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 {
        public 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(5);
                                                                
                                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) );
                                                        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	torben	719	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			public static long TIMESPAN_DAY = 246060*1000; // one day
25	torben	722	final static String CHECKUPDATES = "CheckUpdates";
26	torben	724	final static String LASTCHECK = "lastcheck";
27	torben	719
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	torben	722	SharedPreferences prefs = context.getSharedPreferences(CHECKUPDATES, Context.MODE_PRIVATE);
44	torben	724	long lastCheck = prefs.getLong(LASTCHECK, 0);
45	torben	719
46			long now = System.currentTimeMillis(); //should i use android.os.SystemClock.elapsedRealtime() instead ?
47	torben	724	Log.i(CHECKUPDATES, "Now=" + now + ", lastCheck=" + lastCheck + ", lastCheck+timespan=" + (lastCheck + TIMESPAN_DAY) );
48	torben	719
49	torben	723	if ( now > (lastCheck+TIMESPAN_DAY) ){
50	torben	719
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	torben	722	Log.e(CHECKUPDATES, "NamingException", e);
70	torben	719	}
71
72			}
73			}
74
75			class UpdateTask extends AsyncTask<String,Void,Void> {
76			boolean result = false;
77			int newestVersion = 0;
78
79			@Override
80	torben	721	protected Void doInBackground(String... arg0) {
81			String requestUrl = arg0[0] + "?version=" + encode(versionName) + "&phone=" + encode(phone_model) + "&android=" + encode(androidVersion);
82	torben	719	try {
83			URL url = new URL(requestUrl);
84			URLConnection conn = url.openConnection();
85			conn.setConnectTimeout(5);
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	torben	722	Log.e(CHECKUPDATES, "Check for " + packageName + " failed!", e);
95	torben	719	}
96
97			return null;
98			}
99
100	torben	721	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	torben	719	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	torben	722	Log.i(CHECKUPDATES, "result=" + result + ", newestVersion" + newestVersion + ", versionCode=" + versionCode);
126	torben	719
127			if (result == true) {
128	torben	724
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	torben	719	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			try {
145			context.startActivity(i);
146			} catch (Exception e) {
147	torben	722	Log.e(CHECKUPDATES, "Activity launch failed", e);
148	torben	719	}
149			context = null;
150
151			}
152			});
153			builder.setNegativeButton("No", new OnClickListener() {
154			public void onClick(DialogInterface dialog, int which) {
155			context = null;
156			}
157			});
158
159			try {
160			builder.show();
161			} catch (Exception e) {
162	torben	722	Log.e(CHECKUPDATES, "Builder.show failed", e);
163	torben	719	}
164
165
166			}
167
168			}
169
170			}
171
172			}
173
174
175			}