This section provides an insight into the debugging of an Android application. The USB debugging in Android is also explained.
DDMS stands for Dalvik Debug Monitor Server. For the interacting operation of our android device or virtual device and our android application program Eclipse allows a perspective. For opening this perspective we choose in the following way.
Select Window → Open Perspective → Other → DDMS
The perspective contains several Views and used as independently. It permits
- The application to place calls and send SMS to the device.
- The application to set the current geo position.
- To perform a performance trace of our application.
The LogCat view helps to see the log or including the System.out.print() statements.
The files explorer helps to show the files on the Android simulator.
A shell is a program that obeys our keyboard input from the user and performs actions as directed by the user. The android emulator can access through the console. Open a shell, switch to your “android-sdk” installation directory into the folder “tools”. For starting the shell we use the following syntax.
Syntax: – adb shell
We can copy the file through the following command.
Syntax: – // Assume the gesture file exists on your Android device
adb pull /sdcard/gestures ~/test
// Now copy it back
adb push ~/test/gesture /sdcard/gestures2
The application data is saved in the directory called “/data/data/package_of_your_app”.
More devices are running we can issue commands to one individual device.
# Lists all devices adb devices #Result List of devices attached emulator-5554 attached emulator-5555 attached # Issue a command to a specific device adb -s emulator-5554 shell
Uninstall an application through adb
For uninstall an android application through an android application through the shell we switch the data/app directory (cd/data/app) and then delete our android application. We can also uninstall the application through the shell adb with package name.
Syntax: – adb uninstall <packagename>
Emulator console through telnet
We can use telnet to connect adb to the device. This permits to simulate certain things like incoming call, change the network “stability”, set our current geocodes etc. for establishing the connection to our simulated device we use “telnet localhost 5554” and for exiting the console session we use the command “quit” “exit”.
Eg: – To change the power settings of our phone to receive an sms and to get an incoming call we use the following codes.
# connects to device telnet localhost 5554 # set the power level power status full power status charging # make a call to the device gsm call 012041293123 # send a sms to the device sms send 12345 Will be home soon # set the geo location geo fix 48 51
Deploy the Application on a real device
To turn on “USB Debugging” on our device in we select in the settings Applications > Development then enables USB debugging. We need to install the driver for our mobile phone and you should note that the android version we used to developing must be installed version on your phone.
To select your phone, select the “Run Configurations”, select “Manual” selection and select your device.
- Android Installation
- Android Basics
- Android Drawables
- Android Architecture
- Debugging Android
- Android Style and Android Screen Size
- Android Fragment
- Android Menus and Action Bar
- First Android Project
- Android Layout
- Android Exception
- Android Development
- Ten things an Android developer should know
- Eight common mistakes that Android developers do
- New Android Interview Questions and Answers for beginners
- How to debug Android applications when your emulators are slow