Customizing Toasts A toast notification is a message that pops up on the surface of the window. It only fills the amount of space required for the message and the user's current activity remains visible and interactive. The notification automatically fades in and out, and does not accept interaction events. The Basics You can create customized Toasts and setting its display position, as you like. Here's a little code snippet to demonstrate how it works: String text = “example … [Read more...]

SQLite is an embedded SQL database engine. Unlike most other SQL databases, SQLite does not have a separate server process. SQLite reads and writes directly to ordinary disk files. A complete SQL database with multiple tables, indices, triggers, and views, is contained in a single disk file. Basic SQLite commands: 1, Create table 1.  CREATE TABLE testtable (id integer primary key, name text); 2, Insert into table 1.  INSERT INTO "testtable" VALUES(1,'Joseph'); 3, Create a … [Read more...]

SDK Version: M3 So the other day, I was asked to check out how we could use soap on Android, preferably with ksoap2 for android, and a public SOAP Web Service. For the latter the TopGoalScorers web service was chosen. This example will prepare a soap message with one extra variable and value (iTopN, 5) and get a soap object as response. private static final String METHOD_NAME = "TopGoalScorers"; private static final String SOAP_ACTION = … [Read more...]

This tutorial shows how to redirect the user to a system settings screen asking to modify some settings the application depends on. We will make a specific example with GPS: The application can be used only if GPS is available. The android systems GPS setting screen can be called just like any other Activities: startActivityForResult(newIntent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS), 0); To check GPS availability use the code code below: (the Activity must implement … [Read more...]

Today we'll create an easy email sender application. First of all we need to create a layout to set the address, the subject and email body box. <?xml version="1.0" encoding="utf-8"?><LinearLayout android:id="@ +id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical"><LinearLayout android:id="@+id/LinearLayout02" android:layout_width="wrap_content" … [Read more...]

ERROR/dalvikvm-heap(4204): 691456-byte external allocation too large for this process. 01-25 22:13:18.694: ERROR/(4204): VM won't let us allocate 691456 bytes 01-25 22:13:18.694 If you have ever got the message above, you are at the right place. First of all the reason: Heap size != External Memory size Dalvik's external memory that a process can use is limited to ~ 4MB-s (That is the Ugly Truth). If it's overflow, you get the BitmapFactory.DecodeFile Error. That's why even if you have … [Read more...]

There is more than one way, to play media files on an Android phone, let me show you two of them. Audio: MediaPlayer is the easier way, if you just want to play an audio file in the background, somewhere in an appliaction. There are no ui controls here, but of course you can use MediaPlayer.stop(), play(), seekTo() ,etc. Just bind the needed functions to a button, gesture, or event. As you can see, it also throws a lot of exceptions, which you need to catch. public void audioPlayer(String … [Read more...]