dokunmatik olayı görünümü boyutlandırılabilir nasıl yapılır

Question

ben .. onun köşesini sürükleyerek vurgulanan görünümün şeklini değiştirmek dikdörtgen olmalıdır köşesini sürükleyerek sonra görünümü necessory değil istediğiniz aşağıdaki Görüntüyü

Bkz Bu herhangi bir aritmetik şekil

nasıl elde edilebilir?

şimdi dokunmatik olayı hareketli 4 köşe yapmış ama şekil internetten Bu kodu var

package com.assignment.DragDrop; 

import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Point; 
import android.graphics.drawable.BitmapDrawable; 
import android.graphics.drawable.Drawable; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.ImageView; 

public class DrawView extends View { 


    Point point1,point2,point3,point4; 
    private ColorBall[] colorballs = new ColorBall[4]; // array that holds the balls 
    private int balID = 0; // variable to know what ball is being dragged 
    Paint paint; 
    Canvas canvas; 
    public DrawView(Context context) { 
     super(context); 
     paint=new Paint(); 
     setFocusable(true); //necessary for getting the touch events 
     canvas= new Canvas(); 
     // setting the start point for the balls 
     point1 = new Point(); 
     point1.x = 50; 
     point1.y = 20; 

     point2 = new Point(); 
     point2.x = 150; 
     point2.y = 20; 

     point3 = new Point(); 
     point3.x = 150; 
     point3.y = 120; 

     point4 = new Point(); 
     point4.x = 50; 
     point4.y = 120; 


     // declare each ball with the ColorBall class 
     colorballs[0] = new ColorBall(context,R.drawable.bol_blauw, point1); 
     colorballs[1] = new ColorBall(context,R.drawable.bol_blauw, point2); 
     colorballs[2] = new ColorBall(context,R.drawable.bol_groen, point3); 
     colorballs[3] = new ColorBall(context,R.drawable.bol_geel, point4); 


    } 

    // the method that draws the balls 
    @Override protected void onDraw(Canvas canvas) { 
     //canvas.drawColor(0xFFCCCCCC);  //if you want another background color  

     paint.setAntiAlias(true); 
     paint.setDither(true); 
     paint.setColor(Color.BLACK); 
     paint.setStyle(Paint.Style.FILL); 
     paint.setStrokeJoin(Paint.Join.ROUND); 
     // mPaint.setStrokeCap(Paint.Cap.ROUND); 
     paint.setStrokeWidth(5); 


      canvas.drawPaint(paint); 
      paint.setColor(Color.WHITE); 

      canvas.drawRect(point1.x+25, point2.x, point3.x+25, point4.x, paint); 
      BitmapDrawable mBitmap; 
      mBitmap= new BitmapDrawable(); 

     // canvas.drawBitmap(bitmap, left, top, paint) 
     // shade_region_between_points(); 
     // canvas.drawLine(point1.x, point1.y, point2.x, point2.y, paint); 
     // canvas.drawLine(point1.x, point1.y, point4.x, point4.y, paint); 

     // canvas.drawLine(point4.x, point4.y, point3.x, point3.y, paint); 
     // canvas.drawLine(point2.x, point2.y, point3.x, point3.y, paint); 
      //draw the balls on the canvas 
     for (ColorBall ball : colorballs) { 
      canvas.drawBitmap(ball.getBitmap(), ball.getX(), ball.getY(), paint); 
      // canvas.drawLine(point1.x, point1.y, point2.x, point2.y, paint); 

    // canvas.drawRect(point1.x, point2.x, point3.x, point4.x, paint); 



     } 
     /*Drawable drawable = getResources().getDrawable(R.drawable.ic_launcher); 
     drawable.setBounds(point1.x+25, point2.x, point3.x+25, point4.x); 
     drawable.draw(canvas);*/ 
    } 

    // events when touching the screen 
    public boolean onTouchEvent(MotionEvent event) { 
     int eventaction = event.getAction(); 

     int X = (int)event.getX(); 
     int Y = (int)event.getY(); 

     switch (eventaction) { 

     case MotionEvent.ACTION_DOWN: // touch down so check if the finger is on a ball 
      balID = 0; 
      for (ColorBall ball : colorballs) { 
       // check if inside the bounds of the ball (circle) 
       // get the center for the ball 
       int centerX = ball.getX() + 25; 
       int centerY = ball.getY() + 25; 
       paint.setColor(Color.CYAN); 
       // calculate the radius from the touch to the center of the ball 
       double radCircle = Math.sqrt((double) (((centerX-X)*(centerX-X)) + (centerY-Y)*(centerY-Y))); 
       // canvas.drawLine(point1.x, point1.y, point2.x, point2.y, paint); 

       // if the radius is smaller then 23 (radius of a ball is 22), then it must be on the ball 
       if (radCircle < 23){ 

        balID = ball.getID(); 
        canvas.drawRect(point1.x, point2.x, point3.x, point4.x, paint); 

        invalidate(); 
        break; 
       } 
       invalidate(); 

       //canvas.drawRect(point1.x, point2.x, point3.x, point4.x, paint); 
       // check all the bounds of the ball (square) 
       //if (X > ball.getX() && X < ball.getX()+50 && Y > ball.getY() && Y < ball.getY()+50){ 
       // balID = ball.getID(); 
       // break; 
       //} 
      } 

      break; 


     case MotionEvent.ACTION_MOVE: // touch drag with the ball 
      // move the balls the same as the finger 
      if (balID > 0) { 
      try { 
       colorballs[balID-1].setX(X-25); 
        colorballs[balID-1].setY(Y-25); 
        // canvas.drawLine(point1.x, point1.y, point2.x, point2.y, paint); 

      } catch (Exception e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      paint.setColor(Color.CYAN); 
      canvas.drawRect(point1.x, point2.x, point3.x, point4.x, paint); 
      invalidate(); 
      } 

      break; 

     case MotionEvent.ACTION_UP: 
      // touch drop - just do things here after dropping 

      break; 
     } 
     // redraw the canvas 
     invalidate(); 
     return true; 

    } 


    public void shade_region_between_points() 
    { 
     canvas.drawRect(point1.x, point2.x, point3.x, point4.x, paint); 
    } 
} 

değişmiyor.

bu olacak ... dokunma olayı ancak şekil hareket etmiyor üzerinde köşeleri hareket edebilmek

Answer 1

Onun Bİz kırpma görüntü o zaman senin rectangle.Then boyutunu artırmak yeni olarak görüşümüzü kaydedebilir zaman tıpkı bitmap.So this question'dan yardım alabilirsiniz.

Bu, gerekli olan hemen hemen aynı şeyi açıklar.

VEYA

biz

Answer 2

ardından kod dokunmatik tabanında dikdörtgen çizmek için herhangi bir görünümde dokunduğunuzda o zaman yeni yükseklik ve genişliğe sahip yeni Düzeni-Param ayarlayabilirsiniz düzen ise. depolamak için kullanılır

import java.util.ArrayList; 

import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Point; 
import android.graphics.drawable.BitmapDrawable; 
import android.util.AttributeSet; 
import android.view.MotionEvent; 
import android.view.View; 

import com.common.Utils; 
import com.example.rectangleoverlay.R; 

public class DrawView extends View { 

    Point point1, point3; 
    Point point2, point4; 

    /** 
    * point1 and point 3 are of same group and same as point 2 and point4 
    */ 
    int groupId = -1; 
    private ArrayList<ColorBall> colorballs = new ArrayList<ColorBall>(); 
    // array that holds the balls 
    private int balID = 0; 
    // variable to know what ball is being dragged 
    Paint paint; 
    Canvas canvas; 

    public DrawView(Context context) { 
     super(context); 
     paint = new Paint(); 
     setFocusable(true); // necessary for getting the touch events 
     canvas = new Canvas(); 
     // setting the start point for the balls 
     point1 = new Point(); 
     point1.x = 50; 
     point1.y = 20; 

     point2 = new Point(); 
     point2.x = 150; 
     point2.y = 20; 

     point3 = new Point(); 
     point3.x = 150; 
     point3.y = 120; 

     point4 = new Point(); 
     point4.x = 50; 
     point4.y = 120; 

     // declare each ball with the ColorBall class 
     colorballs.add(new ColorBall(context, R.drawable.gray_circle, point1)); 
     colorballs.add(new ColorBall(context, R.drawable.gray_circle, point2)); 
     colorballs.add(new ColorBall(context, R.drawable.gray_circle, point3)); 
     colorballs.add(new ColorBall(context, R.drawable.gray_circle, point4)); 

    } 

    public DrawView(Context context, AttributeSet attrs, int defStyle) { 
     super(context, attrs, defStyle); 
    } 

    public DrawView(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     paint = new Paint(); 
     setFocusable(true); // necessary for getting the touch events 
     canvas = new Canvas(); 
     // setting the start point for the balls 
     point1 = new Point(); 
     point1.x = 50; 
     point1.y = 20; 

     point2 = new Point(); 
     point2.x = 150; 
     point2.y = 20; 

     point3 = new Point(); 
     point3.x = 150; 
     point3.y = 120; 

     point4 = new Point(); 
     point4.x = 50; 
     point4.y = 120; 

     // declare each ball with the ColorBall class 
     colorballs.add(new ColorBall(context, R.drawable.gray_circle, point1)); 
     colorballs.add(new ColorBall(context, R.drawable.gray_circle, point2)); 
     colorballs.add(new ColorBall(context, R.drawable.gray_circle, point3)); 
     colorballs.add(new ColorBall(context, R.drawable.gray_circle, point4)); 

    } 

    // the method that draws the balls 
    @Override 
    protected void onDraw(Canvas canvas) { 
     // canvas.drawColor(0xFFCCCCCC); //if you want another background color 

     paint.setAntiAlias(true); 
     paint.setDither(true); 
     paint.setColor(Color.parseColor("#55000000")); 
     paint.setStyle(Paint.Style.FILL); 
     paint.setStrokeJoin(Paint.Join.ROUND); 
     // mPaint.setStrokeCap(Paint.Cap.ROUND); 
     paint.setStrokeWidth(5); 

     canvas.drawPaint(paint); 
     paint.setColor(Color.parseColor("#55FFFFFF")); 

     if (groupId == 1) { 
      canvas.drawRect(point1.x + colorballs.get(0).getWidthOfBall()/2, 
        point3.y + colorballs.get(2).getWidthOfBall()/2, point3.x 
          + colorballs.get(2).getWidthOfBall()/2, point1.y 
          + colorballs.get(0).getWidthOfBall()/2, paint); 
     } else { 
      canvas.drawRect(point2.x + colorballs.get(1).getWidthOfBall()/2, 
        point4.y + colorballs.get(3).getWidthOfBall()/2, point4.x 
          + colorballs.get(3).getWidthOfBall()/2, point2.y 
          + colorballs.get(1).getWidthOfBall()/2, paint); 
     } 
     BitmapDrawable mBitmap; 
     mBitmap = new BitmapDrawable(); 

     // draw the balls on the canvas 
     for (ColorBall ball : colorballs) { 
      canvas.drawBitmap(ball.getBitmap(), ball.getX(), ball.getY(), 
        new Paint()); 

     } 
    } 

    // events when touching the screen 
    public boolean onTouchEvent(MotionEvent event) { 
     int eventaction = event.getAction(); 

     int X = (int) event.getX(); 
     int Y = (int) event.getY(); 

     switch (eventaction) { 

     case MotionEvent.ACTION_DOWN: // touch down so check if the finger is on 
             // a ball 
      balID = -1; 
      groupId = -1; 
      for (ColorBall ball : colorballs) { 
       // check if inside the bounds of the ball (circle) 
       // get the center for the ball 
       Utils.logd("Id : " + ball.getID()); 
       Utils.logd("getX : " + ball.getX() + " getY() : " + ball.getY()); 
       int centerX = ball.getX() + ball.getWidthOfBall(); 
       int centerY = ball.getY() + ball.getHeightOfBall(); 
       paint.setColor(Color.CYAN); 
       // calculate the radius from the touch to the center of the ball 
       double radCircle = Math 
         .sqrt((double) (((centerX - X) * (centerX - X)) + (centerY - Y) 
           * (centerY - Y))); 

       Utils.logd("X : " + X + " Y : " + Y + " centerX : " + centerX 
         + " CenterY : " + centerY + " radCircle : " + radCircle); 

       if (radCircle < ball.getWidthOfBall()) { 

        balID = ball.getID(); 
        Utils.logd("Selected ball : " + balID); 
        if (balID == 1 || balID == 3) { 
         groupId = 2; 
         canvas.drawRect(point1.x, point3.y, point3.x, point1.y, 
           paint); 
        } else { 
         groupId = 1; 
         canvas.drawRect(point2.x, point4.y, point4.x, point2.y, 
           paint); 
        } 
        invalidate(); 
        break; 
       } 
       invalidate(); 
      } 

      break; 

     case MotionEvent.ACTION_MOVE: // touch drag with the ball 
      // move the balls the same as the finger 
      if (balID > -1) { 
       Utils.logd("Moving Ball : " + balID); 

       colorballs.get(balID).setX(X); 
       colorballs.get(balID).setY(Y); 

       paint.setColor(Color.CYAN); 

       if (groupId == 1) { 
        colorballs.get(1).setX(colorballs.get(0).getX()); 
        colorballs.get(1).setY(colorballs.get(2).getY()); 
        colorballs.get(3).setX(colorballs.get(2).getX()); 
        colorballs.get(3).setY(colorballs.get(0).getY()); 
        canvas.drawRect(point1.x, point3.y, point3.x, point1.y, 
          paint); 
       } else { 
        colorballs.get(0).setX(colorballs.get(1).getX()); 
        colorballs.get(0).setY(colorballs.get(3).getY()); 
        colorballs.get(2).setX(colorballs.get(3).getX()); 
        colorballs.get(2).setY(colorballs.get(1).getY()); 
        canvas.drawRect(point2.x, point4.y, point4.x, point2.y, 
          paint); 
       } 

       invalidate(); 
      } 

      break; 

     case MotionEvent.ACTION_UP: 
      // touch drop - just do things here after dropping 

      break; 
     } 
     // redraw the canvas 
     invalidate(); 
     return true; 

    } 

    public void shade_region_between_points() { 
     canvas.drawRect(point1.x, point3.y, point3.x, point1.y, paint); 
    } 
} 

takiben sınıf

import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Point; 

public class ColorBall { 

    Bitmap bitmap; 
    Context mContext; 
    Point point; 
    int id; 
    static int count = 0; 

    public ColorBall(Context context, int resourceId, Point point) { 
     this.id = count++; 
     bitmap = BitmapFactory.decodeResource(context.getResources(), 
       resourceId); 
     mContext = context; 
     this.point = point; 
    } 

    public int getWidthOfBall() { 
     return bitmap.getWidth(); 
    } 

    public int getHeightOfBall() { 
     return bitmap.getHeight(); 
    } 

    public Bitmap getBitmap() { 
     return bitmap; 
    } 

    public int getX() { 
     return point.x; 
    } 

    public int getY() { 
     return point.y; 
    } 

    public int getID() { 
     return id; 
    } 

    public void setX(int x) { 
     point.x = x; 
    } 

    public void setY(int y) { 
     point.y = y; 
    } 
}