android.widget.ExpandableListView#setEmptyView ( )源码实例Demo

/**
 * Updates the screen state (current list and other views) when the
 * content changes.
 * 
 * @see Activity#onContentChanged()
 */
@Override
public void onContentChanged() {
    super.onContentChanged();
    View emptyView = findViewById(com.android.internal.R.id.empty);
    mList = (ExpandableListView)findViewById(com.android.internal.R.id.list);
    if (mList == null) {
        throw new RuntimeException(
                "Your content must have a ExpandableListView whose id attribute is " +
                "'android.R.id.list'");
    }
    if (emptyView != null) {
        mList.setEmptyView(emptyView);
    }
    mList.setOnChildClickListener(this);
    mList.setOnGroupExpandListener(this);
    mList.setOnGroupCollapseListener(this);
    
    if (mFinishedStart) {
        setListAdapter(mAdapter);
    }
    mFinishedStart = true;
}
 

private void initViews() {
	mNavigationIndex = getIntent()
			.getIntExtra(EXTRA_PRE_LOAD_DATA_INDEX, 0);
	llytOperate = (LinearLayout) findViewById(R.id.operate);
	btnCancel = (Button) findViewById(R.id.cancel);
	btnCancel.setOnClickListener(this);
	btnPay = (Button) findViewById(R.id.pay);
	btnPay.setOnClickListener(this);
	tvEmptyView = (TextView) findViewById(R.id.emptyView);
	lvOrders = (ExpandableListView) findViewById(R.id.orders);

	lvOrders.setEmptyView(tvEmptyView);
	LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
	View footerView = inflater.inflate(R.layout.fv_a6_order, null);
	lvOrders.addFooterView(footerView);
	mAdapter = new A6OrderExpandableAdapter(this, mLstODBInfos);
	lvOrders.setAdapter(mAdapter);

	// btnPay.setEnabled(false);
	setPanelGone(true);
}
 

protected void showNoResultsFoundView(final String emptyMsg) {
	if (parentView == null || TextUtils.isEmpty(emptyMsg)) return;
	
	ExpandableListView lv = (ExpandableListView)parentView.findViewById(R.id.channelListView);
	View emptyView = parentView.findViewById(R.id.channelListEmpty);
	if (lv != null && emptyView != null) {
		TextView tv = (TextView)emptyView.findViewById(R.id.results_not_found);
		tv.setText(emptyMsg);
		
		lv.setEmptyView(emptyView);
	}
	
	View progressView = parentView.findViewById(R.id.channelListProgress);
	if (progressView != null) {
		progressView.setVisibility(View.GONE);
	}
	
}
 

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
		Bundle savedInstanceState) {
	View view = inflater.inflate(R.layout.channel_list, container, false);
	
	OnChildClickListener channelItemListener = new OnChildClickListener() {
		@Override
		public boolean onChildClick(ExpandableListView parent, View v,
				int groupPosition, int childPosition, long id) {
			JSONObject channelItem = (JSONObject) adapter.getChild(groupPosition, childPosition);
			channelSelected(channelItem);
			return true;
		}
	};
	
	ExpandableListView channelsView = (ExpandableListView) view.findViewById(R.id.channelListView);
	channelsView.setEmptyView(view.findViewById(R.id.channelListProgress));
	channelsView.setAdapter(adapter);
	channelsView.setOnChildClickListener(channelItemListener);
	
	PauseOnScrollListener listener = new PauseOnScrollListener(ImageLoader.getInstance(), true, true);
	channelsView.setOnScrollListener(listener);
	expandAll(view);
	
	return view;
}
 

/**
 * Makes an empty ListView and returns it.
 *
 * @return ListView
 */
private void _initListView() {
    expandableListView = (ExpandableListView) findViewById(R.id.listView);
    expandableListView.setTextFilterEnabled(true);
    expandableListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
    expandableListView.setEmptyView(findViewById(android.R.id.empty));

    // Set the data
    setAdapter();

    // events
    this._setListViewEvents();

    adapter.notifyDataSetChanged();
}
 

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.device_services_activity);

    gattServicesList = (ExpandableListView) findViewById(R.id.gatt_services_list);
    gattServicesList.setOnChildClickListener(this);
    final View emptyView = findViewById(R.id.empty_view);
    gattServicesList.setEmptyView(emptyView);

    dataCharacteristic = (TextView) findViewById(R.id.data_characteristic_uuid);
    dataValue = (TextView) findViewById(R.id.data_characteristic_value);

    //noinspection ConstantConditions
    final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    final ActionBar actionBar = getSupportActionBar();
    final String deviceName = getDeviceName();
    if (TextUtils.isEmpty(deviceName)) {
        //noinspection ConstantConditions
        actionBar.setTitle(getDeviceAddress());
    } else {
        //noinspection ConstantConditions
        actionBar.setTitle(deviceName);
        actionBar.setSubtitle(getDeviceAddress());
    }
    actionBar.setDisplayHomeAsUpEnabled(true);
}
 

private void setLoading(final Context context) {
	ProgressBar progressBar = (ProgressBar)view.findViewById(R.id.channelListProgress);
	ExpandableListView elv = (ExpandableListView)view.findViewById(R.id.channelListView);
	View noResultsFound = view.findViewById(R.id.channelListEmpty);
	
	if (elv != null) {
		progressBar.setVisibility(View.VISIBLE);
		elv.setEmptyView(progressBar);
		
		if (noResultsFound != null) {
			noResultsFound.setVisibility(View.GONE);
		}
	}
}
 

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
	View view = super.onCreateView(inflater, container, savedInstanceState);
	final View emptyView = View.inflate(container.getContext(), R.layout.list_empty_view, null);
	final ExpandableListView channelsView = (ExpandableListView) view.findViewById(R.id.channelListView);
	channelsView.setEmptyView(emptyView);
	view.findViewById(R.id.channelListProgress).setVisibility(View.GONE);
	adapter.configure(genericChannelFrag, view);
	return view;
}