TextView text value refreshed onclick

问题

I have a gridview in an activity where I am trying to display a contextual menu each time a grid element is tapped. I want this contextual menu to display a dynamic value in a textview (the position of the tapped grid element). I am creating my own contextual menu because I don't want an alert or the default android contextmenu. Also I am using SDKs:

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />

Here is my java.class for the gridview

    public class Grid_Items extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_grid_items);       
    GridView gridView = (GridView) findViewById(R.id.gridViewLayout);
    gridView.setAdapter(new ImageAdapter(this));
    gridView.setOnItemClickListener(new OnItemClickListener() {

    View contextualMenuView = null;         

        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {

            // RelativeLayout that contains parent layout
            RelativeLayout rootLayout = (RelativeLayout)findViewById(R.id.root);

            // in case there is a context menu open, remove it
            if(contextualMenuView!=null) {
                rootLayout.removeView(contextualMenuView);
                }

            // inflate contextual menu
            contextualMenuView = getLayoutInflater().inflate(R.layout.contextual_menu, rootLayout);

            // sets values for the textview
            TextView tv = (TextView) findViewById(R.id.tab1);
            tv.setText("tab1 = "+String.valueOf(position));

        }

The first time I click on a grid element, my context menu shows up with the correct text value in the textview
The 2nd time and every other times, the menu is still there but the textview text value is empty, I need this value to be "refreshed" everytime the user taps on an element in the grid

layout for the gridview activity

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/root"
android:layout_width="match_parent"
android:layout_height="match_parent">

<GridView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/gridViewLayout" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"
    android:columnWidth="90dp"
    android:numColumns="auto_fit"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp"
    android:stretchMode="columnWidth"
    android:gravity="center">

</GridView>

</RelativeLayout>

Layout for the contextual menu I inflate:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/contextualMenuLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#ffffff">

<!-- --> 

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/tab1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"   
    android:layout_marginRight="10dip"
    android:layout_marginLeft="10dip"
    android:layout_marginTop="10dip"
    android:layout_marginBottom="10dip"
    android:textSize="28sp"

    android:textColor="#ff0000">
</TextView>

What have I missed?

回答1:

Try to retrieve tab1 by using your ContextualMenuView instance (contextualMenuView):

tv = (TextView) contextualMenuView.findViewById(R.id.tab1);

Also, could you try to inflate your ContextualMenuView in the onCreate() method and instantiate your TextView there too?

来源：https://stackoverflow.com/questions/14003892/textview-text-value-refreshed-onclick

标签

android

gridview

textview

contextmenu