仿百度壁纸客户端（五）——实现搜索动画GestureDetector手势识别，动态更新搜索关键字

百度壁纸系列

仿百度壁纸客户端（一）——主框架搭建,自定义Tab + ViewPager + Fragment

仿百度壁纸客户端（二）——主页自定义ViewPager广告定时轮播图

仿百度壁纸客户端（三）——首页单向，双向事件冲突处理，壁纸列表的实现

仿百度壁纸客户端（四）——自定义上拉加载实现精选壁纸墙

仿百度壁纸客户端（五）——实现搜索动画GestureDetector手势识别，动态更新搜索关键字

仿百度壁纸客户端（六）——完结篇之Gallery画廊实现壁纸预览已经项目细节优化

我们重新来看看这个效果

想实现这个逻辑，其实就是监听两个View的显示隐藏加上一点小动画，所以我们在布局上是这样的

search_fragment.xml

<?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"><AbsoluteLayout
        android:id="@+id/myLayoutOne"android:layout_width="match_parent"android:layout_height="match_parent"></AbsoluteLayout><AbsoluteLayout
        android:id="@+id/myLayoutTwo"android:layout_width="match_parent"android:layout_height="match_parent"android:visibility="gone"></AbsoluteLayout></RelativeLayout>

这两个布局我们去填充数据，首先我们把要初始化的东西都初始化好

/*** 找控件** @param view*/private void findView(View view) {//设置触摸，手势view.setLongClickable(true);view.setOnTouchListener(new MyOnTouch());//初始化手势gest = new GestureDetector(getActivity(), new MyGest());myLayoutOne = (AbsoluteLayout) view.findViewById(R.id.myLayoutOne);myLayoutTwo = (AbsoluteLayout) view.findViewById(R.id.myLayoutTwo);}

紧接着我们就可以去获取相应的数据了

/*** 初始化*/private void init() {//获取屏幕的像素，后续随机分布关键字DisplayMetrics metrics = new DisplayMetrics();getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);//获取到屏幕的宽mWidth = metrics.widthPixels;//初始化数据initData();//设置默认数据setData(myLayoutOne, index);}**重点内容**

获取到数据之后我们就开始初始化这些数据

/*** 初始化数据*/private void initData() {//两个页面for (int i = 0; i < 2; i++) {switch (i) {case 0:ArrayList<String> newDataOne = new ArrayList<>();//15个数据for (int j = 0; j < 15; j++) {//实际开发中数据还是得从服务器获取newDataOne.add("海贼王");}//添加数据data.add(newDataOne);break;case 1:ArrayList<String> newDataTwo = new ArrayList<>();//15个数据for (int j = 0; j < 15; j++) {newDataTwo.add("火影忍者");}//添加数据data.add(newDataTwo);break;}}}

这样我们就可以来进行随机分布的计算

/*** 设置默认的数据** @param myLayout* @param index*/private void setData(AbsoluteLayout myLayout, int index) {//每次加载之前清除myLayout.removeAllViews();//有数据了之后开始随机分布了int startY = 50;//X动态生成,判断是第几页的数据，左右两边间距50，用户体验for (int i = 0; i < data.get(index).size(); i++) {int x = get(50, mWidth - 50);int y = startY;//文本显示TextView tv = new TextView(getActivity());tv.setTextSize(12);//随机tv.setText(data.get(index).get(i));/*** 高，宽，x,y*/AbsoluteLayout.LayoutParams layout = new AbsoluteLayout.LayoutParams(100, 50, x, y);myLayout.addView(tv, layout);//开始随机分布startY += 50;}}/*** 随机生成一个坐标** @param min* @param max* @return*/private int get(int min, int max) {//从最大到最小的随机数值return new Random().nextInt(max) % (max - min + 1) + min;}

当我们要添加手势的时候，我们就可以把触摸事件传递给手势事件

 /*** View的触摸事件*/private class MyOnTouch implements View.OnTouchListener {@Overridepublic boolean onTouch(View v, MotionEvent event) {//触摸事件传递给手势return gest.onTouchEvent(event);}}

接着我们来处理滑产生的操作

/*** 手势监听*/private class MyGest implements GestureDetector.OnGestureListener {//按下@Overridepublic boolean onDown(MotionEvent e) {return false;}@Overridepublic void onShowPress(MotionEvent e) {}@Overridepublic boolean onSingleTapUp(MotionEvent e) {return false;}@Overridepublic boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {return false;}@Overridepublic void onLongPress(MotionEvent e) {}//滑动@Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {//左边——右边滑动if (e1.getX() < e2.getX()) {index++;//越界处理if (index == data.size()) {index = 0;}//判断显示内容switch (myLayoutOne.getVisibility()) {//VISIBLEcase 0://动画并且显示，消失setState(VISIBLE);setState(GONE);break;//INVISIBLEcase 4://GONEcase 8://动画并且显示，消失setState(VISIBLE1);setState(GONE1);break;}}return false;}}

我们只要去动态的改变他的UI，所以，这里我们写了这样一个方法

/*** 动态改变状态** @param i*/private void setState(final int i) {//UI刷新new Thread(new Runnable() {@Overridepublic void run() {handler.sendEmptyMessage(i);}}).start();}

当接收到handler的时候

/*** 子线程*/private Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case VISIBLE:setAnim(myLayoutOne, 1000, 0);myLayoutOne.setVisibility(View.GONE);break;case GONE:setData(myLayoutTwo,index);setAnimTwo(myLayoutTwo, 2000, 0);myLayoutTwo.setVisibility(View.VISIBLE);break;case VISIBLE1:setAnimTwo(myLayoutTwo, 2000, 0);myLayoutTwo.setVisibility(View.VISIBLE);break;case GONE1:setData(myLayoutOne,index);setAnim(myLayoutOne, 1000, 0);myLayoutOne.setVisibility(View.GONE);break;}super.handleMessage(msg);}};

我们就可以进行动画了，无非就是两个视图动画，他们的坐标刚好相反

 * 设置Two动画** @param myLayout  控件* @param time      显示时间* @param deLayTime 延迟时间*/private void setAnimTwo(AbsoluteLayout myLayout, int time, int deLayTime) {//缩放动画ScaleAnimation scale = new ScaleAnimation(0.0f, 1.0f, 0.0f, 1.0f, Animation.RELATIVE_TO_PARENT, 0.5f, Animation.RELATIVE_TO_PARENT, 0.5f);scale.setDuration(time);scale.setStartOffset(deLayTime);//渐变AlphaAnimation alp = new AlphaAnimation(0.0f, 1.0f);alp.setDuration(time);alp.setStartOffset(deLayTime);//组合动画AnimationSet set = new AnimationSet(true);set.addAnimation(scale);set.addAnimation(alp);//开始动画myLayout.startAnimation(set);}/*** 设置One动画** @param myLayout  控件* @param time      显示时间* @param deLayTime 延迟时间*/private void setAnim(AbsoluteLayout myLayout, int time, int deLayTime) {//缩放动画ScaleAnimation scale = new ScaleAnimation(1.0f, 1.5f, 1.0f, 1.5f, Animation.RELATIVE_TO_PARENT, 0.5f, Animation.RELATIVE_TO_PARENT, 0.5f);scale.setDuration(time);scale.setStartOffset(deLayTime);//渐变AlphaAnimation alp = new AlphaAnimation(1.0f, 0.0f);alp.setDuration(time);alp.setStartOffset(deLayTime);//组合动画AnimationSet set = new AnimationSet(true);set.addAnimation(scale);set.addAnimation(alp);//开始动画myLayout.startAnimation(set);}

这里贴上完整代码，Demo就不上传了，xml和代码都有，直接放上去就行

SearchFragment

package com.lgl.baiduwallpaper.fragment;import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.Fragment;
import android.util.DisplayMetrics;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.ScaleAnimation;
import android.widget.AbsoluteLayout;
import android.widget.TextView;import com.lgl.baiduwallpaper.R;import java.util.ArrayList;
import java.util.Random;/*** 搜索* Created by lgl on 16/3/31.*/
public class SearchFragment extends Fragment {//显示private static final int VISIBLE = 1;//隐藏private static final int GONE = 2;//显示private static final int VISIBLE1 = 3;//隐藏private static final int GONE1 = 4;private AbsoluteLayout myLayoutOne, myLayoutTwo;//标记private int index = 0;//进行数据存储private ArrayList<ArrayList<String>> data = new ArrayList<ArrayList<String>>();//屏幕的宽private int mWidth;//手势private GestureDetector gest;/*** 子线程*/private Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case VISIBLE:setAnim(myLayoutOne, 1000, 0);myLayoutOne.setVisibility(View.GONE);break;case GONE:setData(myLayoutTwo,index);setAnimTwo(myLayoutTwo, 2000, 0);myLayoutTwo.setVisibility(View.VISIBLE);break;case VISIBLE1:setAnimTwo(myLayoutTwo, 2000, 0);myLayoutTwo.setVisibility(View.VISIBLE);break;case GONE1:setData(myLayoutOne,index);setAnim(myLayoutOne, 1000, 0);myLayoutOne.setVisibility(View.GONE);break;}super.handleMessage(msg);}};/*** 设置Two动画** @param myLayout  控件* @param time      显示时间* @param deLayTime 延迟时间*/private void setAnimTwo(AbsoluteLayout myLayout, int time, int deLayTime) {//缩放动画ScaleAnimation scale = new ScaleAnimation(0.0f, 1.0f, 0.0f, 1.0f, Animation.RELATIVE_TO_PARENT, 0.5f, Animation.RELATIVE_TO_PARENT, 0.5f);scale.setDuration(time);scale.setStartOffset(deLayTime);//渐变AlphaAnimation alp = new AlphaAnimation(0.0f, 1.0f);alp.setDuration(time);alp.setStartOffset(deLayTime);//组合动画AnimationSet set = new AnimationSet(true);set.addAnimation(scale);set.addAnimation(alp);//开始动画myLayout.startAnimation(set);}/*** 设置One动画** @param myLayout  控件* @param time      显示时间* @param deLayTime 延迟时间*/private void setAnim(AbsoluteLayout myLayout, int time, int deLayTime) {//缩放动画ScaleAnimation scale = new ScaleAnimation(1.0f, 1.5f, 1.0f, 1.5f, Animation.RELATIVE_TO_PARENT, 0.5f, Animation.RELATIVE_TO_PARENT, 0.5f);scale.setDuration(time);scale.setStartOffset(deLayTime);//渐变AlphaAnimation alp = new AlphaAnimation(1.0f, 0.0f);alp.setDuration(time);alp.setStartOffset(deLayTime);//组合动画AnimationSet set = new AnimationSet(true);set.addAnimation(scale);set.addAnimation(alp);//开始动画myLayout.startAnimation(set);}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {View view = inflater.inflate(R.layout.search_fragment, container, false);findView(view);return view;}/*** 找控件** @param view*/private void findView(View view) {//设置触摸，手势view.setLongClickable(true);view.setOnTouchListener(new MyOnTouch());//初始化手势gest = new GestureDetector(getActivity(), new MyGest());myLayoutOne = (AbsoluteLayout) view.findViewById(R.id.myLayoutOne);myLayoutTwo = (AbsoluteLayout) view.findViewById(R.id.myLayoutTwo);}@Overridepublic void onActivityCreated(Bundle savedInstanceState) {super.onActivityCreated(savedInstanceState);init();}/*** 初始化*/private void init() {//获取屏幕的像素，后续随机分布关键字DisplayMetrics metrics = new DisplayMetrics();getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);//获取到屏幕的宽mWidth = metrics.widthPixels;//初始化数据initData();//设置默认数据setData(myLayoutOne, index);}/*** 初始化数据*/private void initData() {//两个页面for (int i = 0; i < 2; i++) {switch (i) {case 0:ArrayList<String> newDataOne = new ArrayList<>();//15个数据for (int j = 0; j < 15; j++) {//实际开发中数据还是得从服务器获取newDataOne.add("海贼王");}//添加数据data.add(newDataOne);break;case 1:ArrayList<String> newDataTwo = new ArrayList<>();//15个数据for (int j = 0; j < 15; j++) {newDataTwo.add("火影忍者");}//添加数据data.add(newDataTwo);break;}}}/*** 设置默认的数据** @param myLayout* @param index*/private void setData(AbsoluteLayout myLayout, int index) {//每次加载之前清除myLayout.removeAllViews();//有数据了之后开始随机分布了int startY = 50;//X动态生成,判断是第几页的数据，左右两边间距50，用户体验for (int i = 0; i < data.get(index).size(); i++) {int x = get(50, mWidth - 50);int y = startY;//文本显示TextView tv = new TextView(getActivity());tv.setTextSize(12);//随机tv.setText(data.get(index).get(i));/*** 高，宽，x,y*/AbsoluteLayout.LayoutParams layout = new AbsoluteLayout.LayoutParams(100, 50, x, y);myLayout.addView(tv, layout);//开始随机分布startY += 50;}}/*** 随机生成一个坐标** @param min* @param max* @return*/private int get(int min, int max) {//从最大到最小的随机数值return new Random().nextInt(max) % (max - min + 1) + min;}/*** View的触摸事件*/private class MyOnTouch implements View.OnTouchListener {@Overridepublic boolean onTouch(View v, MotionEvent event) {//触摸事件传递给手势return gest.onTouchEvent(event);}}/*** 手势监听*/private class MyGest implements GestureDetector.OnGestureListener {//按下@Overridepublic boolean onDown(MotionEvent e) {return false;}@Overridepublic void onShowPress(MotionEvent e) {}@Overridepublic boolean onSingleTapUp(MotionEvent e) {return false;}@Overridepublic boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {return false;}@Overridepublic void onLongPress(MotionEvent e) {}//滑动@Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {//左边——右边滑动if (e1.getX() < e2.getX()) {index++;//越界处理if (index == data.size()) {index = 0;}//判断显示内容switch (myLayoutOne.getVisibility()) {//VISIBLEcase 0://动画并且显示，消失setState(VISIBLE);setState(GONE);break;//INVISIBLEcase 4://GONEcase 8://动画并且显示，消失setState(VISIBLE1);setState(GONE1);break;}}return false;}}/*** 动态改变状态** @param i*/private void setState(final int i) {//UI刷新new Thread(new Runnable() {@Overridepublic void run() {handler.sendEmptyMessage(i);}}).start();}
}

我们来运行一下

这里有个隐藏小bug，不知各位看官可否发现了其中的小失误，哈哈