Я хочу использовать представление списка с помощью адаптера пользовательского списка. Моя проблема в том, что я не получаю просмотр списка во время выполнения приложения.ListView с помощью пользовательского адаптера просмотра списка
CourseActivity.java
package com.technerdshub.vusocial.Activities;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.Toast;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.SaveCallback;
import com.technerdshub.vusocial.DBHelper;
import com.technerdshub.vusocial.Models.Course;
import com.technerdshub.vusocial.Models.StudyProgramModel;
import com.technerdshub.vusocial.Models.User;
import com.technerdshub.vusocial.R;
import java.util.ArrayList;
import java.util.List;
public class CourseActivity extends AppCompatActivity {
ListView list;
ArrayList arrayList = new ArrayList();
CourseViewAdapter adapter;
Course courseObject;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.course_activity);
List<Course> courseList;
DBHelper db = new DBHelper(this);
courseList = db.getAllCourses();
list = (ListView) findViewById(R.id.listview1);
for (Course c : courseList)
{
arrayList.add(c);
}
adapter = new CourseViewAdapter(this, arrayList);
adapter.courseActivity = this;
list.setAdapter(adapter);
User user = User.getInstance();
saveUserOnParse(user);
}
private void saveUserOnParse(User user) {
ParseObject parseUser = new ParseObject("UserData");
parseUser.put("name", user.getName());
parseUser.put("vuId", user.getVuId());
parseUser.put("studyProgram", user.getStudyProgram());
parseUser.put("facebookId", user.getFacebookId());
parseUser.put("facebookEmail", user.getFacebookEmail());
parseUser.saveInBackground(new SaveCallback() {
@Override
public void done(ParseException e) {
if (e==null){
// Intent i = new Intent(getContext(), StudentDashboardActivity.class);
//// i.putExtra("E-mail", "abc");
// startActivity(i);
}
else {
Toast temp = Toast.makeText(CourseActivity.this,"Data is not saved.", Toast.LENGTH_SHORT);
temp.show();
}
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
// check if the request code is same as what is passed here it is 4
if(requestCode==2)
{
courseObject = (Course) data.getExtras().getSerializable("SelectedCourse");
}
}
}
CourseViewAdapter.java
package com.technerdshub.vusocial.Activities;
import android.content.Context;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import com.technerdshub.vusocial.Models.Course;
import com.technerdshub.vusocial.Models.StudyProgramModel;
import com.technerdshub.vusocial.R;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
/**
* Created by Saroosh on 7/16/2016.
*/
public class CourseViewAdapter extends BaseAdapter {
protected CourseActivity courseActivity;
Context mContext;
LayoutInflater inflater;
private List<Course>worldpopulationlist=null;
private ArrayList<Course> arraylist;
public CourseViewAdapter(Context context, List<Course>worldpopulationlist){
mContext = context;
this.worldpopulationlist = worldpopulationlist;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<Course>();
this.arraylist.addAll(worldpopulationlist);
}
public class ViewHolder {
TextView courseCode;
TextView courseName;
}
@Override
public int getCount() {
return 0;
}
@Override
public Course getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.c_list_item, null);
// Locate the TextViews in listview_item.xml
holder.courseName = (TextView) view.findViewById(R.id.course_name);
holder.courseCode = (TextView) view.findViewById(R.id.course_code);
// holder.duration = (TextView) view.findViewById(R.id.program_duration);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Set the results into TextViews
holder.courseName.setText(worldpopulationlist.get(position).getCourseName());
holder.courseCode.setText(worldpopulationlist.get(position).getCourseCode());
//holder.duration.setText(worldpopulationlist.get(position).getDuration());
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Send single item click data to SingleItemView Class
Intent intent = new Intent(mContext, CourseActivity.class);
// Pass all data ran
intent.putExtra("SelectedCourse", worldpopulationlist.get(position));
// Pass all data country
courseActivity.setResult(2,intent);
courseActivity.finish();
}
});
return view;
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
worldpopulationlist.clear();
if (charText.length() == 0) {
worldpopulationlist.addAll(arraylist);
}
else
{
for (Course wp : arraylist)
{
if (wp.getCourseName().toLowerCase(Locale.getDefault()).contains(charText))
{
worldpopulationlist.add(wp);
}
}
}
notifyDataSetChanged();
}
}
course_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Activities.CourseActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<include
android:id="@+id/my_tool_bar"
layout="@layout/tool_bar"
>
</include>
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_c" />
</android.support.design.widget.CoordinatorLayout>
c_list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingLeft="4dp"
android:paddingRight="4dp"
>
<TextView
android:id="@+id/course_code"
android:layout_width="70dp"
android:layout_height="70dp"
android:paddingTop="10dp"
android:paddingLeft="10dp"
android:paddingRight="10dp" />
<TextView
android:id="@+id/course_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_toRightOf="@+id/course_code"
android:paddingBottom="5dp"
android:textColor="#FFFFFF"
android:textSize="15sp" />
</RelativeLayout>
Вы получаете ошибку в LogCat? После? – vinoth12594
Когда вы уже создали courselist, то почему вы создаете из него еще один список? –