我试图取消选择我所有的复选框选择但没有成功
通过使用此代码按下我的 java android 程序中的任何按钮
public void onListItemClick(ListView parent, View v, int position, long id)
 {
        parent.setItemChecked(position, parent.isItemChecked(position));
 }
 @Override
 protected  Dialog onCreateDialog(int id, Bundle args){
    switch(id){
    case 1:
        return new AlertDialog.Builder(this)
        .setIcon(R.drawable.ic_launcher)
        .setTitle("This is a dialog with some simple text...")
        .setPositiveButton("OK", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton)
            {
                Toast.makeText(getBaseContext(),"OK clicked!", Toast.LENGTH_SHORT).show();
            }})
        .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton)
            {
                Toast.makeText(getBaseContext(),"Cancel clicked!", Toast.LENGTH_SHORT).show();
            }
            })
        .setMultiChoiceItems(items, itemsChecked, new DialogInterface.OnMultiChoiceClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                Toast.makeText(getBaseContext(),items[which] + (isChecked ? " checked!":" unchecked!"),Toast.LENGTH_SHORT).show();
            }
            })
        .create();
        }
        return(null);
    }
如何全选和取消全选?