Android ile Tuval Üzerine Resim Ekleyin

Question

Android java'ya yeni geldim ve internette uzun bir aradan sonra düğmemizin VIEW üzerinde nasıl görüneceğini gerçekten bilmiyorum. Düğümde düzeni görebiliyorum ama hata ayıkladığımda görünmüyor. Düğme tıklandıktan sonra birden fazla resim nasıl yerleştireceğimi bilmiyorum.Lütfen kodumda yanlış yapmış olsaydım beni düzeltin. Herhangi bir yardım büyük takdir edilecektir.THANKS! aşağıdaki

Benim Kodu:

package com.example.oncanvas; 

import android.app.Activity; 

public class Main extends Activity { 

    @Override 
     public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     DrawView DrawView = new DrawView(this); 
     DrawView.setBackgroundColor(Color.WHITE); 
     setContentView(DrawView); 
     DrawView.requestFocus(); 

} 

    public class DrawView extends View { 

     private Bitmap mBitmap; 
     private Canvas mCanvas; 
     private Path mPath; 
     private Paint mBitmapPaint; 
     private Paint mPaint; 

     public DrawView(Context c) { 
      super(c); 

      mPath = new Path(); 
      mBitmapPaint = new Paint(Paint.DITHER_FLAG); 


      mPaint = new Paint(); 
      mPaint.setAntiAlias(true); 
      mPaint.setDither(true); 
      mPaint.setColor(0xFF000000); 
      mPaint.setStyle(Paint.Style.STROKE); 
      mPaint.setStrokeJoin(Paint.Join.ROUND); 
      mPaint.setStrokeCap(Paint.Cap.ROUND); 
       mPaint.setStrokeWidth(3); 
     } 

    protected void onSizeChanged(int w, int h, int oldw, int oldh) { 
     super.onSizeChanged(w, h, oldw, oldh); 
     mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); 
     mCanvas = new Canvas(mBitmap); 
    } 

    @Override 
    protected void onDraw(Canvas canvas) { 
     canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint); 

     canvas.drawPath(mPath, mPaint); 
    } 

    private float mX, mY; 
    private static final float TOUCH_TOLERANCE = 4; 

    private void touch_start(float x, float y) { 
     mPath.reset(); 
     mPath.moveTo(x, y); 
     mX = x; 
     mY = y; 
    } 
    private void touch_move(float x, float y) { 
     float dx = Math.abs(x - mX); 
     float dy = Math.abs(y - mY); 
     if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) { 
      mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2); 
      mX = x; 
      mY = y; 
     } 
    } 
    private void touch_up() { 
     mPath.lineTo(mX, mY); 
     // commit the path to our offscreen 
     mCanvas.drawPath(mPath, mPaint); 
     // kill this so we don't double draw 
     mPath.reset(); 
    } 

    @Override 
    public boolean onTouchEvent(MotionEvent event) { 
     float x = event.getX(); 
     float y = event.getY(); 

     switch (event.getAction()) { 
      case MotionEvent.ACTION_DOWN: 
       touch_start(x, y); 
       invalidate(); 
       break; 
      case MotionEvent.ACTION_MOVE: 
       touch_move(x, y); 
       invalidate(); 
       break; 
      case MotionEvent.ACTION_UP: 
       touch_up(); 
       invalidate(); 
       break; 
     } 
     return true; 
    } 

    public void clear(){ 
     mBitmap.eraseColor(Color.TRANSPARENT); 
     invalidate(); 
     System.gc(); 
    }} 

}

Bu

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:id="@+id/linearLayout" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:background="@drawable/ic_launcher" 
    > 

<Button 
    android:text="Button" 
    android:id="@+id/button1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"> 

</Button> 

<com.example.oncanvas 
    android:id="@+id/drawView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content">   

     </com.example.oncanvas> 
</LinearLayout> 

Answer 1

Onun sadece clue..Add kodunuzu Düzeni için XML

@Override 
    public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) { 
     super.draw(canvas, mapView, shadow);     

     // convert point to pixels 
     Point screenPts = new Point(); 
     mapView.getProjection().toPixels(pointToDraw, screenPts); 

     // add marker 
     Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.marker); 
     canvas.drawBitmap(bmp, screenPts.x, screenPts.y - 24, null); // 24 is the height of image  
     return true; 
    } 
} 

Answer 2

Mutti çizmek gerekiyorsa OnDraw() içinde ple imge aramanız gereken: canvas.drawBitmap() Farklı marj değerleri ile mutiple kez.

for(int i=0;i<4;i++){ 
    canvas.drawBitmap(bmp, (i*5), (i*10), null) 
}