I have the complete code that I have.
The code below can drag and drop very smoothly, but it doesn't work like what I need, like the description below.
- Drag and Drop Data (Apple, Orage, Ball)
- Disable target location (A for, O for, B for)
So, if you drag “Apple” to “A for”, it will be CORRECT and update the text to “A for Apple”, and the text “Apple” will be hidden when dragging ... but if we drag the “Apple” drop to “O for "or" B for "this will fail, because" O for Orange "and" B for Ball ".
According to the code below, what should I add.
Markup:
<?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="wrap_content" 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 " /> </LinearLayout>
Acvitity:
public class picture_to_word_24_color extends Activity { //text views being dragged and dropped onto private TextView option1, option2, option3, choice1, choice2, choice3; public CharSequence dragData; @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") 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 Toast.makeText(picture_to_word_24_color.this, "ACTION_DRAG_ENTERED", Toast.LENGTH_SHORT).show(); break; case DragEvent.ACTION_DRAG_EXITED: //no action necessary Toast.makeText(picture_to_word_24_color.this, "ACTION_DRAG_EXITED", Toast.LENGTH_SHORT).show(); break; case DragEvent.ACTION_DROP: Toast.makeText(picture_to_word_24_color.this, "ACTION_DROP", Toast.LENGTH_SHORT).show(); //handle the dragged view being dropped over a drop view View view = (View) event.getLocalState(); //stop displaying the view where it was before it was dragged view.setVisibility(View.INVISIBLE); //view dragged item is being dropped on TextView dropTarget = (TextView) v; //view being dragged and dropped TextView dropped = (TextView) view; //update the text in the target view to reflect the data being dropped dropTarget.setText(dropped.getText()); //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()); break; case DragEvent.ACTION_DRAG_ENDED: //no action necessary Toast.makeText(picture_to_word_24_color.this, "ACTION_DRAG_ENDED", Toast.LENGTH_SHORT).show(); break; default: break; } return true; } } }
user1731690
source share