Databases
StackOverflow2013
Postsdbo
POaccessing a specific view from onclick listener inside getView of customer adapter
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POaccessing a specific view from onclick listener inside getView of customer adapter
    primarykey
    data
    text
    <p>I want the onclick method to communicate with the other views in my layout. I am getting a NullPointerException when attempting to do so. I think I may be doing it wrong. </p> <p>My <code>getView</code> method is below:</p> <pre><code> public View getView(int position, View convertView, ViewGroup parent) { View v = convertView; ViewHolder holder; final int p =position; if (v == null) { LayoutInflater vi = (LayoutInflater) _c.getSystemService(Context.LAYOUT_INFLATER_SERVICE); v = vi.inflate(R.layout.menuitemrow, null); holder = new ViewHolder(); holder.image = (ImageView) v.findViewById(R.id.MIR_itemImage);holder.image.setTag(position); holder.itemName = (TextView)v.findViewById(R.id.MIR_itemName);holder.itemName.setTag(position); holder.itemPrice = (TextView)v.findViewById(R.id.MIR_itemPrice);holder.itemPrice.setTag(position); holder.itemOther = (TextView)v.findViewById(R.id.MIR_itemOther);holder.itemOther.setTag(position); holder.details = (Button) v.findViewById(R.id.MIR_detailsbtn);holder.details.setTag(position); holder.qAdd = (Button) v.findViewById(R.id.MIR_qaddbtn);holder.qAdd.setTag(position); v.setTag(holder); } else holder = (ViewHolder) v.getTag(); MenuItemDetail mid = _data.get(position); holder.image.setImageResource(mid.icon); holder.itemName.setText(mid.itemName); holder.itemPrice.setText("Price: $"+mid.itemPrice); holder.itemOther.setText(mid.itemOther); //set click listeners holder.details.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { m =_data.get(p); s = m.getItemName(); Toast.makeText(_c, "clicked details"+p+" "+s, Toast.LENGTH_SHORT).show(); } }); holder.qAdd.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(_c, "clicked quick add "+p, Toast.LENGTH_SHORT).show(); TextView btnUpdate = (TextView) v.findViewById(R.id.CBV_textview2); //btnUpdate.setTag(1); //btnUpdate.setText(btnUpdate.getTag().toString()); btnUpdate.setText("b"); } }); return v; } </code></pre> <p>as you can see I am just assigning a number to the <code>getTag</code> just to pass it to the <code>setText</code> method. I have tried it commenting out the set and get, using just a <code>String</code>.</p> <p>the problematic line is <code>btnUpdate.setText("b");</code> </p> <p>Any ideas?</p> <p>to summarize I am trying to access a <code>TextView</code> of a custom <code>Button</code> inside of a custom <code>ListView</code> from its customer adapter's <code>getView</code> method.</p> <p>UPDATE for comment:</p> <p>This is a Custom Listview being displayed with other buttons. I want the listview item (a button that is part of the custom <code>ListView</code>) when it is click to update the textview of a custom button I created that is displayed in the same acitivity as the custom list view. </p> <p>The Layout is below:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" &gt; &lt;Button android:id="@+id/MI_backbutton" android:layout_width="fill_parent" android:layout_height="50dp" android:layout_weight="1" android:text="@string/back_list_categories" android:textSize="@dimen/FontSize8" /&gt; &lt;ListView android:id="@+id/menuList" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="20" &gt; &lt;/ListView&gt; &lt;LinearLayout android:layout_width="match_parent" android:layout_height="50dp" android:layout_gravity="bottom" android:layout_marginBottom="5dp" android:layout_weight="1" &gt; &lt;Button android:id="@+id/button2" style="@android:style/Widget.Button" android:layout_width="wrap_content" android:layout_height="50dp" android:layout_gravity="bottom" android:layout_weight="1" android:text="@string/generalbutton" /&gt; &lt;include android:id="@+id/MI_checkorder" style="android:buttonStyle" android:layout_width="wrap_content" android:layout_height="50dp" android:layout_gravity="bottom" android:layout_marginTop="5dp" android:layout_weight="1" layout="@layout/custombtnview" android:background="@style/AppTheme" android:clickable="true" android:focusable="true" /&gt; &lt;/LinearLayout&gt; </code></pre> <p></p> <p>In the view I am referencing to get the Textview, the textview is not there. What is in that view is the <code>MI_checkorder</code>. I was thinking maybe this is why I am getting the <code>NullPointerException</code> for my <code>btnUpdate</code>. the textveiw <code>CBV_textview2</code> is part of the view I created as a button(<code>MI_checkorder</code>). </p> <p>I now have the button but I am unable to get the change to show on the UI. Here is the code I added:</p> <pre><code> public void onClick(View v) { Toast.makeText(_c, "clicked quick add "+p, Toast.LENGTH_SHORT).show(); TextView btnUpdate = (TextView) inflateToEdit(_c, v).findViewById(R.id.CBV_textview2); //btnUpdate.setTag(1); //btnUpdate.setText(btnUpdate.getTag().toString()); btnUpdate.setText("b"); } </code></pre> <p>and this is the method I created in the custom adapter class.</p> <pre><code> public View inflateToEdit(Context c, View view){ View vw = view; LayoutInflater vi = (LayoutInflater) _c.getSystemService(Context.LAYOUT_INFLATER_SERVICE); return vi.inflate(R.layout.custombtnview, null); } </code></pre> <p>It is updating the button's text but it is not showing on the UI. I do not think i can update the UI from this point in the code. I think I need to do it from the activity.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMark
    1. USMark
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POaccessing a specific view from onclick listener inside getView of customer adapter
      1. This table or related slice is empty.
      1. VTUpMod
    1. COIs this in a ListView, or something? Please tell us a bit more. Usually you can just assign an OnItemClickListener to an AdapterView (Like a ListView holding an array adapter) that would make this process a whole lot simpler, if I understand your problem correctly.
      singulars
      1. POaccessing a specific view from onclick listener inside getView of customer adapter
      1. USjlindenbaum
    2. COI updated the Question to be more clear
      singulars
      1. POaccessing a specific view from onclick listener inside getView of customer adapter
      1. USMark
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload