Question

MY ADAPTER
public class ExpandableListAdapter extends BaseExpandableListAdapter {

	private Context _context;
	private List<String> _listDataHeader; // header titles
	// child data in format of header title, child title
	private HashMap<String, List<String>> _listDataChild;
	
	


		
	public ExpandableListAdapter(Context context, List<String> listDataHeader,
			HashMap<String, List<String>> listChildData) {
		this._context = context;
		this._listDataHeader = listDataHeader;
		this._listDataChild = listChildData;
		
		
		
		
	}

	@Override
	public Object getChild(int groupPosition, int childPosititon) {
		return this._listDataChild.get(this._listDataHeader.get(groupPosition))
				.get(childPosititon);
	}

	
				
				
	
	@Override
	public long getChildId(int groupPosition, int childPosition) {
		return childPosition;
	}

	@Override
	public View getChildView(int groupPosition, final int childPosition,
			boolean isLastChild, View convertView, ViewGroup parent) {

		final String childText = (String) getChild(groupPosition, childPosition);
		
		
		

		
		if (convertView == null) {
			LayoutInflater infalInflater = (LayoutInflater) this._context
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
			convertView = infalInflater.inflate(R.layout.list_item, null);
		}
		
		
		
		

		
		TextView txtListChild = (TextView) convertView
				.findViewById(R.id.lblListItem);

		txtListChild.setText(childText);
		
		
		
				
	
		return convertView;
	}

	
	@Override
	public int getChildrenCount(int groupPosition) {
		return this._listDataChild.get(this._listDataHeader.get(groupPosition))
				.size();
	}

	@Override
	public Object getGroup(int groupPosition) {
		return this._listDataHeader.get(groupPosition);
	}

	@Override
	public int getGroupCount() {
		return this._listDataHeader.size();
	}

	@Override
	public long getGroupId(int groupPosition) {
		return groupPosition;
	}

	@Override
	public View getGroupView(final int groupPosition, boolean isExpanded,
			View convertView, ViewGroup parent) {
		String headerTitle = (String) getGroup(groupPosition);
		
		if (convertView == null) {
			LayoutInflater infalInflater = (LayoutInflater) this._context
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
			convertView = infalInflater.inflate(R.layout.list_group, null);
		}

		TextView lblListHeader = (TextView) convertView
				.findViewById(R.id.lblListHeader);
	
		
		
		
		lblListHeader.setTypeface(null, Typeface.BOLD);
		lblListHeader.setText(headerTitle);

		
		return convertView;
	}

	@Override
	public boolean hasStableIds() {
		return false;
	}

	@Override
	public boolean isChildSelectable(int groupPosition, int childPosition) {
		return true;
	}
	
}

MY ACTIVITY CODE
public class MainActivity extends Activity {

	ExpandableListAdapter listAdapter;
	ExpandableListView expListView;
	List<String> listDataHeader;
	HashMap<String, List<String>> listDataChild;
	PopupWindow popUp;
	Dialog picker;
	Button edit;
	Button set;
	TimePicker timep;
	Integer hour;
	TextView time;
	Context context;
	

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.expendable);
		
		// get the listview
		expListView = (ExpandableListView) findViewById(R.id.lvExp);

		// preparing list data
		prepareListData();

		listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);

		// setting list adapter
		expListView.setAdapter(listAdapter);

		// Listview Group click listener
		expListView.setOnGroupClickListener(new OnGroupClickListener() {

			@Override
			public boolean onGroupClick(ExpandableListView parent, View v,
					int groupPosition, long id) {
				// Toast.makeText(getApplicationContext(),
				// "Group Clicked " + listDataHeader.get(groupPosition),
				// Toast.LENGTH_SHORT).show();
				return false;
			}
		});
		

	        
		
	
		// Listview Group expanded listener
		expListView.setOnGroupExpandListener(new OnGroupExpandListener() {

			@Override
			public void onGroupExpand(int groupPosition) {
				Toast.makeText(getApplicationContext(),
						listDataHeader.get(groupPosition) + " Expanded",
						Toast.LENGTH_SHORT).show();
			}
		});

		// Listview Group collasped listener
		expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() {

			@Override
			public void onGroupCollapse(int groupPosition) {
				Toast.makeText(getApplicationContext(),
						listDataHeader.get(groupPosition) + " Collapsed",
						Toast.LENGTH_SHORT).show();

			}
		});
		
		// Listview on child click listener
		expListView.setOnChildClickListener(new OnChildClickListener() {

			@Override
			public boolean onChildClick(ExpandableListView parent, View v,
					int groupPosition, int childPosition, long id) {
				// TODO Auto-generated method stub
				
				
				Toast.makeText(
						getApplicationContext(),
						listDataHeader.get(groupPosition)
								+ " : "
								+ listDataChild.get(
										listDataHeader.get(groupPosition)).get(
										childPosition), Toast.LENGTH_SHORT)
						.show();
				
				
			
				
				
				Intent child0Intent = new Intent(getApplication(), Picktime.class);
				startActivity(child0Intent);
				return false;
				
			}
		});
		
		

			
			
			

			
			
		
		
		
	
	}

	/*
	 * Preparing the list data
	 */
	private void prepareListData() {
		listDataHeader = new ArrayList<String>();
		listDataChild = new HashMap<String, List<String>>();
		

		// Adding child data
		listDataHeader.add("Light");
		listDataHeader.add("Television");
		listDataHeader.add("Computer");
		listDataHeader.add("Fan");
		listDataHeader.add("Aircondition");
		listDataHeader.add("Oven");
		listDataHeader.add("Refridgerator");
		listDataHeader.add("WaterHeater");

		// Adding child data
		List<String> Light = new ArrayList<String>();
		Light.add("Power:14w/hr");
		
	
		List<String> Television = new ArrayList<String>();
		Television.add("Power:0.03w/hr");

		List<String> Computer = new ArrayList<String>();
		Computer.add("Power:100w/hr");
		

		List<String> Fan = new ArrayList<String>();
		Fan.add("Power:75w/hr");

		List<String> Aircondition = new ArrayList<String>();
		Aircondition.add("Power:1000w/hr");
		
		List<String> Oven = new ArrayList<String>();
		Oven.add("Power:2400w/hr");
		
		List<String> Refridgerator = new ArrayList<String>();
		Refridgerator.add("Power:180w/hr");
		
		List<String> WaterHeater = new ArrayList<String>();
		WaterHeater.add("Power:4000w/hr");

		listDataChild.put(listDataHeader.get(0), Light); // Header, Child data
		listDataChild.put(listDataHeader.get(1), Television);
		listDataChild.put(listDataHeader.get(2), Computer);
		listDataChild.put(listDataHeader.get(3), Fan);
		listDataChild.put(listDataHeader.get(5), Aircondition);
		listDataChild.put(listDataHeader.get(6), Oven);
		listDataChild.put(listDataHeader.get(7), Refridgerator);
		listDataChild.put(listDataHeader.get(7), WaterHeater);
		
		

		
		        
	
		
			
	
		
		
		
		
	}
}

MY NumerPicker CODE

public class Picktime extends MainActivity {
	NumberPicker np;
	TextView tv1;
	Button btn;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.picker_frag);
        
        np = (NumberPicker) findViewById(R.id.timePicker);
        tv1 = (TextView) findViewById(R.id.editText);
        btn = (Button) findViewById(R.id.btnSet);
        
        
        np.setMinValue(1);
        np.setMaxValue(100);
        np.setWrapSelectorWheel(false); 
        
       
       
    
		np.setOnValueChangedListener(new OnValueChangeListener(){	
		@Override
		public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
			// TODO Auto-generated method stub
			tv1.setText("Hr Used:" + ( np.getValue()));
		}
	});



I TRIED TO DO A GET INTENT BUT I HAVE NO IDEA WHERE TO DO I INPUT IT IN

				 btn.setOnClickListener(new View.OnClickListener() {

	            public void onClick(View arg0) {
	            	NumberPicker numPicker = (NumberPicker)findViewById(R.id.timePicker);
	               int x = numPicker.getValue();
	                Intent i = new Intent( Picktime.this,
	                		MainActivity.class);
	                
	                i.putExtra("Value", x);
	                
	               
	                startActivity(i);
	            }
	        });
    }
 

   
}

Answer 1

在onCreate方法之后将其插入MainActivity Class：

首先，使用getIntent（）方法获取已开始活动的意图：

Intent intent = getIntent();

如果您的额外数据表示为字符串，则可以使用intent.getStringExtra（String name）方法。在你的情况下：它是int，所以使用

Integer in = intent.getIntExtra("Value",defaultValue);

defaultvalue是整数。

如何从另一个Activity中的NumberPicker获取值，以便在我的textView中显示在consumeablelistview子项中

1 个答案: