1.支持手势拖拉
2.拖拉到一半时,可以自动展开或者收缩。
具体如下图:
本文的源码可以到这里下载:http://download.csdn.net/detail/hellogv/3642418
只贴出抽屉组件的源码,其他源文件与基础篇的一样:
[java] view plaincopyprint?
《span style=“font-family:Comic Sans MS;font-size:18px;”》public class Panel extends LinearLayout implements GestureDetector.OnGestureListener{
public interface PanelClosedEvent {
void onPanelClosed(View panel);
}
public interface PanelOpenedEvent {
void onPanelOpened(View panel);
}
private final static int HANDLE_WIDTH=30;
private final static int MOVE_WIDTH=20;
private Button btnHandler;
private LinearLayout panelContainer;
private int mRightMargin=0;
private Context mContext;
private GestureDetector mGestureDetector;
private boolean mIsScrolling=false;
private float mScrollX;
private PanelClosedEvent panelClosedEvent=null;
private PanelOpenedEvent panelOpenedEvent=null;
public Panel(Context context,View otherView,int width,int height) {
super(context);
this.mContext=context;
//定义手势识别
mGestureDetector = new GestureDetector(mContext,this);
mGestureDetector.setIsLongpressEnabled(false);
//改变Panel附近组件的属性
LayoutParams otherLP=(LayoutParams) otherView.getLayoutParams();
otherLP.weight=1;
otherView.setLayoutParams(otherLP);
//设置Panel本身的属性
LayoutParams lp=new LayoutParams(width, height);
lp.rightMargin=-lp.width+HANDLE_WIDTH;
mRightMargin=Math.abs(lp.rightMargin);
this.setLayoutParams(lp);
this.setOrientation(LinearLayout.HORIZONTAL);
//设置Handler的属性
btnHandler=new Button(context);
btnHandler.setLayoutParams(new LayoutParams(HANDLE_WIDTH,height));
//btnHandler.setOnClickListener(handlerClickEvent);
btnHandler.setOnTouchListener(handlerTouchEvent);
this.addView(btnHandler);
//设置Container的属性
panelContainer=new LinearLayout(context);
panelContainer.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT));
this.addView(panelContainer);
}
private View.OnTouchListener handlerTouchEvent=new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction()==MotionEvent.ACTION_UP && //onScroll时的ACTION_UP
mIsScrolling==true)
{
LayoutParams lp=(LayoutParams) Panel.this.getLayoutParams();
if (lp.rightMargin 》= (-mRightMargin/2)) {//往左超过一半
new AsynMove().execute(new Integer[] { MOVE_WIDTH });// 正数展开
}
else if (lp.rightMargin 《 (-mRightMargin/2)) {//往右拖拉
new AsynMove().execute(new Integer[] { -MOVE_WIDTH });// 负数收缩
}
}
return mGestureDetector.onTouchEvent(event);
}
};
/**
* 定义收缩时的回调函数
* @param event
*/
public void setPanelClosedEvent(PanelClosedEvent event)
{
this.panelClosedEvent=event;
}
/**
* 定义展开时的回调函数
* @param event
*/
public void setPanelOpenedEvent(PanelOpenedEvent event)
{
this.panelOpenedEvent=event;
}
/**
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