Android编程之界面跳动提示动画效果实现方法

<relativelayout xmlns: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" >
 <relativelayout
  android:id="@+id/red"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#ff0000" >
  <textview
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_above="@+id/switch2blue"
   android:layout_centerhorizontal="true"
   android:text="首页" />
  <button
   android:id="@+id/switch2blue"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_centerinparent="true"
   android:text="置换位蓝色" />
 </relativelayout>
 <relativelayout
  android:id="@+id/blue"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="#0000ff" >
  <textview
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_above="@+id/switch2red"
   android:layout_centerhorizontal="true"
   android:text="第二页" />
  <button
   android:id="@+id/switch2red"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_alignparentbottom="true"
   android:layout_centerhorizontal="true"
   android:text="置换位红色" />
 </relativelayout>
</relativelayout>

import java.lang.reflect.field;
import android.app.activity;
import android.os.bundle;
import android.os.handler;
import android.util.displaymetrics;
import android.view.gesturedetector;
import android.view.motionevent;
import android.view.view;
import android.view.gesturedetector.ongesturelistener;
import android.view.view.onclicklistener;
import android.view.view.ontouchlistener;
import android.view.animation.acceleratedecelerateinterpolator;
import android.view.animation.accelerateinterpolator;
import android.view.animation.animation;
import android.view.animation.animationset;
import android.view.animation.translateanimation;
import android.view.animation.animation.animationlistener;
import android.widget.button;
import android.widget.relativelayout;
public class mainactivity extends activity implements onclicklistener,
  ontouchlistener, ongesturelistener {
 private relativelayout red, blue;
 private button switch2blue, switch2red;
 private float thisdelta = 0.05f;
 private static boolean haseverpulled = false;
 private boolean pulled = false;
 private static int height;
 private gesturedetector gesturedetector;
 private static int statusheight = 0;
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  displaymetrics metrics = getresources().getdisplaymetrics();
  height = metrics.heightpixels;
  statusheight = getstatusheight();
  initview();
  // 跳动提示可以上拉
  final handler handler = new handler();
  handler.postdelayed(new runnable() {
   @override
   public void run() {
    jump(thisdelta);
    // handler.postdelayed(this, 3000);
   }
  }, 3000);
 }
 private void initview() {
  red = (relativelayout) findviewbyid(r.id.red);
  blue = (relativelayout) findviewbyid(r.id.blue);
  switch2blue = (button) findviewbyid(r.id.switch2blue);
  switch2red = (button) findviewbyid(r.id.switch2red);
  switch2blue.setonclicklistener(this);
  switch2red.setonclicklistener(this);
  blue.setontouchlistener(this);
  blue.setlongclickable(true);
  gesturedetector = new gesturedetector(this, this);
 }
 @override
 public void onclick(view arg0) {
  // todo auto-generated method stub
  switch (arg0.getid()) {
  case r.id.switch2blue:
   red2blueui();
   break;
  case r.id.switch2red:
   blue2redui();
   break;
  }
 }
 // 从红页面转到蓝页面
 private void red2blueui() {
  blue.bringtofront();
  blue.requestlayout();
  blue.invalidate();
 }
 // 从蓝页面转到红页面
 private void blue2redui() {
  red.bringtofront();
  red.requestlayout();
  red.invalidate();
 }
 // 获取状态栏的高度
 private int getstatusheight() {
  class<?> c = null;
  object obj = null;
  field field = null;
  int x = 0;
  int height = 0;
  try {
   c = class.forname("com.android.internal.r$dimen");
   obj = c.newinstance();
   field = c.getfield("status_bar_height");
   x = integer.parseint(field.get(obj).tostring());
   height = getresources().getdimensionpixelsize(x);
  } catch (exception e) {
   e.printstacktrace();
  }
  return height;
 }
 // 主页面跳动
 private void jump(float delta) {
  if (thisdelta - 0.03f < 0.001f) {
   thisdelta = 0.05f;
   return;
  }
  thisdelta = delta;
  if (haseverpulled) {
   return;
  }
  playjumpanimation(thisdelta);
 }
 // 上拉/下拉主页面
 private void pull(boolean upward) {
  if (upward && pulled) {
   return;
  }
  if (!upward && !pulled) {
   return;
  }
  float originaly;
  float finaly;
  if (!pulled) {
   originaly = 0;
   finaly = (float) (0 - height + 0.4 * height);
  } else {
   originaly = (float) (0 - height + 0.4 * height);
   finaly = 0;
  }
  pulled = !pulled;
  animationset animationset = new animationset(true);
  animationset.addanimation(new translateanimation(0, 0, originaly,
    finaly));
  animationset.setduration(300);
  animationset.setinterpolator(new acceleratedecelerateinterpolator());
  animationset.setfillafter(true);
  animationset.setanimationlistener(new animationlistener() {
   @override
   public void onanimationstart(animation animation) {
    if (!pulled) {
     red2blueui();
    }
   }
   @override
   public void onanimationrepeat(animation animation) {
   }
   @override
   public void onanimationend(animation animation) {
    // if (pulled) {
    // blue2redui();
    // }
   }
  });
  blue.startanimation(animationset);
  haseverpulled = true;
 }
 // 跳起动画
 private void playjumpanimation(final float delta) {
  float originaly = 0;
  float finaly = 0 - height * delta;
  animationset animationset = new animationset(true);
  animationset.addanimation(new translateanimation(0, 0, originaly,
    finaly));
  animationset.setduration(300);
  animationset.setinterpolator(new acceleratedecelerateinterpolator());
  animationset.setfillafter(true);
  animationset.setanimationlistener(new animationlistener() {
   @override
   public void onanimationstart(animation animation) {
   }
   @override
   public void onanimationrepeat(animation animation) {
   }
   @override
   public void onanimationend(animation animation) {
    playlandanimation(delta);
   }
  });
  blue.startanimation(animationset);
 }
 // 落下动画
 private void playlandanimation(final float delta) {
  float originaly = 0 - height * delta;
  float finaly = 0;
  animationset animationset = new animationset(true);
  animationset.addanimation(new translateanimation(0, 0, originaly,
    finaly));
  animationset.setduration(200);
  animationset.setinterpolator(new accelerateinterpolator());
  animationset.setfillafter(true);
  animationset.setanimationlistener(new animationlistener() {
   @override
   public void onanimationstart(animation animation) {
   }
   @override
   public void onanimationrepeat(animation animation) {
   }
   @override
   public void onanimationend(animation animation) {
    jump(0.03f);
   }
  });
  blue.startanimation(animationset);
 }
 @override
 public boolean ondown(motionevent e) {
  pull(false);
  return false;
 }
 @override
 public boolean onfling(motionevent e1, motionevent e2, float velocityx,
   float velocityy) {
  // 手势滑动达到100才触发
  if (e1.gety() - e2.gety() > 100) {
   pull(true);
  } else if (e2.gety() >= e1.gety()) {
   pull(false);
  }
  return false;
 }
 @override
 public void onlongpress(motionevent e) {
 }
 @override
 public boolean onscroll(motionevent e1, motionevent e2, float distancex,
   float distancey) {
  return false;
 }
 @override
 public void onshowpress(motionevent e) {
 }
 @override
 public boolean onsingletapup(motionevent e) {
  return false;
 }
 @override
 public boolean ontouch(view v, motionevent event) {
  if (pulled) {
   // 首张页可触控点
   if (event.gety() > height * 0.4 - statusheight) {
    return false;
   }
  }
  return gesturedetector.ontouchevent(event);
 }
}