Introduce ApplicationObject. Move Preferences and API object to this

class

AndroidManifest.xml

@@ -14,7 +14,9 @@
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
-        android:theme="@style/AppTheme" >
+        android:theme="@style/AppTheme" 
+        android:name="com.marakana.yambax.YambaApplication">
+
         <activity
             android:name="com.marakana.yambax.StatusActivity"
             android:label="@string/app_name" >

src/com/marakana/utils/TwitterAPI.xtend

@@ -1,20 +1,30 @@
 package com.marakana.utils
 
 import winterwell.jtwitter.Twitter
+import android.content.SharedPreferences
 
 class TwitterAPI
 {
   var Twitter twitter
-
-  new ()
+
+  new (String username, String password, String root)
+  {
+    this.twitter = new Twitter(username, password)
+    twitter.setAPIRootUrl(root)
+  }
+
+  def changeAccount(SharedPreferences prefs)
   {
-    this.twitter = new Twitter("student", "password")
-    twitter.setAPIRootUrl("http://yamba.marakana.com/api")
+  	val username = prefs.getString("username", "student")
+  	val password = prefs.getString("password", "password")
+  	val root     = prefs.getString("apiRoot", "http://yamba.marakana.com/api")
+  	this.twitter = new Twitter(username, password)
+    twitter.setAPIRootUrl(root)
   }
 
   def String updateStatus (String status)
   { 
     val result = twitter.updateStatus(status)
     result.text
   }
-}
+}

src/com/marakana/yambax/StatusActivity.xtend

@@ -4,29 +4,27 @@ import android.app.Activity
 import android.os.Bundle
 import android.widget.EditText
 import android.widget.Button
-import android.util.Log
-import com.marakana.utils.TwitterAPI
 import android.view.Menu
 import android.view.MenuItem
 import android.content.Intent
+import android.view.View.OnClickListener
 
 class StatusActivity extends Activity
 {
-  val twitter = new TwitterAPI
+  var EditText       editText
+  var Button         updateButton
+
+  var update       = [ new TwitterPoster(this).execute(editText.getText.toString)  ] as OnClickListener
 
   override onCreate(Bundle savedInstanceState)
   {
     super.onCreate(savedInstanceState)
     setContentView(R.layout.activity_status)
+
+    editText     = findViewById(R.id.editText) as EditText
+    updateButton = findViewById(R.id.buttonUpdate) as Button
 
-    val editText     = findViewById(R.id.editText) as EditText
-    val updateButton =  findViewById(R.id.buttonUpdate) as Button
-
-    updateButton.setOnClickListener = [ 
-    	                                val twitterPoster = new TwitterPoster(twitter, this)
-                                        twitterPoster.execute(editText.getText().toString())
-                                        Log.d("YAMBA", "onClicked") 
-                                      ]
+    updateButton.setOnClickListener = update   
   }
 
   override  onCreateOptionsMenu(Menu menu)

src/com/marakana/yambax/TwitterPoster.xtend

@@ -6,15 +6,16 @@ import winterwell.jtwitter.TwitterException
 import android.widget.Toast
 import android.app.Activity
 import com.marakana.utils.TwitterAPI
- 
+
 class TwitterPoster extends AsyncTask<String, Integer, String>
 {
-  var TwitterAPI twitter
-  var Activity activity
-
-  new(TwitterAPI twitter, Activity activity)
+  val TwitterAPI twitter
+  val Activity activity 
+ 
+  new(Activity activity)
   {
-    this.twitter = twitter
+    var app = activity.getApplication() as YambaApplication
+    this.twitter = app.twitter
     this.activity = activity
   }
 

src/com/marakana/yambax/YambaApplication.xtend

@@ -0,0 +1,27 @@
+package com.marakana.yambax
+
+import com.marakana.utils.TwitterAPI
+import android.content.SharedPreferences
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener
+import android.app.Application
+import android.preference.PreferenceManager
+
+class YambaApplication extends Application
+{
+  @Property TwitterAPI twitter
+
+  var prefsChanged = [ SharedPreferences prefs, String s|
+                       twitter.changeAccount(prefs)  ]  as OnSharedPreferenceChangeListener
+
+  override onCreate()
+  {
+    super.onCreate
+    twitter = new TwitterAPI("student", "password", "http://yamba.marakana.com/api")
+    PreferenceManager.getDefaultSharedPreferences(this).registerOnSharedPreferenceChangeListener = prefsChanged     
+  }
+
+  override onTerminate()
+  {
+    super.onTerminate
+  }
+}