How to make sure that all the ListView entries are deleted and display the text " ListView is empty. "?

    2 answers 2

    Using the getCount() method, you will find out the number of elements in the sheet and, depending on how many they are, perform the appropriate actions:

     ListView list = (ListView) findById(R.id.list_id); int count = list.getCount();

    If count = 0 , display a message!

    • one
      Thank you very much, did - it works. I will add that to work with deleting and navigating through different activations, I also did the same check in the onStart () method, so that when adding and returning to the necessary activit, the inscription disappeared. - denAbra

    To implement the function of a message that the list is empty, ListView has the standard setEmptyView(View) method:

    You can set an arbitrary View (in this TextView example) that the list is empty from the code:

     ListView lv = (ListView)findViewById(R.id.listView); View empty = findViewById(R.id.emptyList); lv.setAdapter(adapter); lv.setEmptyView(empty);

    markup:

     <RelativeLayout android:id="@+id/listLayout" android:layout_width="match_parent" android:layout_height="match_parent" > <ListView android:id="@+id/listView" android:layout_width="match_parent" android:layout_height="match_parent" /> <TextView android:id="@+id/emptyList" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="EMPTY!"/> </RelativeLayout>

    Through ViewStub you can display the whole Layout , which will be quite complicated: formatted text, a picture and so on.

     <RelativeLayout android:id="@+id/listLayout" android:layout_width="match_parent" android:layout_height="match_parent" > <ListView android:id="@+id/listView" android:layout_width="fill_parent" android:layout_height="fill_parent" /> <ViewStub android:id="@+id/emptyList" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout="@layout/emptyLayout" /> </RelativeLayout>

    Or, if the inheritance from ListActivity is used, use the system ID ( @id/android:empty ) to report that the list is empty. This ID should be assigned to View on the markup, which will show the message:

     <RelativeLayout android:id="@+id/ListLayout" android:layout_height="match_parent" android:layout_width="match_parent"> <ListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" /> <TextView android:id="@android:id/empty" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </RelativeLayout>