Databases
StackOverflow2013
Postsdbo
POdraw polygon and and make it editable using android .....
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POdraw polygon and and make it editable using android .....
    primarykey
    data
    text
    <p>Actually i am doing image editing in android and using canvas ... but i don't know ....</p> <ol> <li>how to work with canvas and UI together..??</li> <li>how use buttons and other widgets with canvas...??</li> <li>how to make polygon editable .. so that if i touch any point then it hould highlight and i can resize the polygon.</li> </ol> <p>There is my code:</p> <pre><code>public class Crop_Image_Activity1 extends Activity implements OnClickListener { static int count=0,i=0,j=0; ImageView img1; Button bt1,bt2; Path path=new Path(); Paint mPaint; float x_current,y_current; float x0,y0; float x1,y1; float pointx[]=new float[20]; float pointy[]=new float[20]; String num; MyView view1; ViewGroup.LayoutParams params; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_crop__image__activity1); img1=(ImageView)findViewById(R.id.imageView1); bt1=(Button)findViewById(R.id.button1); bt2=(Button)findViewById(R.id.button2); //img1.setImageResource(R.drawable.pic1); this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN); mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setDither(true); mPaint.setColor(0xFFFF0000); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeJoin(Paint.Join.ROUND); mPaint.setStrokeCap(Paint.Cap.ROUND); mPaint.setStrokeWidth(1); view1=new MyView(this); params =new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT); addContentView(view1, params); // bt1.setOnClickListener(this); // bt2.setOnClickListener(this); } public class MyView extends View implements android.view.GestureDetector.OnGestureListener{ private Bitmap mBitmap; private Canvas mCanvas; private Path mPath; private Paint mBitmapPaint; private GestureDetector gestureScanner; public MyView(Context c) { super(c); mPath = new Path(); mBitmapPaint = new Paint(Paint.DITHER_FLAG); gestureScanner=new GestureDetector(this); } @Override 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); } @SuppressLint("DrawAllocation") @Override protected void onDraw(Canvas canvas) { canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint); canvas.drawPath(mPath, mPaint); } @Override public boolean onTouchEvent(MotionEvent event) { return gestureScanner.onTouchEvent(event); } public boolean onDown(MotionEvent arg0) { x1=arg0.getX(); y1=arg0.getY(); if(count==-1) { mPath.reset(); mPath.moveTo(pointx[j],pointy[j]); } else if(count==0)//// storing initial points { mPath.moveTo(x1, y1); mCanvas.drawCircle(x1,y1,10, mPaint); x0=x1; y0=y1; pointx[i]=x1; /// storing all points in array pointy[i]=y1; } else if(count&gt;0) { mPath.moveTo(x_current,y_current); mCanvas.drawCircle(x_current,y_current,10, mPaint); } count++; invalidate(); return true; } @Override public boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2,float arg3) { x_current=arg1.getX(); y_current=arg1.getY(); i++; pointx[i]=x_current; pointy[i]=y_current; mPath.lineTo(x_current,y_current); mCanvas.drawPath(mPath, mPaint); invalidate(); return true; } public boolean onSingleTapUp(MotionEvent e) { mPath.moveTo(x_current,y_current); mPath.lineTo(x0,y0); mCanvas.drawPath(mPath, mPaint); invalidate(); return true; } public boolean onDoubleTapUp(MotionEvent e) { return false; } public void onLongPress(MotionEvent e) { for(j=0;j&lt;=i;j++) { if((e.getX()&gt;pointx[j]-20 &amp;&amp; e.getX()&lt;pointx[j]+20) &amp;&amp; (e.getY()&gt;pointy[j]-20 &amp;&amp; e.getY()&lt;pointy[j]+20)) { mPaint.setColor(Color.BLUE); mCanvas.drawCircle(pointx[j],pointy[j],20, mPaint); count=-1; invalidate(); mPaint.setColor(0xFFFF0000); break; } } } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2,float distanceX, float distanceY) { return false; } @Override public void onShowPress(MotionEvent e) { } } public void onClick(View view) { switch(view.getId()) { case R.id.button1: break; case R.id.button2: // Intent intent1=new Intent(); // startActivity(intent1); break; } } public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_crop__image__activity1, menu); return true; } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USfedorqui
    1. USuser2068578
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POdraw polygon and and make it editable using android .....
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload