//Application
package com.tutorial.Alert;

import android.app.Application;

import com.parse.Parse;
import com.parse.ParseACL;
import com.parse.ParseInstallation;
import com.parse.ParseObject;
import com.parse.ParseUser;

public class SampleApplication extends Application {
	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		ParseObject.registerSubclass(Alert.class);
		Parse.initialize(this, "ABC", "XYZ");
		ParseInstallation.getCurrentInstallation().saveInBackground();
		ParseUser.enableAutomaticUser();
		ParseACL defaultACL = new ParseACL();
		ParseACL.setDefaultACL(defaultACL, true);	
	}

}

//Subclass 
package com.tutorial.Alert;

import com.parse.ParseClassName;
import com.parse.ParseObject;
import com.parse.ParseQuery;

@ParseClassName("Alert")
public class Alert extends ParseObject {
	public String getTitle()
	{
		return getString("title");
	}
	
	public String getCategory()
	{
		return getString("category");
	}
	public String getDescription()
	{
		return getString("description");
	}
	
	public static ParseQuery<Alert> getQuery() {
		return ParseQuery.getQuery(Alert.class);
	}

}

//MainActivity where you retrieve data
package com.tutorial.Alert;

import java.util.List;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;

import com.parse.CountCallback;
import com.parse.FindCallback;
import com.parse.ParseException;
import com.parse.ParseQuery;


public class MainActivity extends ActionBarActivity {
	public static final String TAG = "AlertMainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    
    @Override
    protected void onResume() {
    	// TODO Auto-generated method stub
    	super.onResume();
    	
    	ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo ni = cm.getActiveNetworkInfo();
		if ((ni != null) && (ni.isConnected())) {
			ParseQuery<Alert> query = Alert.getQuery();
	    	query.whereEqualTo("category", "Serious");
	    	Log.d(TAG,"before calling query");
	    	query.findInBackground(new FindCallback<Alert>() {
	    		public void done(List<Alert> list, ParseException exp) 
	    		{
	    			if(exp == null){
	    				for(int i=0;i<list.size();i++)
	    				{
	    					Alert alert = list.get(i);
	    					Log.d(TAG, "Title = "+ alert.getTitle() + " desc = "+ alert.getDescription());
	    				}
	    				
	    			} else {
	    				Log.d(TAG,"no results !!"+ exp.getMessage()+" code ="+ exp.getCode());
	    			}
	    		};
	    	
	    	});
		} else{
			if(null == ni)
				Log.d(TAG, "ni is null");
			if(!ni.isConnected())
				Log.d(TAG,"network is not connected");
		}
    	
    	
    }

}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://s...content-available-to-author-only...d.com/apk/res/android"
    package="com.tutorial.Alert"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="9"
        android:targetSdkVersion="21" />
    <uses-permission android:name="android.permission.INTERNET" />
	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
	<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
	<uses-permission android:name="android.permission.VIBRATE" />
	<uses-permission android:name="android.permission.WAKE_LOCK" />
	<uses-permission android:name="android.permission.GET_ACCOUNTS" />
	<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
	
	<permission android:name="com.tutorial.Alert.permission.C2D_MESSAGE"
		android:protectionLevel="signature" />
	<uses-permission android:name="com.tutorial.Alert.permission.C2D_MESSAGE" />

    <application
        android:name="com.tutorial.Alert.SampleApplication"
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
        <service android:name="com.parse.PushService" />
		<receiver android:name="com.parse.ParseBroadcastReceiver">
			<intent-filter>
				<action android:name="android.intent.action.BOOT_COMPLETED" />
				<action android:name="android.intent.action.USER_PRESENT" />
			</intent-filter>
		</receiver>
		<receiver android:name="com.parse.GcmBroadcastReceiver"
			android:permission="com.google.android.c2dm.permission.SEND">
			<intent-filter>
				<action android:name="com.google.android.c2dm.intent.RECEIVE" />
				<action android:name="com.google.android.c2dm.intent.REGISTRATION" />

				<!--
				  IMPORTANT: If you change the package name of this sample app,
				  change "com.parse.tutorials.pushnotifications" in the lines
				  below to match the new package name.
				-->
				<category android:name="com.tutorial.Alert" />
			</intent-filter>
		</receiver>
    </application>

</manifest>