открывайте новую активность каждый раз, когда элемент нажимается на дочерний список

Question

Привет, я действительно новичок в этом. У меня есть код для расширяемого списка. при нажатии на дочерние элементы он просто отображает тост того же текста. Я хочу открыть новое действие, когда мы нажимаем на любой дочерний элемент. Любая помощь будет высоко ценится.

MyExpandableAdapter 
 

 
public class MyExpandableAdapter extends BaseExpandableListAdapter{ 
 
\t 
 
\t private Activity activity; 
 
\t  private ArrayList<Object> childtems; 
 
\t  private LayoutInflater inflater; 
 
\t  private ArrayList<String> parentItems, child; 
 

 
\t  // constructor 
 
\t  public MyExpandableAdapter(ArrayList<String> parents, ArrayList<Object> childern) 
 
\t  { 
 
\t   this.parentItems = parents; 
 
\t   this.childtems = childern; 
 
\t  } 
 

 
\t  public void setInflater(LayoutInflater inflater, Activity activity) 
 
\t  { 
 
\t   this.inflater = inflater; 
 
\t   this.activity = activity; 
 
\t  } 
 
\t  
 
\t  // method getChildView is called automatically for each child view. 
 
\t  // Implement this method as per your requirement 
 
\t  @Override 
 
\t  public View getChildView(int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) 
 
\t  { 
 

 
\t   child = (ArrayList<String>) childtems.get(groupPosition); 
 

 
\t   TextView textView = null; 
 

 
\t   if (convertView == null) { 
 
\t    convertView = inflater.inflate(R.layout.child_view, null); 
 
\t   } 
 
\t  
 
\t   // get the textView reference and set the value 
 
\t   textView = (TextView) convertView.findViewById(R.id.textViewChild); 
 
\t   textView.setText(child.get(childPosition)); 
 

 
\t   // set the ClickListener to handle the click event on child item 
 
\t   convertView.setOnClickListener(new OnClickListener() { 
 

 
\t    @Override 
 
\t    public void onClick(View view) { 
 
\t     Toast.makeText(activity, child.get(childPosition), 
 
\t       Toast.LENGTH_SHORT).show(); 
 
\t    } 
 
\t   }); 
 
\t   return convertView; 
 
\t  } 
 

 
\t  // method getGroupView is called automatically for each parent item 
 
\t  // Implement this method as per your requirement 
 
\t  @Override 
 
\t  public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) 
 
\t  { 
 

 
\t   if (convertView == null) { 
 
\t    convertView = inflater.inflate(R.layout.parent_view, null); 
 
\t   } 
 

 
\t   ((CheckedTextView) convertView).setText(parentItems.get(groupPosition)); 
 
\t   ((CheckedTextView) convertView).setChecked(isExpanded); 
 

 
\t   return convertView; 
 
\t  } 
 

 
\t  @Override 
 
\t  public Object getChild(int groupPosition, int childPosition) 
 
\t  { 
 
\t   return null; 
 
\t  } 
 

 
\t  @Override 
 
\t  public long getChildId(int groupPosition, int childPosition) 
 
\t  { 
 
\t   return 0; 
 
\t  } 
 

 
\t  @Override 
 
\t  public int getChildrenCount(int groupPosition) 
 
\t  { 
 
\t   return ((ArrayList<String>) childtems.get(groupPosition)).size(); 
 
\t  } 
 

 
\t  @Override 
 
\t  public Object getGroup(int groupPosition) 
 
\t  { 
 
\t   return null; 
 
\t  } 
 

 
\t  @Override 
 
\t  public int getGroupCount() 
 
\t  { 
 
\t   return parentItems.size(); 
 
\t  } 
 

 
\t  @Override 
 
\t  public void onGroupCollapsed(int groupPosition) 
 
\t  { 
 
\t   super.onGroupCollapsed(groupPosition); 
 
\t  } 
 

 
\t  @Override 
 
\t  public void onGroupExpanded(int groupPosition) 
 
\t  { 
 
\t   super.onGroupExpanded(groupPosition); 
 
\t  } 
 

 
\t  @Override 
 
\t  public long getGroupId(int groupPosition) 
 
\t  { 
 
\t   return 0; 
 
\t  } 
 

 
\t  @Override 
 
\t  public boolean hasStableIds() 
 
\t  { 
 
\t   return false; 
 
\t  } 
 

 
\t  @Override 
 
\t  public boolean isChildSelectable(int groupPosition, int childPosition) 
 
\t  { 
 
\t   return false; 
 
\t  } 
 

 
}

Main Activity 
 

 
public class MainActivity extends ExpandableListActivity{ 
 
\t 
 
\t // Create ArrayList to hold parent Items and Child Items 
 
    private ArrayList<String> parentItems = new ArrayList<String>(); 
 
    private ArrayList<Object> childItems = new ArrayList<Object>(); 
 

 
    @Override 
 
    public void onCreate(Bundle savedInstanceState) 
 
    { 
 

 
     super.onCreate(savedInstanceState); 
 

 
     
 
     // Create Expandable List and set it's properties 
 
     ExpandableListView expandableList = getExpandableListView(); 
 
     expandableList.setDividerHeight(2); 
 
     expandableList.setGroupIndicator(null); 
 
     expandableList.setClickable(true); 
 

 
     // Set the Items of Parent 
 
     setGroupParents(); 
 
     // Set The Child Data 
 
     setChildData(); 
 

 
     // Create the Adapter 
 
     MyExpandableAdapter adapter = new MyExpandableAdapter(parentItems, childItems); 
 

 
     adapter.setInflater((LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE), this); 
 
     
 
     // Set the Adapter to expandableList 
 
     expandableList.setAdapter(adapter); 
 
     expandableList.setOnChildClickListener(this); 
 
    } 
 

 
    // method to add parent Items 
 
    public void setGroupParents() 
 
    { 
 
     parentItems.add("Company"); 
 
     parentItems.add("Pricing & Plans"); 
 
     parentItems.add("Services"); 
 
     parentItems.add("Careers"); 
 
     parentItems.add("Clients"); 
 
     parentItems.add("Contact Us"); 
 
    } 
 

 
    // method to set child data of each parent 
 
    public void setChildData() 
 
    { 
 

 
     // Add Child Items for Company 
 
     ArrayList<String> child = new ArrayList<String>(); 
 
     child.add("Who We Are"); 
 
     child.add("Advantage @ KDIPL"); 
 
     child.add("Team"); 
 
     
 
     
 
     childItems.add(child); 
 

 
     // Add Child Items for Pricing & Plans 
 
     child = new ArrayList<String>(); 
 
     child.add("SEO Packages"); 
 
     child.add("SMO Packages"); 
 
     child.add("PPC Packages"); 
 
     child.add("Web Design Packages"); 
 
     child.add("Web Development Packages"); 
 
     child.add("Email Marketing Packages"); 
 
     child.add("Bulk SMS Packages"); 
 
     
 
     childItems.add(child); 
 

 
     // Add Child Items for Services 
 
     child = new ArrayList<String>(); 
 
     
 
     child.add("SMO Services"); 
 
     child.add("PPC Services"); 
 
     child.add("Web Design Services"); 
 
     child.add("Web Development Services"); 
 
     child.add("SEO Services"); 
 
     
 
     childItems.add(child); 
 

 
     // Add Child Items for Careers 
 
     child = new ArrayList<String>(); 
 
     child.add("Career with Us"); 
 
     child.add("Current Openings"); 
 
     child.add("Recruitment Process"); 
 
     
 
     childItems.add(child); 
 
     
 
    // Add Child Items for Clients 
 
     child = new ArrayList<String>(); 
 
     child.add("Testimonials"); 
 
     child.add("SEO Results"); 
 
     child.add("PPC Results"); 
 
     child.add("Portfolio"); 
 
     
 
     childItems.add(child); 
 
     
 
    // Add Child Items for Contact Us 
 
     child = new ArrayList<String>(); 
 
     child.add("Location"); 
 
     child.add("Request a Quote"); 
 
     child.add("Feedback"); 
 
     
 
     childItems.add(child); 
 
     
 
     
 
    } 
 
    
 
    
 
\t 
 
\t 
 
}

Answer 1

Вы можете написать этот

convertView.setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View view) { 
        Intent intent= new Intent(context, MainActivity.class); 
        context.startActivity(intent); 
       } 
      }); 

Вместо этого

convertView.setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View view) { 
        Toast.makeText(activity, child.get(childPosition), 
          Toast.LENGTH_SHORT).show(); 
       } 
      }); 

И сделать один конструктор в адаптере как этот

private Context context; 
public MyExpandableAdapter (Context context) { 
       this.context = context;  
     } 

Answer 2

в вас активности добавить

  // Listview on child click listener 
      expandableList.setOnChildClickListener(new OnChildClickListener() { 

       @Override 
       public boolean onChildClick(ExpandableListView parent, View v, 
         int groupPosition, int childPosition, long id) { 
        Toast.makeText(
          getApplicationContext(),groupPosition+ " group "+childPosition+" is clicked", Toast.LENGTH_SHORT) 
          .show(); 

        Intent in = new Intent(Class_Name.this, JUMP_Class.class); 
        startActivity(in); 
        return false; 
       } 
      });