Nokia Lumia 920 or Windows Phone black screen and dead

If your windows phone or Nokia Lumia suddenly blank screen or DEAD, don’t throw away! press Volume Down + Power for 10 seconds. It will revived!

Trust me, Nokia phone isn’t easy to die :)

Lock 3G 4G network in Nokia Lumia Windows Phone

I use Nokia Lumia 920 at this example. To lock Nokia lumia network on 3G / 4G only, we can do quick setup by:

1. Go to dial-pad
Type : ##3282 and call

For older version, please type : ##3282#.

Click settings on right-bottom
From this settings, we can set network running on 2G only, 3G only or even 4G only (LTE).

Here is the steps:
Continue reading →

Solve android XMLRPC client can’t connect to 127.0.0.1 or localhost

When you got error that your Android application can’t do XMLRPC client to host like 127.0.0.1 or localhost or some IP address like this:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
01-16 03:45:06.650: W/System.err(7414): org.apache.http.conn.HttpHostConnectException: Connection to http://192.168.1.4:8000 refused
01-16 03:45:06.660: W/System.err(7414):         at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:178)
01-16 03:45:06.660: W/System.err(7414):         at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
01-16 03:45:06.660: W/System.err(7414):         at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
01-16 03:45:06.660: W/System.err(7414):         at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:359)
01-16 03:45:06.660: W/System.err(7414):         at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
01-16 03:45:06.660: W/System.err(7414):         at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
01-16 03:45:06.660: W/System.err(7414):         at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
01-16 03:45:06.660: W/System.err(7414):         at org.xmlrpc.android.XMLRPCClient.callEx(XMLRPCClient.java:178)
01-16 03:45:06.660: W/System.err(7414):         at org.xmlrpc.android.XMLRPCClient.call(XMLRPCClient.java:281)
01-16 03:45:06.660: W/System.err(7414):         at zin.my.rashidi.android.demo.xmlrpc.LoginActivity$1.onClick(LoginActivity.java:43)
01-16 03:45:06.670: W/System.err(7414):         at android.view.View.performClick(View.java:2485)
01-16 03:45:06.670: W/System.err(7414):         at android.view.View$PerformClick.run(View.java:9080)
01-16 03:45:06.670: W/System.err(7414):         at android.os.Handler.handleCallback(Handler.java:587)
01-16 03:45:06.670: W/System.err(7414):         at android.os.Handler.dispatchMessage(Handler.java:92)
01-16 03:45:06.670: W/System.err(7414):         at android.os.Looper.loop(Looper.java:130)
01-16 03:45:06.670: W/System.err(7414):         at android.app.ActivityThread.main(ActivityThread.java:3687)
01-16 03:45:06.670: W/System.err(7414):         at java.lang.reflect.Method.invokeNative(Native Method)
01-16 03:45:06.670: W/System.err(7414):         at java.lang.reflect.Method.invoke(Method.java:507)
01-16 03:45:06.670: W/System.err(7414):         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
01-16 03:45:06.670: W/System.err(7414):         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
01-16 03:45:06.670: W/System.err(7414):         at dalvik.system.NativeStart.main(Native Method)
01-16 03:45:06.680: W/System.err(7414): Caused by: java.net.ConnectException: /192.168.1.4:8000 - Connection refused
01-16 03:45:06.690: W/System.err(7414):         at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:207)
01-16 03:45:06.690: W/System.err(7414):         at org.apache.harmony.luni.net.PlainSocketImpl.connect(PlainSocketImpl.java:437)
01-16 03:45:06.690: W/System.err(7414):         at java.net.Socket.connect(Socket.java:1002)
01-16 03:45:06.690: W/System.err(7414):         at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
01-16 03:45:06.690: W/System.err(7414):         at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:143)
01-16 03:45:06.690: W/System.err(7414):         ... 20 more
01-16 03:45:06.700: W/System.err(7414): org.xmlrpc.android.XMLRPCException: org.apache.http.conn.HttpHostConnectException: Connection to http://192.168.1.4:8000 refused
01-16 03:45:06.700: W/System.err(7414):         at org.xmlrpc.android.XMLRPCClient.callEx(XMLRPCClient.java:237)
01-16 03:45:06.700: W/System.err(7414):         at org.xmlrpc.android.XMLRPCClient.call(XMLRPCClient.java:281)
01-16 03:45:06.700: W/System.err(7414):         at

Continue reading →

Android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 1

If we got this errors :

1
Android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 1

What we want?
We want to create a new records and read it.

Problem?
Data is created but we can’t read the new saved records.

Solution? using “moveToFirst()”. Here is the example:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
public Cursor createNewRecord() {
        // Set the new records ID
    long insertId = database.insert(dbHelper.TABLE_TRACKER, null, values);
   
    // Inserting a new records
    mCursor = database.query(dbHelper.TABLE_TRACKER,
            allColumns, dbHelper.COLUMN_ID + " = " + insertId,
            null, null, null, null);
   
    mCursor.moveToFirst();  // This will read the NEW RECORD DATA      

    // Mapping cursor data into newData
    UserDatabase newData = cursorToUser(mCursor);
   
    // Close cursor connection
    mCursor.close();
   
    return newData;
}

/**
 * Mapping cursor into UserDatabase handler
 * @param cursor
 * @return
 */
private UserDatabase cursorToUser(Cursor cursor) {
    UserDatabase userDatabase = new UserDatabase();
    userDatabase.setId(cursor.getLong(0));
    userDatabase.setDay(cursor.getInt(1));
    userDatabase.setIsExercise(cursor.getInt(2));

    return userDatabase;
}

Check if Cursor data is exists or not with SQLite database in Android

When creating a data, sometimes we need to check whether there is a previous data that can be updated or not. To check if data is exists or not, we can use “cursor.moveToFirst()” instead of “cursor.getCount() > 0″. Simple example :

1
2
3
4
5
6
7
8
9
// Check if days is exists
mCursor = database.query(dbHelper.TABLE_TRACKER,
        allColumns, dbHelper.COLUMN_DAY + "=?",
        new String[] {Integer.toString(day)}, null, null, null, null);
       
// If data exists, then update the records
if(mCursor.moveToFirst()) {
    // Do your update logic here
}

But, then we can do enhancement like if data exists, then update the data. Meanwhile, if there no records, then create a new records. Here is the implementation :

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Cursor mCursor;

// Check if days is exists
mCursor = database.query(dbHelper.TABLE_TRACKER,
        allColumns, dbHelper.COLUMN_DAY + "=?",
        new String[] {Integer.toString(day)}, null, null, null, null);
       
// If data exists, then update the records
if(mCursor.moveToFirst()) {
    database.update(dbHelper.TABLE_TRACKER, values,
            dbHelper.COLUMN_ID + "=?",
            new String[] {String.valueOf(mCursor.getColumnIndex("id"))}
    );

} else {
    // Set the new records ID
    long insertId = database.insert(dbHelper.TABLE_TRACKER, null, values);
   
    // Inserting a new records
    mCursor = database.query(dbHelper.TABLE_TRACKER,
            allColumns, dbHelper.COLUMN_ID + " = " + insertId,
            null, null, null, null);
   
    mCursor.moveToFirst(); // To get the records
}

...
mCursor.close()

BodySlap – Fitness and Workout Tracker Android Application part 3

After working with the Dialog and Toast, now in the part 3, BodySlap application (which the previous name is Calendar app) now support for taking photos after workout!

The details update and lesson I’ve learned :

1. Intent is a great way to make UI faster and organize the action between activity.
2. Taking picture from Camera and create a storage album for saving the picture
3. Create a listener and attach them into property like Button, Dialog will make code easy to read

Here is the results:

You can grab this on my github : https://github.com/yodiaditya/android

Previous version :
http://www.yodi.biz/2012/12/16/immediate-update-item-cells-in-gridview-android/
http://www.yodi.biz/2012/12/09/build-calendar-applications-with-todo-list-and-activity-in-android-part-2/
http://www.yodi.biz/2012/12/08/build-calendar-applications-with-todo-list-and-activity-in-android-part-1/

Get the today date in string format in Java

Date() in java.utils provide Date instance which contains the date of today. We can showing the day, month, year of today from Date() instance using SimpleDateFormat().format().

Example:

1
String today = new SimpleDateFormat("yyyyMMdd_HH:mm:ss").format(new Date());

Simple!

Convert String to Integer and Integer to String in Java vice versa

To convert Integer into String in Java, we can use toString() method in Integer class instance :

1
2
Integer hello = 1;
String convert = Integer.toString(hello);

Then, to convert String into Integer, we can use parseInt() method in Integer class instance:

1
2
String hello = "1";
Integer convert = Integer.parseInt(hello);

Easy! :)

Example Dialog box in Android

Dialog is the good way to providing floating menu in Android which users can do several actions on there. It’s different with Toast which is have purpose for showing information only. At this example, we can try which showing selection menu in Dialog box.

For instance, We will make Users can click Button and Dialog will be pop-up. Suppose we have activity like this:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
public class MainActivity extends Activity {
    private static final int DIALOG_ALERT = 10;
    private static final String ANDROID_TAG = "ANDROID";
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Button workout = (Button) findViewById(R.id.top_done_button);
        workout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(DIALOG_ALERT);
            }
        });
    }

showDialog() is built-in method which will showing Dialog based on the unique ID. Later, we can give related Dialog based on ID using switch(). But we should know that showDialog will be expecting for onCreateDialog() method to process all showDialog() request.
Continue reading →

Immediate update item cells in GridView android

We can update immediately background color in items cells (on visibile view) by calling invalidateViews() after do the update. Here is the implementation :

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
// Set image adapter instance from private variable
imageAdapter = new ItemAdapter(this);

// Bind Gridview with calendar XML and set the Adapter
final GridView gridView = (GridView) findViewById(R.id.calendar);
gridView.setAdapter(imageAdapter);

Button workout = (Button) findViewById(R.id.top_done_button);
workout.setOnClickListener(new View.OnClickListener() {        
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        Context context = getApplicationContext();
        String text = "Yeah! You're ready workout now!";
        Toast toast = Toast.makeText(context, text,
                Toast.LENGTH_SHORT);
        toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
        toast.show();
       
        // Set date pickers cells
        imageAdapter.setDatePicker(today.getDate());
        gridView.invalidateViews();
    }
});

invalidateViews() called after we doing update on Gridviews items on setDatePicker() method.
Here is the result (without scrolling to update the views) :

And, after I click the workout button:

Next update:
http://www.yodi.biz/2012/12/22/bodyslap-fitness-and-workout-tracker-android-application-part-3/