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POHow can i drag and drop multiple imageviews over other imageviews android
 

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  1. POHow can i drag and drop multiple imageviews over other imageviews android
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    <p>I am new to Android. The present code can drag and drop multiple Image Views on a single ImageView but I am not able to drop them on multiple Image Views. Kindly help as in how can I modify my code or any other existing code.</p> <p>MainActivity.java</p> <pre><code>package n.f.letters; import android.app.Activity; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.view.Window; import android.view.WindowManager; import android.widget.ImageView; import android.widget.RelativeLayout; public class MainActivity extends Activity implements OnTouchListener { /** Called when the activity is first created. */ private View selected_item = null; private int offset_x = 0; private int offset_y = 0; Boolean touchFlag=false; boolean dropFlag=false; LayoutParams imageParams; ImageView imageDrop,image1,image2,image3,image4; int crashX,crashY; Drawable dropDrawable,selectDrawable; Rect dropRect,selectRect; int topy,leftX,rightX,bottomY; int dropArray[]; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.requestWindowFeature(Window.FEATURE_NO_TITLE); this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.activity_main); ViewGroup container = (ViewGroup) findViewById(R.id.container); imageDrop=(ImageView) findViewById(R.id.ImgDrop); image1=(ImageView) findViewById(R.id.img1); image2=(ImageView) findViewById(R.id.img2); image3=(ImageView) findViewById(R.id.img3); image4=(ImageView) findViewById(R.id.img4); container.setOnTouchListener(new View.OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { if(touchFlag==true) { switch (event.getActionMasked()) { case MotionEvent.ACTION_DOWN : topy=imageDrop.getTop(); leftX=imageDrop.getLeft(); rightX=imageDrop.getRight(); bottomY=imageDrop.getBottom(); //opRect. break; case MotionEvent.ACTION_MOVE: crashX=(int) event.getX(); crashY=(int) event.getY(); int x = (int) event.getX() - offset_x; int y = (int) event.getY()- offset_y; int w = getWindowManager().getDefaultDisplay().getWidth() - 50; int h = getWindowManager().getDefaultDisplay().getHeight() - 10; if (x &gt; w) x = w; if (y &gt; h) y = h; RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(new ViewGroup.MarginLayoutParams( RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT)); lp.setMargins(x, y, 0, 0); //Drop Image Here if(crashX &gt; leftX &amp;&amp; crashX &lt; rightX &amp;&amp; crashY &gt; topy &amp;&amp; crashY &lt; bottomY ) { Drawable temp=selected_item.getBackground(); imageDrop.setBackgroundDrawable(temp); imageDrop.bringToFront(); dropFlag=true; selected_item.setVisibility(View.INVISIBLE); } //Drop Image Here selected_item.setLayoutParams(lp); break; case MotionEvent.ACTION_UP: // touchFlag=false; if(dropFlag==true) { dropFlag=false; } else { selected_item.setLayoutParams(imageParams); } break; default: break; } }else { System.err.println("Display Else Part ::-&gt;"+touchFlag); } return true; } }); image1.setOnTouchListener(this); image2.setOnTouchListener(this); image3.setOnTouchListener(this); image4.setOnTouchListener(this); } public boolean onTouch(View v, MotionEvent event) { switch (event.getActionMasked()) { case MotionEvent.ACTION_DOWN: touchFlag=true; offset_x = (int) event.getX(); offset_y = (int) event.getY(); selected_item = v; imageParams=v.getLayoutParams(); break; case MotionEvent.ACTION_UP: selected_item=null; touchFlag=false; break; default: break; } return false; } } </code></pre> <p>activity_main.xml</p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/container" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" &gt; &lt;ImageView android:id="@+id/ImgDrop" android:layout_width="60dp" android:layout_height="60dp" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:background="#FFF123" /&gt; &lt;ImageView android:id="@+id/img4" android:layout_width="60dp" android:layout_height="60dp" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:layout_marginRight="75dp" android:layout_marginTop="61dp" android:background="@drawable/ic_launcher" /&gt; &lt;ImageView android:id="@+id/img3" android:layout_width="60dp" android:layout_height="60dp" android:layout_alignTop="@+id/img4" android:layout_toRightOf="@+id/ImgDrop" android:background="@drawable/ic_launcher" /&gt; &lt;ImageView android:id="@+id/img2" android:layout_width="60dp" android:layout_height="60dp" android:layout_alignRight="@+id/ImgDrop" android:layout_alignTop="@+id/img3" android:layout_marginRight="23dp" android:background="@drawable/ic_launcher" /&gt; &lt;ImageView android:id="@+id/img1" android:layout_width="60dp" android:layout_height="60dp" android:layout_alignTop="@+id/img2" android:layout_marginRight="40dp" android:layout_toLeftOf="@+id/img2" android:background="@drawable/ic_launcher" /&gt; </code></pre> <p></p>
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