Scrollview vertical and horizontal in android

Question

I'm really tired looking for a solution for Scrollview vertical and horizontal.

I read that the any view/layout implements this feature in the framework but i need something like this.

I need to define a layout within other, the child layout must implement scrolling vertical/horizontal for moving.

Initially implemented a code that move the layout pixel by pixel, but i think that is not the right way. I tried with ScrollView and HorizontalScrollView but any ones work like i want, because only implement vertical or horizontal scrolling.

Canvas is not my solution because i need attach listeners in someones child elements.

What can i do?

Answer 1

Option #1: You can come up with a new UI design that does not require simultaneous horizontal and vertical scrolling.

Option #2: You can obtain the source code to ScrollView and HorizontalScrollView, learn how the core Android team implemented those, and create your own BiDirectionalScrollView implementation.

Option #3: You can get rid of the dependencies that are requiring you to use the widget system and draw straight to the Canvas.

Option #4: If you stumble upon an open source application that seems to implement what you seek, look to see how they did it.

Answer 2

I found a better solution.

XML: (design.xml)

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent">
  <FrameLayout android:layout_width="90px" android:layout_height="90px">
    <RelativeLayout android:id="@+id/container" android:layout_width="fill_parent" android:layout_height="fill_parent">        
    </RelativeLayout>
</FrameLayout>
</FrameLayout>

Java Code:

public class Example extends Activity {
  private RelativeLayout container;
  private int currentX;
  private int currentY;

  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.design);

    container = (RelativeLayout)findViewById(R.id.container);

    int top = 0;
    int left = 0;

    ImageView image1 = ...
    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    layoutParams.setMargins(left, top, 0, 0);               
    container.addView(image1, layoutParams);

    ImageView image2 = ...
    left+= 100;
    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    layoutParams.setMargins(left, top, 0, 0);               
    container.addView(image2, layoutParams);

    ImageView image3 = ...
    left= 0;
    top+= 100;
    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    layoutParams.setMargins(left, top, 0, 0);               
    container.addView(image3, layoutParams);

    ImageView image4 = ...
    left+= 100;     
    RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    layoutParams.setMargins(left, top, 0, 0);               
    container.addView(image4, layoutParams);
  }     

  @Override 
  public boolean onTouchEvent(MotionEvent event) {
    switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN: {
            currentX = (int) event.getRawX();
            currentY = (int) event.getRawY();
            break;
        }

        case MotionEvent.ACTION_MOVE: {
            int x2 = (int) event.getRawX();
            int y2 = (int) event.getRawY();
            container.scrollBy(currentX - x2 , currentY - y2);
            currentX = x2;
            currentY = y2;
            break;
        }   
        case MotionEvent.ACTION_UP: {
            break;
        }
    }
      return true; 
  }
}

That's works!!!

If you want to load other layout or control, the structure is the same.