Refactor Chromoting.java to pull out some nested classes.

remoting/android/java/src/org/chromium/chromoting/Chromoting.java

Index: remoting/android/java/src/org/chromium/chromoting/Chromoting.java
diff --git a/remoting/android/java/src/org/chromium/chromoting/Chromoting.java b/remoting/android/java/src/org/chromium/chromoting/Chromoting.java
index cd258d2532bb4fafa6be1cd6545eba976d1e6725..520690d89d11f898185ca8553252b57496d9ae07 100644
--- a/remoting/android/java/src/org/chromium/chromoting/Chromoting.java
+++ b/remoting/android/java/src/org/chromium/chromoting/Chromoting.java
@@ -11,18 +11,14 @@ import android.accounts.AccountManagerFuture;
 import android.accounts.AuthenticatorException;
 import android.accounts.OperationCanceledException;
 import android.app.Activity;
-import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.HandlerThread;
-import android.text.Html;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
-import android.view.View;
-import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
 import android.widget.TextView;
@@ -54,11 +50,9 @@ public class Chromoting extends Activity {
     private static final String HOST_LIST_PATH =
             "https://www.googleapis.com/chromoting/v1/@me/hosts?key=";
 
-    /** Color to use for hosts that are online. */
-    private static final String HOST_COLOR_ONLINE = "green";
-
-    /** Color to use for hosts that are offline. */
-    private static final String HOST_COLOR_OFFLINE = "red";
+    /** Lock to protect |mAccount| and |mToken|. */
+    // TODO(lambroslambrou): |mHosts| needs to be protected as well.
+    private Object mLock = new Object();
 
     /** User's account details. */
     private Account mAccount;
@@ -188,12 +182,37 @@ public class Chromoting extends Activity {
         return true;
     }
 
+    /** Called when the user taps on a host entry. */
+    public void connectToHost(JSONObject host) {
+        try {
+            synchronized (mLock) {
+                JniInterface.connectToHost(mAccount.name, mToken, host.getString("jabberId"),
+                        host.getString("hostId"), host.getString("publicKey"),
+                        new Runnable() {
+                                @Override
+                                public void run() {
+                                    startActivity(new Intent(Chromoting.this, Desktop.class));
+                                }
+                        });
+            }
+        } catch (JSONException ex) {
+            Log.w("host", ex);
+            Toast.makeText(this, getString(R.string.error_reading_host),
+                    Toast.LENGTH_LONG).show();
+            // Close the application.
+            finish();
+        }
+    }
+
     /**
      * Processes the authentication token once the system provides it. Once in possession of such a
      * token, attempts to request a host list from the directory server. In case of a bad response,
      * this is retried once in case the system's cached auth token had expired.
      */
     private class HostListDirectoryGrabber implements AccountManagerCallback<Bundle> {
+        // TODO(lambroslambrou): Refactor this class to provide async interface usable on the UI
+        // thread.
+
         /** Whether authentication has already been attempted. */
         private boolean mAlreadyTried;
 
@@ -221,7 +240,7 @@ public class Chromoting extends Activity {
                 String authToken = result.getString(AccountManager.KEY_AUTHTOKEN);
                 Log.i("auth", "Received an auth token from system");
 
-                synchronized (mUi) {
+                synchronized (mLock) {
                     mAccount = new Account(accountName, accountType);
                     mToken = authToken;
                     getPreferences(MODE_PRIVATE).edit().putString("account_name", accountName).
@@ -262,7 +281,7 @@ public class Chromoting extends Activity {
                     if (!mAlreadyTried) {
                         // This was our first connection attempt.
 
-                        synchronized (mUi) {
+                        synchronized (mLock) {
                             if (mAccount != null) {
                                 // We got an account, but couldn't log into it. We'll retry in case
                                 // the system's cached authentication token had already expired.
@@ -289,7 +308,6 @@ public class Chromoting extends Activity {
                     }
                 } else if (ex instanceof JSONException) {
                     explanation = getString(R.string.error_unexpected_response);
-                    runOnUiThread(new HostListDisplayer(mUi));
                 }
 
                 mHosts = null;
@@ -298,126 +316,51 @@ public class Chromoting extends Activity {
             }
 
             // Share our findings with the user.
-            runOnUiThread(new HostListDisplayer(mUi));
+            runOnUiThread(new Runnable() {
+                    @Override
+                    public void run() {
+                        updateUi();
+                    }
+            });
         }
     }
 
-    /** Formats the host list and offers it to the user. */
-    private class HostListDisplayer implements Runnable {
-        /** Communication with the screen. */
-        private Activity mUi;
-
-        /** Constructor. */
-        public HostListDisplayer(Activity ui) {
-            mUi = ui;
-        }
-
-        /**
-         * Updates the infotext and host list display.
-         * This method affects the UI and must be run on its same thread.
-         */
-        @Override
-        public void run() {
-            synchronized (mUi) {
-                mRefreshButton.setEnabled(mAccount != null);
-                if (mAccount != null) {
-                    mAccountSwitcher.setTitle(mAccount.name);
-                }
-            }
-
-            if (mHosts == null) {
-                mGreeting.setText(getString(R.string.inst_empty_list));
-                mList.setAdapter(null);
-                return;
-            }
-
-            mGreeting.setText(getString(R.string.inst_host_list));
-
-            ArrayAdapter<JSONObject> displayer = new HostListAdapter(mUi, R.layout.host);
-            Log.i("hostlist", "About to populate host list display");
-            try {
-                int index = 0;
-                while (!mHosts.isNull(index)) {
-                    displayer.add(mHosts.getJSONObject(index));
-                    ++index;
-                }
-                mList.setAdapter(displayer);
-            }
-            catch(JSONException ex) {
-                Log.w("hostlist", ex);
-                Toast.makeText(
-                        mUi, getString(R.string.error_cataloging_hosts), Toast.LENGTH_LONG).show();
-
-                // Close the application.
-                finish();
+    /**
+     * Updates the infotext and host list display.
+     * This method affects the UI and must be run on the main thread.
+     */
+    private void updateUi() {
+        synchronized (mLock) {
+            mRefreshButton.setEnabled(mAccount != null);
+            if (mAccount != null) {
+                mAccountSwitcher.setTitle(mAccount.name);
             }
         }
-    }
 
-    /** Describes the appearance and behavior of each host list entry. */
-    private class HostListAdapter extends ArrayAdapter<JSONObject> {
-        /** Constructor. */
-        public HostListAdapter(Context context, int textViewResourceId) {
-            super(context, textViewResourceId);
+        if (mHosts == null) {
+            mGreeting.setText(getString(R.string.inst_empty_list));
+            mList.setAdapter(null);
+            return;
         }
 
-        /** Generates a View corresponding to this particular host. */
-        @Override
-        public View getView(int position, View convertView, ViewGroup parent) {
-            TextView target = (TextView)super.getView(position, convertView, parent);
+        mGreeting.setText(getString(R.string.inst_host_list));
 
-            try {
-                final JSONObject host = getItem(position);
-                target.setText(Html.fromHtml(host.getString("hostName") + " (<font color = \"" +
-                        (host.getString("status").equals("ONLINE") ? HOST_COLOR_ONLINE :
-                        HOST_COLOR_OFFLINE) + "\">" + host.getString("status") + "</font>)"));
-
-                if (host.getString("status").equals("ONLINE")) {  // Host is online.
-                    target.setOnClickListener(new View.OnClickListener() {
-                            @Override
-                            public void onClick(View v) {
-                                try {
-                                    synchronized (getContext()) {
-                                        JniInterface.connectToHost(mAccount.name, mToken,
-                                                host.getString("jabberId"),
-                                                host.getString("hostId"),
-                                                host.getString("publicKey"),
-                                                new Runnable() {
-                                            @Override
-                                            public void run() {
-                                                startActivity(
-                                                        new Intent(getContext(), Desktop.class));
-                                            }
-                                        });
-                                    }
-                                }
-                                catch(JSONException ex) {
-                                    Log.w("host", ex);
-                                    Toast.makeText(getContext(),
-                                            getString(R.string.error_reading_host),
-                                            Toast.LENGTH_LONG).show();
-
-                                    // Close the application.
-                                    finish();
-                                }
-                            }
-                        });
-                } else {  // Host is offline.
-                    // Disallow interaction with this entry.
-                    target.setEnabled(false);
-                }
+        ArrayAdapter<JSONObject> displayer = new HostListAdapter(this, R.layout.host);
+        Log.i("hostlist", "About to populate host list display");
+        try {
+            int index = 0;
+            while (!mHosts.isNull(index)) {
+                displayer.add(mHosts.getJSONObject(index));
+                ++index;
             }
-            catch(JSONException ex) {
-                Log.w("hostlist", ex);
-                Toast.makeText(getContext(),
-                        getString(R.string.error_displaying_host),
-                        Toast.LENGTH_LONG).show();
-
-                // Close the application.
-                finish();
-            }
-
-            return target;
+            mList.setAdapter(displayer);
+        } catch (JSONException ex) {
+            Log.w("hostlist", ex);
+            Toast.makeText(this, getString(R.string.error_cataloging_hosts),
+                    Toast.LENGTH_LONG).show();
+
+            // Close the application.
+            finish();
         }
     }
 }