Functions and usage of viewswitch

ViewSwitcher The function and usage of
Represents the view switching component , Multiple view Stack up , Show only one component at a time , When control from one view Switch to another view when , You can specify animation effects ,
To give viewswitcher Add multiple components , Use viewswitcher Of setfactory Method setting viewfactory, And by the viewfactory establish view

public class MainActivity extends Activity {
// Define a constant , Number of applications per screen
public static final int NUMBER_PER_SCREEN = 12;

    //  Internal classes representing the application 
    public static class DataItem {
            //  Application name 
            public String dataName;
            //  App icons 
            public Drawable drawble;
    }

    //  Save the list aggregate 
    private ArrayList<DataItem> items = new ArrayList<MainActivity.DataItem>();
    //  Record which screen is currently being displayed ,
    private int sceeNo = -1;
    //  Total number of screens saved 
    private int screenCount;
    ViewSwitcher vs;
    //  establish Layoutinflater object 
    LayoutInflater inflater;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            super.onCreate(savedInstanceState);
            setContentView(R.layout.viewswitcher);
            inflater = LayoutInflater.from(MainActivity.this);
            //  Create a containing 40 An element of liset aggregate , Used to simulate inclusion 40 Applications 
            for (int i = 0; i < 40; i++) {
                    String label = "" + i;
                    Drawable dr = getResources().getDrawable(R.drawable.mia5);
                    DataItem dt = new DataItem();
                    dt.dataName = label;
                    dt.drawble = dr;
                    items.add(dt);
            }
            // Calculate the total number of screens the application occupies 
            // The energy of the computing application can be divided NUMBER_PER_SCREEN;
            // If it's not divisible , The total number of screens should be the result of division plus 1;
            screenCount=items.size()%NUMBER_PER_SCREEN == 0?
                            items.size()/NUMBER_PER_SCREEN:
                                    items.size()/NUMBER_PER_SCREEN +1;
                            vs=(ViewSwitcher) findViewById(R.id.viewswitcher);
                            vs.setFactory(new ViewFactory() {
                                    // Return to one GridView Components 
                                    @Override
                                    public View makeView() {
                                            // TODO Auto-generated method stub
                                    // Load components , The actual is GridView Components 

                                            return inflater.inflate(R.layout.slidelistview, null);
                                    }
                            });
                            // The first screen is displayed when the page is loaded 
                            next(null);
    }

    public void next(View view) {
            // TODO Auto-generated method stub
            if (sceeNo < screenCount - 1) {
                    sceeNo++;
                    //  by ViewSwitcher Animate the component display process 
                    vs.setInAnimation(this, R.anim.slide_in_right);
                    //  by ViewSwitcher Animate the process of component hiding 
                    vs.setInAnimation(this, R.anim.slide_out_left);
                    //  Control what will be displayed on the next screen GridView Corresponding adapter
                    ((GridView) vs.getNextView()).setAdapter(ba);
                    //  Click the button on the right , Show next screen 
                    //  After learning gesture detection , You can also use gestures to display the next screen 
                    vs.showNext();
            }
    }

    public void prev(View v) {
            // TODO Auto-generated method stub
            if (sceeNo > 0) {
                    sceeNo--;
                    //  by viewswitcher Animate the component display process 
                    vs.setInAnimation(this, android.R.anim.slide_in_left);
                    //  by viewswitcher Animate the process of component hiding 
                    vs.setInAnimation(this, android.R.anim.slide_in_left);
                    //  Control what will be displayed on the next screen gridview Corresponding adapter
                    ((GridView) vs.getNextView()).setAdapter(ba);
                    //  Click the left button to display the previous screen , You can also use gestures 
                    //  After learning gesture detection , You can also realize the previous screen through gesture detection 
                    vs.showPrevious();
            }

    }

    //  The baseAdapter Responsible for the display of each screen GridView Provide list items 
    private BaseAdapter ba = new BaseAdapter() {

            @Override
            public View getView(int arg0, View arg1, ViewGroup arg2) {
                    // TODO Auto-generated method stub
                    View view = arg1;
                    if (arg1 == null) {
                            //  Load the layout file 
                            view = inflater.inflate(R.layout.labelicon,
                                            null);
                    }
                    //  Get the layout I see in imageview Components , And set the icon for it 
                    ImageView iv = (ImageView) view
                                    .findViewById(R.id.image01);
                    iv.setImageDrawable(getItem(arg0).drawble);
                    //  obtain 
                    TextView tv = (TextView) view
                                    .findViewById(R.id.textview);
                    tv.setText(getItem(arg0).dataName);
                    return view;
            }

            @Override
            public long getItemId(int arg0) {
                    // TODO Auto-generated method stub
                    //
                    return arg0;
            }

            @Override
            public DataItem getItem(int arg0) {
                    // TODO Auto-generated method stub
                    //  according to screenno Computation first argo List item data 
                    return items.get(sceeNo * NUMBER_PER_SCREEN + arg0);
            }

            @Override
            public int getCount() {
                    // TODO Auto-generated method stub
                    //  If you have reached the last screen , And the number of applications cannot be divided number——per_screen
                    if (sceeNo == screenCount - 1
                                    && items.size() % NUMBER_PER_SCREEN != 0) {
                            //  The number of programs displayed on the last screen is the number of applications number_per_screen Seeking remainder 
                            return items.size() % NUMBER_PER_SCREEN;
                    }
                    //  Otherwise, the number of programs displayed on each screen is number_per_screen
                    return NUMBER_PER_SCREEN;
            }
    };

}

<?xml version="1.0" encoding="utf-8"?>

<!--  Define a Viewswitcher -->

<ViewSwitcher
    android:id="@+id/viewswitcher"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
</ViewSwitcher>
<!--  Define buttons to scroll to the previous screen  -->

<Button
    android:id="@+id/but01"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:onClick="prev"
    android:text="&amp;1t" />

<Button
    android:id="@+id/but02"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:onClick="next"
    android:text="&amp;gt" />

<?xml version="1.0" encoding="utf-8"?>

<ImageView
    android:id="@+id/image01"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

<TextView
    android:id="@+id/textview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center" />

<?xml version="1.0" encoding="utf-8"?>

<!--  Animate drag in from right ,duration Specify the duration of the animation  -->
<translate
    android:duration="@android:integer/config_mediumAnimTime"
    android:fromXDelta="100%p"
    android:toXDelta="0" />

<?xml version="1.0" encoding="utf-8"?>

<!--  Animate the drag in from the left ,duration Specify the duration of the animation  -->
<translate
    android:duration="@android:integer/config_mediumAnimTime"
    android:fromXDelta="-100%p"
    android:toXDelta="0" />

<?xml version="1.0" encoding="utf-8"?>