Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>The reason it does nothing is because you aren't grabbing an existing ImageView and manipulating it (e.g. by findViewById()). Instead you're just creating a new ImageView. You need to either grab an existing imageview or add that newly created one to to your contentview's viewgroup.</p> <p>EDIT:</p> <p>You have a basic misunderstanding about how to set the content view of your Activity and what finding a view by id means. </p> <ol> <li>Each of your Activities has a main content view. You set this in onCreate by calling setContentView and passing in the id of one of your layouts (R.layout.somelayout). The integer id that you are passing in is simply a public static int located inside of an auto-generated class called R.java. Inside that class are multiple nested static classes, such as <code>public static final class layout</code> and <code>public static final class id</code>. The The Android Asset Packaging Tool (aapt) takes your application resource files (things defined in XML) and compiles them so you can reference them in code. So, there is no type or variable, etc with the name Dynres, for example. All there is, is a public int that you can references as R.id.Dynres. BUT, again, you can think of that int as a compiled representation of your xml resource. Which leads me to my next point.</li> <li>findViewById is a method that can search inside of some ViewGroup (viewgroup being some view that can hold other children, like a linearlayout or a relativelayout (as opposed to TextView and other widgets that do not contain children)) to find a child view with the id of the one you passed in. So, for example if you have reference to some View, you can call someView.findViewById(R.id.someId) which will try to find a view with that id anywhere in that view's hierarchy. If there is no such view with that id inside of that view, then it returns null. Now, you can also call findViewById inside of an Activity, which simply searches inside of the layout that you set as the contentView of your Activity for that child view. So, for example, if you set the contentview of your Activity like setContentView(R.layout.mylayout) and mylayout.xml was some linearlayout that had a textview inside of it with the id of 'my_textview' then you can do findViewById(R.id.my_textview). Ok, great this finds the view, but now, to actually have a TextView <em>object</em> as in a Java object you can work with and call methods on as a TextView, you need to cast that View to a TextView. So, <code>TextView tv = (TextView)findViewById(R.id.my_textview)</code> simply uses the id to find that view then you cast it to an object of type TextView assigned to the variable "tv" so now tv is what you need to use to call methods on, etc. So, your code needs to <code>beDynRes.setText("Good to hear! have a nice day!")</code></li> <li>You don't want to set the contentview to be the textview. The contentview should be some ViewGroup defined in your xml layout that CONTAINS the textview. </li> </ol>
    singulars
    1. This table or related slice is empty.
    1. POChanging view based on integer from previous activity
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USLuxuryMode
    1. USLuxuryMode
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POChanging view based on integer from previous activity
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThanks a lot, I'm still playing around with it, attempting to do the same for strings of text. DynRes is defined in xml and nothing particularly special has been done to it. I added the code to the bottom of my post and would really appreciate your input. Thanks a lot.
      singulars
      1. PO
      1. USuser1398478
    2. CO@user1398478 please see my edit
      singulars
      1. PO
      1. USLuxuryMode
    3. COThanks for your elaborate reply, I tend to learn these things by throwing myself at them, but it seems I'm missing a few important steps.
      singulars
      1. PO
      1. USuser1398478
 

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