CODEWITHSUNDEEP
androidscreen-orientation
ssk
ssk

Reputation: 9265

Handling orientation changes android

I have a Table containing a number of images per row. The number of images per row is decided on the fly based on the image width and screen width. When I use the phone normally, images are spaced on the phone screen. When the phone orientation changes, all the images appear on the same row. Should I explicitly handle the orientation changes for this case?

// get the number of images per column based on the screen
// resolution
Display display = getWindowManager().getDefaultDisplay();
int screenWidth = display.getWidth();

Resources res = getResources();
Drawable drawable = res.getDrawable(R.drawable.emo_im_happy);

numberOfImagesPerRow = screenWidth / (drawable.getIntrinsicWidth() + 10);

int numberOfRows = (int) Math.ceil(numberOfEmotions
                    / numberOfImagesPerRow);

Upvotes: 0

Views: 1374

Answers (3)

Drejc
Drejc

Reputation: 14286

If you want to persist the number of images displayed in one row you can use the GridView. In this way you can control the number of columns per line.

<GridView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:isScrollContainer="true" 
        android:numColumns="3"
        android:verticalSpacing="10dp" 
        android:horizontalSpacing="10dp"
        />

Upvotes: 0

Ben Komalo
Ben Komalo

Reputation: 71

It depends when that code is run, but you generally don't need to do anything special.

When Android detects an orientation change, the system will re-create your Activity and it will get a chance to go through onCreate and re-layout and re-render everything according to the new configuration.

Using android android:configChanges should be used with care and not be the first option you think of, since the system will do a better job at selecting appropriate resources for you after a configuration change (and you'll have to handle that code path for other forms of configuration change anyways).

See: http://developer.android.com/guide/topics/resources/runtime-changes.html

Upvotes: 3

Randy Sugianto &#39;Yuku&#39;
Randy Sugianto &#39;Yuku&#39;

Reputation: 73453

Yes. One way is to put android:configChanges="orientation|keyboardHidden" on your <activity> in the AndroidManifest.xml file, and then override onConfigurationChanged to detect the orientation change.

Upvotes: 0

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