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); }}