Android 自定义九宫格手势锁

概述 预览效果图如下：主要的方法是重写View.onTouchEvent(MotionEventevent),常用的三个 *** 作：ACTION_DOWN手指触摸屏幕;ACTION_UP手指离开屏幕;

 预览效果图如下：

主要的方法是重写VIEw.ontouchEvent( MotionEvent event ),常用的三个 *** 作：ACTION_DOWN 手指触摸屏幕 ; ACTION_UP 手指离开屏幕;

ACTION_MOVE手指在屏幕滑动。

如果该方法返回true ，表示该事件已经被VIEw处理，不再向上层的VIEw或Activity传递 ； 如果返回false， 表示事件未处理，继续传递。

具体代码如下:

package com.ninegrID;import androID.content.Context;import androID.graphics.Canvas;import androID.graphics.color;import androID.graphics.Paint;import androID.util.AttributeSet;import androID.vIEw.MotionEvent;import androID.vIEw.VIEw;/** * Created by administrator on 2017/6/24. */public class SuduVIEw extends VIEw {  //定义默认常量  private static final int DEFAulT_CELL_WIDTH = 200 ;  private static final int DEFAulT_CELL_stroke_WIDTH = 10 ;  private static final int DEFAulT_SPACE = 100 ;  //九宫格数组  private Cell mCells[] = new Cell[9] ;  //直径  private int mCellWIDth;  //半径  private int mCellRadius;  //边框宽度  private int mCellstrokeWIDth;  //空白部分  private int mSpace ;  //定义画笔  private Paint mPaintnormal ;  private Paint mPaintSelected ;  private float mCurrentX ;  private float mCurrentY ;  //判断是否结束的标识  private boolean mFinish = false ;  private StringBuffer mSbSelected = new StringBuffer(20);  public SuduVIEw(Context context) {    super(context);    init();  }  public SuduVIEw(Context context,AttributeSet attrs) {    super(context,attrs);    init();  }  public SuduVIEw(Context context,AttributeSet attrs,int defStyleAttr) {    super(context,attrs,defStyleAttr);    init();  }  private voID init(){    //初始化画笔    mCellWIDth = DEFAulT_CELL_WIDTH ;    mCellRadius = DEFAulT_CELL_WIDTH >> 1 ;    mCellstrokeWIDth = DEFAulT_CELL_stroke_WIDTH ;    mSpace = DEFAulT_SPACE ;    mPaintnormal = new Paint();    mPaintnormal.setcolor(color.WHITE);    mPaintnormal.setstrokeWIDth(mCellstrokeWIDth);    mPaintnormal.setStyle(Paint.Style.stroke);    mPaintnormal.setAntiAlias(true);    mPaintSelected = new Paint();    mPaintSelected.setcolor(color.CYAN);    mPaintSelected.setstrokeWIDth(mCellstrokeWIDth);    mPaintSelected.setStyle(Paint.Style.stroke);    mPaintSelected.setAntiAlias(true);    Cell cell ;    float x;    float y;    //计算每个格子的坐标    for( int i = 0 ; i < 9 ; i ++ ){      x = mSpace * ( i%3 + 1 ) + mCellRadius + mCellWIDth * ( i%3 ) ;      y = mSpace * ( i/3 + 1 ) + mCellRadius + mCellWIDth * ( i/3 ) ;      cell = new Cell(x,y);      mCells[i] = cell ;    }  }  @OverrIDe  protected voID onDraw(Canvas canvas) {    super.onDraw(canvas);    drawCell(canvas);    drawline(canvas);  }  //绘制连接线  private voID drawline( Canvas canvas ){    if("".equals(mSbSelected.toString())){      return;    }    String[] selectedindexs = mSbSelected.toString().split(",");    Cell cell = mCells[Integer.valueOf(selectedindexs[0])];    Cell nextCell ;    //绘制每两个格子中心点之间的连接线    if( selectedindexs.length > 1) {      for (int i = 1; i < selectedindexs.length; i++) {        nextCell = mCells[Integer.valueOf(selectedindexs[i])];        canvas.drawline(cell.getCenterX(),cell.getCenterY(),nextCell.getCenterX(),nextCell.getCenterY(),mPaintSelected);        cell = nextCell;      }    }    //绘制格子到其他空白位置的连接线    if( !mFinish ) {      canvas.drawline(cell.getCenterX(),mCurrentX,mCurrentY,mPaintSelected);    }  }  private voID drawCell( Canvas canvas ){    for ( int i = 0 ; i < 9 ; i ++ ){      canvas.drawCircle(mCells[i].getCenterX(),mCells[i].getCenterY(),mCellRadius,mCells[i].isSelected() ? mPaintSelected : mPaintnormal );    }  }  //处理点击事件  @OverrIDe  public boolean ontouchEvent(MotionEvent event) {    switch ( event.getAction()){      case MotionEvent.ACTION_DOWN:        //如果手指已经松开，则所有格子变为初始状态        if( mFinish ){          for ( int i = 0 ; i < 9 ; i ++ ){            mCells[i].setSelected(false);          }          mFinish = false ;          mSbSelected.delete(0,mSbSelected.length());          invalIDate();          return false;        }        handleDownEvent(event);        break;      //松开则结束      case MotionEvent.ACTION_UP:        mFinish = true ;        break;      case MotionEvent.ACTION_MOVE:        handleMoveEvent(event);        break;    }    //表示已处理，不向上传递    return true ;  }  //处理手指移动的事件  private voID handleMoveEvent( MotionEvent event ){    int index = findCellindex(event.getX(),event.getY());    if( index != -1 ){      mCells[index].setSelected(true);      mSbSelected.append(index).append(",");    }    invalIDate();    mCurrentX = event.getX();    mCurrentY = event.getY();  }  //处理手指按下的事件  private voID handleDownEvent( MotionEvent event){    int index = findCellindex(event.getX(),");      invalIDate();    }    mCurrentX = event.getX();    mCurrentY = event.getY();  }  //根据坐标判断点击的哪个格子  private int findCellindex( float x,float y){    float cellX ;    float cellY ;    int result = -1 ;    for( int i = 0 ; i < 9 ; i ++ ){      if( mCells[i].isSelected()){        continue;      }      //获取每个格子的坐标      cellX = mCells[i].getCenterX();      cellY = mCells[i].getCenterY();      //计算按下的点到每个格子的距离      float tempX = cellX - x ;      float tempY = cellY - y ;      float distance = (float) Math.sqrt(tempX * tempX + tempY * tempY);      //如果点击的位置在某个格子的圆内      if( distance < mCellRadius ){        result = i ;        break;      }    }    //返回该格子的位置    return result ;  }}

最后在布局文件中引用该VIEw即可，若想实现更高的定制性，可以仿照上一篇文章重写VIEw的onMearsure方法并增加自定义属性。

以上所述是小编给大家介绍的AndroID 自定义九宫格手势锁，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对编程小技巧网站的支持！

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