Added widget to display the unread count for an account

AndroidManifest.xml

@@ -391,5 +391,25 @@ otherwise it would make K-9 start at the wrong time
             android:readPermission="com.fsck.k9.permission.READ_MESSAGES"
             android:writePermission="com.fsck.k9.permission.DELETE_MESSAGES"
             />
+
+        <receiver
+            android:name=".provider.UnreadWidgetProvider"
+            android:label="@string/unread_widget_label"
+            android:icon="@drawable/icon">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/unread_widget_info" />
+        </receiver>
+        <activity android:name=".activity.UnreadWidgetConfiguration">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".activity.AccountList">
+        </activity>
     </application>
 </manifest>

res/drawable/rounded_corners.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <solid android:color="#a0000000"/>
+    <corners android:radius="7dp"/>
+
+</shape>

res/drawable/unread_count_background.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <solid android:color="#ffcc0000"/>
+    <corners android:radius="17dp"/>
+
+</shape>

res/layout/account_list.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_height="fill_parent"
+    android:layout_width="fill_parent">
+
+    <ListView
+        android:id="@android:id/list"
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent"/>
+
+    <LinearLayout
+        android:id="@android:id/empty"
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent"
+        android:orientation="vertical"
+        android:gravity="center_vertical|center_horizontal">
+
+        <ProgressBar
+            style="?android:attr/progressBarStyleLarge"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:indeterminate="true"/>
+
+    </LinearLayout>
+</LinearLayout>

res/layout/unread_widget_layout.xml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/unread_widget_layout"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:padding="2dp"
+    android:orientation="vertical"
+    android:gravity="bottom|center_horizontal">
+
+    <FrameLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content">
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:src="@drawable/icon" />
+
+        <TextView
+            android:id="@+id/unread_count"
+            android:textSize="10sp"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="right|bottom"
+            android:paddingTop="0.5dp"
+            android:paddingBottom="0.5dp"
+            android:paddingLeft="5dp"
+            android:paddingRight="5dp"
+            android:background="@drawable/unread_count_background"
+            android:textColor="#ffffff"/>
+
+    </FrameLayout>
+
+    <TextView
+        android:id="@+id/account_name"
+        android:ellipsize="none"
+        android:textSize="11sp"
+        android:shadowColor="#000000"
+        android:singleLine="true"
+        android:paddingTop="1dp"
+        android:paddingBottom="1dp"
+        android:paddingLeft="4dp"
+        android:paddingRight="4dp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_horizontal"
+        android:layout_marginTop="2dp"
+        android:background="@drawable/rounded_corners"
+        android:textColor="#ffffff"/>
+
+</LinearLayout>

res/values/strings.xml

@@ -1126,4 +1126,6 @@ Welcome to K-9 Mail setup.  K-9 is an open source mail client for Android origin
     <string name="manage_accounts_move_down_action">Move down</string>
     <string name="manage_accounts_moving_message">Moving account...</string>
 
+    <string name="unread_widget_label">Unread count</string>
+    <string name="unread_widget_select_account">Show unread count for…</string>
 </resources>

res/xml/unread_widget_info.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:initialLayout="@layout/unread_widget_layout"
+    android:minHeight="40dp"
+    android:minWidth="40dp"
+    android:configure="com.fsck.k9.activity.UnreadWidgetConfiguration"
+    android:updatePeriodMillis="0">
+</appwidget-provider>

src/com/fsck/k9/activity/AccountList.java

@@ -0,0 +1,163 @@
+package com.fsck.k9.activity;
+
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.util.TypedValue;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+import android.widget.TextView;
+
+import com.fsck.k9.Account;
+import com.fsck.k9.FontSizes;
+import com.fsck.k9.K9;
+import com.fsck.k9.Preferences;
+import com.fsck.k9.R;
+
+
+/**
+ * Activity displaying the list of accounts.
+ *
+ * <p>
+ * Classes extending this abstract class have to provide an {@link #onAccountSelected(Account)}
+ * method to perform an action when an account is selected.
+ * </p>
+ */
+public abstract class AccountList extends K9ListActivity implements OnItemClickListener {
+    private FontSizes mFontSizes = K9.getFontSizes();
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        setResult(RESULT_CANCELED);
+
+        setContentView(R.layout.account_list);
+
+        ListView listView = getListView();
+        listView.setOnItemClickListener(this);
+        listView.setItemsCanFocus(false);
+    }
+
+    /**
+     * Reload list of accounts when this activity is resumed.
+     */
+    @Override
+    public void onResume() {
+        super.onResume();
+        new LoadAccounts().execute();
+    }
+
+    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+        Account account = (Account) parent.getItemAtPosition(position);
+        onAccountSelected(account);
+    }
+
+    /**
+     * Create a new {@link AccountsAdapter} instance and assign it to the {@link ListView}.
+     *
+     * @param accounts
+     *         An array of accounts to display.
+     */
+    public void populateListView(Account[] accounts) {
+        AccountsAdapter adapter = new AccountsAdapter(accounts);
+        ListView listView = getListView();
+        listView.setAdapter(adapter);
+        listView.invalidate();
+    }
+
+    /**
+     * This method will be called when an account was selected.
+     *
+     * @param account
+     *         The account the user selected.
+     */
+    protected abstract void onAccountSelected(Account account);
+
+    class AccountsAdapter extends ArrayAdapter<Account> {
+        private Account[] mAccounts;
+
+        public AccountsAdapter(Account[] accounts) {
+            super(AccountList.this, 0, accounts);
+            mAccounts = accounts;
+        }
+
+        public Account[] getAccounts() {
+            return mAccounts;
+        }
+
+        @Override
+        public View getView(int position, View convertView, ViewGroup parent) {
+            final Account account = getItem(position);
+
+            final View view;
+            if (convertView != null) {
+                view = convertView;
+            } else {
+                view = getLayoutInflater().inflate(R.layout.accounts_item, parent, false);
+                view.findViewById(R.id.active_icons).setVisibility(View.GONE);
+                view.findViewById(R.id.folders).setVisibility(View.GONE);
+                view.getBackground().setAlpha(0);
+            }
+
+            AccountViewHolder holder = (AccountViewHolder) view.getTag();
+            if (holder == null) {
+                holder = new AccountViewHolder();
+                holder.description = (TextView) view.findViewById(R.id.description);
+                holder.email = (TextView) view.findViewById(R.id.email);
+                holder.chip = view.findViewById(R.id.chip);
+
+                view.setTag(holder);
+            }
+
+            String description = account.getDescription();
+            if (account.getEmail().equals(description)) {
+                holder.email.setVisibility(View.GONE);
+            } else {
+                holder.email.setVisibility(View.VISIBLE);
+                holder.email.setText(account.getEmail());
+            }
+
+            if (description == null || description.length() == 0) {
+                description = account.getEmail();
+            }
+
+            holder.description.setText(description);
+
+            holder.chip.setBackgroundColor(account.getChipColor());
+            holder.chip.getBackground().setAlpha(255);
+
+            holder.description.setTextSize(TypedValue.COMPLEX_UNIT_SP,
+                    mFontSizes.getAccountName());
+            holder.email.setTextSize(TypedValue.COMPLEX_UNIT_SP,
+                    mFontSizes.getAccountDescription());
+
+            return view;
+        }
+
+        class AccountViewHolder {
+            public TextView description;
+            public TextView email;
+            public View chip;
+        }
+    }
+
+    /**
+     * Load accounts in a background thread
+     */
+    class LoadAccounts extends AsyncTask<Void, Void, Account[]> {
+        @Override
+        protected Account[] doInBackground(Void... params) {
+            Account[] accounts = Preferences.getPreferences(getApplicationContext()).getAccounts();
+            return accounts;
+        }
+
+        @Override
+        protected void onPostExecute(Account[] accounts) {
+            populateListView(accounts);
+        }
+    }
+}

src/com/fsck/k9/activity/LauncherShortcuts.java

@@ -40,7 +40,7 @@ public void onCreate(Bundle icicle) {
             return;
         }
 
-        setContentView(R.layout.launcher_shortcuts);
+        setContentView(R.layout.account_list);
         ListView listView = getListView();
         listView.setOnItemClickListener(this);
         listView.setItemsCanFocus(false);