Cómo arrastrar el TextView al destino correcto otro TextView

Intente el código siguiente, él debe trabajar según su descripción en la pregunta. He añadido una cosa extra, es decir, restablecer el botón como yo lo sentía necesario.

Picture_to_word_24_color.xml

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:padding="10dp" android:paddingLeft="50dp" android:paddingRight="50dp" > <TextView android:id="@+id/option_1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dp" android:background="@drawable/option" android:gravity="center" android:text="Apple" android:textStyle="bold" /> <TextView android:id="@+id/option_2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dp" android:background="@drawable/option" android:gravity="center" android:text="Orange" android:textStyle="bold" /> <TextView android:id="@+id/option_3" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dp" android:background="@drawable/option" android:gravity="center" android:text="Ball" android:textStyle="bold" /> <TextView android:id="@+id/choice_1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dp" android:background="@drawable/choice" android:gravity="center" android:text="A for " /> <TextView android:id="@+id/choice_2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dp" android:background="@drawable/choice" android:gravity="center" android:text="O for " /> <TextView android:id="@+id/choice_3" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dp" android:background="@drawable/choice" android:gravity="center" android:text="B for " /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Reset" android:onClick="reset"/> </LinearLayout> 

Picture_to_word_24_color.java

 package com.example.touchanddrag; import android.os.Build; import android.os.Bundle; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.app.Activity; import android.content.ClipData; import android.graphics.Typeface; import android.view.DragEvent; import android.view.Menu; import android.view.MotionEvent; import android.view.View; import android.view.View.DragShadowBuilder; import android.view.View.OnDragListener; import android.view.View.OnTouchListener; import android.widget.TextView; import android.widget.Toast; @SuppressLint("NewApi") public class Picture_to_word_24_color extends Activity { private TextView option1, option2, option3, choice1, choice2, choice3; public CharSequence dragData; @TargetApi(Build.VERSION_CODES.HONEYCOMB) @SuppressLint("NewApi") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.picture_to_word_24_color); //get both sets of text views //views to drag option1 = (TextView)findViewById(R.id.option_1); option2 = (TextView)findViewById(R.id.option_2); option3 = (TextView)findViewById(R.id.option_3); //views to drop onto choice1 = (TextView)findViewById(R.id.choice_1); choice2 = (TextView)findViewById(R.id.choice_2); choice3 = (TextView)findViewById(R.id.choice_3); //set touch listeners option1.setOnTouchListener(new ChoiceTouchListener()); option2.setOnTouchListener(new ChoiceTouchListener()); option3.setOnTouchListener(new ChoiceTouchListener()); //set drag listeners choice1.setOnDragListener(new ChoiceDragListener()); choice2.setOnDragListener(new ChoiceDragListener()); choice3.setOnDragListener(new ChoiceDragListener()); } /** * ChoiceTouchListener will handle touch events on draggable views * */ private final class ChoiceTouchListener implements OnTouchListener { @SuppressLint("NewApi") @Override public boolean onTouch(View view, MotionEvent motionEvent) { if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) { /* * Drag details: we only need default behavior * - clip data could be set to pass data as part of drag * - shadow can be tailored */ ClipData data = ClipData.newPlainText("", ""); DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view); //start dragging the item touched view.startDrag(data, shadowBuilder, view, 0); return true; } else { return false; } } } /** * DragListener will handle dragged views being dropped on the drop area * - only the drop action will have processing added to it as we are not * - amending the default behavior for other parts of the drag process * */ @SuppressLint("NewApi") private class ChoiceDragListener implements OnDragListener { @Override public boolean onDrag(View v, DragEvent event) { switch (event.getAction()) { case DragEvent.ACTION_DRAG_STARTED: //no action necessary break; case DragEvent.ACTION_DRAG_ENTERED: //no action necessary break; case DragEvent.ACTION_DRAG_EXITED: //no action necessary break; case DragEvent.ACTION_DROP: //handle the dragged view being dropped over a drop view View view = (View) event.getLocalState(); //view dragged item is being dropped on TextView dropTarget = (TextView) v; //view being dragged and dropped TextView dropped = (TextView) view; //checking whether first character of dropTarget equals first character of dropped if(dropTarget.getText().toString().charAt(0) == dropped.getText().toString().charAt(0)) { //stop displaying the view where it was before it was dragged view.setVisibility(View.INVISIBLE); //update the text in the target view to reflect the data being dropped dropTarget.setText(dropTarget.getText().toString() + dropped.getText().toString()); //make it bold to highlight the fact that an item has been dropped dropTarget.setTypeface(Typeface.DEFAULT_BOLD); //if an item has already been dropped here, there will be a tag Object tag = dropTarget.getTag(); //if there is already an item here, set it back visible in its original place if(tag!=null) { //the tag is the view id already dropped here int existingID = (Integer)tag; //set the original view visible again findViewById(existingID).setVisibility(View.VISIBLE); } //set the tag in the target view being dropped on - to the ID of the view being dropped dropTarget.setTag(dropped.getId()); //remove setOnDragListener by setting OnDragListener to null, so that no further drag & dropping on this TextView can be done dropTarget.setOnDragListener(null); } else //displays message if first character of dropTarget is not equal to first character of dropped Toast.makeText(Picture_to_word_24_color.this, dropTarget.getText().toString() + "is not " + dropped.getText().toString(), Toast.LENGTH_LONG).show(); break; case DragEvent.ACTION_DRAG_ENDED: //no action necessary break; default: break; } return true; } } public void reset(View view) { option1.setVisibility(TextView.VISIBLE); option2.setVisibility(TextView.VISIBLE); option3.setVisibility(TextView.VISIBLE); choice1.setText("A for "); choice2.setText("O for "); choice3.setText("B for "); choice1.setTag(null); choice2.setTag(null); choice3.setTag(null); choice1.setTypeface(Typeface.DEFAULT); choice2.setTypeface(Typeface.DEFAULT); choice3.setTypeface(Typeface.DEFAULT); choice1.setOnDragListener(new ChoiceDragListener()); choice2.setOnDragListener(new ChoiceDragListener()); choice3.setOnDragListener(new ChoiceDragListener()); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.picture_to_word_24_color, menu); return true; } } 

No olvide comprobar el nivel de API objetivo. Como tuve que añadir @SuppressLint("NewApi")