小白一只不知道哪里错了

public class MainActivity extends AppCompatActivity  {

    private ListView listView;
    private SimpleAdapter simpleAdapter;
    private List<Map<String,Object>> personinfo;
    Test test;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        test = new Test(this);

        listView = (ListView) findViewById(R.id.list);
        personinfo=new ArrayList<Map<String,Object>>();
        simpleAdapter = new SimpleAdapter(this, getpersoninfo(), R.layout.item, new String[]{"pic", "text","age","sex"},
                new int[]{R.id.pic, R.id.word,R.id.age,R.id.sex});

        listView.setAdapter(simpleAdapter);
    }

    public Person[] getperson() {
        Person[] persons=new Person[100];
        int i=0;
        SQLiteDatabase db=test.getReadableDatabase();
        Cursor cursor=db.rawQuery("select * from info",null);
        if(cursor!=null&&cursor.getCount()>0){
            while (cursor.moveToNext()){
                Person person=new Person();
                person.setName(cursor.getString(1));
                person.setSex(cursor.getString(2));
                person.setAge(cursor.getString(3));
                person.setImage(cursor.getString(4));
                persons[i]=person;
                i++;
            }
        }
        cursor.close();
        test.close();
        return persons;
    }

    public List<Map<String,Object>> getpersoninfo(){
        Person[] persons=getperson();
        for(int i=0;i<persons.length;i++){
            Map<String,Object> map=new HashMap<String, Object>();
            map.put("pic",persons[i].image);
            map.put("text",persons[i].name);
            map.put("age",persons[i].age);
            map.put("sex",persons[i].sex);
            personinfo.add(map);
        }
        return personinfo;
    }
 }

报错：

FATAL EXCEPTION: main

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.fans.listview/com.example.fans.listview.MainActivity}: java.lang.NullPointerException

at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2204)

at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2254)

at android.app.ActivityThread.access$600(ActivityThread.java:141)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)

at android.os.Handler.dispatchMessage(Handler.java:99)

at android.os.Looper.loop(Looper.java:137)

at android.app.ActivityThread.main(ActivityThread.java:5069)

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:793)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)

at dalvik.system.NativeStart.main(Native Method)

Caused by: java.lang.NullPointerException

at com.example.fans.listview.MainActivity.getpersoninfo(MainActivity.java:60)

at com.example.fans.listview.MainActivity.onCreate(MainActivity.java:29)

at android.app.Activity.performCreate(Activity.java:5104)

at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1092)

at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)