Android抽屉(SlidingDrawer --类似android通知栏下拉效果)
Android抽屉(SlidingDrawer)的实现发 - 红黑联盟
http://www.2cto.com/kf/201301/182507.html
可动态布局的Android抽屉之基础
http://blog.csdn.net/hellogv/article/details/6789698
android抽屉实现
http://blog.csdn.net/wangkuifeng0118/article/details/7229200
Android 使用动画效果后的控件位置处理 类似系统通知栏下拉动画
http://www.pocketdigi.com/20111028/556.html
下拉通知效果-Android源码下载
http://www.eoeandroid.com/thread-239825-1-1.html
Demo源码 下载
http://pan.baidu.com/s/1c08Esj2
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!
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