android concepts and code

http://androidmohan.blogspot.in/2012/06/android-concepts-and-code.html

Android Tools

Android Tools

Emulator –

-          Virtual Device

-          Can develop test and debug apps

-          Allows to run simultaneous apps

ADT – Android Development Tools

-          Plugin for eclipse integrated development environment

-          Increases speed and efficiency for developing android apps.

-          Allows the apps to access DDMS tool from eclipse.

-          Gives the wizard for basic new project creation.

DDMS – Dalvik Debug Monitor Service

-          Works with the emulator or the mobile device

-          Gives the information about the virtual devices and physical devices.

-          Thread and Heap tab for easy display.

-          Screen capture

-          Exploring the files

-          Causes Garbage collection

-          Running Log cat

ADB – Android Debug Bridge

-          Three core components

o   Client

o   Server

o   Daemon – A computer program that runs in the background like a thread. Don’t have user control.

-          Used to manage  the state of an emulator or a device.

-          Used to install any application directly from  PC to mobile or emulator

-          To manage SQLite DB.

AAPT – Android Asset Packaging Tool

-          Used to package the .apk file

-          Developers can use it directly to view , create and update  .zip, .jar and .apk files.

AIDL – Android Interface Description Language

-          Used for Inter process communication.

-          Interface based. Saves developers time.

Sqlite3

-          Allows to access the SQLite data files created and used by android apps

TraceView

-          Provides a graphical viewer for execution logs saved by your app

MKSDCARD

-          Helps you to create a disk image that you can use with the emulator

DX

-          Converts .class files to Android byte code.

ActivityCreator

-          Creates basic files that the developer needs, when the developer not using Eclipse.

Hierarchy Viewer

-          Gives the user interface to the projects and emulator

INSTALLATION

Required SWs

JDK 1.5 or higher

                Eclipse 3.5 or higher

                ADT Plugin for Eclipse

                Android SDK.

Process

                Install JDK and set path up to bin in to environment variables.

                Extract Eclipse and open eclipse.exe file.

                Then  helpàinstall new SW à give path to ADT pluginàthen install ADT plugin.

                Install Android SDK installer file. Then select the files and install.

                Then go to Windowsà preferencesàAndroidà give path of Android SDK, up to the root folder of tools folder.

                Then go to Windowsà Android SDK and AVD managerà Virtual Devicesà Create a new Virtual Device.

Now the Set up is completed.

Generate map key steps in android

https://developers.google.com/maps/documentation/android/mapkey



c:\>keytool.exe -list -alias androiddebugkey -keystore "C:\android\debug.keystore" -storepass android -keypass android

MD5 Key .............................

https://developers.google.com/android/maps-api-signup?hl=en-US

Basic Android Terminal and ADB Shell Command List

While rooting your Android Phone or installing custom ROM on your mobile or partitioning your android device to install applications, requires some android terminal command and ADB (Android Debug Bridge) shell command knowledge. Below is the list of some basic android commands that are being used on Android platform frequently and that every android user

must know.
 

Basic Android Terminal and ADB Shell Command List

1. How to open a cmd in Android Phone
Method 1: “Start” – “”Program”-” “Accessories” – “” Command Prompt ”
Method 2: “Start” – “” Run “, type cmd ENTER

2. How to restart Android Phone
When the phone and Computer is connected to the data cable, you can enter the following command

1	adb shell reboot === ENTER

3. Restart Android into Recovery Mode
With the data cable connected to your phone and computer, enter the following command

1	adb shell reboot recovery === ENTER

4. Convert back to ext2 partition
Restart the phone into Recovery mode, press “Alt + X” into the console. Open cmd and enter the following command

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adb shell === ENTER tune2fs-O ^ has_journal / dev/block/mmcblk0p2 === carriage return e2fsck / dev/block/mmcblk0p2 === carriage return (optional, can be a problem area in section 2, when used)

5. Pulling applications from Android phone to computer

1 2	adb pull /system/sd/app app adb pull /system/sd/app-private app-private

6. Pushing applications back to android phone from the computer

1 2	adb push app /system/sd/app adb push app-private /system/sd/app-private

7. Delete existing apps on Android SD

1 2	adb shell rm -r /system/sd/app adb shell rm -r /system/sd/app-private

8. Repair gravity System or switch to screen
Sometimes frequent brushing of phone can cause gravity system or switch to screen failure. Just follow the steps below-
Restart the phone into Recovery mode, press “Alt + X” into the console
Open cmd and enter the following command

1 2	mount / data === carriage return rm / data / misc / akmd * / data / misc / rild * === ENTER

9. Ext2/ext3/ext4 formatted partition
Enter the following command in the cmd

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adb remount === ENTER adb shell === ENTER rm-r / system / sd / * === carriage return

10. Remove/ system / app under the application
Under normal circumstances / system / app is not under an application. Use the following methods to remove these applications.
Open cmd and enter the following command

1 2	adb remount === ENTER adb rm / system / app / Stocks.apk === Enter

11. If the start Time is too Long
Just enter the following command in order to view the boot process.

1	adb logcat === ENTER

12. Through Terminal Partition SD card
It will erase everything on your SD card

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$  su # cd /data # wget http://64.105.21.209/bin/lib/droid/sdsplit # chmod 555 sdsplit # /data/sdsplit -fs *size* (add -nc to the end for JFv1.5ADP)

13. From the Recovery Screen, send an update file to your SD card.

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adb shell mount /sdcard adb shell rm /sdcard/update.zip adb push *filename* /sdcard/update.zip

14. Restoring a nandroid backup via Fastboot
Start command-prompt/terminal cd to the nandroid folder and enter following commands

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fastboot erase boot fastboot erase recovery fastboot flash system system.img fastboot flash boot boot.img fastboot flash userdata data.img fastboot flash recovery recovery.img fastboot reboot

15. Clear Search History in Android

Search History is accounted for Mobile Memory. It can also leak your privacy information as well. Just follow the steps below to clear android history.

Steps are as follows:

1. Make sure your mobile phone has Root authority.
2. Open the super-terminal.
3. Enter the following command

1 2	su rm / data / data / com.android.vending / databases / suggestions.db

4. Exit Hyper Terminal and restart the phone.

If you have a good one to add please post it in comment section