In the below example I have created draggable panel function. This will works like a notification bar up and down. Here first I have added slidinguppanel support library in build.gradle file. Then in next step i have added SlidingUpPanelLayout, Button, TextView, ImageView in the activity_main.xml layout. And last step In MainActivity I have used setPanelSlideListener method. You can see below program it will clearly describe you How to create draggable image in android.

Step(1)-I have added  first  slidinguppanel support library in build.gradle  file -
 

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    repositories {
        mavenCentral()
    }
    compile 'com.sothree.slidinguppanel:library:3.0.0'

}

Step(2)activity.main.xml-
 

<RelativeLayout 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"
    tools:context=".MainActivity">

    <com.sothree.slidinguppanel.SlidingUpPanelLayout xmlns:sothree="http://schemas.android.com/apk/res-auto"
        android:id="@+id/sliding_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="bottom"
        sothree:umanoDragView="@+id/dragView"
        sothree:umanoOverlay="true"
        sothree:umanoPanelHeight="68dp"
        sothree:umanoParalaxOffset="100dp"
        sothree:umanoShadowHeight="4dp">

        <!-- MAIN CONTENT -->
        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TextView
                android:id="@+id/text"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:clickable="true"
                android:focusable="false"
                android:text="Welcome"
                android:focusableInTouchMode="false"
                android:gravity="center"
                android:textSize="20sp" />

            <Button
                android:id="@+id/btn_show"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/text"
                android:layout_centerInParent="true"
                android:layout_marginRight="15dp"
                android:layout_marginLeft="15dp"
                android:text="Show"
                android:visibility="gone" />
        </RelativeLayout>

        <!-- SLIDING LAYOUT -->
        <LinearLayout
            android:id="@+id/dragView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#ffffff"
            android:clickable="true"
            android:focusable="false"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <TextView
                    android:id="@+id/name"
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:textColor="@android:color/holo_green_dark"
                    android:gravity="center_vertical"
                    android:paddingLeft="10dp"
                    android:text="slide"
                    android:textSize="14sp" />

                <Button
                    android:id="@+id/btn_hide"
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:gravity="center_vertical|right"
                    android:paddingLeft="10dp"
                    android:paddingRight="10dp"
                    android:text="Hide"
                    android:textSize="14sp" />

            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="#FFCCCC">

                <ImageView
                    android:layout_width="300dp"
                    android:layout_height="200dp"
                    android:layout_margin="10dp"
                    android:layout_weight="1"
                    android:src="@drawable/one" />
            </LinearLayout>
        </LinearLayout>
    </com.sothree.slidinguppanel.SlidingUpPanelLayout>

</RelativeLayout>

Step(3)-MainActivity-
  

  public class MainActivity extends Activity {
    private SlidingUpPanelLayout slidingLayout;
    private Button btnShow;
    private Button btnHide;
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btnShow = (Button)findViewById(R.id.btn_show);
        btnHide = (Button)findViewById(R.id.btn_hide);
        textView = (TextView)findViewById(R.id.text);

        slidingLayout = (SlidingUpPanelLayout)findViewById(R.id.sliding_layout);
        
        slidingLayout.setPanelSlideListener(onSlideListener());
        btnHide.setOnClickListener(onHideListener());
        btnShow.setOnClickListener(onShowListener());
    }

    private View.OnClickListener onShowListener() {
        return new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //show sliding layout in bottom of screen (not expand it)
                slidingLayout.setPanelState(SlidingUpPanelLayout.PanelState.COLLAPSED);
                btnShow.setVisibility(View.GONE);
            }
        };
    }

    /**
     * Hide sliding layout when click button
     * @return
     */
    private View.OnClickListener onHideListener() {
        return new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //hide sliding layout
                slidingLayout.setPanelState(SlidingUpPanelLayout.PanelState.HIDDEN);
                btnShow.setVisibility(View.VISIBLE);
            }
        };
    }

    private SlidingUpPanelLayout.PanelSlideListener onSlideListener() {
        return new SlidingUpPanelLayout.PanelSlideListener() {
            @Override
            public void onPanelSlide(View view, float v) {
                textView.setText("panel is sliding");
            }

            @Override
            public void onPanelCollapsed(View view) {
                textView.setText("panel Collapse");
            }

            @Override
            public void onPanelExpanded(View view) {
                textView.setText("panel expand");
            }

            @Override
            public void onPanelAnchored(View view) {
                textView.setText("panel anchored");
            }

            @Override
            public void onPanelHidden(View view) {
                textView.setText("panel is Hidden");
            }
        };
    }
}