TextView的文本值的onclick刷新 [英] TextView text value refreshed onclick

问题描述

我有一个活动，我想显示上下文菜单每一个网格单元被窃听时一个gridview。我想这个上下文菜单来显示一个TextView的动态值（抽头网格元素的位置）。我创造我自己的上下文菜单，因为我不想警报或默认的Andr​​oid文本菜单。
另外我使用的SDK：

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" />

下面是我的java.class为GridView

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));

        }

• 我第一次点击一格元素，我的上下文菜单显示了在TextView的正确文本值


• 第2次和每一个其他时间，菜单仍然存在，只是TextView的文本值是空的，我需要这个值是刷新每次用户在网格中抽头的元素



布局为GridView活动

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>

布局上下文菜单我夸大：

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>

什么我错过了？

推荐答案

尝试通过使用检索的 TAB1 的你的 ContextualMenuView 的实例（ contextualMenuView 的）

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

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

另外，你可以尝试虚增您在onCreate（）方法的 ContextualMenuView 的和实例化的的TextView 的存在呢？

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

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