android.widget.ListView#isItemChecked ( )源码实例Demo

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();
    }
}
 

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();
    
}
 

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    ListView list = (ListView) parent;
    int lastIndex = mGrpItems.size() - 1;
    if (list.isItemChecked(lastIndex)) {
        list.setItemChecked(lastIndex, false);
        createNewGroup();
        return;
    }

    boolean checked = list.isItemChecked(position);
    mGrpItems.get(position).setChecked(checked);
    String name = mGrpItems.get(position).toString();

    if (checked) {
        mAppGroups.add(name);
    } else {
        mAppGroups.remove(name);
    }
    updateGrpButton();
}
 

@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;
}