可动态布局的Android抽屉之基础
http://blog.csdn.net/hellogv/article/details/6789698
http://blog.csdn.net/hellogv/article/details/6789698
http://blog.csdn.net/hellogv/article/details/6789698http://blog.csdn.net/hellogv/article/details/6789698
http://blog.csdn.net/hellogv/article/details/6789698
http://blog.csdn.net/hellogv/article/details/6789698
可动态布局的Android抽屉之基础
分类:Android番外 2011-09-19 14:07 35650人阅读 评论(40) 收藏 举报 android layout integer object encoding interface本文来自http://blog.csdn.net/hellogv/,欢迎转摘,引用必须注明出处!
以前曾经介绍过《Android提高第十九篇之"多方向"抽屉》,当这个抽屉组件不与周围组件发生压挤的情况下(周围组件布局不变),是比较好使的,但是如果需要对周围组件挤压,则用起来欠缺美观了。
如下图。在对周围压挤的情况下,抽屉是先把周围的组件一次性压挤,再通过动画效果展开/收缩的,这种做法的好处是快速简单,坏处是如果挤压范围过大,则效果生硬。
本文实现的自定义抽屉组件,主要针对这种压挤效果做出改良,渐进式压挤周围组件,使得过渡效果更加美观。如下图。
本文实现的抽屉原理是酱紫:
1.抽屉组件主要在屏幕不可视区域,手柄在屏幕边缘的可视区域。即 抽屉.rightMargin=-XXX + 手柄.width
2.指定一个周围组件为可压挤,即LayoutParams.weight=1;当然用户也可以指定多个View.
3.使用AsyncTask来实现弹出/收缩的动画,弹出:抽屉.rightMargin+=XX,收缩:抽屉.rightMargin-=XX
总结,本文的自定义抽屉虽然对压挤周围组件有过渡效果,但是比较耗资源,读者可以针对不同的情况考虑使用。
本文的源码可以到http://download.csdn.net/detail/hellogv/3615686下载。
接下来贴出本文全部源代码:
main.xml的源码:
[html] view plain copy print ?- <spanstyle="font-family:ComicSansMS;font-size:18px;"><?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:id="@+id/container">
- <GridViewandroid:id="@+id/gridview"android:layout_width="fill_parent"
- android:layout_height="fill_parent"android:numColumns="auto_fit"
- android:verticalSpacing="10dp"android:gravity="center"
- android:columnWidth="50dip"android:horizontalSpacing="10dip"/>
- </LinearLayout></span>
GridView的Item.xml的源码:
[html] view plain copy print ?- <spanstyle="font-family:ComicSansMS;font-size:18px;"><?xmlversion="1.0"encoding="utf-8"?>
- <RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_height="wrap_content"android:paddingBottom="4dip"
- android:layout_width="fill_parent">
- <ImageViewandroid:layout_height="wrap_content"android:id="@+id/ItemImage"
- android:layout_width="wrap_content"android:layout_centerHorizontal="true">
- </ImageView>
- <TextViewandroid:layout_width="wrap_content"
- android:layout_below="@+id/ItemImage"android:layout_height="wrap_content"
- android:text="TextView01"android:layout_centerHorizontal="true"
- android:id="@+id/ItemText">
- </TextView>
- </RelativeLayout></span>
Panel.java是本文核心,抽屉组件的源码,这个抽屉只实现了从右往左的弹出/从左往右的收缩,读者可以根据自己的需要修改源码来改变抽屉动作的方向:
[java] view plain copy print ?- <spanstyle="font-family:ComicSansMS;font-size:18px;">publicclassPanelextendsLinearLayout{
- publicinterfacePanelClosedEvent{
- voidonPanelClosed(Viewpanel);
- }
- publicinterfacePanelOpenedEvent{
- voidonPanelOpened(Viewpanel);
- }
- /**Handle的宽度,与Panel等高*/
- privatefinalstaticintHANDLE_WIDTH=30;
- /**每次自动展开/收缩的范围*/
- privatefinalstaticintMOVE_WIDTH=20;
- privateButtonbtnHandle;
- privateLinearLayoutpanelContainer;
- privateintmRightMargin=0;
- privateContextmContext;
- privatePanelClosedEventpanelClosedEvent=null;
- privatePanelOpenedEventpanelOpenedEvent=null;
- /**
- *otherView自动布局以适应Panel展开/收缩的空间变化
- *@authorGV
- *
- */
- publicPanel(Contextcontext,ViewotherView,intwidth,intheight){
- super(context);
- this.mContext=context;
- //改变Panel附近组件的属性
- LayoutParamsotherLP=(LayoutParams)otherView.getLayoutParams();
- otherLP.weight=1;//支持压挤
- otherView.setLayoutParams(otherLP);
- //设置Panel本身的属性
- LayoutParamslp=newLayoutParams(width,height);
- lp.rightMargin=-lp.width+HANDLE_WIDTH;//Panel的Container在屏幕不可视区域,Handle在可视区域
- mRightMargin=Math.abs(lp.rightMargin);
- this.setLayoutParams(lp);
- this.setOrientation(LinearLayout.HORIZONTAL);
- //设置Handle的属性
- btnHandle=newButton(context);
- btnHandle.setLayoutParams(newLayoutParams(HANDLE_WIDTH,height));
- btnHandle.setOnClickListener(newOnClickListener(){
- @Override
- publicvoidonClick(Viewarg0){
- LayoutParamslp=(LayoutParams)Panel.this.getLayoutParams();
- if(lp.rightMargin<0)//CLOSE的状态
- newAsynMove().execute(newInteger[]{MOVE_WIDTH});//正数展开
- elseif(lp.rightMargin>=0)//OPEN的状态
- newAsynMove().execute(newInteger[]{-MOVE_WIDTH});//负数收缩
- }
- });
- //btnHandle.setOnTouchListener(HandleTouchEvent);
- this.addView(btnHandle);
- //设置Container的属性
- panelContainer=newLinearLayout(context);
- panelContainer.setLayoutParams(newLayoutParams(LayoutParams.FILL_PARENT,
- LayoutParams.FILL_PARENT));
- this.addView(panelContainer);
- }
- /**
- *定义收缩时的回调函数
- *@paramevent
- */
- publicvoidsetPanelClosedEvent(PanelClosedEventevent)
- {
- this.panelClosedEvent=event;
- }
- /**
- *定义展开时的回调函数
- *@paramevent
- */
- publicvoidsetPanelOpenedEvent(PanelOpenedEventevent)
- {
- this.panelOpenedEvent=event;
- }
- /**
- *把View放在Panel的Container
- *@paramv
- */
- publicvoidfillPanelContainer(Viewv)
- {
- panelContainer.addView(v);
- }
- /**
- *异步移动Panel
- *@authorhellogv
- */
- classAsynMoveextendsAsyncTask<Integer,Integer,Void>{
- @Override
- protectedVoiddoInBackground(Integer...params){
- inttimes;
- if(mRightMargin%Math.abs(params[0])==0)//整除
- times=mRightMargin/Math.abs(params[0]);
- else
- //有余数
- times=mRightMargin/Math.abs(params[0])+1;
- for(inti=0;i<times;i++){
- publishProgress(params);
- try{
- Thread.sleep(Math.abs(params[0]));
- }catch(InterruptedExceptione){
- //TODOAuto-generatedcatchblock
- e.printStackTrace();
- }
- }
- returnnull;
- }
- @Override
- protectedvoidonProgressUpdate(Integer...params){
- LayoutParamslp=(LayoutParams)Panel.this.getLayoutParams();
- if(params[0]<0)
- lp.rightMargin=Math.max(lp.rightMargin+params[0],
- (-mRightMargin));
- else
- lp.rightMargin=Math.min(lp.rightMargin+params[0],0);
- if(lp.rightMargin==0&&panelOpenedEvent!=null){//展开之后
- panelOpenedEvent.onPanelOpened(Panel.this);//调用OPEN回调函数
- }
- elseif(lp.rightMargin==-(mRightMargin)&&panelClosedEvent!=null){//收缩之后
- panelClosedEvent.onPanelClosed(Panel.this);//调用CLOSE回调函数
- }
- Panel.this.setLayoutParams(lp);
- }
- }
- }
- </span>
main.java是主控部分,演示了Panel的使用:
[java] view plain copy print ?- <spanstyle="font-family:ComicSansMS;font-size:18px;">publicclassmainextendsActivity{
- publicPanelpanel;
- publicLinearLayoutcontainer;
- publicGridViewgridview;
- publicvoidonCreate(BundlesavedInstanceState){
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- this.setTitle("“可动态布局”的抽屉组件之构建基础-----hellogv");
- gridview=(GridView)findViewById(R.id.gridview);
- container=(LinearLayout)findViewById(R.id.container);
- panel=newPanel(this,gridview,200,LayoutParams.FILL_PARENT);
- container.addView(panel);//加入Panel控件
- //新建测试组件
- TextViewtvTest=newTextView(this);
- tvTest.setLayoutParams(newLayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));
- tvTest.setText("测试组件,红字白底");
- tvTest.setTextColor(Color.RED);
- tvTest.setBackgroundColor(Color.WHITE);
- //加入到Panel里面
- panel.fillPanelContainer(tvTest);
- panel.setPanelClosedEvent(panelClosedEvent);
- panel.setPanelOpenedEvent(panelOpenedEvent);
- //往GridView填充测试数据
- ArrayList<HashMap<String,Object>>lstImageItem=newArrayList<HashMap<String,Object>>();
- for(inti=0;i<100;i++){
- HashMap<String,Object>map=newHashMap<String,Object>();
- map.put("ItemImage",R.drawable.icon);
- map.put("ItemText","NO."+String.valueOf(i));
- lstImageItem.add(map);
- }
- SimpleAdaptersaImageItems=newSimpleAdapter(this,
- lstImageItem,
- R.layout.item,
- newString[]{"ItemImage","ItemText"},
- newint[]{R.id.ItemImage,R.id.ItemText});
- gridview.setAdapter(saImageItems);
- gridview.setOnItemClickListener(newItemClickListener());
- }
- PanelClosedEventpanelClosedEvent=newPanelClosedEvent(){
- @Override
- publicvoidonPanelClosed(Viewpanel){
- Log.e("panelClosedEvent","panelClosedEvent");
- }
- };
- PanelOpenedEventpanelOpenedEvent=newPanelOpenedEvent(){
- @Override
- publicvoidonPanelOpened(Viewpanel){
- Log.e("panelOpenedEvent","panelOpenedEvent");
- }
- };
- classItemClickListenerimplementsOnItemClickListener{
- @Override
- publicvoidonItemClick(AdapterView<?>arg0,Viewarg1,intarg2,longarg3){
- @SuppressWarnings("unchecked")
- HashMap<String,Object>item=(HashMap<String,Object>)arg0
- .getItemAtPosition(arg2);
- setTitle((String)item.get("ItemText"));
- }
- }</span>
后面还会继续介绍如何在Panel加入拖拉效果的处理!
http://blog.csdn.net/hellogv/article/details/6264706
http://blog.csdn.net/hellogv/article/details/6264706
http://blog.csdn.net/hellogv/article/details/6264706
Android提高第十九篇之"多方向"抽屉
分类:Android提高 2011-03-21 13:47 42640人阅读 评论(135) 收藏 举报 android action up google float 扩展本文来自http://blog.csdn.net/hellogv/,引用必须注明出处!
在android上要实现类似Launch的抽屉效果,大家一定首先会想起SlidingDrawer。SlidingDrawer是android官方控件之一,本文的主角不是它,而是民间的控件工具集合~~~android-misc-widgets。android-misc-widgets里面包含几个widget:Panel、SmoothButton、Switcher、VirtualKeyboard,还有一些动画特效,本文主要介绍抽屉容器Panel的用法。android-misc-widgets的google工程地址:-widgets/http://code.google.com/p/android-misc,工程代码中Panel的演示效果如下:
这个Panel控件可以轻易实现不同方向的抽屉效果,比SlidingDrawer有更强的扩展性!
在多次使用Panel的过程中,发现Panel有个bug,会间断性出现“闪烁”,也就是在onTouchListener里面的触发ACTION_DOWN后,抽屉瞬间弹出然后瞬间回收(版本日期为Feb 3, 2009)。把原Panel的OnTouchListener,即以下代码:
[java] view plain copy
- OnTouchListenertouchListener=newOnTouchListener(){
- intinitX;
- intinitY;
- booleansetInitialPosition;
- publicbooleanonTouch(Viewv,MotionEventevent){
- if(mState==State.ANIMATING){
- //weareanimating
- returnfalse;
- }
- /Log.d(TAG,"state:"+mState+"x:"+event.getX()+"y:"+event.getY());
- intaction=event.getAction();
- if(action==MotionEvent.ACTION_DOWN){
- if(mBringToFront){
- bringToFront();
- }
- initX=0;
- initY=0;
- if(mContent.getVisibility()==GONE){
- //sincewemaynotknowcontentdimensionsweusefactorshere
- if(mOrientation==VERTICAL){
- initY=mPosition==TOP?-1:1;
- }else{
- initX=mPosition==LEFT?-1:1;
- }
- }
- setInitialPosition=true;
- }else{
- if(setInitialPosition){
- //nowweknowcontentdimensions,sowemultiplyfactors...
- initX*=mContentWidth;
- initY*=mContentHeight;
- //...andsetinitialpanel'sposition
- mGestureListener.setScroll(initX,initY);
- setInitialPosition=false;
- //foroffsetLocationwehavetoinvertvalues
- initX=-initX;
- initY=-initY;
- }
- //offseteveryACTION_MOVE&ACTION_UPevent
- event.offsetLocation(initX,initY);
- }
- if(!mGestureDetector.onTouchEvent(event)){
- if(action==MotionEvent.ACTION_UP){
- //tupupafterscrolling
- post(startAnimation);
- }
- }
- returnfalse;
- }
- };
替换为:
[java] view plain copy
- OnTouchListenertouchListener=newOnTouchListener(){
- floattouchX,touchY;
- publicbooleanonTouch(Viewv,MotionEventevent){
- if(mState==State.ANIMATING){
- //weareanimating
- returnfalse;
- }
- intaction=event.getAction();
- if(action==MotionEvent.ACTION_DOWN){
- if(mBringToFront){
- bringToFront();
- }
- touchX=event.getX();
- touchY=event.getY();
- }
- if(!mGestureDetector.onTouchEvent(event)){
- if(action==MotionEvent.ACTION_UP){
- //tupupafterscrolling
- intsize=(int)(Math.abs(touchX-event.getX())+Math
- .abs(touchY-event.getY()));
- if(size==mContentWidth||size==mContentHeight){
- mState=State.ABOUT_TO_ANIMATE;
- //Log.e("size",String.valueOf(size));
- //Log.e(String.valueOf(mContentWidth),String.valueOf(mContentHeight));
- }
- post(startAnimation);
- }
- }
- returnfalse;
- }
- };
即可修复这个bug,并且也同样实现了OnClickListener的功能,可以把原Panel的OnClickListener给删掉了!
http://blog.csdn.net/hellogv/article/details/6264706
http://blog.csdn.net/hellogv/article/details/6264706
http://blog.csdn.net/hellogv/article/details/6264706
Android提高第十九篇之"多方向"抽屉
分类:Android提高 2011-03-21 13:47 42640人阅读 评论(135) 收藏 举报 android action up google float 扩展本文来自http://blog.csdn.net/hellogv/,引用必须注明出处!
在android上要实现类似Launch的抽屉效果,大家一定首先会想起SlidingDrawer。SlidingDrawer是android官方控件之一,本文的主角不是它,而是民间的控件工具集合~~~android-misc-widgets。android-misc-widgets里面包含几个widget:Panel、SmoothButton、Switcher、VirtualKeyboard,还有一些动画特效,本文主要介绍抽屉容器Panel的用法。android-misc-widgets的google工程地址:-widgets/http://code.google.com/p/android-misc,工程代码中Panel的演示效果如下:
这个Panel控件可以轻易实现不同方向的抽屉效果,比SlidingDrawer有更强的扩展性!
在多次使用Panel的过程中,发现Panel有个bug,会间断性出现“闪烁”,也就是在onTouchListener里面的触发ACTION_DOWN后,抽屉瞬间弹出然后瞬间回收(版本日期为Feb 3, 2009)。把原Panel的OnTouchListener,即以下代码:
[java] view plain copy
- OnTouchListenertouchListener=newOnTouchListener(){
- intinitX;
- intinitY;
- booleansetInitialPosition;
- publicbooleanonTouch(Viewv,MotionEventevent){
- if(mState==State.ANIMATING){
- //weareanimating
- returnfalse;
- }
- /Log.d(TAG,"state:"+mState+"x:"+event.getX()+"y:"+event.getY());
- intaction=event.getAction();
- if(action==MotionEvent.ACTION_DOWN){
- if(mBringToFront){
- bringToFront();
- }
- initX=0;
- initY=0;
- if(mContent.getVisibility()==GONE){
- //sincewemaynotknowcontentdimensionsweusefactorshere
- if(mOrientation==VERTICAL){
- initY=mPosition==TOP?-1:1;
- }else{
- initX=mPosition==LEFT?-1:1;
- }
- }
- setInitialPosition=true;
- }else{
- if(setInitialPosition){
- //nowweknowcontentdimensions,sowemultiplyfactors...
- initX*=mContentWidth;
- initY*=mContentHeight;
- //...andsetinitialpanel'sposition
- mGestureListener.setScroll(initX,initY);
- setInitialPosition=false;
- //foroffsetLocationwehavetoinvertvalues
- initX=-initX;
- initY=-initY;
- }
- //offseteveryACTION_MOVE&ACTION_UPevent
- event.offsetLocation(initX,initY);
- }
- if(!mGestureDetector.onTouchEvent(event)){
- if(action==MotionEvent.ACTION_UP){
- //tupupafterscrolling
- post(startAnimation);
- }
- }
- returnfalse;
- }
- };
替换为:
[java] view plain copy
- OnTouchListenertouchListener=newOnTouchListener(){
- floattouchX,touchY;
- publicbooleanonTouch(Viewv,MotionEventevent){
- if(mState==State.ANIMATING){
- //weareanimating
- returnfalse;
- }
- intaction=event.getAction();
- if(action==MotionEvent.ACTION_DOWN){
- if(mBringToFront){
- bringToFront();
- }
- touchX=event.getX();
- touchY=event.getY();
- }
- if(!mGestureDetector.onTouchEvent(event)){
- if(action==MotionEvent.ACTION_UP){
- //tupupafterscrolling
- intsize=(int)(Math.abs(touchX-event.getX())+Math
- .abs(touchY-event.getY()));
- if(size==mContentWidth||size==mContentHeight){
- mState=State.ABOUT_TO_ANIMATE;
- //Log.e("size",String.valueOf(size));
- //Log.e(String.valueOf(mContentWidth),String.valueOf(mContentHeight));
- }
- post(startAnimation);
- }
- }
- returnfalse;
- }
- };
即可修复这个bug,并且也同样实现了OnClickListener的功能,可以把原Panel的OnClickListener给删掉了!
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