Android Autoscroll imageview

Question

In my activity I have just an ImageView. In it, the src is a picture that is a lot bigger than the screen. I want the picture to scroll slooooowly from left to right until it re

Answer 1

What you could do is add the ImageView inside a ScrollView. Like this

<ScrollView
    android:id="@+id/img_scroll"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/IMAGENAME" />
</ScrollView>

As you want to scroll the Image automatically, you could create a AsyncTask and inside doInBackground() method, create a new Runnable or runOnUiThread() and send commands to the ScrollView using it's ID to scroll as you need it to.

Answer 2

So, the solution to my problem is here (for all of the new android developers, like me, who might need this for their apps):

public class MainActivity extends Activity {

    Animation           _translateAnimation;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        _translateAnimation = new TranslateAnimation(TranslateAnimation.ABSOLUTE, 0f, TranslateAnimation.ABSOLUTE, -300f, TranslateAnimation.ABSOLUTE, 0f, TranslateAnimation.ABSOLUTE, 0f);
        _translateAnimation.setDuration(8000);
        _translateAnimation.setRepeatCount(-1);
        _translateAnimation.setRepeatMode(Animation.REVERSE); // REVERSE
        _translateAnimation.setInterpolator(new LinearInterpolator());
        ImageView img = (ImageView) findViewById(R.id.img);
        img.startAnimation(_translateAnimation);
    }
}

and the layout:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/global_relative"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center"
    android:orientation="vertical"
    >

<ScrollView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" >

    <ImageView
        android:id="@+id/img"
        android:layout_width="600dp"
        android:layout_height="wrap_content"
        android:adjustViewBounds="true"
        android:background="@drawable/rainforest"
        android:scaleType="center"
        android:src="@drawable/rainforest613x490" >

    </ImageView>
</ScrollView>  
</RelativeLayout>

just make sure your image is big/high enough to fit the screen, and is (+300dp) wider than the screen width (or adjust the code above).

Happy coding ;)

Answer 3

Exemple :

private Animation           _translateAnimation;
private ImageView       _image;

_image = (ImageView)findViewById(R.id.yourimage);

_translateAnimation = new TranslateAnimation(TranslateAnimation.ABSOLUTE, 0f, TranslateAnimation.ABSOLUTE, 100f, TranslateAnimation.ABSOLUTE, 0f, TranslateAnimation.ABSOLUTE, 0f);
_translateAnimation.setDuration(10000);
_translateAnimation.setRepeatCount(-1);
_translateAnimation.setRepeatMode(Animation.REVERSE);
_translateAnimation.setInterpolator(new LinearInterpolator());
_image.setAnimation(_translateAnimation);

---

This will make _linearLoading translate slowly right and left and right and left...

More duration = more slowly

TranslateAnimation.ABSOLUTE = Work with the position of the image TranslateAnimation.RELATIVE_TO_PARENT = Work with the parent layout ...

The method TranslateAnimation(start x, end x, start y, end y)

play with that