public void setAlphaAnimation(){

   //生成AlphaAnimation的對(duì)象

   AlphaAnimation animation= new AlphaAnimation(this);

   //設(shè)置動(dòng)畫(huà)的持續(xù)時(shí)間

   animation.setDuration(3000);

   //給要漸變的控件設(shè)置動(dòng)畫(huà)，比如說(shuō)imageview，textview，linearLayout之類(lèi)的

   ll.setAnimation(animation);

   //設(shè)置動(dòng)畫(huà)監(jiān)聽(tīng)，結(jié)束時(shí)跳轉(zhuǎn)到下一個(gè)頁(yè)面（首次打開(kāi)就是引導(dǎo)頁(yè)面，反之就是主頁(yè)）

   animation.setAnimationListener(new Animation.AnimationListener(){

      public void onAnimationStart(Animation animation){ }

      public void onAnimationEnd(Animation animation){ 

         jump2Activity();      

      }

      public void onAnimationRepeat(Animation animation){ }

   });

}

public void jump2Activity(){

  SharedPreferences sharedPreference= getSharedPreferences("data", MODE_PRIVATE);

  String isFirst= sharedPreferences.getString("isFirst", "0");

  Intent intent= new Intent();  

  if("0".equals(isFirst)){

    intent.setClass(this, GuideActivity.class);

  }else{

    intent.setClass(this. MainActivity.class);

  }

  startActivity(intent);

  finish();

}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent">
 
 <android.support.v4.view.ViewPager
  android:id="@+id/guide_vp"
  android:layout_width="match_parent"
  android:layout_height="match_parent" />
 
 <LinearLayout
  android:id="@+id/guide_ll"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_alignParentBottom="true"
  android:layout_centerHorizontal="true"
  android:layout_marginBottom="100dp"
  android:orientation="horizontal" />
 
 <Button
  android:id="@+id/guide_btn"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_above="@id/guide_ll"
  android:layout_centerHorizontal="true"
  android:text="進(jìn)入應(yīng)用"
  android:layout_marginBottom="10dp"
  android:visibility="gone"/>
 
</RelativeLayout>

/**
 * 初始化圖片
 */
private void initImgs() {
 ViewPager.LayoutParams params= new ViewPager.LayoutParams();
 imageViews= new ArrayList<ImageView>();
 for (int i= 0; i< imgs.length; i++){
  ImageView imageView= new ImageView(this);
  imageView.setLayoutParams(params);
  imageView.setImageResource(imgs[i]);
  imageView.setScaleType(ImageView.ScaleType.FIT_XY);
  imageViews.add(imageView);
 }
}

/**
 * 初始化底部圓點(diǎn)指示器
 */
private void initDots() {
 LinearLayout layout= findViewById(R.id.guide_ll);
 LinearLayout.LayoutParams params= new LinearLayout.LayoutParams(20, 20);
 params.setMargins(10, 0, 10, 0);
 dotViews= new ImageView[imgs.length];
 for (int i= 0; i< imageViews.size(); i++){
  ImageView imageView= new ImageView(this);
  imageView.setLayoutParams(params);
  imageView.setImageResource(R.drawable.dotselector);
  if (i== 0){
   imageView.setSelected(true);
  }else{
   imageView.setSelected(false);
  }
  dotViews[i]= imageView;
  final int finalI = i;
  dotViews[i].setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    vp.setCurrentItem(finalI);
   }
  });
  layout.addView(imageView);
 }
}

vp.addOnPageChangeListener(this);

@Override
public void onPageScrolled(int i, float v, int i1) {}
 
@Override 
public void onPageScrollStateChanged(int i) {}
 
@Override
public void onPageSelected(int arg0) {
 for (int i= 0; i< dotViews.length; i++){
  if (arg0== i){
   dotViews[i].setSelected(true);
  }else {
   dotViews[i].setSelected(false);
  }
 
  if (arg0== dotViews.length- 1){
   btn.setVisibility(View.VISIBLE);
  }else {
   btn.setVisibility(View.GONE);
  }
 }
}

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:drawable="@drawable/focus_on" android:state_selected="true"/>
 <item android:drawable="@drawable/focus_nomal" android:state_selected="false"/>
</selector>

@Override
public void onClick(View view) {
 switch (view.getId()){
  case R.id.guide_btn:
   setisFirst();
   Intent intent= new Intent(GuideActivity.this, MainActivity.class);
   startActivity(intent);
   finish();
   break;
 }
}
/**
 * 改變首次打開(kāi)的狀態(tài)
 */
private void setisFirst() {
 SharedPreferences.Editor editor= getSharedPreferences("data", MODE_PRIVATE).edit();
 editor.putString("isFirst", "1");
 editor.commit();
}