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（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 {

@Override
public 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
@Override
public boolean onDown(MotionEvent e) {
return false;
}

@Override
public void onShowPress(MotionEvent e) {

}

@Override
public boolean onSingleTapUp(MotionEvent e) {
return false;
}

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
return false;
}

@Override
public void onLongPress(MotionEvent e) {

}

//滑动
@Override
public 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()) {
//VISIBLE
case 0:
//动画并且显示，消失
setState(VISIBLE);
setState(GONE);
break;
//INVISIBLE
case 4:
//GONE
case 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() {
@Override
public void run() {
handler.sendEmptyMessage(i);
}
}).start();
}

当接收到handler的时候

/**
* 子线程
*/
private Handler handler = new Handler() {
@Override
public 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() {
@Override
public 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);
}

@Override
public 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);
}

@Override
public 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 {

@Override
public 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
@Override
public boolean onDown(MotionEvent e) {
return false;
}

@Override
public void onShowPress(MotionEvent e) {

}

@Override
public boolean onSingleTapUp(MotionEvent e) {
return false;
}

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
return false;
}

@Override
public void onLongPress(MotionEvent e) {

}

//滑动
@Override
public 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()) {
//VISIBLE
case 0:
//动画并且显示，消失
setState(VISIBLE);
setState(GONE);
break;
//INVISIBLE
case 4:
//GONE
case 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() {
@Override
public 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