我想制作一个FileExplorer。 在custom_list.xml中,我定义了一个CheckBox(Visible = GONE),一个图像和2个textViews。我想要的是,当我执行LongItemClick时,列表中的每个CheckBox都将View.VISIBLE的可见性更改为View.VISIBLE。 我已经用getChildCount()试过了。但问题是,它只适用于绘制,而不是当你滚动下来。如何将CustomListView中的所有CheckBox从GONE更改为VISIBLE?
那么如何通过在listview中对物品进行长按来显示所有CheckBox?
customAdapter
adapter = new CustomListAdapter(arrCurrentDirFolders, subheadListFolders, imgList, getActivity().getApplicationContext());
listView.setAdapter(adapter);
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
int pos, long id) {
// TODO Auto-generated method stub
HERE I WANT TO SET VISIBILITY = VISIBLE FOR ALL CHECKBOXES
/*for(int i = 0; i < listView.getChildCount(); i++) {
listView.getChildAt(i).findViewById(R.id.checkBox_checkDir).setVisibility(View.VISIBLE);
}*/
return true;
}
});
// set the list item on click listener
listView.setOnItemClickListener(newAdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Log.v("Position: ", position+" pressed");
}
});
custom_list.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<CheckBox
android:id="@+id/checkBox_checkDir"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:visibility="gone" />
<ImageView
android:id="@+id/img_customlist_icon"
android:layout_marginLeft="5dp"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_centerVertical="true"
android:layout_toEndOf="@+id/checkBox_checkDir" />
<TextView
android:id="@+id/headingText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="5dp"
android:textSize="20sp"
android:textStyle="bold"
android:layout_alignTop="@+id/img_customlist_icon"
android:layout_toEndOf="@+id/img_customlist_icon" />
<TextView
android:id="@+id/subHeadingText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_below="@+id/headingText"
android:layout_alignStart="@+id/headingText" />
</RelativeLayout>