android自定义开关控件-SlideSwitch的实例

package com.example.hellojni;  import android.content.Context; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.Typeface; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup.LayoutParams;  /**  * SlideSwitch 仿iphone滑动开关组件，仿百度魔图滑动开关组件  * 组件分为三种状态：打开、关闭、正在滑动<br/>  * 使用方法：      * <pre>SlideSwitch slideSwitch = new SlideSwitch(this);  *slideSwitch.setOnSwitchChangedListener(onSwitchChangedListener);  *linearLayout.addView(slideSwitch); </pre> 注：也可以加载在xml里面使用  * @author scott  *  */ public class SlideSwitch extends View {   public static final String TAG = "SlideSwitch";   public static final int SWITCH_OFF = 0;//关闭状态   public static final int SWITCH_ON = 1;//打开状态   public static final int SWITCH_SCROLING = 2;//滚动状态      //用于显示的文本   private String mOnText = "打开";   private String mOffText = "关闭";    private int mSwitchStatus = SWITCH_OFF;    private boolean mHasScrolled = false;//表示是否发生过滚动    private int mSrcX = 0, mDstX = 0;      private int mBmpWidth = 0;   private int mBmpHeight = 0;   private int mThumbWidth = 0;    private   Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);      private OnSwitchChangedListener mOnSwitchChangedListener = null;    //开关状态图   Bitmap mSwitch_off, mSwitch_on, mSwitch_thumb;    public SlideSwitch(Context context)    {     this(context, null);   }    public SlideSwitch(Context context, AttributeSet attrs)    {     super(context, attrs);     init();   }    public SlideSwitch(Context context, AttributeSet attrs, int defStyle)   {     super(context, attrs, defStyle);     init();   }    //初始化三幅图片   private void init()   {     Resources res = getResources();     mSwitch_off = BitmapFactory.decodeResource(res, R.drawable.bg_switch_off);     mSwitch_on = BitmapFactory.decodeResource(res, R.drawable.bg_switch_on);     mSwitch_thumb = BitmapFactory.decodeResource(res, R.drawable.switch_thumb);     mBmpWidth = mSwitch_on.getWidth();     mBmpHeight = mSwitch_on.getHeight();     mThumbWidth = mSwitch_thumb.getWidth();   }    @Override   public void setLayoutParams(LayoutParams params)    {     params.width = mBmpWidth;     params.height = mBmpHeight;     super.setLayoutParams(params);   }      /**    * 为开关控件设置状态改变监听函数    * @param onSwitchChangedListener 参见 {@link OnSwitchChangedListener}    */   public void setOnSwitchChangedListener(OnSwitchChangedListener onSwitchChangedListener)   {     mOnSwitchChangedListener = onSwitchChangedListener;   }      /**    * 设置开关上面的文本    * @param onText 控件打开时要显示的文本    * @param offText 控件关闭时要显示的文本    */   public void setText(final String onText, final String offText)   {     mOnText = onText;     mOffText =offText;     invalidate();   }      /**    * 设置开关的状态    * @param on 是否打开开关 打开为true 关闭为false    */   public void setStatus(boolean on)   {     mSwitchStatus = ( on ? SWITCH_ON : SWITCH_OFF);   }      @Override   public boolean onTouchEvent(MotionEvent event)   {     int action = event.getAction();     Log.d(TAG, "onTouchEvent x=" + event.getX());     switch (action) {     case MotionEvent.ACTION_DOWN:       mSrcX = (int) event.getX();       break;     case MotionEvent.ACTION_MOVE:       mDstX = Math.max( (int) event.getX(), 10);       mDstX = Math.min( mDstX, 62);       if(mSrcX == mDstX)         return true;       mHasScrolled = true;       AnimationTransRunnable aTransRunnable = new AnimationTransRunnable(mSrcX, mDstX, 0);       new Thread(aTransRunnable).start();       mSrcX = mDstX;       break;     case MotionEvent.ACTION_UP:       if(mHasScrolled == false)//如果没有发生过滑动，就意味着这是一次单击过程       {         mSwitchStatus = Math.abs(mSwitchStatus-1);         int xFrom = 10, xTo = 62;         if(mSwitchStatus == SWITCH_OFF)         {           xFrom = 62;           xTo = 10;         }         AnimationTransRunnable runnable = new AnimationTransRunnable(xFrom, xTo, 1);         new Thread(runnable).start();       }       else       {         invalidate();         mHasScrolled = false;       }       //状态改变的时候 回调事件函数       if(mOnSwitchChangedListener != null)       {         mOnSwitchChangedListener.onSwitchChanged(this, mSwitchStatus);       }       break;      default:       break;     }     return true;   }    @Override   protected void onSizeChanged(int w, int h, int oldw, int oldh)   {     super.onSizeChanged(w, h, oldw, oldh);   }    @Override   protected void onDraw(Canvas canvas)   {     super.onDraw(canvas);     //绘图的时候 内部用到了一些数值的硬编码，其实不太好，     //主要是考虑到图片的原因，图片周围有透明边界，所以要有一定的偏移     //硬编码的数值只要看懂了代码，其实可以理解其含义，可以做相应改进。     mPaint.setTextSize(14);     mPaint.setTypeface(Typeface.DEFAULT_BOLD);          if(mSwitchStatus == SWITCH_OFF)     {       drawBitmap(canvas, null, null, mSwitch_off);       drawBitmap(canvas, null, null, mSwitch_thumb);       mPaint.setColor(Color.rgb(105, 105, 105));       canvas.translate(mSwitch_thumb.getWidth(), 0);       canvas.drawText(mOffText, 0, 20, mPaint);     }     else if(mSwitchStatus == SWITCH_ON)     {       drawBitmap(canvas, null, null, mSwitch_on);       int count = canvas.save();       canvas.translate(mSwitch_on.getWidth() - mSwitch_thumb.getWidth(), 0);       drawBitmap(canvas, null, null, mSwitch_thumb);       mPaint.setColor(Color.WHITE);       canvas.restoreToCount(count);       canvas.drawText(mOnText, 17, 20, mPaint);     }     else //SWITCH_SCROLING     {       mSwitchStatus = mDstX > 35 ? SWITCH_ON : SWITCH_OFF;       drawBitmap(canvas, new Rect(0, 0, mDstX, mBmpHeight), new Rect(0, 0, (int)mDstX, mBmpHeight), mSwitch_on);       mPaint.setColor(Color.WHITE);       canvas.drawText(mOnText, 17, 20, mPaint);        int count = canvas.save();       canvas.translate(mDstX, 0);       drawBitmap(canvas, new Rect(mDstX, 0, mBmpWidth, mBmpHeight),              new Rect(0, 0, mBmpWidth - mDstX, mBmpHeight), mSwitch_off);       canvas.restoreToCount(count);        count = canvas.save();       canvas.clipRect(mDstX, 0, mBmpWidth, mBmpHeight);       canvas.translate(mThumbWidth, 0);       mPaint.setColor(Color.rgb(105, 105, 105));       canvas.drawText(mOffText, 0, 20, mPaint);       canvas.restoreToCount(count);        count = canvas.save();       canvas.translate(mDstX - mThumbWidth / 2, 0);       drawBitmap(canvas, null, null, mSwitch_thumb);       canvas.restoreToCount(count);     }    }    public void drawBitmap(Canvas canvas, Rect src, Rect dst, Bitmap bitmap)   {     dst = (dst == null ? new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()) : dst);     Paint paint = new Paint();     canvas.drawBitmap(bitmap, src, dst, paint);   }    /**    * AnimationTransRunnable 做滑动动画所使用的线程    */   private class AnimationTransRunnable implements Runnable   {     private int srcX, dstX;     private int duration;      /**      * 滑动动画      * @param srcX 滑动起始点      * @param dstX 滑动终止点      * @param duration 是否采用动画，1采用，0不采用      */     public AnimationTransRunnable(float srcX, float dstX, final int duration)     {       this.srcX = (int)srcX;       this.dstX = (int)dstX;       this.duration = duration;     }      @Override     public void run()      {       final int patch = (dstX > srcX ? 5 : -5);       if(duration == 0)       {         SlideSwitch.this.mSwitchStatus = SWITCH_SCROLING;         SlideSwitch.this.postInvalidate();       }       else       {         Log.d(TAG, "start Animation: [ " + srcX + " , " + dstX + " ]");         int x = srcX + patch;         while (Math.abs(x-dstX) > 5)          {           mDstX = x;           SlideSwitch.this.mSwitchStatus = SWITCH_SCROLING;           SlideSwitch.this.postInvalidate();           x += patch;           try            {             Thread.sleep(10);           }            catch (InterruptedException e)           {             e.printStackTrace();           }         }         mDstX = dstX;         SlideSwitch.this.mSwitchStatus = mDstX > 35 ? SWITCH_ON : SWITCH_OFF;         SlideSwitch.this.postInvalidate();       }     }    }    public static interface OnSwitchChangedListener   {     /**      * 状态改变 回调函数      * @param status SWITCH_ON表示打开 SWITCH_OFF表示关闭      */     public abstract void onSwitchChanged(SlideSwitch obj, int status);   }  } 

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="fill_parent"   android:layout_height="fill_parent"   android:background="#fdfdfd"   android:orientation="vertical"   android:paddingLeft="10dip"   android:paddingRight="10dip" >    <ImageView     android:id="@+id/imageView1"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:src="@drawable/top" />    <RelativeLayout     android:layout_width="fill_parent"     android:layout_height="wrap_content" >      <TextView       android:id="@+id/textView1"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_alignParentLeft="true"       android:layout_centerVertical="true"       android:text="网络构图"       android:textSize="15sp" />      <com.example.hellojni.SlideSwitch       android:id="@+id/slideSwitch1"       android:layout_width="116dip"       android:layout_height="46dip"       android:layout_alignParentRight="true"       android:layout_centerVertical="true" />   </RelativeLayout>    <RelativeLayout     android:layout_width="fill_parent"     android:layout_height="wrap_content" >      <TextView       android:id="@+id/textView2"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_alignParentLeft="true"       android:layout_centerVertical="true"       android:text="保留原图"       android:textSize="15sp" />      <com.example.hellojni.SlideSwitch       android:id="@+id/slideSwitch2"       android:layout_width="116dip"       android:layout_height="46dip"       android:layout_alignParentRight="true"       android:layout_centerVertical="true" />   </RelativeLayout>    <RelativeLayout     android:layout_width="fill_parent"     android:layout_height="wrap_content" >      <TextView       android:id="@+id/textView3"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_alignParentLeft="true"       android:layout_centerVertical="true"       android:text="拍照声音"       android:textSize="15sp" />      <com.example.hellojni.SlideSwitch       android:id="@+id/slideSwitch3"       android:layout_width="116px"       android:layout_height="46px"       android:layout_alignParentRight="true"       android:layout_centerVertical="true" />   </RelativeLayout>    <TextView     android:id="@+id/textViewTip"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:gravity="center"     android:text="TextView" />  </LinearLayout>