Android模仿QQ的左右滑动切换界面和下拉更新的效果
16lz
2021-01-24
转自http://www.linuxidc.com/Linux/2012-08/67207.htm
主布局main.xml
- <?xmlversion="1.0"encoding="utf-8"?>
- <LinearLayoutxmlns:Android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical">
- <HorizontalScrollView
- android:id="@+id/horizontalscrollview"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:background="@drawable/item"
- android:fadingEdge="@null"
- android:scrollbars="none">
- <LinearLayout
- android:id="@+id/linearlayout"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="horizontal"
- >
- </LinearLayout>
- </HorizontalScrollView>
- <android.support.v4.view.ViewPager
- android:id="@+id/viewpaper"
- android:layout_width="fill_parent"
- android:layout_height="match_parent"
- android:layout_weight="1">
- </android.support.v4.view.ViewPager>
- </LinearLayout>
2,接着看看QQonline.xml
- <?xmlversion="1.0"encoding="utf-8"?>
- <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical"
- android:background="@drawable/image2">
- <ExpandableListView
- android:id="@+id/elistview"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_marginLeft="5dp"
- />
- </LinearLayout>
3.接着看看下拉更新的布局pullrefresh.xml
- <?xmlversion="1.0"encoding="utf-8"?>
- <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:background="@drawable/image1"
- android:orientation="vertical">
- <com.wang.pullrefresh.MyListView
- android:id="@+id/listView"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"/>
- </LinearLayout>
- <?xmlversion="1.0"encoding="utf-8"?>
- <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content">
- <RelativeLayout
- android:id="@+id/head_contentLayout"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:paddingLeft="30dp">
- <FrameLayout
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_centerVertical="true">
- <ImageView
- android:id="@+id/head_arrowImageView"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_gravity="center"
- android:src="@drawable/down"/>
- <ProgressBar
- android:id="@+id/head_progressBar"
- style="?android:attr/progressBarStyleSmall"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_gravity="center"
- android:visibility="gone"/>
- </FrameLayout>
- <LinearLayout
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerHorizontal="true"
- android:gravity="center_horizontal"
- android:orientation="vertical">
- <TextView
- android:id="@+id/head_tipsTextView"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="下拉可以刷新"
- android:textSize="15dp"/>
- <TextView
- android:id="@+id/head_lastUpdatedTextView"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="上次更新时间:"
- android:textSize="12dp"/>
- </LinearLayout>
- </RelativeLayout>
- </LinearLayout>
- <?xmlversion="1.0"encoding="utf-8"?>
- <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:gravity="center_vertical"
- android:orientation="horizontal">
- <ImageView
- android:id="@+id/imageView_item"
- android:layout_width="60dp"
- android:layout_height="60dp"
- android:layout_marginLeft="5dp"
- android:src="@drawable/qq"/>
- <TextView
- android:id="@+id/textView_item"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginLeft="10dp"
- android:textColor="#FFFFFF"
- />
- </LinearLayout>
- <?xmlversion="1.0"encoding="utf-8"?>
- <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical"
- android:background="@drawable/image3">
- </LinearLayout>
7.接着看看主活动的实现过程ViewPaper1Activity.java
- packagecom.wang;
- importjava.util.ArrayList;
- importandroid.app.ActivityGroup;
- importandroid.content.Intent;
- importandroid.graphics.Bitmap;
- importandroid.graphics.BitmapFactory;
- importandroid.graphics.drawable.BitmapDrawable;
- importandroid.os.Bundle;
- importandroid.support.v4.view.PagerAdapter;
- importandroid.support.v4.view.ViewPager;
- importandroid.support.v4.view.ViewPager.OnPageChangeListener;
- importandroid.view.Gravity;
- importandroid.view.View;
- importandroid.view.Window;
- importandroid.view.WindowManager;
- importandroid.view.View.OnClickListener;
- importandroid.widget.HorizontalScrollView;
- importandroid.widget.LinearLayout;
- importandroid.widget.RadioButton;
- importandroid.widget.RadioGroup;
- importandroid.widget.TextView;
- importandroid.widget.LinearLayout.LayoutParams;
- publicclassViewPaper1ActivityextendsActivityGroupimplements
- OnClickListener{
- privateRadioGroupradioGroup;
- privateStringarray[]={"QQ空间","QQ","QQ消息"};
- privateLinearLayoutlinearLayout;
- privateArrayList<TextView>textViews;
- privateViewPagerviewPager;
- privateArrayList<View>pageViews;
- privateHorizontalScrollViewhorizontalScrollView;
- /***
- *初始化视图
- *
- *
- */
- voidInItView(){
- //构造一个新的ArrayList实例对象
- pageViews=newArrayList<View>();
- /**
- * 开始一个新的活动中运行的组织。每一个活动你开始必须有一个独一无二的字符串标识与其相关联
- ***/
- Viewview1=getLocalActivityManager().startActivity("main1",
- newIntent(this,pullrefreshtest.class)).getDecorView();
- Viewview2=getLocalActivityManager().startActivity("main2",
- newIntent(this,QQonline.class)).getDecorView();
- Viewview3=getLocalActivityManager().startActivity("main3",
- newIntent(this,main3.class)).getDecorView();
- //添加指定的对象在文章末尾的ArrayList。
- pageViews.add(view1);
- pageViews.add(view2);
- pageViews.add(view3);
- }
- /***
- *初始化话标题栏
- */
- voidInItTitle(){
- //获取窗口管理器显示自定义窗口,去掉默认显示对象。得到1/3屏幕宽度
- intwidth=getWindowManager().getDefaultDisplay().getWidth()/3;
- for(inti=0;i<array.length;i++){
- //声明一个radioButton对象
- RadioButtonradioButton=newRadioButton(this,null);
- radioButton.setText(array[i]);
- radioButton.setWidth(width);
- radioButton.setHeight(70);
- //集水平对齐文本和垂直重力的时候将会使用有额外的空间在TextView超出要求的文本本身
- radioButton.setGravity(Gravity.CENTER);
- //添加子视图。如果没有布局参数对孩子已经设置,默认参数对于这个ViewGroup上设置的孩子。
- radioGroup.addView(radioButton);
- }
- }
- /***
- *初始化文本
- */
- voidinitTextView(){
- //声明一个ArrayList对象
- textViews=newArrayList<TextView>();
- //获取窗口管理器显示自定义窗口,去掉默认显示对象。得到1/3屏幕宽度
- intwidth=getWindowManager().getDefaultDisplay().getWidth()/3;
- intheight=60;
- for(inti=0;i<array.length;i++){
- TextViewtextView=newTextView(this);
- textView.setText(array[i]);
- textView.setTextSize(17);
- textView.setWidth(width);
- textView.setHeight(height-30);
- textView.setGravity(Gravity.CENTER);
- textView.setId(i);
- //设置文本的监听事件
- textView.setOnClickListener(this);
- textViews.add(textView);
- LinearLayout.LayoutParamslayoutParams=newLayoutParams(
- LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
- layoutParams.width=1;
- layoutParams.height=height-40;
- layoutParams.gravity=Gravity.CENTER;
- //添加子视图。如果没有布局参数对孩子已经设置,默认参数对于这个ViewGroup上设置的孩子。
- linearLayout.addView(textView);
- }
- }
- /***
- *选中后的处理
- */
- publicvoidselect(intid){
- for(inti=0;i<array.length;i++){
- if(id==i){
- //得到图片的资源
- Bitmapbitmap=BitmapFactory.decodeResource(getResources(),
- R.drawable.itembg);
- //设置背景图
- textViews.get(id).setBackgroundDrawable(
- newBitmapDrawable(bitmap));
- viewPager.setCurrentItem(i);
- }
- else{
- textViews.get(i).setBackgroundDrawable(newBitmapDrawable());
- }
- }
- }
- @Override
- publicvoidonCreate(BundlesavedInstanceState){
- super.onCreate(savedInstanceState);
- //去除标题栏
- this.requestWindowFeature(Window.FEATURE_NO_TITLE);
- //取消状态栏,充满全屏
- this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
- WindowManager.LayoutParams.FLAG_FULLSCREEN);
- setContentView(R.layout.main);
- //实例化组件
- linearLayout=(LinearLayout)findViewById(R.id.linearlayout);
- viewPager=(ViewPager)findViewById(R.id.viewpaper);
- horizontalScrollView=(HorizontalScrollView)findViewById(R.id.horizontalscrollview);
- //调用方法实现
- initTextView();
- select(0);
- InItView();
- viewPager.setAdapter(newPagerAdapter(){
- //得到数目
- publicintgetCount(){
- returnpageViews.size();
- }
- @Override
- publicbooleanisViewFromObject(Viewview,Objectobject){
- returnview==object;
- }
- @Override
- publicintgetItemPosition(Objectobject){
- //TODOAuto-generatedmethodstub
- returnsuper.getItemPosition(object);
- }
- @Override
- publicvoiddestroyItem(Viewview,intid,Objectarg2){
- //TODOAuto-generatedmethodstub
- ((ViewPager)view).removeView(pageViews.get(id));
- }
- //获取每一个item的id
- @Override
- publicObjectinstantiateItem(Viewview,intid){
- ((ViewPager)view).addView(pageViews.get(id));
- returnpageViews.get(id);
- }
- });
- //页面改变时候的监听事件
- viewPager.setOnPageChangeListener(newOnPageChangeListener(){
- @Override
- publicvoidonPageSelected(intarg0){
- select(arg0);
- }
- @Override
- publicvoidonPageScrolled(intarg0,floatarg1,intarg2){
- }
- @Override
- publicvoidonPageScrollStateChanged(intarg0){
- }
- });
- }
- @Override
- publicvoidonClick(Viewv){
- select(v.getId());
- }
- }
8.接着看看QQonline.java 的实现
- packagecom.wang;
- importandroid.app.Activity;
- importandroid.os.Bundle;
- importandroid.view.ContextMenu;
- importandroid.view.View;
- importandroid.view.Window;
- importandroid.view.WindowManager;
- importandroid.view.ContextMenu.ContextMenuInfo;
- importandroid.widget.ExpandableListAdapter;
- importandroid.widget.ExpandableListView;
- importandroid.widget.Toast;
- importandroid.widget.ExpandableListView.OnChildClickListener;
- importandroid.widget.ExpandableListView.OnGroupClickListener;
- importandroid.widget.ExpandableListView.OnGroupCollapseListener;
- importandroid.widget.ExpandableListView.OnGroupExpandListener;
- publicclassQQonlineextendsActivity{
- //创建一个上下文菜单的方法
- publicvoidonCreateContextMenu(ContextMenumenu,Viewv,
- ContextMenuInfomenuInfo){
- super.onCreateContextMenu(menu,v,menuInfo);
- //一个垂直滚动的两级列表。取得菜单项
- ExpandableListView.ExpandableListContextMenuInfoinfo=(ExpandableListView.ExpandableListContextMenuInfo)menuInfo;
- //获得这个类型的位置
- inttype=ExpandableListView
- .getPackedPositionType(info.packedPosition);
- //取得所在组的索引
- intgroup=ExpandableListView
- .getPackedPositionGroup(info.packedPosition);
- //取得子菜单的索引
- intchild=ExpandableListView
- .getPackedPositionGroup(info.packedPosition);
- Toast.makeText(QQonline.this,
- "类型="+type+"分组:"+group+"子选项:"+child,
- Toast.LENGTH_LONG).show();
- }
- privateExpandableListVieweListView=null;
- privateExpandableListAdapteradapter=null;
- @Override
- publicvoidonCreate(BundlesavedInstanceState){
- //去除标题,
- this.requestWindowFeature(Window.FEATURE_NO_TITLE);
- //取消状态栏,充满全屏
- this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
- WindowManager.LayoutParams.FLAG_FULLSCREEN);
- super.onCreate(savedInstanceState);
- super.setContentView(R.layout.qqonline);
- //实例化组件
- this.eListView=(ExpandableListView)findViewById(R.id.elistview);
- //声明一个adapter对象
- adapter=newmyExpendableadapler(this);
- //设置适配器提供了数据
- this.eListView.setAdapter(this.adapter);
- // 注册一个上下文菜单显示给定的视图(多个视图可以显示上下文菜单)。
- super.registerForContextMenu(this.eListView);
- //设置点击时候触发的事件1,子选项点击事件2。父选项单击事件3.分组打开事件4.分组关闭事件
- this.eListView.setOnChildClickListener(newChildClickListener());
- this.eListView.setOnGroupClickListener(newGroupClickListener());
- this.eListView.setOnGroupExpandListener(newGroupExpandListener());
- this.eListView.setOnGroupCollapseListener(newGroupCollapseListener());
- }
- ///1,子选项点击事件
- privateclassChildClickListenerimplementsOnChildClickListener{
- publicbooleanonChildClick(ExpandableListViewparent,Viewv,
- intgroupPosition,intchildPosition,longid){
- Toast
- .makeText(
- QQonline.this,
- "子选项被选中,所的组:"+groupPosition+"子选项的位置:"
- +childPosition,Toast.LENGTH_LONG).show();
- returnfalse;
- }
- }
- //2。父选项单击事件
- privateclassGroupClickListenerimplementsOnGroupClickListener{
- publicbooleanonGroupClick(ExpandableListViewparent,Viewv,
- intgroupPosition,longid){
- Toast.makeText(QQonline.this,"分组选项被选中,所在组:"+groupPosition,
- Toast.LENGTH_LONG).show();
- returnfalse;
- }
- }
- //3.分组打开事件
- privateclassGroupExpandListenerimplementsOnGroupExpandListener{
- publicvoidonGroupExpand(intgroupPosition){
- //TODOAuto-generatedmethodstub
- Toast.makeText(QQonline.this,"打开分组,所在组:"+groupPosition,
- Toast.LENGTH_LONG).show();
- }
- }
- //4.分组关闭事件
- privateclassGroupCollapseListenerimplementsOnGroupCollapseListener{
- publicvoidonGroupCollapse(intgroupPosition){
- Toast.makeText(QQonline.this,"关闭分组,所在组:"+groupPosition,
- Toast.LENGTH_LONG).show();
- }
- }
- }
- packagecom.wang;
- importandroid.content.Context;
- importandroid.view.Gravity;
- importandroid.view.View;
- importandroid.view.ViewGroup;
- importandroid.widget.AbsListView;
- importandroid.widget.BaseExpandableListAdapter;
- importandroid.widget.TextView;
- publicclassmyExpendableadaplerextendsBaseExpandableListAdapter{
- //组名称
- privateString[]group=newString[]{"在线好友","高中同学","南阳理工同学","寝室哥们"};
- //子选项的名字
- privateString[][]child=newString[][]{
- {"李彦宏","马云","雷军","周鸿祎","唐骏","赵威威","李冕","马海刚","李斌","刘洪刚",
- "马玉龙","刘慧敏","王文龙"},
- {"赵威威","李冕","马海刚","李斌","刘洪刚","马玉龙","刘慧敏","王文龙"},
- {"张紫阳","王亚光","刘一鸣","崔芳芳","董卫杰","刘永乐"},
- {"武云册","王俊伟","王杰","付永振","杜新峰","应志超"}};
- privateContextcontext=null;
- //构造函数
- publicmyExpendableadapler(Contextcontext){
- this.context=context;
- }
- publicObjectgetChild(intgroupPosition,intchildPosition){
- returnthis.child[groupPosition][childPosition];
- }
- publiclonggetChildId(intgroupPosition,intchildPosition){
- returnchildPosition;
- }
- privateTextViewbuildTextView(){
- //LayoutParamsAbsListView扩展提供一个位置来保存视图类型。
- AbsListView.LayoutParamsparams=newAbsListView.LayoutParams(
- ViewGroup.LayoutParams.FILL_PARENT,40);
- TextViewtextView=newTextView(this.context);
- textView.setLayoutParams(params);
- //大小
- textView.setTextSize(15.0f);
- textView.setGravity(Gravity.LEFT+3);
- textView.setPadding(40,8,3,3);
- returntextView;
- }
- publicViewgetChildView(intgroupPosition,intchildPosition,
- booleanisLastChild,ViewconvertView,ViewGroupparent){
- TextViewtextView=newTextView(this.context);
- //得到每组的子选项并转换成字符串
- textView
- .setText(this.getChild(groupPosition,childPosition).toString());
- returntextView;
- }
- //统计子选项的个数
- publicintgetChildrenCount(intgroupPosition){
- //TODOAuto-generatedmethodstub
- returnthis.child[groupPosition].length;
- }
- //得到复选项的位置
- publicObjectgetGroup(intgroupPosition){
- //TODOAuto-generatedmethodstub
- returnthis.group[groupPosition];
- }
- //得到复选项的个数
- publicintgetGroupCount(){
- //TODOAuto-generatedmethodstub
- returnthis.group.length;
- }
- //得到复选项的id
- publiclonggetGroupId(intgroupPosition){
- //TODOAuto-generatedmethodstub
- returngroupPosition;
- }
- publicViewgetGroupView(intgroupPosition,booleanisExpanded,
- ViewconvertView,ViewGroupparent){
- //TODOAuto-generatedmethodstub
- TextViewtextView=this.buildTextView();
- textView.setText(this.getGroup(groupPosition).toString());
- returntextView;
- }
- //是否子选项和父选项id是稳定在改变底层数据。
- publicbooleanhasStableIds(){
- //TODOAuto-generatedmethodstub
- returntrue;
- }
- //p判断子选项是否可以选择
- publicbooleanisChildSelectable(intgroupPosition,intchildPosition){
- //TODOAuto-generatedmethodstub
- returntrue;
- }
- }
10.有两个界面还没有添加功能pullrefreshtest.java
- packagecom.wang;
- importjava.util.LinkedList;
- importcom.wang.pullrefresh.MyListView;
- importcom.wang.pullrefresh.MyListView.OnRefreshListener;
- importandroid.app.Activity;
- importandroid.os.AsyncTask;
- importandroid.os.Bundle;
- importandroid.view.LayoutInflater;
- importandroid.view.View;
- importandroid.view.ViewGroup;
- importandroid.view.Window;
- importandroid.view.WindowManager;
- importandroid.widget.BaseAdapter;
- importandroid.widget.TextView;
- publicclasspullrefreshtestextendsActivity{
- privateLinkedList<String>data;
- privateBaseAdapteradapter;
- publicvoidonCreate(BundlesavedInstanceState){
- //去除标题栏
- requestWindowFeature(Window.FEATURE_NO_TITLE);
- //设置全屏,取消状态栏
- this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
- WindowManager.LayoutParams.FLAG_FULLSCREEN);
- super.onCreate(savedInstanceState);
- setContentView(R.layout.pullrefresh);
- data=newLinkedList<String>();
- for(inti=40;i<50;i++){
- //输出list——item上的数据
- data.add(String.valueOf("暑假第"+i+"天,在南阳理工,想家ing..."));
- }
- finalMyListViewlistView=(MyListView)findViewById(R.id.listView);
- adapter=newBaseAdapter(){
- //得到一个视图,显示在指定位置上的数据在数据集,可以创建一个视图从XML布局文件
- publicViewgetView(intposition,ViewconvertView,ViewGroupparent){
- //上下文全局应用程序对象
- convertView=LayoutInflater.from(getApplicationContext())
- .inflate(R.layout.list_item,null);
- //实例化组件
- TextViewtextView=(TextView)convertView
- .findViewById(R.id.textView_item);
- //设置文本本内容
- textView.setText(data.get(position));
- returnconvertView;
- }
- //得到行相关联id列表中指定的位置。
- publiclonggetItemId(intposition){
- returnposition;
- }
- //获得相关的数据项中的指定位置的数据集
- publicObjectgetItem(intposition){
- returndata.get(position);
- }
- //获得项目在数据集适配器的个数。
- publicintgetCount(){
- returndata.size();
- }
- };
- listView.setAdapter(adapter);
- listView.setonRefreshListener(newOnRefreshListener(){
- publicvoidonRefresh(){
- newAsyncTask<Void,Void,Void>(){
- //...b表示多个参数
- protectedVoiddoInBackground(Void...params){
- try{
- //
- Thread.sleep(1000);
- }catch(Exceptione){
- e.printStackTrace();
- }
- //增加一条数据到list中
- data.addFirst("刷新后内容:每天都是新的一天!!!,親!要努力奋斗哦!!!");
- returnnull;
- }
- protectedvoidonPostExecute(Voidresult){
- adapter.notifyDataSetChanged();
- listView.onRefreshComplete();
- }
- }.execute(null);
- }
- });
- }
- }
11.接着是下拉列表更新的实现过程MyListView.java
- packagecom.wang.pullrefresh;
- importjava.text.SimpleDateFormat;
- importjava.util.Date;
- importcom.wang.R;
- importandroid.content.Context;
- importandroid.util.AttributeSet;
- importandroid.util.Log;
- importandroid.view.LayoutInflater;
- importandroid.view.MotionEvent;
- importandroid.view.View;
- importandroid.view.ViewGroup;
- importandroid.view.View.MeasureSpec;
- importandroid.view.animation.LinearInterpolator;
- importandroid.view.animation.RotateAnimation;
- importandroid.widget.AbsListView;
- importandroid.widget.BaseAdapter;
- importandroid.widget.ImageView;
- importandroid.widget.LinearLayout;
- importandroid.widget.ListView;
- importandroid.widget.ProgressBar;
- importandroid.widget.TextView;
- importandroid.widget.AbsListView.OnScrollListener;
- publicclassMyListViewextendsListViewimplementsOnScrollListener{
- privatestaticfinalStringTAG="listview";
- privatefinalstaticintRELEASE_To_REFRESH=0;
- privatefinalstaticintPULL_To_REFRESH=1;
- privatefinalstaticintREFRESHING=2;
- privatefinalstaticintDONE=3;
- privatefinalstaticintLOADING=4;
- //实际的padding的距离与界面上偏移距离的比例
- privatefinalstaticintRATIO=3;
- privateLayoutInflaterinflater;
- privateLinearLayoutheadView;
- privateTextViewtipsTextview;
- privateTextViewlastUpdatedTextView;
- privateImageViewarrowImageView;
- privateProgressBarprogressBar;
- privateRotateAnimationanimation;
- privateRotateAnimationreverseAnimation;
- //用于保证startY的值在一个完整的touch事件中只被记录一次
- privatebooleanisRecored;
- privateintheadContentWidth;
- privateintheadContentHeight;
- privateintstartY;
- privateintfirstItemIndex;
- privateintstate;
- privatebooleanisBack;
- privateOnRefreshListenerrefreshListener;
- privatebooleanisRefreshable;
- publicMyListView(Contextcontext){
- super(context);
- //调用下面初始化的函数
- init(context);
- }
- publicMyListView(Contextcontext,AttributeSetattrs){
- super(context,attrs);
- //调用下面初始化的函数
- init(context);
- }
- privatevoidinit(Contextcontext){
- //获得LayoutInflater从给定的上下文。
- inflater=LayoutInflater.from(context);
- //实例化布局XML文件转换成相应的视图对象。
- headView=(LinearLayout)inflater.inflate(R.layout.refresh,null);
- arrowImageView=(ImageView)headView
- .findViewById(R.id.head_arrowImageView);
- //设置最小宽度和高度
- arrowImageView.setMinimumWidth(70);
- arrowImageView.setMinimumHeight(50);
- //实例化布局XML文件转换成相应的视图对象。
- progressBar=(ProgressBar)headView
- .findViewById(R.id.head_progressBar);
- tipsTextview=(TextView)headView.findViewById(R.id.head_tipsTextView);
- lastUpdatedTextView=(TextView)headView
- .findViewById(R.id.head_lastUpdatedTextView);
- //调用下拉刷新的方法
- measureView(headView);
- //d得到原始高度和宽度
- headContentHeight=headView.getMeasuredHeight();
- headContentWidth=headView.getMeasuredWidth();
- //设置填充。视图可能添加的空间要求显示滚动条,这取决于风格和知名度的滚动条
- headView.setPadding(0,-1*headContentHeight,0,0);
- headView.invalidate();
- //标签用来识别一个日志消息的来源。标识类或活动日志调用发生
- Log.v("size","width:"+headContentWidth+"height:"
- +headContentHeight);
- //添加一个固定视图出现在列表的顶部
- addHeaderView(headView,null,false);
- //设置监听事件
- setOnScrollListener(this);
- //动画效果实现下拉和松开时候图片的180度旋转注意0,-180,和他是有区别的-180,0,
- animation=newRotateAnimation(0,-180,
- RotateAnimation.RELATIVE_TO_SELF,0.5f,
- RotateAnimation.RELATIVE_TO_SELF,0.5f);
- //设置加速度曲线为这个动画。默认值为一个线性插值。
- animation.setInterpolator(newLinearInterpolator());
- animation.setDuration(300);
- //如果fillAfter是真的,转换,该动画执行完成时将会持续下去
- animation.setFillAfter(true);
- reverseAnimation=newRotateAnimation(-180,0,
- RotateAnimation.RELATIVE_TO_SELF,0.5f,
- RotateAnimation.RELATIVE_TO_SELF,0.5f);
- //设置加速度曲线为这个动画。默认值为一个线性插值。
- reverseAnimation.setInterpolator(newLinearInterpolator());
- reverseAnimation.setDuration(300);
- //如果fillAfter是真的,转换,该动画执行完成时将会持续下去
- reverseAnimation.setFillAfter(true);
- //设置状态
- state=DONE;
- //设置不可刷新状态
- isRefreshable=false;
- }
- //回调方法时要调用的列表或网格已经滚动。这将完成之后调用的滚动方法
- publicvoidonScroll(AbsListViewarg0,intfirstVisiableItem,intarg2,
- intarg3){
- firstItemIndex=firstVisiableItem;
- }
- /*
- *回调方法调用而列表视图或网格视图被滚动。如果这个视图被滚动,将调用此方法在接下来的一局画卷的呈现*
- */
- publicvoidonScrollStateChanged(AbsListViewarg0,intarg1){
- }
- //触摸事件监听
- publicbooleanonTouchEvent(MotionEventevent){
- //判断是否可以刷新
- if(isRefreshable){
- //根据动作相应不同的方法
- switch(event.getAction()){
- //当按住屏幕向下拉屏幕的时候
- caseMotionEvent.ACTION_DOWN:
- if(firstItemIndex==0&&!isRecored){
- isRecored=true;
- startY=(int)event.getY();
- Log.v(TAG,"在下拉的时候记录当前位置‘");
- }
- break;
- //当按住屏幕向上松屏幕的时候
- caseMotionEvent.ACTION_UP:
- if(state!=REFRESHING&&state!=LOADING){
- if(state==DONE){
- }
- if(state==PULL_To_REFRESH){
- state=DONE;
- changeHeaderViewByState();
- Log.v(TAG,"由下拉刷新状态,到done状态");
- }
- if(state==RELEASE_To_REFRESH){
- state=REFRESHING;
- changeHeaderViewByState();
- onRefresh();
- Log.v(TAG,"由松开刷新状态,到done状态");
- }
- }
- isRecored=false;
- isBack=false;
- break;
- //当按住屏幕移动时候
- caseMotionEvent.ACTION_MOVE:
- inttempY=(int)event.getY();
- if(!isRecored&&firstItemIndex==0){
- Log.v(TAG,"在move时候记录下位置");
- isRecored=true;
- startY=tempY;
- }
- if(state!=REFRESHING&&isRecored&&state!=LOADING){
- /***
- *,当前的位置一直是在head,否则如果当列表超出屏幕的话,当在上推的时候,列表会同时进行滚动
- */
- //可以松手去刷新了
- if(state==RELEASE_To_REFRESH){
- setSelection(0);
- //往上推了,推到了屏幕足够掩盖head的程度,但是还没有推到全部掩盖的地步
- if(((tempY-startY)/RATIO<headContentHeight)
- &&(tempY-startY)>0){
- state=PULL_To_REFRESH;
- changeHeaderViewByState();
- Log.v(TAG,"由松开刷新状态转变到下拉刷新状态");
- }
- //一下子推到顶了
- elseif(tempY-startY<=0){
- state=DONE;
- //调用改变时候的方法,更新UI
- changeHeaderViewByState();
- Log.v(TAG,"由松开刷新状态转变到done状态");
- }else{
- }
- }
- //还没有到达显示松开刷新的时候
- if(state==PULL_To_REFRESH){
- setSelection(0);
- //下拉到可以进入RELEASE_TO_REFRESH的状态
- if((tempY-startY)/RATIO>=headContentHeight){
- state=RELEASE_To_REFRESH;
- isBack=true;
- //调用改变时候的方法,更新UI
- changeHeaderViewByState();
- Log.v(TAG,"由done或者下拉刷新状态转变到松开刷新");
- }
- //上推到顶了
- elseif(tempY-startY<=0){
- state=DONE;
- //调用改变时候的方法,更新UI
- changeHeaderViewByState();
- Log.v(TAG,"由DOne或者下拉刷新状态转变到done状态");
- }
- }
- //done状态下
- if(state==DONE){
- if(tempY-startY>0){
- state=PULL_To_REFRESH;
- //调用改变时候的方法,更新UI
- changeHeaderViewByState();
- }
- }
- //更新headView的size
- if(state==PULL_To_REFRESH){
- headView.setPadding(0,-1*headContentHeight
- +(tempY-startY)/RATIO,0,0);
- }
- //更新headView的paddingTop
- if(state==RELEASE_To_REFRESH){
- headView.setPadding(0,(tempY-startY)/RATIO
- -headContentHeight,0,0);
- }
- }
- break;
- }
- }
- returnsuper.onTouchEvent(event);
- }
- //当状态改变时候,调用该方法,以更新界面
- privatevoidchangeHeaderViewByState(){
- //根据当前的状态进行判断
- switch(state){
- //下拉时候,松开既可刷新
- caseRELEASE_To_REFRESH:
- //设置视图VISIBLE可见,GONE不可见
- arrowImageView.setVisibility(View.VISIBLE);
- progressBar.setVisibility(View.GONE);
- tipsTextview.setVisibility(View.VISIBLE);
- lastUpdatedTextView.setVisibility(View.VISIBLE);
- //现在开始指定的动画。
- arrowImageView.clearAnimation();
- arrowImageView.startAnimation(animation);
- tipsTextview.setText("松开既可刷新");
- Log.v(TAG,"当前状态,松开即可刷新");
- break;
- //开始时候,下拉刷新
- casePULL_To_REFRESH:
- //设置视图VISIBLE可见,GONE不可见
- progressBar.setVisibility(View.GONE);
- tipsTextview.setVisibility(View.VISIBLE);
- lastUpdatedTextView.setVisibility(View.VISIBLE);
- //现在开始指定的动画。
- arrowImageView.clearAnimation();
- arrowImageView.setVisibility(View.VISIBLE);
- if(isBack){
- isBack=false;
- //现在开始指定的动画。
- arrowImageView.clearAnimation();
- arrowImageView.startAnimation(reverseAnimation);
- tipsTextview.setText("下拉刷新");
- }else{
- tipsTextview.setText("下拉刷新");
- }
- Log.v(TAG,"当前状态,下拉刷新");
- break;
- caseREFRESHING:
- headView.setPadding(0,0,0,0);
- //设置视图VISIBLE可见,GONE不可见
- progressBar.setVisibility(View.VISIBLE);
- //现在开始指定的动画。
- arrowImageView.clearAnimation();
- arrowImageView.setVisibility(View.GONE);
- tipsTextview.setText("正在刷新...");
- lastUpdatedTextView.setVisibility(View.VISIBLE);
- Log.v(TAG,"当前状态,正在刷新...");
- break;
- caseDONE:
- //设置填充。视图可能添加的空间要求显示滚动条
- headView.setPadding(0,-1*headContentHeight,0,0);
- //设置视图VISIBLE可见,GONE不可见
- progressBar.setVisibility(View.GONE);
- //现在开始指定的动画。
- arrowImageView.clearAnimation();
- arrowImageView.setImageResource(R.drawable.down);
- tipsTextview.setText("下拉刷新");
- lastUpdatedTextView.setVisibility(View.VISIBLE);
- Log.v(TAG,"当前状态");
- break;
- }
- }
- publicvoidsetonRefreshListener(OnRefreshListenerrefreshListener){
- this.refreshListener=refreshListener;
- isRefreshable=true;
- }
- publicinterfaceOnRefreshListener{
- publicvoidonRefresh();
- }
- //设置更新时间
- publicvoidonRefreshComplete(){
- state=DONE;
- //
- SimpleDateFormatformat=newSimpleDateFormat("yyyy年MM月dd日HH:mm");
- Stringdate=format.format(newDate());
- lastUpdatedTextView.setText("最近更新:"+date);
- changeHeaderViewByState();
- }
- privatevoidonRefresh(){
- if(refreshListener!=null){
- refreshListener.onRefresh();
- }
- }
- //下拉刷新的
- privatevoidmeasureView(Viewchild){
- //v这组布局参数宽度和高度
- ViewGroup.LayoutParamsp=child.getLayoutParams();
- if(p==null){
- //创建一个新组布局参数指定的宽度(填充)和高度(包裹)。
- p=newViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,
- ViewGroup.LayoutParams.WRAP_CONTENT);
- }
- //d得到childWidthSpec(高度或宽度)的子视图
- intchildWidthSpec=ViewGroup.getChildMeasureSpec(0,0+0,p.width);
- intlpHeight=p.height;
- intchildHeightSpec;
- if(lpHeight>0){
- //创建一个测量规范基于所提供的大小和模式
- childHeightSpec=MeasureSpec.makeMeasureSpec(lpHeight,
- MeasureSpec.EXACTLY);
- }else{
- childHeightSpec=MeasureSpec.makeMeasureSpec(0,
- MeasureSpec.UNSPECIFIED);
- }
- //找出一个视图应该多大。父供应约束信息在宽度和高度参数
- child.measure(childWidthSpec,childHeightSpec);
- }
- publicvoidsetAdapter(BaseAdapteradapter){
- //设置最近刷新的时间
- SimpleDateFormatformat=newSimpleDateFormat("yyyy年MM月dd日HH:mm");
- Stringdate=format.format(newDate());
- lastUpdatedTextView.setText("最近更新:"+date);
- super.setAdapter(adapter);
- }
- }
12.接着是没有添加聊天功能的main3.java
- packagecom.wang;
- importandroid.app.Activity;
- importandroid.os.Bundle;
- importandroid.widget.ImageView;
- publicclassmain3extendsActivity{
- protectedvoidonCreate(BundlesavedInstanceState){
- //TODOAuto-generatedmethodstub
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main3);
- }
- }
- <activityandroid:name=".pullrefreshtest"></activity>
- <activityandroid:name=".QQonline"></activity>
- <activityandroid:name=".main3"></activity>
14.最后,还有一个重要的问题,本程序需要第三方jar包的支持,所以呢还需要导入第三方android-support-v4.jar包, 不会的参考 http://www.linuxidc.com/Linux/2012-08/67213.htm
下载地址
免费下载地址在 http://linux.linuxidc.com/
用户名与密码都是www.linuxidc.com
具体下载目录在 /2012年资料/8月/3日/Android模仿QQ的左右滑动切换界面和下拉更新的效果/android-support-v4.jar包
15,这样过后就可以看到运行效果咯: 第一张是下拉刷新时候的界面,第二张是松开即可刷新时候的图片,第三张是刷新后的内容,第四张的QQ联系人的界面,第五张是还没有完善聊天消息的界面,第六张是左右滑动切换界面的实现效果
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