安卓图形解锁

  1 package com.hrk.notepad;

import java.util.ArrayList;
import java.util.List;

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;

public class DrawPassword extends View
{
    private boolean[] visited = null;
    private List<Integer> list = null;
    private float[][][] points = null;
    private float radius;
    private float curx, cury;
    private Paint unvisitedPaint = null;
    private Paint visitedPaint = null;
    private Paint circlePaint = null;
    private Paint linePaint = null;
    private onFinishListener listener = null;

    public DrawPassword(Context context, AttributeSet attrs, int defStyleAttr)
    {
        super(context, attrs, defStyleAttr);
        init();
    }

    public DrawPassword(Context context, AttributeSet attrs)
    {
        super(context, attrs);
        init();
    }

    public DrawPassword(Context context)
    {
        super(context);
        init();
    }

    private void init()
    {
        visited = new boolean[9];
        points = new float[3][3][2];
        list = new ArrayList<Integer>();
        unvisitedPaint = new Paint();
        unvisitedPaint.setColor(Color.BLUE);
        unvisitedPaint.setAntiAlias(true);
        
        visitedPaint = new Paint();
        visitedPaint.setColor(Color.YELLOW);
        visitedPaint.setAntiAlias(true);

        circlePaint = new Paint();
        circlePaint.setColor(Color.WHITE);
        circlePaint.setAntiAlias(true);

        linePaint = new Paint();
        linePaint.setColor(Color.YELLOW);
        linePaint.setAntiAlias(true);
        
    }

    protected void onSizeChanged(int w, int h, int oldw, int oldh)
    {
        // TODO Auto-generated method stub
        super.onSizeChanged(w, h, oldw, oldh);
        setMeasuredDimension(w, h);
        float wdis = w / 4, hdis = h / 4;
        radius = Math.min(wdis, hdis) / 2.3f;
        linePaint.setStrokeWidth(radius/5);
        for (int i = 0; i < 3; i++)
        {
            for (int j = 0; j < 3; j++)
            {
                points[i][j][0] = wdis * (j + 1);
                points[i][j][1] = hdis * (i + 1);
            }
        }
    }

    @Override
    protected void onDraw(Canvas canvas)
    {
        // TODO Auto-generated method stub
        super.onDraw(canvas);
        for (int i = 0; i < 3; i++)
        {
            for (int j = 0; j < 3; j++)
            {
                canvas.drawCircle(points[i][j][0], points[i][j][1], radius, circlePaint);
                if(visited[i*3+j])
                {
                    canvas.drawCircle(points[i][j][0], points[i][j][1], radius / 4, visitedPaint);
                }
                else
                {
                    canvas.drawCircle(points[i][j][0], points[i][j][1], radius / 4, unvisitedPaint);
                }
            }
        }
        if (list.size() > 0)
        {
            int i;
            for(i=0;i<list.size()-1;i++)
            {
                canvas.drawLine(points[list.get(i)/3][list.get(i)%3][0], 
                        points[list.get(i)/3][list.get(i)%3][1],
                        points[list.get(i+1)/3][list.get(i+1)%3][0],
                        points[list.get(i+1)/3][list.get(i+1)%3][1],
                        linePaint);
            }
            if(curx>=0&&cury>=0)
            canvas.drawLine(points[list.get(i)/3][list.get(i)%3][0], 
                    points[list.get(i)/3][list.get(i)%3][1],
                    curx,
                    cury,
                    linePaint);
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event)
    {
        // TODO Auto-generated method stub
        switch (event.getActionMasked())
        {
        case MotionEvent.ACTION_DOWN:
            curx = event.getX();
            cury = event.getY();
            break;

        case MotionEvent.ACTION_UP:
            
            if(list.size()>0)
            {
                curx=-1;
                cury=-1;
                if(listener!=null)
                    listener.onFinished(list.toString());
            }
            break;

        case MotionEvent.ACTION_MOVE:
            
            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    if(Math.sqrt((event.getX() - points[i][j][0]) * (event.getX() - points[i][j][0]) + (event.getY() - points[i][j][1]) * (event.getY() - points[i][j][1]))<radius&&visited[i*3+j]==false)
                    {
                        visited[i*3+j]=true;
                        list.add(i*3+j);
                    }
                }
            }
            curx = event.getX();
            cury = event.getY();
            break;

        default:
            break;
        }
        postInvalidate();
        return true;
    }
    
    public void setOnFinishListener(onFinishListener listener)
    {
        this.listener = listener;
    }
    
    public void reset()
    {
        list.clear();
        postInvalidate();
    }
    
    public String getPassword()
    {
        if(list.size()>0)
        {
            return list.toString();
        }
        else
        {
            return "";
        }
    }
    
    public interface onFinishListener
    {
        void onFinished(String password);
    }
}

自己写的安卓图形解锁代码，转载请注明出处：http://www.cnblogs.com/hrkblogs/