Initial Contribution
diff --git a/src/com/android/contacts/DialtactsActivity.java b/src/com/android/contacts/DialtactsActivity.java
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+++ b/src/com/android/contacts/DialtactsActivity.java
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+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.contacts;
+
+import android.app.TabActivity;
+import android.content.Intent;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.provider.Contacts;
+import android.provider.CallLog.Calls;
+import android.provider.Contacts.Intents.UI;
+import android.util.Log;
+import android.view.KeyEvent;
+import android.view.Window;
+import android.widget.TabHost;
+import com.android.internal.telephony.ITelephony;
+
+/**
+ * The dialer activity that has one tab with the virtual 12key dialer,
+ * and another tab with recent calls in it. This is the container and the tabs
+ * are embedded using intents.
+ */
+public class DialtactsActivity extends TabActivity {
+    private static final String TAG = "Dailtacts";
+
+    public static final String EXTRA_IGNORE_STATE = "ignore-state";
+
+    private static final int FAVORITES_STARRED = 1;
+    private static final int FAVORITES_FREQUENT = 2;
+    private static final int FAVORITES_STREQUENT = 3;
+    
+    /** Defines what is displayed in the right tab */
+    private static final int FAVORITES_TAB_MODE = FAVORITES_STREQUENT;
+
+    protected TabHost mTabHost;
+    
+    private String mFilterText;
+    
+    private Uri mDialUri;
+
+    @Override
+    protected void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        final Intent intent = getIntent();
+        fixIntent(intent);
+        
+        requestWindowFeature(Window.FEATURE_NO_TITLE);
+        setContentView(R.layout.dialer_activity);
+
+        mTabHost = getTabHost();
+
+        // Setup the tabs
+        setupDialerTab();
+        setupCallLogTab();
+        setupContactsTab();
+        setupFavoritesTab();
+
+        setCurrentTab(intent);
+        
+        if (intent.getAction().equals(Contacts.Intents.UI.FILTER_CONTACTS_ACTION) 
+                && icicle == null) {
+            setupFilterText(intent);
+        }
+    }
+
+    private void fixIntent(Intent intent) {
+        // This should be cleaned up: the call key used to send an Intent
+        // that just said to go to the recent calls list.  It now sends this
+        // abstract action, but this class hasn't been rewritten to deal with it.
+        if (Intent.ACTION_CALL_BUTTON.equals(intent.getAction())) {
+            intent.setDataAndType(Calls.CONTENT_URI, Calls.CONTENT_TYPE);
+            intent.putExtra("call_key", true);
+            setIntent(intent);
+        }
+    }
+    
+    private void setupCallLogTab() {
+        mTabHost.addTab(mTabHost.newTabSpec("call_log")
+                .setIndicator(getString(R.string.recentCallsIconLabel),
+                        getResources().getDrawable(R.drawable.ic_tab_recent))
+                .setContent(new Intent("com.android.phone.action.RECENT_CALLS")));
+    }
+
+    private void setupDialerTab() {
+        mTabHost.addTab(mTabHost.newTabSpec("dialer")
+                .setIndicator(getString(R.string.dialerIconLabel),
+                        getResources().getDrawable(R.drawable.ic_tab_dialer))
+                .setContent(new Intent("com.android.phone.action.TOUCH_DIALER")));
+    }
+
+    private void setupContactsTab() {
+        mTabHost.addTab(mTabHost.newTabSpec("contacts")
+                .setIndicator(getText(R.string.contactsIconLabel),
+                        getResources().getDrawable(R.drawable.ic_tab_contacts))
+                .setContent(new Intent(UI.LIST_DEFAULT)));
+    }
+
+    private void setupFavoritesTab() {
+        Intent tab2Intent;
+        switch (FAVORITES_TAB_MODE) {
+            case FAVORITES_STARRED:
+                tab2Intent = new Intent(UI.LIST_STARRED_ACTION);
+                break;
+
+            case FAVORITES_FREQUENT:
+                tab2Intent = new Intent(UI.LIST_FREQUENT_ACTION);
+                break;
+
+            case FAVORITES_STREQUENT:
+                tab2Intent = new Intent(UI.LIST_STREQUENT_ACTION);
+                break;
+
+            default:
+                throw new UnsupportedOperationException("unknown default mode");
+        }
+        Drawable tab2Icon = getResources().getDrawable(R.drawable.ic_tab_starred);
+
+        mTabHost.addTab(mTabHost.newTabSpec("favorites")
+                .setIndicator(getString(R.string.contactsFavoritesLabel), tab2Icon)
+                .setContent(tab2Intent));
+    }
+
+    /**
+     * Returns true if the intent is due to hitting the green send key while in a call.
+     * 
+     * @param intent the intent that launched this activity
+     * @param recentCallsRequest true if the intent is requesting to view recent calls
+     * @return true if the intent is due to hitting the green send key while in a call 
+     */
+    private boolean isSendKeyWhileInCall(final Intent intent, final boolean recentCallsRequest) {
+        // If there is a call in progress go to the call screen
+        if (recentCallsRequest) {
+            final boolean callKey = intent.getBooleanExtra("call_key", false);
+
+            try {
+                ITelephony phone = ITelephony.Stub.asInterface(ServiceManager.checkService("phone"));
+                if (callKey && phone != null && phone.showCallScreen()) {
+                    return true;
+                }
+            } catch (RemoteException e) {
+                Log.e(TAG, "Failed to handle send while in call", e);
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Sets the current tab based on the intent's request type
+     * 
+     * @param recentCallsRequest true is the recent calls tab is desired, false oltherwise
+     */
+    private void setCurrentTab(Intent intent) {
+        final boolean recentCallsRequest = Calls.CONTENT_TYPE.equals(intent.getType());
+        if (isSendKeyWhileInCall(intent, recentCallsRequest)) {
+            finish();
+            return;
+        }
+        intent.putExtra(EXTRA_IGNORE_STATE, true);
+        if (intent.getComponent().getClassName().equals(getClass().getName())) {
+            if (recentCallsRequest) {
+                mTabHost.setCurrentTab(1);
+            } else {
+                mTabHost.setCurrentTab(0);
+            }
+        } else {
+            mTabHost.setCurrentTab(2);
+        }
+        intent.putExtra(EXTRA_IGNORE_STATE, false);
+    }
+
+    @Override
+    public void onNewIntent(Intent newIntent) {
+        setIntent(newIntent);
+        fixIntent(newIntent);
+        setCurrentTab(newIntent);
+        final String action = newIntent.getAction();
+        if (action.equals(Contacts.Intents.UI.FILTER_CONTACTS_ACTION)) {
+            setupFilterText(newIntent);
+        } else if (isDialIntent(newIntent)) {
+            setupDialUri(newIntent);
+        }
+    }
+    
+    private boolean isDialIntent(Intent intent) {
+        final String action = intent.getAction();
+        if (Intent.ACTION_DIAL.equals(action)) {
+            return true;
+        }
+        if (Intent.ACTION_VIEW.equals(action)) {
+            final Uri data = intent.getData();
+            if (data != null && "tel".equals(data.getScheme())) {
+                return true;
+            }
+        }
+        return false;
+    }
+    
+    /**
+     * Retrieves the filter text stored in {@link #setupFilterText(Intent)}.
+     * This text originally came from a FILTER_CONTACTS_ACTION intent received
+     * by this activity. The stored text will then be cleared after after this
+     * method returns.
+     * 
+     * @return The stored filter text
+     */
+    public String getAndClearFilterText() {
+        String filterText = mFilterText;
+        mFilterText = null;
+        return filterText;
+    }
+
+    /**
+     * Stores the filter text associated with a FILTER_CONTACTS_ACTION intent.
+     * This is so child activities can check if they are supposed to display a filter.
+     * 
+     * @param intent The intent received in {@link #onNewIntent(Intent)}
+     */
+    private void setupFilterText(Intent intent) {
+        // If the intent was relaunched from history, don't apply the filter text.
+        if ((intent.getFlags() & Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY) != 0) {
+            return;
+        }
+        String filter = intent.getStringExtra(Contacts.Intents.UI.FILTER_TEXT_EXTRA_KEY);
+        if (filter != null && filter.length() > 0) {
+            mFilterText = filter;
+        }
+    }
+
+    /**
+     * Retrieves the uri stored in {@link #setupDialUri(Intent)}. This uri
+     * originally came from a dial intent received by this activity. The stored
+     * uri will then be cleared after after this method returns.
+     * 
+     * @return The stored uri
+     */
+    public Uri getAndClearDialUri() {
+        Uri dialUri = mDialUri;
+        mDialUri = null;
+        return dialUri;
+    }
+
+    /**
+     * Stores the uri associated with a dial intent. This is so child activities can
+     * check if they are supposed to display new dial info.
+     * 
+     * @param intent The intent received in {@link #onNewIntent(Intent)}
+     */
+    private void setupDialUri(Intent intent) {
+        // If the intent was relaunched from history, don't reapply the intent.
+        if ((intent.getFlags() & Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY) != 0) {
+            return;
+        }
+        mDialUri = intent.getData();
+    }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        // Handle BACK
+        if (keyCode == KeyEvent.KEYCODE_BACK && isTaskRoot()) {
+            // Instead of stopping, simply push this to the back of the stack.
+            // This is only done when running at the top of the stack;
+            // otherwise, we have been launched by someone else so need to
+            // allow the user to go back to the caller.
+            moveTaskToBack(false);
+            return true;
+        }
+        
+        return super.onKeyDown(keyCode, event);
+    }
+}