Android Drag and Drop Example
Hi Friends, Welcome to UandBlog.com again . Today I am going to discuss with Android Drag and Drop tutorial. Android drag/drop framework allows users to move data from one View to another in the current layout using a graphical drag and drop gesture. Drag and drop gesture is used across several android applications, especially in android games. When you start drag , you include both the data you are moving and metadata describing this data as part of the call to the system . let’s get started with the tutorial.
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Prerequisites:
- JDK 7.0 or Above
- Android Studio 2.0
Steps to Follow:
Step 2: Select minimum API level 16 so that it can support maximum of Android Device available in the google play.
Step 3: Select Blank Activity and Give your layout xml name is activity_main and click finish.
Step 4: Inside activity_main.xml configure two Linearlayout with a button to drag and drop like below.
<LinearLayout 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:orientation="vertical"
android:gravity="center"
tools:context=".MainActivity" >
<LinearLayout
android:id="@+id/bottomlinear"
android:layout_width="match_parent"
android:layout_height="400px"
android:gravity="center"
android:background="#E9967a"
android:orientation="vertical" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/one"
android:textSize="30sp"
android:text="Drag it" />
</LinearLayout>
<LinearLayout
android:id="@+id/bottomlinear1"
android:layout_width="match_parent"
android:layout_height="400px"
android:gravity="center"
android:background="#00CED1"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/drop"
android:textSize="30sp"
android:text="Drop Here" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/Total"
android:textSize="20sp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/Sucess"
android:textSize="20sp" />
</LinearLayout>
</LinearLayout>
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
tools:context=".MainActivity" >
<LinearLayout
android:id="@+id/bottomlinear"
android:layout_width="match_parent"
android:layout_height="400px"
android:gravity="center"
android:background="#E9967a"
android:orientation="vertical" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/one"
android:textSize="30sp"
android:text="Drag it" />
</LinearLayout>
<LinearLayout
android:id="@+id/bottomlinear1"
android:layout_width="match_parent"
android:layout_height="400px"
android:gravity="center"
android:background="#00CED1"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/drop"
android:textSize="30sp"
android:text="Drop Here" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/Total"
android:textSize="20sp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/Sucess"
android:textSize="20sp" />
</LinearLayout>
</LinearLayout>
Step 5: Inside MainActivity.java write the following code.
public class MainActivity extends AppCompatActivity {
Button dragbutton;
LinearLayout dropbutton;
TextView tv,sucess;
int total,fail = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dragbutton = (Button) findViewById(R.id.one);
dropbutton = (LinearLayout) findViewById(R.id.bottomlinear);
tv = (TextView) findViewById(R.id.Total);
sucess = (TextView) findViewById(R.id.Sucess);
dropbutton.setOnDragListener(new View.OnDragListener(){
@Override
public boolean onDrag(View v, DragEvent event) {
// TODO Auto-generated method stub
final int action = event.getAction();
switch (action){
case DragEvent.ACTION_DRAG_STARTED:
// Executed after startDrag() is called.
break;
case DragEvent.ACTION_DRAG_EXITED:
break;
case DragEvent.ACTION_DRAG_ENTERED:
// Executed after the Drag Shadow enters the drop area
break;
case DragEvent.ACTION_DROP: {
//Executed when user drops the data
fail = fail + 1;
return (true);
}
case DragEvent.ACTION_DRAG_ENDED: {
total = total + 1;
int value = total - fail;
sucess.setText("Sucessful Drops:" + value);
tv.setText("Total Drops: " + total);
return (true);
}
default:
break;
}
return true;
}
});
dragbutton.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent arg1) {
// TODO Auto-generated method stub
ClipData data = ClipData.newPlainText("", "");
View.DragShadowBuilder shadow = new View.DragShadowBuilder(dragbutton);
v.startDrag(data, shadow, null, 0);
return false;
}
});
}
}
Now run the application and your sequence of output will be like below.Button dragbutton;
LinearLayout dropbutton;
TextView tv,sucess;
int total,fail = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dragbutton = (Button) findViewById(R.id.one);
dropbutton = (LinearLayout) findViewById(R.id.bottomlinear);
tv = (TextView) findViewById(R.id.Total);
sucess = (TextView) findViewById(R.id.Sucess);
dropbutton.setOnDragListener(new View.OnDragListener(){
@Override
public boolean onDrag(View v, DragEvent event) {
// TODO Auto-generated method stub
final int action = event.getAction();
switch (action){
case DragEvent.ACTION_DRAG_STARTED:
// Executed after startDrag() is called.
break;
case DragEvent.ACTION_DRAG_EXITED:
break;
case DragEvent.ACTION_DRAG_ENTERED:
// Executed after the Drag Shadow enters the drop area
break;
case DragEvent.ACTION_DROP: {
//Executed when user drops the data
fail = fail + 1;
return (true);
}
case DragEvent.ACTION_DRAG_ENDED: {
total = total + 1;
int value = total - fail;
sucess.setText("Sucessful Drops:" + value);
tv.setText("Total Drops: " + total);
return (true);
}
default:
break;
}
return true;
}
});
dragbutton.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent arg1) {
// TODO Auto-generated method stub
ClipData data = ClipData.newPlainText("", "");
View.DragShadowBuilder shadow = new View.DragShadowBuilder(dragbutton);
v.startDrag(data, shadow, null, 0);
return false;
}
});
}
}
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