I have created a new module to display,create,edit and delete records on (project.task) model using Odoo Mobile framework 

https://github.com/Odoo-mobile/framework

public class ProjectTask extends OModel {

    public static final String TAG = ProjectTask.class.getSimpleName();
    public static final String AUTHORITY = "com.odoo.addons.projects.project_tasks";

    OColumn name = new OColumn("Name", OVarchar.class).setSize(100);
    OColumn project_id = new OColumn("Project", ProjectProject.class, OColumn.RelationType.ManyToOne);
    OColumn description = new OColumn("Description", OText.class);

    public ProjectTask(Context context, OUser user) {
        super(context, "project.task", user);
        setHasMailChatter(true);
    }

    @Override
    public Uri uri() {
        return buildURI(AUTHORITY);
    }
}

and another model to view projects in the ManyToOne field (project_id)

public class ProjectProject extends OModel {
    public static final String TAG = ProjectProject.class.getSimpleName();

    OColumn name = new OColumn("Name", OVarchar.class).setSize(100);

    public ProjectProject(Context context, OUser user) {
        super(context, "project.project", user);
    }

}

and when i defined the editable field (project_id) in the layout i made sure to add app:widgetType="SearchableLive" 

in order to use the selection widget to select projects 

<odoo.controls.OField
    android:id="@+id/edit_project_id"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:controlLabel="Project"
    app:fieldName="project_id"
    app:fieldTextAppearance="?android:textAppearanceMedium"
    app:widgetType="SearchableLive"></odoo.controls.OField>

ut the field appears only as the integer id of the selected projected as shown in this screen shot ! 

https://drive.google.com/file/d/1RqAB_Z6TiOZ_OaY2FsKfvBKfwAhXI4ky/view?usp=sharing

how can i fix this code so that the project name appears in the form and when i click on this editable field it goes to a search view and select the desired project the same way as country_id in res.partner as shown in the following screen shots ??

https://drive.google.com/file/d/1llaOGHN8rCXZVBPZK5BP_4Ktjyh7QFVf/view?usp=sharing

and when i click on country this search view appears ?

https://drive.google.com/file/d/1PhUBHZMNlPv3i3ESeolj5PdD3l77iymZ/view?usp=sharing