Benutzerdefinierte animation für viewpager

Arbeite ich mit viewPager und Fragmente und jetzt versuche ich, um eine benutzerdefinierte animation, die zoom-out-Seite transformation um genau zu sein.

Aber ich bin immer ein paar Fehler. Ich werde die Fehler im Kommentar, mit dem code-snippet.

Klasse MainActivity

import android.support.v4.app.FragmentManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.Menu;

public class MainActivity extends FragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);/** Getting a reference to the ViewPager defined the layout file */
        ViewPager pager = (ViewPager) findViewById(R.id.pager);

        /** Getting fragment manager */
        FragmentManager fm = getSupportFragmentManager();

        /** Instantiating FragmentPagerAdapter */
        MyFragmentPagerAdapter pagerAdapter = new MyFragmentPagerAdapter(fm);

        /** Setting the pagerAdapter to the pager object */
        pager.setAdapter(pagerAdapter);

        //**ERROR:The method setPageTransformer(boolean, ViewPager.PageTransformer) in the type ViewPager is not applicable for the arguments (boolean, ZoomOutPageTransformer)**
        pager.setPageTransformer(true, new ZoomOutPageTransformer());
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

Klasse ZoomOutPageTransformer

import android.view.View;
    //**ERROR on 'ViewPager.PageTransformer --> ViewPager cannot be resolved to a type **
    public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
        private static float MIN_SCALE = 0.85f;
        private static float MIN_ALPHA = 0.5f;

        public void transformPage(View view, float position) {
            int pageWidth = view.getWidth();
            int pageHeight = view.getHeight();

            if (position < -1) { //[-Infinity,-1)
                //This page is way off-screen to the left.
                view.setAlpha(0);

            } else if (position <= 1) { //[-1,1]
                //Modify the default slide transition to shrink the page as well
                float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
                float vertMargin = pageHeight * (1 - scaleFactor) / 2;
                float horzMargin = pageWidth * (1 - scaleFactor) / 2;
                if (position < 0) {
                    view.setTranslationX(horzMargin - vertMargin / 2);
                } else {
                    view.setTranslationX(-horzMargin + vertMargin / 2);
                }

                //Scale the page down (between MIN_SCALE and 1)
                view.setScaleX(scaleFactor);
                view.setScaleY(scaleFactor);

                //Fade the page relative to its size.
                view.setAlpha(MIN_ALPHA +
                        (scaleFactor - MIN_SCALE) /
                        (1 - MIN_SCALE) * (1 - MIN_ALPHA));

            } else { //(1,+Infinity]
                //This page is way off-screen to the right.
                view.setAlpha(0);
            }
        }
    }

InformationsquelleAutor mXX | 2013-03-17