Download pptx - Android Bootcamp Tanzania:Overview of android platform

04/11/2023 KINU | Android Mobile BootCamp

Android Mobile Boot campKINU | TANZANIA


Android Platform Overview


Set Android Emulator

Not a Simulator!


Create new Android project


Android project layout


Android Key Concepts and building blocks


Activity Android Key Concepts


Android Widgets Android Key Concepts

Button

TextView

EditText

ImageView

ImageButton

And many more…..

INPUT OUTPUT


Android Intents Android Key Concepts

Intent about=new Intent(getApplicationContext(),About.class);startActivity(about);

SCREEN 1[ACTIVITY]

SCREEN 2[ACTIVITY]

provides runtime binding



Intent intent = new Intent(this, DisplayMessageActivity.class);

Parameters

Context

The Class of the app component to which the system should deliver the Intent (in this case, the activity that should be started)



Carry Collection of Data to another Activity

extras

putExtra

public void sendMessage(View view) { Intent intent = new Intent(this, DisplayMessageActivity.class); EditText editText = (EditText) findViewById(R.id.edit_message); String message = editText.getText().toString(); intent.putExtra(EXTRA_MESSAGE, message); startActivity(intent);}

Receive Intent

Intent intent = getIntent();String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);


XML codesAndroid Key Concepts

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent"android:background="#008080">


Android Manifest FileAndroid Key Concepts

Think of plane manifest!

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.randomname.costech" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/appicon" android:label="@string/app_name"> <activity android:name=".AppStartmenu" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity>


Android Manifest FileAndroid Key Concepts

<activity android:name=".Startmenu"></activity><activity android:name=".About"></activity><activity android:name=".Help"></activity> </application> <uses-sdk android:minSdkVersion="8" /></manifest>

Think of plane manifest!


Android layoutsAndroid Key Concepts

Linear Layout

Absolute layout

Frame layout


Android Menus [options menu] Android Key Concepts


Android Icons

Android Key Concepts


Android App Deployment

Android Key Concepts

APK FILE


1 Reference Android App


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