Drag drop view android

We can drag view to anywhere on screen, now we want drag view to certain position.

Create file keo.xml in folder layout like this.

<?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="50dp"

android:layout_margin="5dp"

android:background="#00ffff"

android:gravity="center"

android:text="Apple"

android:textStyle="bold" />

<TextView

android:id="@+id/option_2"

android:layout_width="fill_parent"

android:layout_height="50dp"

android:layout_margin="5dp"

android:background="#0000ff"

android:gravity="center"

android:text="Orange"

android:textStyle="bold" />

<TextView

android:id="@+id/option_3"

android:layout_width="fill_parent"

android:layout_height="50dp"

android:layout_margin="5dp"

android:background="#008000"

android:gravity="center"

android:text="Ball"

android:textStyle="bold" />

<TextView

android:id="@+id/choice_1"

android:layout_width="fill_parent"

android:layout_height="50dp"

android:layout_margin="5dp"

android:background="#00ffff"

android:gravity="center"

android:text="A for " />

<TextView

android:id="@+id/choice_2"

android:layout_width="fill_parent"

android:layout_height="50dp"

android:layout_margin="5dp"

android:background="#00ffff"

android:gravity="center"

android:text="O for " />

<TextView

android:id="@+id/choice_3"

android:layout_width="fill_parent"

android:layout_height="50dp"

android:layout_margin="5dp"

android:background="#00ffff"

android:gravity="center"

android:text="B for " />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:text="Reset"

android:onClick="reset"/>

</LinearLayout>

Class control like this.

public class keoview 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.keo);

    //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());

}

private final class ChoiceTouchListener implements OnTouchListener {

    @SuppressLint("NewApi")

    @Override

    public boolean onTouch(View view, MotionEvent motionEvent) {

        if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {

            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;

        }

    }

}

@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:

            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(keo3.this, dropTarget.getText().toString() + "is not " + dropped.getText().toString(), Toast.LENGTH_LONG).show();

            break;

        case DragEvent.ACTION_DRAG_ENDED:

            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());

}

}

This way can use to make game.