Android basic (Activity)

Package ahu.edu;
 
Import android. app. Activity;
Import android. content. Intent;
Import android. OS. Bundle;
Import android. view. Menu;
Import android. view. MenuItem;
Import android. view. View;
Import android. view. View. OnClickListener;
Import android. widget. Button;
Import android. widget. EditText;
Import android. widget. TextView;
 
Public class Activity03Activity extends Activity {

 

Private EditText factorOne;
Private EditText factorTwo;
Private TextView symbol;
Private Button calculate;
 
Public void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. main );

FactorOne = (EditText) findViewById (R. id. factorOne );
FactorTwo = (EditText) findViewById (R. id. factorTwo );
Symbol = (TextView) findViewById (R. id. symbol );
Calculate = (Button) findViewById (R. id. calculate );
Symbol. setText (R. string. symbol );
Calculate. setText (R. string. calculate );
Calculate. setOnClickListener (new CalcualteListener ());
}

Class CalcualteListener implements OnClickListener {
Public void onClick (View v ){
String factorOneStr = factorOne. getText (). toString ();
String factorTwoStr = factorTwo. getText (). toString ();
Intent intent = new Intent ();
Intent. putExtra ("one", factorOneStr );
Intent. putExtra ("two", factorTwoStr );
Intent. setClass (Activity03Activity. this, ResualActivity. class );
Activity03Activity. this. startActivity (intent );
}
}

Public boolean onCreateOptionsMenu (Menu menu ){
Menu. add (0, 1, 1, R. string. exit );
Menu. add (0, 2, 2, R. string. about );
Return super. onCreateOptionsMenu (menu );
}

Public boolean onOptionsItemSelected (MenuItem item ){
If (item. getItemId () = 1 ){
// Finish (); // ---- gentle Method
System. exit (0); // --- cruel method
}
Return super. onOptionsItemSelected (item );
}
 
}
[Java]
Package ahu.edu;
 
Import android. app. Activity;
Import android. content. Intent;
Import android. OS. Bundle;
Import android. widget. TextView;
 
Public class ResualActivity extends Activity {
Private TextView resultView;


Protected void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. result );
ResultView = (TextView) findViewById (R. id. result );
Intent intent = getIntent ();
String factorOneString = intent. getStringExtra ("one ");
String factorTwoString = intent. getStringExtra ("two ");
Int factorOneInt = Integer. parseInt (factorOneString );
Int factorTwoInt = Integer. parseInt (factorTwoString );
Int result = factorOneInt * factorTwoInt;
ResultView. setText (result + "");
}
}

[Html]
<? Xml version = "1.0" encoding = "UTF-8"?>
<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "fill_parent"
Android: layout_height = "fill_parent"
Android: orientation = "vertical">
 
<TextView
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: text = "@ string/hello"/>
<EditText
Android: id = "@ + id/factorOne"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: hint = "@ string/message"
Android: inputType = "none"/>
<TextView
Android: id = "@ + id/symbol"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: text = ""/>
<EditText
Android: id = "@ + id/factorTwo"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
Android: hint = "@ string/message"
Android: inputType = "none"/>
<Button
Android: id = "@ + id/calculate"
Android: layout_width = "fill_parent"
Android: layout_height = "wrap_content"
/>


</LinearLayout>

[Html]
<? Xml version = "1.0" encoding = "UTF-8"?>
<Manifest xmlns: android = "http://schemas.android.com/apk/res/android"
Package = "ahu.edu"
Android: versionCode = "1"
Android: versionName = "1.0" type = "codeph" text = "/codeph">
 
<Uses-sdk android: minSdkVersion = "10"/>
 
<Application
Android: icon = "@ drawable/ic_launcher"
Android: label = "@ string/app_name">
<Activity
Android: name = ". Activity03Activity"
Android: label = "@ string/app_name">
<Intent-filter>
<Action android: name = "android. intent. action. MAIN"/>
 
<Category android: name = "android. intent. category. LAUNCHER"/>
</Intent-filter>
</Activity>
<Activity
Android: name = ". ResualActivity"
Android: label = "@ string/app_name">

</Activity>
</Application>
 
</Manifest>

 

 

From Yours love affair