android auto-switched ImageSwitcher

 

　　First,ImageSwitcher use setImageDrawable and setBackgroundDrawable to set the content.You'll need Timer class if you want to switch the content automatically.However,you can't change the UI content in a Timer,so you need a handler to send the message:

private Timer switchTimer;

private ImageSwitcher imageSwitcher;

private Handler mDownloadHandler = new Handler() {

            @Override

            public void dispatchMessage(Message msg) {

                switch (msg.what) {

                    case MSG_ADS_REFRESH:

                        int count=adsList.size();

                        if(count>0){

                            curads=(curads+1)%count;

                            Bitmap t=ImageUtilities.getCachedCover(adsList.get(curads).id);

                            imageSwitcher.setImageDrawable(new BitmapDrawable(t));

                        }

                        break;

                    default:

                        break;

                }

                super.dispatchMessage(msg);

            }

        };

@Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main)

        

        imageSwitcher=(ImageSwitcher)findViewById(R.id.store_main_ads);

        imageSwitcher.setFactory(new ViewFactory() {

            

            @Override

            public View makeView() {

                ImageView iv = new ImageView(StoreMainActivity.this);

                ImageSwitcher.LayoutParams lp=new ImageSwitcher.LayoutParams(

                        LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);

                lp.gravity=Gravity.CENTER;

                iv.setLayoutParams(lp);

                return iv;

            }

        });

        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in));

        imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out));

        adsList=new ArrayList<AdsImage>();

　　　　 switchTimer=new Timer();

        switchTimer.schedule(new TimerTask() {

            

            @Override

            public void run() {

                mDownloadHandler.sendEmptyMessage(MSG_ADS_REFRESH);

            }

        },10, 7000);

}

Don't forget to cancel the timer when you exit（ignore may be OK）：

  @Override

    protected void onDestroy() {

        switchTimer.cancel();

        super.onDestroy();

    }

 The adsList in code is the content list of the ImageSwitch.