android 拖动图片拖动浮动按钮

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1、android拖动图片/拖动浮动按钮Java代码importandroid.app.Activity;importandroid.content.Context;importandroid.graphics.Canvas;importandroid.os.Bundle;importandroid.view.MotionEvent;importandroid.widget.AbsoluteLayout;importandroid.widget.Button;publicclassDrag_And_DropextendsActivity{/**Calledwhentheactivityis

2、firstcreated.*/@OverridepublicvoidonCreate(Bundleicicle){super.onCreate(icicle);MyViewtx=newMyView(this);tx.setText("DragMe");AbsoluteLayoutl=newAbsoluteLayout(this);AbsoluteLayout.LayoutParamsp=newAbsoluteLayout.LayoutParams(AbsoluteLayout.LayoutParams.WRAP_CONTENT,AbsoluteLayout.LayoutParams.W

3、RAP_CONTENT,10,10);l.addView(tx,p);setContentView(l);}}classMyViewextendsButton{publicMyView(Contextc){super(c);}@OverridepublicbooleanonMotionEvent(MotionEventevent){intaction=event.getAction();intmCurX=(int)event.getX();intmCurY=(int)event.getY();if(action==MotionEvent.ACTION_MOVE){//this.setT

4、ext("x:"+mCurX+",y:"+mCurY);AbsoluteLayout.LayoutParamsp=newAbsoluteLayout.LayoutParams(AbsoluteLayout.LayoutParams.WRAP_CONTENT,AbsoluteLayout.LayoutParams.WRAP_CONTENT,this.mLeft+mCurX,this.mTop+mCurY);this.setLayoutParams(p);}if(action==MotionEvent.ACTION_UP){//this.setText("notmoving");}retu

5、rntrue;}@Overridepublicvoiddraw(Canvascanvas){//TODOAuto-generatedmethodstubsuper.draw(canvas);}}拖拽图片效果方法一：Java代码importandroid.app.Activity;importandroid.os.Bundle;importandroid.view.MotionEvent;importandroid.view.View;importandroid.view.View.OnTouchListener;importandroid.widget.ImageView;public

6、classDragSample01extendsActivity{ImageViewimg;@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.drag_sample01);img=(ImageView)findViewById(R.id.img_view);img.setOnTouchListener(newOnTouchListener(){privateintmx,my;publicbooleanonTouc

7、h(Viewv,MotionEventevent){switch(event.getAction()){caseMotionEvent.ACTION_MOVE:mx=(int)(event.getRawX());my=(int)(event.getRawY()-50);v.layout(mx-img.getWidth()/2,my-img.getHeight()/2,mx+img.getWidth()/2,my+img.getHeight()/