thoerup/checkupdates/CheckUpdates.java

package dk.thoerup.checkupdates;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.DialogInterface.OnClickListener;
import android.content.SharedPreferences.Editor;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.AsyncTask;
import android.util.Log;

public class CheckUpdates {
        final static long TIMESPAN_DAY = 24*60*60*1000; // one day
        final static String CHECKUPDATES = "CheckUpdates";
        final static String LASTCHECK = "lastcheck";
        
        int versionCode;
        String versionName;
        String packageName;
        String phone_model;
        String androidVersion;
        
        String title;
        
        
        Context context;        

        public void checkForUpdates(Context context, String url, String title) {
                this.context = context;
                this.title = title;
                
                SharedPreferences prefs = context.getSharedPreferences(CHECKUPDATES, Context.MODE_PRIVATE);
                long lastCheck = prefs.getLong(LASTCHECK, 0);

                long now = System.currentTimeMillis(); //should i use  android.os.SystemClock.elapsedRealtime() instead ?
                Log.i(CHECKUPDATES, "Now=" + now + ",  lastCheck=" + lastCheck + ", lastCheck+timespan=" + (lastCheck + TIMESPAN_DAY) );
                
                if ( now > (lastCheck+TIMESPAN_DAY) ){

                        PackageManager pm = context.getPackageManager();
                        try {
                                PackageInfo pi;

                                pi = pm.getPackageInfo(context.getPackageName(), 0);

                                versionCode = pi.versionCode;
                                versionName = pi.versionName;
                                packageName = pi.packageName;
                                phone_model = android.os.Build.MODEL;
                                androidVersion = android.os.Build.VERSION.RELEASE;
                                
        
                                UpdateTask task = new UpdateTask();
                                task.execute(url);
                                

                        } catch (NameNotFoundException e) {
                                Log.e(CHECKUPDATES, "NamingException", e);
                        }

                }
        }
        
        class UpdateTask extends AsyncTask<String,Void,Void> {
                boolean result = false;
                int newestVersion = 0;

                @Override
                protected Void doInBackground(String... arg0) {                 
                        String requestUrl = arg0[0] + "?version=" + encode(versionName) + "&phone=" + encode(phone_model) + "&android=" + encode(androidVersion);
                        try {
                                URL url = new URL(requestUrl);
                                URLConnection conn = url.openConnection();
                                conn.setConnectTimeout(2500);
                                                                
                                String resultStr = readIOStream( conn.getInputStream() );
                                resultStr = resultStr.trim();
                                newestVersion = Integer.parseInt(resultStr);
                                
                                result = true;
                                
                        } catch (Exception e) {
                                Log.e(CHECKUPDATES, "Check for " + packageName + " failed!", e);
                        }
                                                
                        return null;
                }
                
                private String encode(String data) {
                        try {
                                return java.net.URLEncoder.encode(data, "UTF-8");
                        } catch (Exception e) {
                                return data; //if encoding fails, return original and hope all goes well
                        }
                }
                
                private String readIOStream(InputStream in) throws IOException {
                        ByteArrayOutputStream baos = new ByteArrayOutputStream();
                        
                        byte buf[] = new byte[1024];
                        int len;
                        
                        while ( (len=in.read(buf)) != -1) {
                                baos.write(buf, 0, len);
                        }
                        
                        return baos.toString(); 
                }

                @Override
                protected void onPostExecute(Void r) {
                        super.onPostExecute(r);
                        
                        Log.i(CHECKUPDATES, "result=" + result + ", newestVersion" + newestVersion + ", versionCode=" + versionCode);
                        
                        if (result == true) {
                                
                                long now = System.currentTimeMillis();
                                SharedPreferences prefs = context.getSharedPreferences(CHECKUPDATES, Context.MODE_PRIVATE);
                                //when done write 
                                Editor edit = prefs.edit();
                                edit.putLong(LASTCHECK, now);
                                edit.commit();
                                
                                if (newestVersion > versionCode) {
                                        AlertDialog.Builder builder = new AlertDialog.Builder(context);
                                        builder.setTitle(title);
                                        builder.setMessage("This application has an a newer version available. Update now?");
                                        
                                        builder.setPositiveButton("Yes", new OnClickListener() {                                                
                                                public void onClick(DialogInterface dialog, int which) {
                                                        Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse("market://search?q=pname:" + packageName) );
                                                        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK );
                                                        try {
                                                                context.startActivity(i);
                                                        } catch (Exception e) {
                                                                Log.e(CHECKUPDATES, "Activity launch failed", e);
                                                        }
                                                        context = null;
                                                        
                                                }
                                        });
                                        builder.setNegativeButton("No", new OnClickListener() {
                                                public void onClick(DialogInterface dialog, int which) {
                                                        context = null;
                                                }
                                        });
                                        
                                        try {
                                                builder.show();
                                        } catch (Exception e) {
                                                Log.e(CHECKUPDATES, "Builder.show failed", e);
                                        }
                                        
                                        
                                }
                                
                        }
                        
                }
                
        }
        
        
}
1	package dk.thoerup.checkupdates;
2
3	import java.io.ByteArrayOutputStream;
4	import java.io.IOException;
5	import java.io.InputStream;
6	import java.net.URL;
7	import java.net.URLConnection;
8
9	import android.app.AlertDialog;
10	import android.content.Context;
11	import android.content.DialogInterface;
12	import android.content.Intent;
13	import android.content.SharedPreferences;
14	import android.content.DialogInterface.OnClickListener;
15	import android.content.SharedPreferences.Editor;
16	import android.content.pm.PackageInfo;
17	import android.content.pm.PackageManager;
18	import android.content.pm.PackageManager.NameNotFoundException;
19	import android.net.Uri;
20	import android.os.AsyncTask;
21	import android.util.Log;
22
23	public class CheckUpdates {
24	final static long TIMESPAN_DAY = 246060*1000; // one day
25	final static String CHECKUPDATES = "CheckUpdates";
26	final static String LASTCHECK = "lastcheck";
27
28	int versionCode;
29	String versionName;
30	String packageName;
31	String phone_model;
32	String androidVersion;
33
34	String title;
35
36
37	Context context;
38
39	public void checkForUpdates(Context context, String url, String title) {
40	this.context = context;
41	this.title = title;
42
43	SharedPreferences prefs = context.getSharedPreferences(CHECKUPDATES, Context.MODE_PRIVATE);
44	long lastCheck = prefs.getLong(LASTCHECK, 0);
45
46	long now = System.currentTimeMillis(); //should i use android.os.SystemClock.elapsedRealtime() instead ?
47	Log.i(CHECKUPDATES, "Now=" + now + ", lastCheck=" + lastCheck + ", lastCheck+timespan=" + (lastCheck + TIMESPAN_DAY) );
48
49	if ( now > (lastCheck+TIMESPAN_DAY) ){
50
51	PackageManager pm = context.getPackageManager();
52	try {
53	PackageInfo pi;
54
55	pi = pm.getPackageInfo(context.getPackageName(), 0);
56
57	versionCode = pi.versionCode;
58	versionName = pi.versionName;
59	packageName = pi.packageName;
60	phone_model = android.os.Build.MODEL;
61	androidVersion = android.os.Build.VERSION.RELEASE;
62
63
64	UpdateTask task = new UpdateTask();
65	task.execute(url);
66
67
68	} catch (NameNotFoundException e) {
69	Log.e(CHECKUPDATES, "NamingException", e);
70	}
71
72	}
73	}
74
75	class UpdateTask extends AsyncTask<String,Void,Void> {
76	boolean result = false;
77	int newestVersion = 0;
78
79	@Override
80	protected Void doInBackground(String... arg0) {
81	String requestUrl = arg0[0] + "?version=" + encode(versionName) + "&phone=" + encode(phone_model) + "&android=" + encode(androidVersion);
82	try {
83	URL url = new URL(requestUrl);
84	URLConnection conn = url.openConnection();
85	conn.setConnectTimeout(2500);
86
87	String resultStr = readIOStream( conn.getInputStream() );
88	resultStr = resultStr.trim();
89	newestVersion = Integer.parseInt(resultStr);
90
91	result = true;
92
93	} catch (Exception e) {
94	Log.e(CHECKUPDATES, "Check for " + packageName + " failed!", e);
95	}
96
97	return null;
98	}
99
100	private String encode(String data) {
101	try {
102	return java.net.URLEncoder.encode(data, "UTF-8");
103	} catch (Exception e) {
104	return data; //if encoding fails, return original and hope all goes well
105	}
106	}
107
108	private String readIOStream(InputStream in) throws IOException {
109	ByteArrayOutputStream baos = new ByteArrayOutputStream();
110
111	byte buf[] = new byte[1024];
112	int len;
113
114	while ( (len=in.read(buf)) != -1) {
115	baos.write(buf, 0, len);
116	}
117
118	return baos.toString();
119	}
120
121	@Override
122	protected void onPostExecute(Void r) {
123	super.onPostExecute(r);
124
125	Log.i(CHECKUPDATES, "result=" + result + ", newestVersion" + newestVersion + ", versionCode=" + versionCode);
126
127	if (result == true) {
128
129	long now = System.currentTimeMillis();
130	SharedPreferences prefs = context.getSharedPreferences(CHECKUPDATES, Context.MODE_PRIVATE);
131	//when done write
132	Editor edit = prefs.edit();
133	edit.putLong(LASTCHECK, now);
134	edit.commit();
135
136	if (newestVersion > versionCode) {
137	AlertDialog.Builder builder = new AlertDialog.Builder(context);
138	builder.setTitle(title);
139	builder.setMessage("This application has an a newer version available. Update now?");
140
141	builder.setPositiveButton("Yes", new OnClickListener() {
142	public void onClick(DialogInterface dialog, int which) {
143	Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse("market://search?q=pname:" + packageName) );
144	i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK );
145	try {
146	context.startActivity(i);
147	} catch (Exception e) {
148	Log.e(CHECKUPDATES, "Activity launch failed", e);
149	}
150	context = null;
151
152	}
153	});
154	builder.setNegativeButton("No", new OnClickListener() {
155	public void onClick(DialogInterface dialog, int which) {
156	context = null;
157	}
158	});
159
160	try {
161	builder.show();
162	} catch (Exception e) {
163	Log.e(CHECKUPDATES, "Builder.show failed", e);
164	}
165
166
167	}
168
169	}
170
171	}
172
173	}
174
175
176	}