add wizard for sending FDroid to another device via WiFi/QR

This is a little helper to direct people to get a new device to download
FDroid from another device that already has it.  It first prompts them to
join the same wifi network, and offers a QR Code to associate to the same
wifi.  The next step is a QR Code for getting the URL to the local repo.
The index.html on that local repo includes a download link for FDroid and
a repo link to the local repo.

refs #3204 https://dev.guardianproject.info/issues/3204

AndroidManifest.xml

@@ -182,6 +182,8 @@
         <activity
             android:name=".NfcNotEnabledActivity"
             android:noHistory="true" />
+        <activity android:name=".views.QrWizardDownloadActivity" />
+        <activity android:name=".views.QrWizardWifiNetworkActivity" />
         <activity
             android:name=".views.LocalRepoActivity"
             android:configChanges="orientation|keyboardHidden|screenSize"

res/layout/qr_wizard_activity.xml

@@ -0,0 +1,43 @@
+<?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:id="@+id/qrWizardInstructions"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" >
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:text="@string/wifi_network" />
+
+        <TextView
+            android:id="@+id/qrWifiNetworkName"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:layout_marginLeft="15dp"
+            android:textAppearance="?android:attr/textAppearanceMedium"
+            android:textStyle="bold"
+            android:typeface="monospace" />
+    </LinearLayout>
+
+    <ImageView
+        android:id="@+id/qrWizardImage"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:contentDescription="@string/qr_code" />
+
+    <Button
+        android:id="@+id/qrNextButton"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/next" />
+
+</LinearLayout>

res/menu/local_repo_activity.xml

@@ -5,7 +5,12 @@
         android:id="@+id/menu_setup_repo"
         android:icon="@android:drawable/ic_input_add"
         android:showAsAction="ifRoom|withText"
-        android:title="Setup Repo"/>
+        android:title="@string/setup_repo"/>
+    <item
+        android:id="@+id/menu_send_fdroid_via_wifi"
+        android:icon="@android:drawable/arrow_up_float"
+        android:showAsAction="never"
+        android:title="@string/send_fdroid_via_wifi"/>
     <item
         android:id="@+id/menu_settings"
         android:icon="@android:drawable/ic_menu_preferences"

res/values/strings.xml

@@ -154,6 +154,7 @@
 	<string name="local_repos_title">Local FDroid Repos</string>
 	<string name="local_repos_scanning">Discovering local FDroid repos&#8230;</string>
 	<string name="local_repo_running">Your local FDroid repo is accessible.</string>
+	<string name="setup_repo">Setup Local Repo</string>
 	<string name="touch_to_configure_local_repo">Touch to setup your local repo.</string>
 	<string name="updating">Updating&#8230;</string>
 	<string name="deleting_repo">Deleting current repo&#8230;</string>
@@ -167,7 +168,12 @@
 	<string name="enable_wifi">Enable WiFi</string>
 	<string name="enabling_wifi">Enabling WiFi&#8230;</string>
 	<string name="same_wifi_instructions">To connect to other people\'s devices, make sure both devices are on the same WiFi network.  Then either type the URL above into F-Droid, or scan this QR Code:</string>
+	<string name="qr_code">QR Code</string>
+	<string name="next">Next</string>
 	<string name="qr_content_description">QR Code of repo URL</string>
+	<string name="qr_wizard_wifi_network_instructions">Scan this QR Code to connect to the same WiFi network as this device.</string>
+	<string name="qr_wizard_download_instructions">Scan this QR Code to connect to the website for getting started.</string>
+	<string name="send_fdroid_via_wifi">Send FDroid via WiFi&#8230;</string>
 
 	<!--
 	status_download takes four parameters:

src/org/fdroid/fdroid/views/LocalRepoActivity.java

@@ -112,6 +112,9 @@ public class LocalRepoActivity extends Activity {
                 packages[1] = "com.android.bluetooth";
                 new UpdateAsyncTask(this, packages).execute();
                 return true;
+            case R.id.menu_send_fdroid_via_wifi:
+                startActivity(new Intent(this, QrWizardWifiNetworkActivity.class));
+                return true;
             case R.id.menu_settings:
                 startActivityForResult(new Intent(this, PreferencesActivity.class), SET_IP_ADDRESS);
                 return true;

src/org/fdroid/fdroid/views/QrWizardDownloadActivity.java

@@ -0,0 +1,82 @@
+
+package org.fdroid.fdroid.views;
+
+import android.app.Activity;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.support.v4.content.LocalBroadcastManager;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.TextView;
+
+import org.fdroid.fdroid.FDroidApp;
+import org.fdroid.fdroid.QrGenAsyncTask;
+import org.fdroid.fdroid.R;
+import org.fdroid.fdroid.net.WifiStateChangeService;
+
+public class QrWizardDownloadActivity extends Activity {
+    private static final String TAG = "QrWizardDownloadActivity";
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.qr_wizard_activity);
+        TextView instructions = (TextView) findViewById(R.id.qrWizardInstructions);
+        instructions.setText(R.string.qr_wizard_download_instructions);
+        Button next = (Button) findViewById(R.id.qrNextButton);
+        next.setOnClickListener(new OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                setResult(RESULT_OK);
+                finish();
+            }
+        });
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        resetNetworkInfo();
+        LocalBroadcastManager.getInstance(this).registerReceiver(onWifiChange,
+                new IntentFilter(WifiStateChangeService.BROADCAST));
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        LocalBroadcastManager.getInstance(this).unregisterReceiver(onWifiChange);
+    }
+
+    private BroadcastReceiver onWifiChange = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent i) {
+            Log.i(TAG, "onWifiChange.onReceive()");
+            resetNetworkInfo();
+        }
+    };
+
+    private void resetNetworkInfo() {
+        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
+        String qrString = "";
+        if (prefs.getBoolean("use_https", false))
+            qrString += "https";
+        else
+            qrString += "http";
+        qrString += "://" + FDroidApp.ipAddressString;
+        qrString += ":" + FDroidApp.port;
+
+        new QrGenAsyncTask(this, R.id.qrWizardImage).execute(qrString);
+        Log.i(TAG, "qr: " + qrString);
+
+        TextView wifiNetworkName = (TextView) findViewById(R.id.qrWifiNetworkName);
+        wifiNetworkName.setText(qrString.replaceFirst("http://", ""));
+    }
+}

src/org/fdroid/fdroid/views/QrWizardWifiNetworkActivity.java

@@ -0,0 +1,110 @@
+
+package org.fdroid.fdroid.views;
+
+import android.app.Activity;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.wifi.WifiInfo;
+import android.net.wifi.WifiManager;
+import android.os.Bundle;
+import android.support.v4.content.LocalBroadcastManager;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.TextView;
+
+import org.fdroid.fdroid.FDroidApp;
+import org.fdroid.fdroid.QrGenAsyncTask;
+import org.fdroid.fdroid.R;
+import org.fdroid.fdroid.net.WifiStateChangeService;
+
+public class QrWizardWifiNetworkActivity extends Activity {
+    private static final String TAG = "QrWizardWifiNetworkActivity";
+
+    private WifiManager wifiManager;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
+        wifiManager.setWifiEnabled(true);
+        FDroidApp.startLocalRepoService(this);
+
+        setContentView(R.layout.qr_wizard_activity);
+        TextView instructions = (TextView) findViewById(R.id.qrWizardInstructions);
+        instructions.setText(R.string.qr_wizard_wifi_network_instructions);
+        Button next = (Button) findViewById(R.id.qrNextButton);
+        next.setOnClickListener(new OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                Intent intent = new Intent(getBaseContext(), QrWizardDownloadActivity.class);
+                startActivityForResult(intent, 0);
+                finish();
+            }
+        });
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        resetNetworkInfo();
+        LocalBroadcastManager.getInstance(this).registerReceiver(onWifiChange,
+                new IntentFilter(WifiStateChangeService.BROADCAST));
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        LocalBroadcastManager.getInstance(this).unregisterReceiver(onWifiChange);
+    }
+
+    private BroadcastReceiver onWifiChange = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent i) {
+            Log.i(TAG, "onWifiChange.onReceive()");
+            resetNetworkInfo();
+        }
+    };
+
+    private void resetNetworkInfo() {
+        int wifiState = wifiManager.getWifiState();
+        if (wifiState == WifiManager.WIFI_STATE_ENABLED) {
+            WifiInfo wifiInfo = wifiManager.getConnectionInfo();
+            // http://zxing.appspot.com/generator/
+            // WIFI:S:openwireless.org;; // no pw
+            // WIFI:S:openwireless.org;T:WPA;;
+            // WIFI:S:openwireless.org;T:WEP;;
+            // WIFI:S:openwireless.org;H:true;; // hidden
+            // WIFI:S:openwireless.org;T:WPA;H:true;; // all
+            String qrString = "WIFI:S:";
+            qrString += wifiInfo.getSSID();
+            // TODO get encryption state (none, WEP, WPA)
+            /*
+             * WifiConfiguration wc = null; for (WifiConfiguration i :
+             * wifiManager.getConfiguredNetworks()) { if (i.status ==
+             * WifiConfiguration.Status.CURRENT) { wc = i; break; } } if (wc !=
+             * null)
+             */
+            if (wifiInfo.getHiddenSSID())
+                qrString += ";H:true";
+            qrString += ";;";
+            new QrGenAsyncTask(this, R.id.qrWizardImage).execute(qrString);
+            Log.i(TAG, "qr: " + qrString);
+
+            TextView wifiNetworkName = (TextView) findViewById(R.id.qrWifiNetworkName);
+            wifiNetworkName.setText(wifiInfo.getSSID());
+            Log.i(TAG, "wifi network name: " + wifiInfo.getSSID());
+        }
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        // this wizard is done, clear this Activity from the history
+        if (resultCode == RESULT_OK)
+            finish();
+    }
+}