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Android

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Android Architecture ================================== 1. Linux Kernal 2. Hardware Abstraction Layer 3. Native C/C++ Library along with ART 4. Java API framework 5. System Apps Application components ======================= 1. Application components are the essential building blocks of the application, 2. This components are loosely coupled from the manifest file, 3. AndroidManifest.xml describes each component of the application and how they interact 4. Basic Components : Activities,services,broadcastreciver,contentproviders,Notifications 5. Additional components: Fragments,views,Layouts,resources and manifest. Activities : ============ 1. Activity represents a single screen with an user interface. 2. One app can contain any number of activities all activities must be registered in the androidmanifest.xml file 3. To create an Activity we must create a class that Extends AppCompatActivity and overide onCreate() method Syntax: Class MyActivity Extends Appco...
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How to Generate Key Hash for FaceBook Integration

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To Generate Key Hash we have 2 Ways Way 1 : ====== Just follow the below given Steps and you are done with this. Step I: Download OpenSSL from   here Step II: Download openssl-0.9.8e_X64.zip for 64 bit PC and openssl-0.9.8e_WIN32.zip for 32 bit PC Step III: once your download the zip folder. Go to C drive(where window is installed) and make a folder named OpenSSL Step IV: extract all zip file in this folder. Step V: Now go to Java folder and copy path of jre. For example: C:\Program Files\Java\jre1.8.0_101\bin (make sure your are in JRE folder not in JDK folder,) Step VI: Now open Cmd in your PC. Type Cd C:\Program Files\Java\jre1.8.0_101\bin Now copy the below code after this keytool -exportcert -alias androiddebugkey -keystore "C:\Users\Aravindraj\.android\debug.keystore" | "C:\openssl\bin\openssl" sha1 -binary |"C:\openssl\bin\openssl" base64 instead of Aravindraj you need to use your computer name. an...
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Crypto Exchanger