Java Listview/arrayadapter事件错误

我正在android studio中进行一个项目，该项目有一个带有阵列适配器的列表。如果我单击一个列表项，您必须发送到车间页面，该页面显示车间的所有信息。我使用了一个SetonicClick监听器，但不知为什么它不起作用。它抛出了这个错误

尝试在com.example.jmuts.tikcitv2.scedule$1.onItemClick（scedule.java:68）*

我不知道如何解决这个问题，所以我现在陷入困境。我希望有人能帮助我

Schedule.java（这是包含单击事件的代码）

公共类scedule扩展AppCompative实现NavigationView.OnNavigationItemSelectedListener{
ListView lv；
阵列适配器；
字符串[]名称、开始、结束；
字符串eventName；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_schedule）；
Toolbar Toolbar=（Toolbar）findViewById（R.id.Toolbar）；
设置支持操作栏（工具栏）；
抽屉布局抽屉=（抽屉布局）findViewById（R.id.抽屉布局）；
ActionBarDrawerToggle切换=新建ActionBarDrawerToggle(
这，抽屉，工具栏，R.string.navigation\u drawer\u open，R.string.navigation\u drawer\u close）；
抽屉。添加抽屉链接器（切换）；
toggle.syncState（）；
NavigationView NavigationView=（NavigationView）findViewById（R.id.nav_视图）；
navigationView.setNavigationItemSelectedListener（此）；
lv=findViewById（R.id.listView）；
Bundle Bundle=getIntent（）.getExtras（）；
if（bundle！=null）{
eventName=bundle.getString（“eventName”）；
}
listner（事件名称）；
lv.setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父对象、视图、整型位置、长id）{
意向意向=新意向（scedule.this，workshop.class）；
intent.putExtra（“eventname”，lv.getItemAtPosition（position.toString（））；
星触觉（意向）；
}
});
}
@凌驾
public void onBackPressed（）{
抽屉布局抽屉=（抽屉布局）findViewById（R.id.抽屉布局）；
if（抽屉isDrawerOpen（重力压缩机启动））{
抽屉。关闭抽屉（重力压缩机启动）；
}否则{
super.onBackPressed（）；
}
}
@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.home，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）；
}
@SuppressWarnings（“StatementWithEmptyBody”）
@凌驾
公共布尔值onNavigationItemSelected（MenuItem项）{
//处理导航视图项单击此处。
int id=item.getItemId（）；
如果（id==R.id.nav_变化）{
意图c=新意图（scedule.this，MainActivity.class）；
c、 setFlags（Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK）；
星触觉（c）；
完成（）；
}else if（id==R.id.nav_home）{
完成（）；
}else if（id==R.id.nav_时间表）{
//意向意向=新意向（scedule.this，scedule.class）；
//intent.putExtra（“eventname”，eventname）；
//星触觉（意向）；
}else if（id==R.id.nav_map）{
意向意向=新意向（scedule.this，map.class）；
intent.putExtra（“eventname”，eventname）；
星触觉（意向）；
完成（）；
}else if（id==R.id.nav_常见问题）{
意图=新意图（scedule.this，faq.class）；
intent.putExtra（“eventname”，eventname）；
星触觉（意向）；
完成（）；
}
抽屉布局抽屉=（抽屉布局）findViewById（R.id.抽屉布局）；
抽屉。关闭抽屉（重力压缩机启动）；
返回true；
}
私有void列表器（字符串项）{
字符串getData=null；
字符串dbResult=“empty”；
dbConnect数据库=新的dbConnect（此）；
试一试{
日期c=Calendar.getInstance（）.getTime（）；
System.out.println（“当前时间=>”+c）；
SimpleDataFormat df=新SimpleDataFormat（“yyyy-MM-dd”）；
字符串formattedDate=df.format（c）；
String query=“从事件中选择c.workshopname、b.starttime、b.endtime作为内部联接，在a.eventid=b.eventid中选择b.eventid作为内部联接，在b.workshopid=c.workshopid中选择c.workshopid，其中b.workshopid=c.workshopid和b.eventid=（从事件中选择eventid，其中eventname='“+item+”）按b.starttime排序；”；
getData=“？query=“+urlcoder.encode（查询，“UTF-8”）；
//数据+=”&username=“+urlcoder.encode（用户名，“UTF-8”）；
字符串链接=”https://jackstest.000webhostapp.com/androiddbconnect.php“+getData；
dbResult=database.execute（link.get（）；
}
捕获（例外e）{
e、 printStackTrace（）；
}
试一试{
JSONArray ja=新的JSONArray（dbResult）；
JSONObject jo=null；
name=新字符串[ja.length（）]；
开始=新字符串[ja.length（）]；
end=新字符串[ja.length（）]；
对于（int i=0；ipublic class scedule extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

ListView lv;
ArrayAdapter<String> adapter;
String[] name, beginning, end;
String eventName;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scedule);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.addDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);

    lv = findViewById(R.id.listView);

    Bundle bundle = getIntent().getExtras();
    if (bundle != null) {
        eventName = bundle.getString("eventname");
    }

    listner(eventName);

    lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Intent intent = new Intent(scedule.this, workshop.class);
            intent.putExtra("eventname", lv.getItemAtPosition(position).toString());
            startActivity(intent);
        }
    });

}

@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

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

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    int id = item.getItemId();

    if (id == R.id.nav_Change) {
        Intent c = new Intent(scedule.this, MainActivity.class);
        c.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(c);
        finish();
    } else if (id == R.id.nav_home) {
        finish();
    } else if (id == R.id.nav_scedule) {
        //Intent intent = new Intent(scedule.this, scedule.class);
        //intent.putExtra("eventname", eventName);
        //startActivity(intent);
    } else if (id == R.id.nav_map) {
        Intent intent = new Intent(scedule.this, map.class);
        intent.putExtra("eventname", eventName);
        startActivity(intent);
        finish();
    } else if (id == R.id.nav_faq) {
        Intent intent = new Intent(scedule.this, faq.class);
        intent.putExtra("eventname", eventName);
        startActivity(intent);
        finish();
    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}


private void listner(String item){
    String getData = null;
    String dbResult = "empty";
    dbConnect database = new dbConnect(this);

    try {
        Date c = Calendar.getInstance().getTime();
        System.out.println("Current time => " + c);

        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
        String formattedDate = df.format(c);

        String query = "SELECT c.workshopname, b.starttime, b.endtime FROM events as a inner join scedules as b on a.eventid = b.eventid inner join workshops as c on b.workshopid = c.workshopid where b.workshopid = c.workshopid and b.eventid = (select eventid from events where eventname = '" + item + "') order by b.starttime;";
        getData = "?query=" + URLEncoder.encode(query, "UTF-8");
        //data += "&username=" + URLEncoder.encode(userName, "UTF-8");
        String link = "https://jackstest.000webhostapp.com/androiddbconnect.php" + getData;
        dbResult = database.execute(link).get();
    }
    catch (Exception e){
        e.printStackTrace();
    }

    try{
        JSONArray ja = new JSONArray(dbResult);
        JSONObject jo = null;
        name = new String[ja.length()];
        beginning = new String[ja.length()];
        end = new String[ja.length()];
        for(int i = 0; i < ja.length(); i++){
            jo = ja.getJSONObject(i);
            name[i] = jo.getString("workshopname");
            beginning[i] = "Start: " + jo.getString("starttime");
            end[i] = "end: " + jo.getString("endtime");
        }

        lv.setAdapter(new dataListAdapter(name, beginning, end));
    }
    catch (Exception e){
        e.printStackTrace();
    }
}

class dataListAdapter extends BaseAdapter {
    String[] name, beginning, end;

    dataListAdapter() {
        name = null;
        beginning = null;
        end = null;
    }

    public dataListAdapter(String[] text, String[] text1,String[] text3) {
        name = text;
        beginning = text1;
        end = text3;

    }

    public int getCount() {
        // TODO Auto-generated method stub
        return name.length;
    }

    public Object getItem(int arg0) {
        // TODO Auto-generated method stub
        return null;
    }

    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {

        LayoutInflater inflater = getLayoutInflater();
        View row;
        row = inflater.inflate(R.layout.list_view_scedule_layout, parent, false);
        TextView t1, t2, t3;
        t1 = (TextView) row.findViewById(R.id.list_item1);
        t2 = (TextView) row.findViewById(R.id.list_item2);
        t3 = (TextView) row.findViewById(R.id.list_item3);
        t1.setText(name[position]);
        t2.setText(beginning[position]);
        t3.setText(end[position]);

        return (row);
    }
}

public class workshop extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

String eventName;
TextView Header;
TextView Content;
TextView Time;
TextView Date;
TextView Location;
ImageView View;
ArrayAdapter<String> adapter;
String[] data;
String [] image;

private Bitmap bitmap;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_workshop);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.addDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);

    Header = (TextView) findViewById(R.id.header);
    Content = (TextView) findViewById(R.id.content);
    Time = (TextView) findViewById(R.id.start_end_time);
    Date = (TextView) findViewById(R.id.date);
    Location = (TextView) findViewById(R.id.location);
    View = (ImageView) findViewById(R.id.imageView3);

    Bundle bundle = getIntent().getExtras();
    if (bundle != null) {
        eventName = bundle.getString("eventname");
    }

    GetInfo(eventName);

}

private void GetInfo(String eventName) {
    String GetInfo = null;
    String dbResult = "empty";
    dbConnect database = new dbConnect(this);

    try{
        String query = "";
        GetInfo = "?query=" + URLEncoder.encode(query, "UTF-8");
        String link = "https://jackstest.000webhostapp.com/androiddbconnect.php" + GetInfo;
        dbResult = database.execute(link).get();
    }
    catch(Exception e){
        Header.setText("Workshop");
    }

    try{
        JSONArray ja = new JSONArray(dbResult);
        JSONObject jo = null;
        data = new String[ja.length()];
        image = new String[ja.length()];

        for (int i = 0;i < 1 ; i++){
            jo = ja.getJSONObject(i);
            data[i] = jo.getString("workshopname");
            image[i] = jo.getString("imagelink");


        }

        bitmap = getBitmapFromURL(image[0]);
        View.setImageBitmap(bitmap);

        Header.setText(data[0]);


    }
    catch(Exception e){
        e.printStackTrace();
    }
}

private Bitmap getBitmapFromURL(String src) {
    try {
        URL url = new URL(src);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        InputStream input = connection.getInputStream();
        Bitmap myBitmap = BitmapFactory.decodeStream(input);
        return myBitmap;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

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

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    int id = item.getItemId();

    if (id == R.id.nav_Change) {
        Intent c = new Intent(workshop.this, MainActivity.class);
        c.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(c);
        finish();
    } else if (id == R.id.nav_home) {
        finish();
    } else if (id == R.id.nav_scedule) {
        Intent intent = new Intent(workshop.this, scedule.class);
        intent.putExtra("eventname", eventName);
        startActivity(intent);
        finish();
    } else if (id == R.id.nav_map) {
        Intent intent = new Intent(workshop.this, map.class);
        intent.putExtra("eventname", eventName);
        startActivity(intent);
        finish();
    } else if (id == R.id.nav_faq) {
        Intent intent = new Intent(workshop.this, faq.class);
        intent.putExtra("eventname", eventName);
        startActivity(intent);
        finish();
    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}
 }

public Object getItem(int arg0) {
    // TODO Auto-generated method stub
    return null;
}

public Object getItem(int arg0) {
    // TODO Auto-generated method stub
    return myDataObjectArray[arg0];
}