android View上面实现类似Swing的控件

android View下面实现类似Swing的控件

今天闲来无事想了下swing的UI实现，总感觉跟android设计思路不同， swing可以层层嵌套，一个容器套一个容器

而android确只能通过xml来实现，而且做游戏的话，用系统控件几乎不太可能。 因为view不能包含view，

因为自己想实现一个小例子，那就是在view中自己实现一个button类， 从而就像添加系统组件那样添加。

开始毫无思路，因为监听那块我java底子比较薄，偷看了下swing的源码，还是蒙蒙的，swing太多了。

后来翻到了一个高手的博客。询问了一翻。 有了点思路。于是自己动手试了试。虽然实现方法很二

但是通过这个，让自己加深了对接口的了解。 还是基础重要啊，哎

还是先上图

只实现了文字。

package com.example.test1;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Paint.Align;import android.graphics.Paint.FontMetrics;import android.graphics.Rect;import android.view.MotionEvent;public class JButton extends JComponent{Canvas canvas;private String Text;private Rect rect;public JButton(String text){this.Text=text;}public String getText() {return Text;}public void setText(String text) {Text = text;}@Overridepublic void paint(Canvas canvas) {// TODO Auto-generated method stubPaint paint=new Paint();FontMetrics fMetrics=paint.getFontMetrics();float x=getWidth()/2;float y=getHeight()/2-(fMetrics.ascent+fMetrics.descent)/2;paint.setTextAlign(Align.CENTER);rect=new Rect(getX(), getY(), getX()+getWidth(), getY()+getHeight());paint.setColor(Color.BLUE);canvas.drawRect(rect, paint);paint.setColor(Color.WHITE);paint.setTextSize(getWidth()/4);canvas.drawText(getText(), x+getX(), y+getY(), paint);}@Overridepublic void repaint() {// TODO Auto-generated method stubpaint(canvas);}public Boolean isCicked(MotionEvent event){return rect.contains((int)event.getX(), (int)event.getY());}}

package com.example.test1;import android.graphics.Canvas;public abstract class JComponent {private int x;private int y;private int width,height;public int getWidth() {return width;}public void setWidth(int width) {this.width = width;}public int getHeight() {return height;}public void setHeight(int height) {this.height = height;}public TouchListener touchListener;public void setSize(int w,int h){this.width=w;this.height=h;}public void setLocation(int x,int y){this.x=x;this.y=y;}public int getX() {return x;}public void setX(int x) {this.x = x;}public int getY() {return y;}public void setY(int y) {this.y = y;}public void addTouchListener(TouchListener t){this.touchListener=t;}public abstract void paint(Canvas canvas);public abstract void repaint();}

package com.example.test1;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.graphics.Canvas;import android.util.Log;import android.view.MotionEvent;import android.view.View;public class MyView extends View{public static List<JComponent> container=new ArrayList<JComponent>();public MyView(Context context) {super(context);//container=new ArrayList<JComponent>();JButton jButton=new JButton("hello");jButton.setSize(100, 50);jButton.setLocation(30, 30);jButton.addTouchListener(new TouchListener() {@Overridepublic void onClick() {// TODO Auto-generated method stubLog.i("mylog", "被点击");}});container.add(jButton);invalidate();}//绘图函数@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);for(int i=0,len=container.size();i<len;i++){if(container.get(i) instanceof JButton){JButton jButton=(JButton)container.get(i);jButton.paint(canvas);}}}//触摸事件@Overridepublic boolean onTouchEvent(MotionEvent event) {for(int i=0,len=container.size();i<len;i++){if(container.get(i) instanceof JButton){JButton jButton=(JButton)container.get(i);if(jButton.isCicked(event))jButton.touchListener.onClick();}}return super.onTouchEvent(event);}}

package com.example.test1;public interface TouchListener {public void onClick();}