NewGroupActivity.java

package com.apigee.sample.usersandgroups;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

import com.apigee.sdk.data.client.ApigeeDataClient;
import com.apigee.sdk.data.client.callbacks.ApiResponseCallback;
import com.apigee.sdk.data.client.entities.Entity;
import com.apigee.sdk.data.client.response.ApiResponse;

import java.util.List;

/**
 * Activity behind the UI to add a new group.
 * 
 * UI for this activity is defined in 
 * res/layout/activity_new_group.xml
 */
public class NewGroupActivity extends Activity {

	String logCategory = "NewGroup";
	private UsersAndGroupsApplication usersGroupsApp = null;

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

	/**
	 * Create a new user group using data from widgets in the UI 
	 * for this activity.
	 * 
	 * @param view Data about the button's context.
	 */
	public void createGroup(View view){
		// Get the Apigee data client for interacting with the application.
		UsersAndGroupsApplication userGroupsApp = 
				(UsersAndGroupsApplication) getApplication();
		final ApigeeDataClient dataClient = userGroupsApp.getDataClient();
		
		if (dataClient != null) {
			
			// Handles on widgets in the UI.
			EditText textGroupTitle = (EditText)findViewById(R.id.groupTitle);
			final String groupTitle = textGroupTitle.getText().toString();		
			EditText textGroupPath = (EditText)findViewById(R.id.groupPath);
			final String groupPath = textGroupPath.getText().toString();
			final TextView groupTitleErrorMessage = 
					(TextView)findViewById(R.id.textGroupTitleError);


			// A query statement with which to check for an existing group
			// with the same path (which must be unique).
			String queryText = "path='" + groupPath + "'";

			// Call the DataClient method to find out if there's already
			// a group with the path value the user entered. If not, add the
			// group.
            dataClient.getEntitiesAsync("groups",queryText,new ApiResponseCallback() {
                @Override
                public void onResponse(ApiResponse response) {
                    if (response != null) {
                        // Get the list of groups returned by the query.
                        List<Entity> groups = response.getEntities();
                        // If there are any groups returned, it means
                        // there's one with the same path. So display a message.
                        if (groups.size() > 0){
                            groupTitleErrorMessage.setText("The group path \'" + groupPath +
                                    "\' is unavailable");
                            return;
                            // If there aren't any potential path conflicts, go ahead and
                            // create the group.
                        } else {
                            // Create a new group with data entered.
                            dataClient.createGroupAsync(groupPath,
                                    groupTitle, new ApiResponseCallback(){

                                        @Override
                                        public void onException(Exception ex) {
                                            Log.i("NewGroup", ex.getMessage());
                                        }

                                        // Called to receive the response from the
                                        // attempt to create a group.
                                        @Override
                                        public void onResponse(ApiResponse response) {
                                            finish();
                                        }
                                    });
                        }
                        // The response might be null for various reasons, including
                        // an improperly initialized ApigeeClient or permissions on the
                        // server-side application that are too restrictive.
                    } else {
                        String message = "API response was null. ";
                        usersGroupsApp.showErrorMessage(message);
                        Log.d(logCategory, message.toString());
                    }
                }

                @Override
                public void onException(Exception e) {
                    if (e != null){
                        System.out.println(e.getLocalizedMessage());
                    }
                }
            });
		} else {
			String message = "Data client was null. ";
			usersGroupsApp.showErrorMessage(message);							
			Log.d(logCategory, message.toString());							
		}
		
	}
	
	/**
	 * Called to support click events in the menu.
	 */
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
    	switch(item.getItemId()) { 
    	case R.id.action_list_users:
    		displayGroupList();
    		return true;
    	case R.id.action_go_home:
    		goHome();
    		return true;
    	default:
    		return false;
    	}
    }
    
    /**
     * Handles the menu item to view groups.
     */
    public void displayGroupList(){
    	Intent intent = new Intent(this, GroupsListViewActivity.class);
    	this.startActivity(intent);
    }
    
    /**
     * Handles the menu item to go the home page.
     */
    public void goHome(){
    	Intent intent = new Intent(this, UsersAndGroupsHomeActivity.class);
    	this.startActivity(intent);
    }

    /**
     * Initializes the menu.
     */
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.new_group, menu);
		return true;
	}

}