android ViewPager实现滑动翻页效果实例代码

importandroid.content.Context;

importandroid.support.v4.view.ViewPager;

importandroid.util.AttributeSet;

importandroid.view.View;

publicclassReadViewPagerextendsViewPager

{

  publicReadViewPager(Context context)

  {

    super(context);

  }

  publicReadViewPager(Context context, AttributeSet attrs)

  {

    super(context, attrs);

    setAnima();

  }

  publicvoidsetAnima()

  {

    setPageTransformer(true,newPageTransformer()

    {

      privatestaticfinalfloatMIN_SCALE =0.75f;

      @Override

      publicvoidtransformPage(View view,floatposition)

      {

        intpageWidth = view.getWidth();

        intpageHeight =view.getHeight();

        if(position < -1)

        {

          // [-Infinity,-1)

          // This page is way off-screen to the left.

          view.setAlpha(0);

        }

        elseif(position <=0)

        {

          // [-1,0]

          // Use the default slide transition when moving to the left page

          view.setAlpha(1);

          view.setTranslationX(0);

          view.setScaleX(1);

          view.setScaleY(1);

        }

        elseif(position <=1)

        {

          // (0,1]

          // Fade the page out.

          view.setAlpha(1- position);

//

//          // Counteract the default slide transition

//          view.setAlpha(1);

          view.setTranslationX(pageWidth * -position);

//

//          // Scale the page down (between MIN_SCALE and 1)

          floatscaleFactor = MIN_SCALE

              + (1- MIN_SCALE) * (1- Math.abs(position));

          view.setScaleX(scaleFactor);

          view.setScaleY(scaleFactor);

        }

        else

        {

          // (1,+Infinity]

          // This page is way off-screen to the right.

          view.setAlpha(0);

        }

      }

    });

  }

}

setPageTransformer(true,newPageTransformer() {

      privatestaticfinalfloatMIN_SCALE =0.75f;

      @Override

      publicvoidtransformPage(View view,floatposition) {

        intpageWidth = view.getWidth();

         intpageHeight =view.getHeight();

        if(position < -1) {// [-Infinity,-1)

          // This page is way off-screen to the left.

          view.setAlpha(0);

        }elseif(position <=0) {// [-1,0]

          // Use the default slide transition when moving to the left page

          view.setAlpha(1);

          view.setTranslationX(0);

          view.setScaleX(1);

          view.setScaleY(1);

        }elseif(position <=1) {// (0,1]

          // Fade the page out.

//          view.setAlpha(1 - position);

//

//          // Counteract the default slide transition

          view.setAlpha(1);

          view.setTranslationX(pageWidth * -position);

//

//          // Scale the page down (between MIN_SCALE and 1)

//          float scaleFactor = MIN_SCALE

//              + (1 - MIN_SCALE) * (1 - Math.abs(position));

//          view.setScaleX(scaleFactor);

//          view.setScaleY(scaleFactor);

        }else{// (1,+Infinity]

          // This page is way off-screen to the right.

          view.setAlpha(0);

        }

      }

    });

packagecom.yctime.truelove.fragment;

importandroid.content.Context;

importandroid.nfc.Tag;

importandroid.os.Bundle;

importandroid.support.annotation.Nullable;

importandroid.support.v4.app.Fragment;

importandroid.util.Log;

importandroid.view.LayoutInflater;

importandroid.view.View;

importandroid.view.ViewGroup;

/**

 * 基类Fragment

 */

publicabstractclassBaseFragmentextendsFragment {

  protectedView mRootView;

  publicContext mContext;

  protectedbooleanisVisible;

  privatebooleanisPrepared;

  privatebooleanisFirst =true;

  publicBaseFragment() {

    // Required empty public constructor

  }

  @Override

  publicvoidsetUserVisibleHint(booleanisVisibleToUser) {

    super.setUserVisibleHint(isVisibleToUser);

//    Log.d("TAG", "fragment->setUserVisibleHint");

    if(getUserVisibleHint()) {

      isVisible =true;

      lazyLoad();

    }else{

      isVisible =false;

      onInvisible();

    }

  }

  @Override

  publicvoidonCreate(@NullableBundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    mContext = getActivity();

    setHasOptionsMenu(true);

//    Log.d("TAG", "fragment->onCreate");

  }

  @Override

  publicView onCreateView(LayoutInflater inflater, ViewGroup container,

               Bundle savedInstanceState) {

    if(mRootView ==null) {

      mRootView = initView();

    }

//    Log.d("TAG", "fragment->onCreateView");

    returnmRootView;

  }

  @Override

  publicvoidonActivityCreated(@NullableBundle savedInstanceState) {

    super.onActivityCreated(savedInstanceState);

//    Log.d("TAG", "fragment->onActivityCreated");

    isPrepared =true;

    lazyLoad();

  }

  protectedvoidlazyLoad() {

    if(!isPrepared || !isVisible || !isFirst) {

      return;

    }

    Log.d("TAG", getClass().getName() +"->initData()");

    initData();

    isFirst =false;

  }

  //do something

  protectedvoidonInvisible() {

  }

  publicabstractView initView();

  publicabstractvoidinitData();

}

protectedvoidlazyLoad() {

  if(!isPrepared || !isVisible || !isFirst) {

    return;

  }

  Log.d("TAG", getClass().getName() +"->initData()");

  initData();

  isFirst =false;

}

keytool -list -v -keystore 证书地址

PS:如果需要获取debug版本的证书，按如下例子查找即可

keytool -list -v -keystore C:\Users\HLQ\ .android\debug.keystore

默认密码为：android

C:\Users\HLQ\Desktop\hlq_test.jks

compileOptions {

 sourceCompatibility JavaVersion.VERSION_1_8

 targetCompatibility JavaVersion.VERSION_1_8

}