android滑动按钮事件

今天纪录一下滑动按钮功能。。

首先效果图：

然后是分别建立三个文件，第一个是main.class，第二个是SlipButton.class,第三个是 onchangeListener.class

main.class

[c-sharp:nogutter] view plain copy print ?

importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.widget.Toast;
publicclassMainextendsActivityimplementsOnChangedListener{
/**Calledwhentheactivityisfirstcreated.*/
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
SlipButtonmyBtn=(SlipButton)findViewById(R.id.slipBtn);//获得指定控件
myBtn.SetOnChangedListener(this);//为控件设置监听器
}
@Override
publicvoidOnChanged(booleanCheckState){//当按钮状态被改变时
//TODOAuto-generatedmethodstub
if(CheckState)
Toast.makeText(this,"打开了...",Toast.LENGTH_SHORT).show();
else
Toast.makeText(this,"关闭了...",Toast.LENGTH_SHORT).show();
}
}

import android.app.Activity; import android.os.Bundle; import android.widget.Toast; public class Main extends Activity implements OnChangedListener { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); SlipButton myBtn =(SlipButton) findViewById(R.id.slipBtn);//获得指定控件 myBtn.SetOnChangedListener(this);//为控件设置监听器 } @Override public void OnChanged(boolean CheckState) {//当按钮状态被改变时 // TODO Auto-generated method stub if(CheckState) Toast.makeText(this,"打开了..." , Toast.LENGTH_SHORT).show(); else Toast.makeText(this,"关闭了..." , Toast.LENGTH_SHORT).show(); } }

SlipButton.class

[c-sharp] view plain copy print ?

importandroid.content.Context;
importandroid.graphics.Bitmap;
importandroid.graphics.BitmapFactory;
importandroid.graphics.Canvas;
importandroid.graphics.Matrix;
importandroid.graphics.Paint;
importandroid.graphics.Rect;
importandroid.util.AttributeSet;
importandroid.view.MotionEvent;
importandroid.view.View;
importandroid.view.View.OnTouchListener;
publicclassSlipButtonextendsViewimplementsOnTouchListener{
privatebooleanNowChoose=false;//记录当前按钮是否打开,true为打开,flase为关闭
privatebooleanOnSlip=false;//记录用户是否在滑动的变量
privatefloatDownX,NowX;//按下时的x,当前的x,
privateRectBtn_On,Btn_Off;//打开和关闭状态下,游标的Rect
privatebooleanisChgLsnOn=false;
privateOnChangedListenerChgLsn;
privateBitmapbg_on,bg_off,slip_btn;
publicSlipButton(Contextcontext){
super(context);
//TODOAuto-generatedconstructorstub
init();
}
publicSlipButton(Contextcontext,AttributeSetattrs){
super(context,attrs);
//TODOAuto-generatedconstructorstub
init();
}
privatevoidinit(){//初始化
//载入图片资源
bg_on=BitmapFactory.decodeResource(getResources(),R.drawable.slip_bg_on);
bg_off=BitmapFactory.decodeResource(getResources(),R.drawable.slip_bg_off);
slip_btn=BitmapFactory.decodeResource(getResources(),R.drawable.slip_btn);
//获得需要的Rect数据
Btn_On=newRect(0,0,slip_btn.getWidth(),slip_btn.getHeight());
Btn_Off=newRect(
bg_off.getWidth()-slip_btn.getWidth(),
0,
bg_off.getWidth(),
slip_btn.getHeight());
setOnTouchListener(this);//设置监听器,也可以直接复写OnTouchEvent
}
@Override
protectedvoidonDraw(Canvascanvas){//绘图函数
//TODOAuto-generatedmethodstub
super.onDraw(canvas);
Matrixmatrix=newMatrix();
Paintpaint=newPaint();
floatx;
{
if(NowX<(bg_on.getWidth()/2))//滑动到前半段与后半段的背景不同,在此做判断
canvas.drawBitmap(bg_off,matrix,paint);//画出关闭时的背景
else
canvas.drawBitmap(bg_on,matrix,paint);//画出打开时的背景
if(OnSlip)//是否是在滑动状态,
{
if(NowX>=bg_on.getWidth())//是否划出指定范围,不能让游标跑到外头,必须做这个判断
x=bg_on.getWidth()-slip_btn.getWidth()/2;//减去游标1/2的长度...
else
x=NowX-slip_btn.getWidth()/2;
}else{//非滑动状态
if(NowChoose)//根据现在的开关状态设置画游标的位置
x=Btn_Off.left;
else
x=Btn_On.left;
}
if(x<0)//对游标位置进行异常判断...
x=0;
elseif(x>bg_on.getWidth()-slip_btn.getWidth())
x=bg_on.getWidth()-slip_btn.getWidth();
canvas.drawBitmap(slip_btn,x,0,paint);//画出游标.
}
}
@Override
publicbooleanonTouch(Viewv,MotionEventevent){
//TODOAuto-generatedmethodstub
switch(event.getAction())//根据动作来执行代码
{
caseMotionEvent.ACTION_MOVE://滑动
NowX=event.getX();
break;
caseMotionEvent.ACTION_DOWN://按下
if(event.getX()>bg_on.getWidth()||event.getY()>bg_on.getHeight())
returnfalse;
OnSlip=true;
DownX=event.getX();
NowX=DownX;
break;
caseMotionEvent.ACTION_UP://松开
OnSlip=false;
booleanLastChoose=NowChoose;
if(event.getX()>=(bg_on.getWidth()/2))
NowChoose=true;
else
NowChoose=false;
if(isChgLsnOn&&(LastChoose!=NowChoose))//如果设置了监听器,就调用其方法..
ChgLsn.OnChanged(NowChoose);
break;
default:
}
invalidate();//重画控件
returntrue;
}
publicvoidSetOnChangedListener(OnChangedListenerl){//设置监听器,当状态修改的时候
isChgLsnOn=true;
ChgLsn=l;
}
}

import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.Rect; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; public class SlipButton extends View implements OnTouchListener{ private boolean NowChoose = false;//记录当前按钮是否打开,true为打开,flase为关闭 private boolean OnSlip = false;//记录用户是否在滑动的变量 private float DownX,NowX;//按下时的x,当前的x, private Rect Btn_On,Btn_Off;//打开和关闭状态下,游标的Rect private boolean isChgLsnOn = false; private OnChangedListener ChgLsn; private Bitmap bg_on,bg_off,slip_btn; public SlipButton(Context context) { super(context); // TODO Auto-generated constructor stub init(); } public SlipButton(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub init(); } private void init(){//初始化 //载入图片资源 bg_on = BitmapFactory.decodeResource(getResources(), R.drawable.slip_bg_on); bg_off = BitmapFactory.decodeResource(getResources(), R.drawable.slip_bg_off); slip_btn = BitmapFactory.decodeResource(getResources(), R.drawable.slip_btn); //获得需要的Rect数据 Btn_On = new Rect(0,0,slip_btn.getWidth(),slip_btn.getHeight()); Btn_Off = new Rect( bg_off.getWidth()-slip_btn.getWidth(), 0, bg_off.getWidth(), slip_btn.getHeight()); setOnTouchListener(this);//设置监听器,也可以直接复写OnTouchEvent } @Override protected void onDraw(Canvas canvas) {//绘图函数 // TODO Auto-generated method stub super.onDraw(canvas); Matrix matrix = new Matrix(); Paint paint = new Paint(); float x; { if(NowX<(bg_on.getWidth()/2))//滑动到前半段与后半段的背景不同,在此做判断 canvas.drawBitmap(bg_off,matrix, paint);//画出关闭时的背景 else canvas.drawBitmap(bg_on,matrix, paint);//画出打开时的背景 if(OnSlip)//是否是在滑动状态, { if(NowX >= bg_on.getWidth())//是否划出指定范围,不能让游标跑到外头,必须做这个判断 x = bg_on.getWidth()-slip_btn.getWidth()/2;//减去游标1/2的长度... else x = NowX - slip_btn.getWidth()/2; }else{//非滑动状态 if(NowChoose)//根据现在的开关状态设置画游标的位置 x = Btn_Off.left; else x = Btn_On.left; } if(x<0)//对游标位置进行异常判断... x = 0; else if(x>bg_on.getWidth()-slip_btn.getWidth()) x = bg_on.getWidth()-slip_btn.getWidth(); canvas.drawBitmap(slip_btn,x, 0, paint);//画出游标. } } @Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub switch(event.getAction())//根据动作来执行代码 { case MotionEvent.ACTION_MOVE://滑动 NowX = event.getX(); break; case MotionEvent.ACTION_DOWN://按下 if(event.getX()>bg_on.getWidth()||event.getY()>bg_on.getHeight()) return false; OnSlip = true; DownX = event.getX(); NowX = DownX; break; case MotionEvent.ACTION_UP://松开 OnSlip = false; boolean LastChoose = NowChoose; if(event.getX()>=(bg_on.getWidth()/2)) NowChoose = true; else NowChoose = false; if(isChgLsnOn&&(LastChoose!=NowChoose))//如果设置了监听器,就调用其方法.. ChgLsn.OnChanged(NowChoose); break; default: } invalidate();//重画控件 return true; } public void SetOnChangedListener(OnChangedListener l){//设置监听器,当状态修改的时候 isChgLsnOn = true; ChgLsn = l; } }

onchangeListener.class

[c-sharp] view plain copy print ?

packageCMD100.demo.slipButton;
publicinterfaceOnChangedListener{
abstractvoidOnChanged(booleanCheckState);
}

package CMD100.demo.slipButton; public interface OnChangedListener { abstract void OnChanged(boolean CheckState); }

main.xml代码

[c-sharp] view plain copy print ?

<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#ff0000"
>
<TextView
android:text="测试:"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<CMD100.demo.slipButton.SlipButton
android:id="@+id/slipBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10sp"
/>
</LinearLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <LinearLayout android:orientation = "horizontal" android:layout_width = "fill_parent" android:layout_height = "wrap_content" android:background = "#ff0000" > <TextView android:text = "测试:" android:layout_width = "wrap_content" android:layout_height = "wrap_content" /> <CMD100.demo.slipButton.SlipButton android:id = "@+id/slipBtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft = "10sp" /> </LinearLayout> </LinearLayout>

注意：在xml里头要放置的位置

<[包名].SlipButton
android:id = "@+id/slipBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>

然后可以像其他控件一样使用了...

SlipButton myBtn =(SlipButton) findViewById(R.id.slipBtn);
myBtn.SetOnChangedListener(...);

代码到这里就全部完成了。

原创作者是：zcmmwbd

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