Hi All,
I tried displaying a small image in ContentView. But when i run the
application It says ImageApplication closed unexpectedly....
This is my Activity Class...
public class ImageApplication extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
((Gallery) findViewById(R.id.gallery))
.setAdapter(new ImageAdapter(this));
}
}
And my Image Adapter class is this
public class ImageAdapter extends BaseAdapter {
/** The parent context */
private Context myContext;
/** All images to be displayed.
* Put some images to project-folder:
* '/res/drawable/uvw.xyz' .*/
private int[] myImageIds = {
R.drawable.image1
};
/** Simple Constructor saving the 'parent' context. */
public ImageAdapter(Context c) { this.myContext = c; }
/** Returns the amount of images we have defined. */
public int getCount() { return this.myImageIds.length; }
/* Use the array-Positions as unique IDs */
public Object getItem(int position) { return position; }
public long getItemId(int position) { return position; }
/** Returns a new ImageView to
* be displayed, depending on
* the position passed. */
public View getView(int position, View convertView, ViewGroup
parent) {
ImageView i = new ImageView(this.myContext);
i.setImageResource(this.myImageIds[position]);
/* Image should be scaled as width/height are set. */
i.setScaleType(ImageView.ScaleType.FIT_XY);
/* Set the Width/Height of the ImageView. */
i.setLayoutParams(new Gallery.LayoutParams(150, 150));
return i;
}
/** Returns the size (0.0f to 1.0f) of the views
* depending on the 'offset' to the center. */
public float getScale(boolean focused, int offset) {
/* Formula: 1 / (2 ^ offset) */
return Math.max(0, 1.0f / (float)Math.pow(2,
Math.abs(offset)));
}
}
When i run the appliction i m getting this Exception in console...
10-17 17:14:09.864: ERROR/AndroidRuntime(203):
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.dreamapp.imageapplication.activity/
com.dreamapp.imageapplication.activity.ImageApplication}:
java.lang.NullPointerException
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2140)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2156)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
android.app.ActivityThread.access$1800(ActivityThread.java:112)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1580)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
android.os.Handler.dispatchMessage(Handler.java:88)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
android.os.Looper.loop(Looper.java:123)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
android.app.ActivityThread.main(ActivityThread.java:3742)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
java.lang.reflect.Method.invokeNative(Native Method)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
java.lang.reflect.Method.invoke(Method.java:515)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
com.android.internal.os.ZygoteInit
$MethodAndArgsCaller.run(ZygoteInit.java:739)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:497)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
dalvik.system.NativeStart.main(Native Method)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): Caused by:
java.lang.NullPointerException
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
com.dreamapp.imageapplication.activity.ImageApplication.onCreate(ImageApplication.java:
17)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:
1122)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2103)
10-17 17:14:09.864: ERROR/AndroidRuntime(203): ... 11 more
I have entry for id named gallery in main.xml. but it says
NullPointerException at this line
((Gallery) findViewById(R.id.gallery))
.setAdapter(new ImageAdapter(this));
Can anybody identify the error, i m stuck up with this for the past 2
days......
Thanks in Advance
Thanks
JavaAndroid
On Oct 15, 11:55 am, JavaAndroid <[EMAIL PROTECTED]> wrote:
> Hi Shailesh,
> Thanks a lot for ur Help. Let me try that...Thanks again.
>
> On Oct 15, 11:45 am, "shailesh prakash" <[EMAIL PROTECTED]> wrote:
>
>
>
> > Hi,
> > you may like to try this
> > :http://code.google.com/p/apps-for-android/source/browse/trunk/Photost...
>
> > On 10/15/08, JavaAndroid <[EMAIL PROTECTED]> wrote:
>
> > > Hi All,
> > > Can anyone direct me to some links / tutorials that will help me to
> > > start experimenting on displaying images in Android . Is there any way
> > > to add Servlet/JSP API in Android Application. Can i refer image that
> > > is residing in a web server.
>
> > > Thanks in Advance
>
> > > Thanks
> > > JavaAndroid- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
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