android自定义滑动开关控件适合所有的android系统

1、android 自定义滑动开关控件，适合所有的 android 系统我们都知道 Android4.0 以上才带有滑动开关 Switch， 那么在4.0以下呢，很多人会选择用CheckBox，放两张图 片，但是这样子只能点击，效果不太好，所以我就自定义了 滑动开关WiperSwitch这么一个控件下面先把截图贴上吧， 这蹩脚的图片真戳啊，大家可以自己换三张图片java view plaincopypackage com.example.wiperswitch; import android.content.Context; import android.graphics.Bitmap; impo

2、rt android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Matrix; import android.graphics.Paint; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; /* *author xiaanming * */ public cl

3、ass WiperSwitch extends View implements OnTouchListener private Bitmap bg_on, bg_off, slipper_btn; /* 按下时的 x 和当前的 x */ private float downX, nowX; /* 记录用户是否在滑动 */ privateboolean onSlip = false;/* 当前的状态 */ private boolean nowStatus = false;/* * 监听接口 */privateOnChangedListener listener;publicWiperSwitc

4、h(Context context) super(context);init();public WiperSwitch(Context context,AttributeSet attrs) super(context, attrs);init(); /* * 监听接口 */privateOnChangedListener listener;publicWiperSwitch(Context context) super(context);init();public WiperSwitch(Context context,AttributeSet attrs) super(context, a

5、ttrs);init(); 入图片资源public void init()bg_on =/载BitmapFactory.decodeResource(getResources(),R.drawable.on_btn);bg_off R.drawable.on_btn);bg_off =BitmapFactory.decodeResource(getResources(),R.drawable.off_btn);slipper_btn =BitmapFactory.decodeResource(getResources(),R.drawable.white_btn);setOnTouchList

6、ener(this);protectedvoid onDraw(Canvas canvas)super.onDraw(canvas);Matrixfloat x = 0;/根据 R.drawable.off_btn);slipper_btn =BitmapFactory.decodeResource(getResources(),R.drawable.white_btn);setOnTouchListener(this);protectedvoid onDraw(Canvas canvas)super.onDraw(canvas);Matrixfloat x = 0;/根据 nowX 设置背景

7、，开或者关状态if (nowX matrix = new Matrix(); Paint paint = new Paint();(bg_on.getWidth()/2) canvas.drawBitmap(bg_off, matrix, paint);/ 画岀关闭时的背景elsecanvas.drawBitmap(bg_on, matrix, paint);/画岀打开时的背景 if (onSlip) /是否是在滑动状态,if(nowX>；二bg_on.getWidth()是否划岀指定范围,不能让滑块跑到外头,必须做这个判断bg_on.getWidth() - slipper_btn.ge

8、tWidth()/2; 减去滑块 1/2 的长度elsex = nowX -slipper_btn.getWidth()/2;elseif(nowStatus)根据当前的状态设置滑块的 x 值x = bg_on.getWidth()-slipper_btn.getWidth();else TOC o 1-5 h z x = 0;/对滑块滑动进行异常处理，不能让滑块岀界if (x bg_on.getWidth() -slipper_btn.getWidth()x =bg_on.getWidth() - slipper_btn.getWidth();/画岀滑块canvas.drawBitmap(s

9、lipper_btn, x , 0,paint);Override public booleanonTouch(View v, MotionEvent event)switch(event.getAction()caseMotionEvent.ACTION_DOWN:if(event.getX() bg_off.getWidth() | event.getY() bg_off.getHeight()returnfalse;elseonSlip =true;bg_off.getHeight()returnfalse;elseonSlip =true;downX = event.getX();no

10、wX = downX;casebreak;caseMotionEvent.ACTIONMOVE:nowX MotionEvent.ACTIONMOVE:nowX =event.getX();break;case MotionEvent.ACTION_UP:onSlip event.getX();break;case MotionEvent.ACTION_UP:onSlip =false;if(event.getX() =(bg_on.getWidth()/2)nowStatus false;if(event.getX() =(bg_on.getWidth()/2)nowStatus =true

11、;slipper_btn.getWidth();else0;nowStatus = false;nowX =if(listener !=null)listener.OnChanged(WiperSwitch.this, nowStatus);break;/刷新界面invalidate();* 为 true;slipper_btn.getWidth();else0;nowStatus = false;nowX =if(listener !=null)listener.OnChanged(WiperSwitch.this, nowStatus);break;/刷新界面invalidate();*

12、为 WiperSwitch 设置一个监听，供外部调用的方/*return true;* param listener*/public voidnowX = bg_on.getWidth() -setOnChangedListener(OnChangedListenerlistener) this.listener = listener; /* * 设置滑动开关的初始状态，供外部调用 * param checked */ public void setChecked(booleanchecked) if(checked) nowX = bg_off.getWidth(); else nowX =

13、 0; nowStatus = checked; /* * 回调接口 * author len * */ public interface OnChangedListener public void OnChanged(WiperSwitch wiperSwitch, boolean checkState); 用法是，先定义XML文件html viewplaincopy新建一个 Activityjava view plaincopypackage com.example.wiperswitch; import android.app.Activity; import android.os.Bu

14、ndle; import android.util.Log; import com.example.wiperswitch.WiperSwitch.OnChangedListen er; public class MainActivity extends Activity implements OnChangedListener Override public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);/实例化 WiperSwitch WiperSwitch wiperSwitch = (WiperSwitch)findViewById(R.id.wiperSwitch1); /设置初始状态