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POOne view exclude another when a drop occurs
 

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  1. POOne view exclude another when a drop occurs
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    <p>I've been struggling on the last couple of days with this program. The issue that I'm facing is about a drop event of a view which excludes another view. What the program is supposed to do is, on a click of a button, creates as many ImageButtons and they all can be dragged and dropped anywhere on the screen. However, he creates the first view and creates the second, but when I drag the second ImageButton, the first one created is deleted from the screen.</p> <p>Here is the XML</p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/relative_main" tools:context=".WhyItActivity" &gt; &lt;Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="add button" android:onClick="addButton" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>Below is the java activity responsible</p> <pre><code>public class WhyItActivity extends Activity { private RelativeLayout relative; private LayoutParams params; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_why_it); params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); relative = (RelativeLayout)findViewById(R.id.relative_main); // all the screen be a dropping area relative.setOnDragListener(new View.OnDragListener() { @Override public boolean onDrag(View view, DragEvent event) { View dragView = (View) event.getLocalState(); RelativeLayout layout = (RelativeLayout) view; switch (event.getAction()) { case DragEvent.ACTION_DRAG_STARTED: break; case DragEvent.ACTION_DRAG_ENTERED: break; case DragEvent.ACTION_DRAG_EXITED: break; case DragEvent.ACTION_DROP: int right = (int)event.getX(); int top = (int)event.getY(); params.setMargins(right, top, 0, 0); layout.removeView(dragView); layout.addView(dragView, params); // set back the visibility dragView.setVisibility(View.VISIBLE); break; case DragEvent.ACTION_DRAG_ENDED: break; default: break; } return true; } }); } /** OnClick */ public void addButton(View v){ // params for centralizing the image button LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); params.addRule(RelativeLayout.CENTER_IN_PARENT); // new object ImageButton imgBtn = new ImageButton(this); imgBtn.setImageDrawable(getResources().getDrawable(R.drawable.ic_launcher)); relative.addView(imgBtn, params); // letting the view be dragged around the screen imgBtn.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View view) { ClipData data = ClipData.newPlainText("", ""); DragShadowBuilder builder = new View.DragShadowBuilder(view); view.startDrag(data, builder, view, 0); // let the view be invisible while dragging the object view.setVisibility(View.INVISIBLE); return true; } }); } </code></pre> <p>So, the question is... Where I'm screwing? I create a new object, if it's was a matter of just one view on the screen it would be working just fine.</p> <p>Thanks for reading so far, and possibly be able to help.</p>
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    1. USRigotti
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    1. COIt seems all your new views are stacking on previous ones.
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      1. POOne view exclude another when a drop occurs
      1. USAvinazz
    2. COMan, you're pretty right!! The views are not being deleted, they're being stacked. But, I still can't understand why :(
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      1. USRigotti
    3. COThere you are, i've posted the answer :)
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      1. USAvinazz
 

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