Java ListView.getCount方法代码示例

import android.widget.ListView; //导入方法依赖的package包/类
private void actionModeDialpad() {
    
    ListView lv = getListView();

    for(int i = 0; i < lv.getCount(); i++) {
        if(lv.isItemChecked(i)) {
            mAdapter.getItem(i);
            String number = mAdapter.getCallRemoteAtPostion(i);
            if(!TextUtils.isEmpty(number)) {
                Intent it = new Intent(Intent.ACTION_DIAL);
                it.setData(SipUri.forgeSipUri(SipManager.PROTOCOL_SIP, number));
                startActivity(it);
            }
            break;
        }
    }
    mMode.invalidate();
    
}
 

import android.widget.ListView; //导入方法依赖的package包/类
private void actionModeDelete() {
    ListView lv = getListView();
    
    ArrayList<Long> checkedIds = new ArrayList<Long>();
    
    for(int i = 0; i < lv.getCount(); i++) {
        if(lv.isItemChecked(i)) {
            long[] selectedIds = mAdapter.getCallIdsAtPosition(i);
            
            for(long id : selectedIds) {
                checkedIds.add(id);
            }
            
        }
    }
    if(checkedIds.size() > 0) {
        String strCheckedIds = TextUtils.join(", ", checkedIds);
        Log.d(THIS_FILE, "Checked positions ("+ strCheckedIds +")");
        getActivity().getContentResolver().delete(SipManager.CALLLOG_URI, Calls._ID + " IN ("+strCheckedIds+")", null);
        mMode.finish();
    }
}
 

import android.widget.ListView; //导入方法依赖的package包/类
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    // Shortcuts that work no matter what is selected
    if (QMail.useVolumeKeysForListNavigationEnabled() &&
            (keyCode == KeyEvent.KEYCODE_VOLUME_UP ||
            keyCode == KeyEvent.KEYCODE_VOLUME_DOWN)) {

        final ListView listView = getListView();

        int currentPosition = listView.getSelectedItemPosition();
        if (currentPosition == AdapterView.INVALID_POSITION || listView.isInTouchMode()) {
            currentPosition = listView.getFirstVisiblePosition();
        }

        if (keyCode == KeyEvent.KEYCODE_VOLUME_UP && currentPosition > 0) {
            listView.setSelection(currentPosition - 1);
        } else if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN &&
                currentPosition < listView.getCount()) {
            listView.setSelection(currentPosition + 1);
        }

        return true;
    }

    return super.onKeyDown(keyCode, event);
}
 

import android.widget.ListView; //导入方法依赖的package包/类
private static List<MusicDirectory.Entry> getSelectedSongs(ListView albumListView)
{
	List<MusicDirectory.Entry> songs = new ArrayList<MusicDirectory.Entry>(10);

	if (albumListView != null)
	{
		int count = albumListView.getCount();
		for (int i = 0; i < count; i++)
		{
			if (albumListView.isItemChecked(i))
			{
				songs.add((MusicDirectory.Entry) albumListView.getItemAtPosition(i));
			}
		}
	}

	return songs;
}
 

import android.widget.ListView; //导入方法依赖的package包/类
public boolean canTargetScrollVertically(int direction) {
    ListView target = this.mTarget;
    int itemCount = target.getCount();
    if (itemCount == 0) {
        return false;
    }
    int childCount = target.getChildCount();
    int firstPosition = target.getFirstVisiblePosition();
    int lastPosition = firstPosition + childCount;
    if (direction > 0) {
        if (lastPosition >= itemCount && target.getChildAt(childCount - 1).getBottom() <= target.getHeight()) {
            return false;
        }
    } else if (direction >= 0) {
        return false;
    } else {
        if (firstPosition <= 0 && target.getChildAt(0).getTop() >= 0) {
            return false;
        }
    }
    return true;
}
 

import android.widget.ListView; //导入方法依赖的package包/类
@Override
public void onLoadFinished(final Loader<Cursor> loader, final Cursor data) {
	// Here we have to restore the old saved scroll position, or scroll to the bottom if before adding new events it was scrolled to the bottom.  
	final ListView list = getListView();
	final int position = mLogScrollPosition;
	final boolean scrolledToBottom = position == LOG_SCROLLED_TO_BOTTOM || (list.getCount() > 0 && list.getLastVisiblePosition() == list.getCount() - 1);

	mLogAdapter.swapCursor(data);

	if (position > LOG_SCROLL_NULL) {
		list.setSelectionFromTop(position, 0);
	} else {
		if (scrolledToBottom)
			list.setSelection(list.getCount() - 1);
	}
	mLogScrollPosition = LOG_SCROLL_NULL;
}
 

import android.widget.ListView; //导入方法依赖的package包/类
private void addItem(Activity activity, String name, Integer value)
{
    ShadowActivity shadowActivity = shadowOf(activity);
    ListView list = (ListView)activity.findViewById(R.id.list);
    assertNotNull(list);

    int initialCount = list.getCount();

    shadowActivity.clickMenuItem(R.id.action_add);
    ItemizationAdapter adapter = (ItemizationAdapter)list.getAdapter();
    Itemization listItem = adapter.getItem(initialCount);
    assertNotNull(listItem);
    listItem.name = name;
    listItem.value = value;

    assertEquals(initialCount+1, list.getCount());
}
 

import android.widget.ListView; //导入方法依赖的package包/类
private void addItems(Activity activity, Map<String, Integer> items)
{
    ListView list = (ListView)activity.findViewById(R.id.list);
    assertNotNull(list);

    ShadowListView shadowList = shadowOf(list);
    shadowList.populateItems();

    int initialCount = list.getCount();

    for(Map.Entry<String, Integer> item : items.entrySet())
    {
        addItem(activity, item.getKey(), item.getValue());
    }

    assertEquals(initialCount + items.size(), list.getCount());
}
 

import android.widget.ListView; //导入方法依赖的package包/类
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
    Log.d(THIS_FILE, "onPrepareActionMode");
    ListView lv = getListView();
    int nbrCheckedItem = 0;

    for (int i = 0; i < lv.getCount(); i++) {
        if (lv.isItemChecked(i)) {
            nbrCheckedItem++;
        }
    }
    menu.findItem(R.id.delete).setVisible(nbrCheckedItem > 0);
    menu.findItem(R.id.dialpad).setVisible(nbrCheckedItem == 1);
    return false;
}
 

import android.widget.ListView; //导入方法依赖的package包/类
private void actionModeInvertSelection() {
    ListView lv = getListView();

    for(int i = 0; i < lv.getCount(); i++) {
        lv.setItemChecked(i, !lv.isItemChecked(i));
    }
    mMode.invalidate();
}
 

import android.widget.ListView; //导入方法依赖的package包/类
@Override
public void onSaveInstanceState(final Bundle outState) {
	super.onSaveInstanceState(outState);

	// Save the last log list view scroll position
	final ListView list = getListView();
	final boolean scrolledToBottom = list.getCount() > 0 && list.getLastVisiblePosition() == list.getCount() - 1;
	outState.putInt(SIS_LOG_SCROLL_POSITION, scrolledToBottom ? LOG_SCROLLED_TO_BOTTOM : list.getFirstVisiblePosition());
}
 

import android.widget.ListView; //导入方法依赖的package包/类
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    // load layout with activity
    ViewStub stub = (ViewStub) findViewById(R.id.layout_stub);
    stub.setLayoutResource(R.layout.layout_all_articles_list_view);
    View inflated = stub.inflate();
    // listview with articles
    articlesListViewItems = (ListView) findViewById(R.id.listViewArticles);
    // database init
    mDbHelper = new ArticlesDataSource(getApplicationContext());
    mDbHelper.createDatabase();
    mDbHelper.open();

    // get data from intent to define what's group to show
    long groupId = this.getIntent().getLongExtra("group_id", -1);
    statusToShow = (ActivityArticlesStatusToShow) this.getIntent().getSerializableExtra("status_what_show");
    String groupName = this.getIntent().getStringExtra("group_name");

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setTitle(getString(R.string.all_articles_menu_title));

    // if there is start activity, so show drawer
    if (groupId == 0 || groupId == -1) {
        initDrawer();
        articlesCursor = mDbHelper.getAllArticles();
    } else {
        // ... but if this activity is used to show short listview with articles, just show toolbar with back button
        initToolbarWithBackButton(groupName);
        articlesCursor = mDbHelper.getArticlesByGroup(groupId);
        sequenceIds = mDbHelper.getIdsOfGroup(groupId);
    }
    // listener of row click
    articlesListViewItems.setOnItemClickListener(listViewClickListener);

    // if we just open application - adapter has never been used, so create this
    if (articlesViewAdapter == null) {
        articlesViewAdapter = new ArticleCursorAdapter(this, articlesCursor, 0);
    } else
    /**
     * otherwise it means that this activity is used inside app - to show short list of articles
     * just change cursor
     */
        articlesViewAdapter.changeCursor(articlesCursor);

    // Attach cursor adapter to the ListView
    articlesListViewItems.setAdapter(articlesViewAdapter);

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

    // if row's count greater that limit ,,,
    if (articlesListViewItems.getCount() > LIMIT_TO_SHOW_SEARCH_FIELD) {
        // fab link to listview
        fab.attachToListView(articlesListViewItems);
        fab.setVisibility(View.VISIBLE);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // go to top of listview
                articlesListViewItems.setSelectionAfterHeaderView();
            }
        });
    }
    else {
        // otherwise - hide fab
        fab.setVisibility(View.INVISIBLE);
    }
}
 

import android.widget.ListView; //导入方法依赖的package包/类
private int getListViewHeight(ListView list) {
    return list.getCount() * (int) ListItemHeight;
}