Android's Imageswitcher

Points:

(View API Summary)

1:imageswitcher inherit Viewswitcher, (Viewswitcher has inheritance framelayout)

2: To implement the cut graph must implement the Makeview () in the Viewswitcher.viewfactory interface

Easy Error Point:

1:

Mimageswitcher.setfactory (this);
Mimageswitcher.setimageresource (Mimages[0]);

Setimageresource must be called after setfactory. Reason: According to the source code analysis call Setfactory get interface, can

Gets the view returned by Makeview () otherwise throws a null pointer exception

2: Set layout parameters in Makeview with framelayout layout parameters

Package Com.imageswitcher;import Android.app.activity;import Android.os.bundle;import android.util.Log;import Android.view.view;import Android.view.viewgroup;import Android.view.animation.animationutils;import Android.widget.framelayout;import Android.widget.imageswitcher;import Android.widget.imageview;import Android.widget.linearlayout;import Android.widget.toast;import Android.widget.viewswitcher;public Class    Mainactivity extends Activity implements Viewswitcher.viewfactory {private LinearLayout mlinearlayout;    Private Imageswitcher Mimageswitcher;            Private integer[] Mimages = {r.drawable.android01, r.drawable.android02, R.DRAWABLE.ANDROID03, R.DRAWABLE.ANDROID04,    R.DRAWABLE.ANDROID05, R.drawable.android06, r.drawable.android07, r.drawable.android08, R.drawable.android09};        @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_main);        Initview (); MimageswiTcher.setfactory (this);        Mimageswitcher.setimageresource (Mimages[0]); Mimageswitcher.setinanimation (Animationutils.loadanimation (this, Android.        r.anim.fade_in)); Mimageswitcher.setoutanimation (Animationutils.loadanimation (this, Android.        R.anim.fade_out));        for (int i = 0; i < mimages.length; i++) {Mlinearlayout.addview (Getimageview (i));        }} private ImageView Getimageview (final int i) {ImageView ImageView = new ImageView (this);        Imageview.setimageresource (Mimages[i]);        Imageview.setid (i);                Imageview.setonclicklistener (New View.onclicklistener () {@Override public void OnClick (View v) {                Mimageswitcher.setimageresource (Mimages[i]);            Toast.maketext (V.getcontext (), "selected" + (V.getid () + 1) + "map", Toast.length_short). Show ();        }        });    return imageView; } private void Initview () {mlinearlayout = (linearlayout) Findviewbyid (R.id.linEarlayout);    Mimageswitcher = (imageswitcher) Findviewbyid (R.id.imageswitcher);        } @Override Public View Makeview () {ImageView ImageView = new ImageView (this);        LOG.I (MainActivity.class.getSimpleName (), "First Call"); Imageview.setlayoutparams (New Framelayout.layoutparams (ViewGroup.LayoutParams.MATCH_PARENT, viewgroup.layou        Tparams.match_parent));    return imageView; }}

　　

Xml

<Relativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"Tools:context=". Mainactivity ">    <ImageswitcherAndroid:id= "@+id/imageswitcher"Android:layout_width= "Match_parent"Android:layout_height= "200DP">            </Imageswitcher>    <HorizontalscrollviewAndroid:layout_below= "@id/imageswitcher"Android:layout_width= "Match_parent"Android:layout_height= "100DP"        >                <LinearLayoutAndroid:id= "@+id/linearlayout"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"android:orientation= "Horizontal">        </LinearLayout>            </Horizontalscrollview></Relativelayout>

Android's Imageswitcher