at android.app.ActivityThread.access$600(ActivityThread.java:130)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4745)
            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:786)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NullPointerException: println needs a message
            at android.util.Log.println_native(Native Method)
            at android.util.Log.d(Log.java:138)
            at tubapps.dbtutorial.EditIncome.onCreate(EditIncome.java:66)
            at android.app.Activity.performCreate(Activity.java:5008)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
            at android.app.ActivityThread.access$600(ActivityThread.java:130)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4745)
            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:786)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
            at dalvik.system.NativeStart.main(Native Method)

这是我的活动

public class EditIncome extends ActionBarActivity {

    DBHelper helper = new DBHelper(this);
    private Calendar calendar;
    private TextView dateView;
    private int year, month, day;

    TextView payer;
    TextView amount;
    Spinner payments;
    Spinner category;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_edit_income);

        dateView = (TextView) findViewById(R.id.input_date);
        calendar = Calendar.getInstance();
        year = calendar.get(Calendar.YEAR);
        month = calendar.get(Calendar.MONTH);
        day = calendar.get(Calendar.DAY_OF_MONTH);
        showDate(year, month + 1, day);

        payer = (TextView) findViewById(R.id.input_payer);
        amount = (TextView) findViewById(R.id.input_amount);
        dateView = (TextView) findViewById(R.id.input_date);

        payments = (Spinner) findViewById(R.id.incomeNumber);
        ArrayAdapter<CharSequence> payments_adapter = ArrayAdapter.createFromResource(this,
                R.array.recurring_income, android.R.layout.simple_spinner_item);
        payments_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        payments.setAdapter(payments_adapter);

        category = (Spinner) findViewById(R.id.categoryIncome);
        ArrayAdapter<CharSequence> income_adapter = ArrayAdapter.createFromResource(this,
                R.array.category_income, android.R.layout.simple_spinner_item);
        income_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        category.setAdapter(income_adapter);

        Intent objIntent = getIntent();
        String incomeId = objIntent.getStringExtra("incomeId");
        Log.d("Reading: ", "Reading all incomes..");
        HashMap<String, String> incomeList = helper.getIncomeInfo(incomeId);
        Log.d("incomeAmount",incomeList.get("incomeAmount"));
        Log.d("incomePayer",incomeList.get("incomePayer"));
        Log.d("incomeDate",incomeList.get("incomeDate"));
        Log.d("incomeCategory",incomeList.get("incomeCategory"));
        Log.d("incomePayments",incomeList.get("incomePayments"));
        if(incomeList.size()!=0) {
            amount.setText(incomeList.get("incomeAmount"));
            payer.setText(incomeList.get("incomePayer"));
            dateView.setText(incomeList.get("incomeDate"));
            payments.setSelection(getIndex(payments, "incomePayments"));
            category.setSelection(getIndex(category, "incomeCategory"));
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_edit_income, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public void setDate(View view) {
        showDialog(999);
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        // TODO Auto-generated method stub
        if (id == 999) {
            return new DatePickerDialog(this, myDateListener, year, month, day);
        }
        return null;
    }

    private DatePickerDialog.OnDateSetListener myDateListener
            = new DatePickerDialog.OnDateSetListener() {

        @Override
        public void onDateSet(DatePicker arg0, int arg1, int arg2, int arg3) {
            // TODO Auto-generated method stub
            // arg1 = year
            // arg2 = month
            // arg3 = day
            showDate(arg1, arg2 + 1, arg3);
        }
    };

    private void showDate(int year, int month, int day) {
        dateView.setText(new StringBuilder().append(day).append("/")
                .append(month).append("/").append(year));
    }

    public void editIncome(View view) {
        HashMap<String, String> queryValues = new HashMap<String, String>();
        payer = (TextView) findViewById(R.id.input_payer);
        amount = (TextView) findViewById(R.id.input_amount);
        dateView = (TextView) findViewById(R.id.input_date);

        payments = (Spinner) findViewById(R.id.incomeNumber);
        ArrayAdapter<CharSequence> payments_adapter = ArrayAdapter.createFromResource(this,
                R.array.recurring_income, android.R.layout.simple_spinner_item);
        payments_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        payments.setAdapter(payments_adapter);

        category = (Spinner) findViewById(R.id.categoryIncome);
        ArrayAdapter<CharSequence> income_adapter = ArrayAdapter.createFromResource(this,
                R.array.category_income, android.R.layout.simple_spinner_item);
        income_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        category.setAdapter(income_adapter);
        Intent objIntent = getIntent();
        String incomeId = objIntent.getStringExtra("incomeId");
        queryValues.put("incomeId", incomeId);
        queryValues.put("incomeAmount", amount.getText().toString());
        queryValues.put("incomePayer", payer.getText().toString());
        queryValues.put("incomeDate", dateView.getText().toString());
        queryValues.put("incomeCategory", category.getSelectedItem().toString());
        queryValues.put("incomePayments", payments.getSelectedItem().toString());

        helper.updateIncome(queryValues);
        this.callHomeActivity(view);
    }

    public void removeIncome(View view) {
        Intent objIntent = getIntent();
        String incomeId = objIntent.getStringExtra("incomeId");
        helper.deleteIncome(incomeId);
        this.callHomeActivity(view);

    }
    public void callHomeActivity(View view) {
        Intent objIntent = new Intent(getApplicationContext(), MainActivity.class);
        startActivity(objIntent);
    }

    private int getIndex(Spinner spinner, String myString) {

        int index = 0;

        for (int i = 0; i < spinner.getCount(); i++) {
            if (spinner.getItemAtPosition(i).equals(myString)) {
                index = i;
            }
        }
        return index;
    }
}

public class EditIncome扩展了ActionBarActivity{
DBHelper=newdbhelper（this）；
私人日历；
私有文本视图日期视图；
私人整数年、月、日；
文本视图付款人；
文本浏览量；
微调器支付；
微调器类别；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\u edit\u income）；
dateView=（TextView）findViewById（R.id.input\u date）；
calendar=calendar.getInstance（）；
year=calendar.get（calendar.year）；
month=calendar.get（calendar.month）；
day=calendar.get（calendar.day/u月）；
显示日期（年、月+1、日）；
付款人=（TextView）findViewById（R.id.input\u付款人）；
金额=（TextView）findViewById（R.id.input\U金额）；
dateView=（TextView）findViewById（R.id.input\u date）；
付款=（微调器）findViewById（R.id.incomeNumber）；
ArrayAdapter\u adapter=ArrayAdapter.createFromResource（此，
R.array.recurrence\u income，android.R.layout.simple\u spinner\u item）；
payments_adapter.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_项目）；
payments.setAdapter（payments\u adapter）；
类别=（微调器）findViewById（R.id.categoryIncome）；
ArrayAdapter\u adapter=ArrayAdapter.createFromResource（此，
R.array.category\u income，android.R.layout.simple\u spinner\u item）；
income_adapter.setDropDownViewResource（android.R.layout.simple_微调器_下拉项）；
类别.设置适配器（收入适配器）；
Intent objIntent=getIntent（）；
字符串incomeId=objIntent.getStringExtra（“incomeId”）；
日志d（“阅读：”，“阅读所有收入…”）；
HashMap incomeList=helper.getIncomeInfo（incomeId）；
Log.d（“incomeAmount”，incomeList.get（“incomeAmount”）；
Log.d（“收入付款人”，收入列表.get（“收入付款人”）；
Log.d（“incomeDate”，incomeList.get（“incomeDate”）；
Log.d（“incomeCategory”，incomeList.get（“incomeCategory”）；
Log.d（“incomePayments”，incomeList.get（“incomePayments”）；
如果（incomeList.size（）！=0）{
amount.setText（incomeList.get（“incomeAmount”））；
payer.setText（incomeList.get（“incomePayer”）；
dateView.setText（incomeList.get（“incomeDate”）；
支付。设置选择（getIndex（支付，“收入支付”）；
类别选择（getIndex（类别，“incomeCategory”）；
}
}
@凌驾
公共布尔onCreateOptions菜单（菜单）{
//为菜单充气；这会将项目添加到操作栏（如果存在）。
getMenuInflater（）.充气（R.menu.menu\u edit\u income，menu）；
返回true；
}
@凌驾
公共布尔值onOptionsItemSelected（菜单项项）{
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击，只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId（）；
//noinspection SimplifiableIf语句
if（id==R.id.action\u设置）{
返回true；
}
返回super.onOptionsItemSelected（项目）；
}
公共作废设置日期（查看）{
showDialog（999）；
}
@凌驾
受保护的对话框onCreateDialog（int id）{
//TODO自动生成的方法存根
如果（id==999）{
返回新的DatePickerDialog（this，myDateListener，year，month，day）；
}
返回null；
}
私有DatePickerDialog.OnDateSetListener myDateListener
=新建DatePickerDialog.OnDateSetListener（）{
@凌驾
公共void onDateSet（日期选择器arg0、int arg1、int arg2、int arg3）{
//TODO自动生成的方法存根
//arg1=年
//arg2=月份
//arg3=天
显示日期（arg1、arg2+1、arg3）；
}
};
私有无效显示日期（整数年、整数月、整数日）{
dateView.setText（新的StringBuilder（）.append（天）.append（“/”）
.append（月）。append（“/”）。append（年））；
}
公共收入（视图）{
HashMap queryValues=新HashMap（）；
付款人=（TextView）findViewById（R.id.input\u付款人）；
金额=（TextView）findViewById（R.id.input\U金额）；
dateView=（TextView）findViewById（R.id.input\u date）；
付款=（微调器）findViewById（R.id.incomeNumber）；
ArrayAdapter\u adapter=ArrayAdapter.createFromResource（此，
R.array.recurrence\u income，android.R.layout.simple\u spinner\u item）；
payments_adapter.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_项目）；
payments.setAdapter（payments\u adapter）；
类别=（微调器）findViewById（R.id.categoryIncome）；
ArrayAdapter\u adapter=ArrayAdapter.createFromResource（此，
R.array.category\u income，android.R.layout.simple\u spinner\u item）；
income_adapter.setDropDownViewResource（android.R.layout.simple_微调器_下拉项）；
类别.设置适配器（收入适配器）；
Intent objIntent=getIntent（）；
字符串incomeId=objIntent.getStringExtra（“incomeId”）；
查询值。put（“incomeId”，incomeId）；
queryValues.put（“incomeAmount”，amount.getText（）.toString（））；
queryValues.put（“incomePayer”，payer.getText（）.toString（））；
queryValues.put（“incomeDate”，dateView.getText（）.toString（））；
queryValues.put（“incomeCategory”，category.getSelectedItem（）.toString（））；
queryValues.put（“incomePayments”，payments.getSelectedItem（）.toString（））；
helper.updateIncome（查询值）；
此.callHomeActivity（视图）；
}
公共空间