Android - horizontal scrolling of multiple viewable items

This one has surprisingly easy answer, I'm not even sure why it wasn't posted right away. All that I needed to do to get the exact effect was to override PagerAdapter#getPageWidth method. By default it returns 1 but if you set it to 0.5 you will get 2 pages, 0.33 will give you 3, etc. Depending on width of the separator between pager items you may have to slightly decrease the value.

See the following snippet:

    @Override    public float getPageWidth(final int position) {        // this will have 3 pages in a single view        return 0.32f;    }

Once I wrote something similar as template. In my example I can scroll with the buttons up and down and sidewise. You could modify it a little bit to fulfill your requirements. In my example I have 4 Views arranged like this:

1 2
3 4

It looks like this. On the picture I scroll from view 1 to the right to view 2:

The code consist of this xml:

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    >      <LinearLayout        android:layout_height="350sp"        android:layout_width="320sp">        <LinearLayout            android:id="@+id/viewContainer"            android:background="#CCCCCC"            android:layout_width="640sp"            android:layout_height="700sp">        </LinearLayout>     </LinearLayout>      <TableLayout            android:id="@+id/tableLayout"            android:layout_width="320sp"            android:layout_height="fill_parent"            android:stretchColumns="1"            android:gravity="bottom"            android:layout_alignParentBottom="true">            <TableRow            android:background="#333333"            android:gravity="bottom">                   <Button                android:id="@+id/btnUp"                android:layout_width="60sp"                android:layout_height="50sp"                android:text="Lift U"                />            <Button                android:layout_width="60sp"                android:layout_height="50sp"                android:visibility="invisible"            />            <Button                android:layout_width="60sp"                android:layout_height="50sp"                android:visibility="invisible"            />            <Button                android:id="@+id/btnScreenUp"                android:layout_width="60sp"                android:layout_height="50sp"                android:layout_gravity="right"                android:text="Scrn U"                />            </TableRow>            <TableRow              android:background="#444444"              android:layout_gravity="right">              <Button                android:id="@+id/btnDown"                android:layout_width="60sp"                android:layout_height="50sp"                android:text="Lift D"                />              <Button                android:id="@+id/btnEnter"                android:layout_width="60sp"                android:layout_height="50sp"                android:text="Enter"                />               <Button                android:id="@+id/btnScreenLeft"                android:layout_width="60sp"                android:layout_height="50sp"                android:layout_gravity="right"                android:text="Scrn L"                />               <Button                android:id="@+id/btnScreenDown"                android:layout_width="60sp"                android:layout_height="50sp"                android:layout_gravity="right"                android:text="Scrn D"                />               <Button                android:id="@+id/btnScreenRight"                android:layout_width="60sp"                android:layout_height="50sp"                android:layout_gravity="right"                android:text="Scrn R"                />            </TableRow>    </TableLayout></FrameLayout>

and this Java code:

import android.app.Activity;import android.os.Bundle;import android.util.DisplayMetrics;import android.view.Gravity;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Button;import android.widget.LinearLayout;import android.widget.TextView;public class ViewSwitcherTest extends Activity {    private TextView view1, view2, view3, view4;    private Button btnUp, btnEnter, btnDown, btnScreenDown, btnScreenUp, btnScreenLeft, btnScreenRight;    private LinearLayout viewContainer;//  private TableLayout tableLayout;    private LinearLayout.LayoutParams layoutParams;    private DisplayMetrics metrics = new DisplayMetrics();    private int top = 0, left = 0;    private float density = 1.0f;//  private ViewSwitcher switcher;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        getWindowManager().getDefaultDisplay().getMetrics(metrics);        density = metrics.density;        setContentView(R.layout.main);//      Buttons        btnEnter = (Button)findViewById(R.id.btnEnter);        btnUp = (Button)findViewById(R.id.btnUp);        btnDown = (Button)findViewById(R.id.btnDown);        btnScreenDown = (Button)findViewById(R.id.btnScreenDown);        btnScreenUp = (Button)findViewById(R.id.btnScreenUp);        btnScreenLeft = (Button)findViewById(R.id.btnScreenLeft);        btnScreenRight = (Button)findViewById(R.id.btnScreenRight);//      --------//      tableLayout = (TableLayout)findViewById(R.id.tableLayout);        view1 = new TextView(this);        view1.setBackgroundResource(R.drawable.view1);        view1.setHeight((int)(350*density));        view1.setWidth((int)(320*density));        view1.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL);        layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);        layoutParams.setMargins(left, top, 0, 0);           viewContainer = (LinearLayout)findViewById(R.id.viewContainer);        viewContainer.addView(view1, layoutParams);        //Add 2nd view        view2 = new TextView(this);        view2.setBackgroundResource(R.drawable.view2);        view2.setHeight((int)(350*density));        view2.setWidth((int)(320*density));        view2.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL);        layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);        layoutParams.setMargins(left, top, 0, 0);        viewContainer.addView(view2, layoutParams);         //Add 3rd view        view3 = new TextView(this);        view3.setBackgroundResource(R.drawable.view3);        view3.setHeight((int)(350*density));        view3.setWidth((int)(320*density));        view3.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL);        top += 350*density;        left += 640*density*(-1);        layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);        layoutParams.setMargins(left, top, 0, 0);        viewContainer.addView(view3, layoutParams);             //add 4th view        view4 = new TextView(this);        view4.setBackgroundResource(R.drawable.view4);        view4.setHeight((int)(350*density));        view4.setWidth((int)(320*density));        view4.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL);        top += 0;        left += 640*density;        layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);        layoutParams.setMargins(left, top, 0, 0);        viewContainer.addView(view4, layoutParams);             btnEnter.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // Quit the application for now                finish();            }        });        btnScreenLeft.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                viewContainer.scrollBy(-10,0);            }        });        btnScreenRight.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                viewContainer.scrollBy(10,0);            }        });        btnScreenUp.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                viewContainer.scrollBy(0,-10);            }        });        btnScreenDown.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                viewContainer.scrollBy(0,10);            }        });//      view1.setOnKeyListener(new OnKeyListener() {            //          @Override//          public boolean onKey(View v, int keyCode, KeyEvent event) {//              if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN)//                  viewContainer.scrollBy(0,10);//              return true;//          }//      });    }}

The big numbers on every screen are black background images with those numbers painted on it. (I didn't post it here because you will probably modify the code anyway).

We are doing something pretty much exactly like you are describing using a Gallery with Fragments, and a gallery adapter extending the BaseAdapter. I would recommend going with a gallery to achieve your goal (we also use a ViewPager for the view where we do not need to see the other fragments).