Databases
StackOverflow2013
Postsdbo
POChange image on click of button
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POChange image on click of button
    primarykey
    data
    text
    <p>I'm trying to do a basic app where once you click the button the image changes randomly to one of the 7 <code>.png</code>images I have loaded. I've tried several different ways but can't seem to get it to work. Here's my code as of now:</p> <p><strong>.xml</strong></p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/RelativeLayout1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" android:background="@color/black" &gt; &lt;Button android:id="@+id/button1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="40dp" android:background="@color/white" android:text="@string/black" android:onClick="onClick"/&gt; &lt;ImageView android:id="@+id/image1" android:layout_width="320dp" android:layout_height="250dp" android:scaleType="fitXY" android:contentDescription="@string/black" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p><strong>.java</strong></p> <pre><code>public class Black extends Activity { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.black); } public void onClick() { ImageView imageView = (ImageView)findViewById(R.id.image1); int[] picture={R.drawable.black,R.drawable.blackairplane,R.drawable.blackbear,R.drawable.blackcircle,R.drawable.blackkite,R.drawable.blacksquare,R.drawable.blacktriangle}; Random r = new Random(); int n=r.nextInt(7); imageView.setImageResource(picture[n]); } } </code></pre> <p>My error message in Eclipse says:</p> <pre><code>java.lang.RuntimeException: Unable to instantiate activity ComponentInfo </code></pre> <p>Thanks for any help.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USFabio
    1. USjsollo2
    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
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POChange image on click of button
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COPost your manifest and your FULL logcat.
      singulars
      1. POChange image on click of button
      1. US323go
    2. COPost the ComponentInfo Class, please!
      singulars
      1. POChange image on click of button
      1. USMatthias B
 

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