Proper error page

app/src/main/java/i2p/bote/android/NetworkInfoFragment.java

@@ -1,17 +1,25 @@
 package i2p.bote.android;
 
+import android.content.Context;
 import android.graphics.Color;
+import android.os.Build;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import com.androidplot.pie.PieChart;
 import com.androidplot.pie.Segment;
 import com.androidplot.pie.SegmentFormatter;
 
+import net.i2p.android.ui.I2PAndroidHelper;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.io.StringWriter;
 import java.util.Collection;
 import java.util.List;
 import java.util.Set;
@@ -24,6 +32,8 @@ import i2p.bote.network.RelayPeer;
 import static i2p.bote.Util._;
 
 public class NetworkInfoFragment extends Fragment {
+    private Exception mConnectError;
+
     private PieChart mKademliaPie;
     private TextView mKademliaPeers;
     private PieChart mRelayPie;
@@ -31,29 +41,54 @@ public class NetworkInfoFragment extends Fragment {
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
-            Bundle savedInstanceState) {
-        return inflater.inflate(R.layout.fragment_network_info, container, false);
+                             Bundle savedInstanceState) {
+        mConnectError = I2PBote.getInstance().getConnectError();
+        if (mConnectError == null)
+            return inflater.inflate(R.layout.fragment_network_info, container, false);
+        else
+            return inflater.inflate(R.layout.fragment_network_error, container, false);
     }
 
     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
 
-        mKademliaPie = (PieChart) view.findViewById(R.id.kademlia_peers_pie);
-        mKademliaPeers = (TextView) view.findViewById(R.id.kademlia_peers);
-        mRelayPie = (PieChart) view.findViewById(R.id.relay_peers_pie);
-        mRelayPeers = (TextView) view.findViewById(R.id.relay_peers);
+        if (mConnectError == null) {
+            mKademliaPie = (PieChart) view.findViewById(R.id.kademlia_peers_pie);
+            mKademliaPeers = (TextView) view.findViewById(R.id.kademlia_peers);
+            mRelayPie = (PieChart) view.findViewById(R.id.relay_peers_pie);
+            mRelayPeers = (TextView) view.findViewById(R.id.relay_peers);
 
-        setupKademliaPeers();
-        setupRelayPeers();
+            setupKademliaPeers();
+            setupRelayPeers();
 
-        Collection<BannedPeer> bannedPeers = I2PBote.getInstance().getBannedPeers();
-        ((TextView) view.findViewById(R.id.banned_peers)).setText(
-                "" + bannedPeers.size());
+            Collection<BannedPeer> bannedPeers = I2PBote.getInstance().getBannedPeers();
+            ((TextView) view.findViewById(R.id.banned_peers)).setText(
+                    "" + bannedPeers.size());
+        } else {
+            ((TextView) view.findViewById(R.id.error)).setText(mConnectError.toString());
 
-        Exception e = I2PBote.getInstance().getConnectError();
-        if (e != null)
-            ((TextView) view.findViewById(R.id.error)).setText(e.toString());
+            view.findViewById(R.id.copy_error).setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View view) {
+                    String fullError = joinStackTrace(mConnectError);
+                    Object clipboardService = getActivity().getSystemService(Context.CLIPBOARD_SERVICE);
+                    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB) {
+                        android.text.ClipboardManager clipboard = (android.text.ClipboardManager) clipboardService;
+                        clipboard.setText(fullError);
+                    } else {
+                        android.content.ClipboardManager clipboard = (android.content.ClipboardManager) clipboardService;
+                        android.content.ClipData clip = android.content.ClipData.newPlainText(
+                                getString(R.string.bote_connection_error), fullError);
+                        clipboard.setPrimaryClip(clip);
+                    }
+                    Toast.makeText(getActivity(), R.string.full_error_copied_to_clipboard, Toast.LENGTH_SHORT).show();
+                }
+            });
+
+            if ((new I2PAndroidHelper(getActivity())).isI2PAndroidInstalled())
+                view.findViewById(R.id.error_page_i2p_content).setVisibility(View.VISIBLE);
+        }
     }
 
     private void setupSegmentFormatter(SegmentFormatter sf) {
@@ -165,4 +200,44 @@ public class NetworkInfoFragment extends Fragment {
         mRelayPie.getBorderPaint().setColor(Color.TRANSPARENT);
         mRelayPie.getBackgroundPaint().setColor(Color.TRANSPARENT);
     }
+
+    private static String joinStackTrace(Throwable e) {
+        StringWriter writer = null;
+        try {
+            writer = new StringWriter();
+            joinStackTrace(e, writer);
+            return writer.toString();
+        }
+        finally {
+            if (writer != null)
+                try {
+                    writer.close();
+                } catch (IOException e1) {
+                    // ignore
+                }
+        }
+    }
+
+    private static void joinStackTrace(Throwable e, StringWriter writer) {
+        PrintWriter printer = null;
+        try {
+            printer = new PrintWriter(writer);
+
+            while (e != null) {
+
+                printer.println(e);
+                StackTraceElement[] trace = e.getStackTrace();
+                for (int i = 0; i < trace.length; i++)
+                    printer.println("\tat " + trace[i]);
+
+                e = e.getCause();
+                if (e != null)
+                    printer.println("Caused by:\r\n");
+            }
+        }
+        finally {
+            if (printer != null)
+                printer.close();
+        }
+    }
 }

app/src/main/res/layout/fragment_network_error.xml

@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:paddingBottom="@dimen/activity_vertical_margin"
+        android:paddingLeft="@dimen/activity_horizontal_margin"
+        android:paddingRight="@dimen/activity_horizontal_margin"
+        android:paddingTop="@dimen/activity_vertical_margin">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/connect_error_occurred"
+            android:textAppearance="@style/TextAppearance.AppCompat.Subject"/>
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/this_is_the_error"
+            android:textAppearance="@style/TextAppearance.AppCompat.Primary"/>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:gravity="center_vertical"
+            android:orientation="horizontal">
+
+            <TextView
+                android:id="@+id/error"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:textAppearance="@style/TextAppearance.AppCompat.Secondary"/>
+
+            <View
+                style="@style/Divider.Vertical"
+                android:layout_marginEnd="8dp"
+                android:layout_marginLeft="8dp"
+                android:layout_marginRight="8dp"
+                android:layout_marginStart="8dp"/>
+
+            <ImageView
+                android:id="@+id/copy_error"
+                android:layout_width="@dimen/listitem_picture_size"
+                android:layout_height="match_parent"
+                android:minHeight="@dimen/listitem_picture_size"
+                android:scaleType="center"
+                android:src="@drawable/ic_content_copy_grey600_24dp"/>
+        </LinearLayout>
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/most_errors_fixed_on_restart"
+            android:textAppearance="@style/TextAppearance.AppCompat.Primary"/>
+
+        <TextView
+            android:id="@+id/error_page_i2p_content"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/also_check_i2p_android"
+            android:textAppearance="@style/TextAppearance.AppCompat.Primary"
+            android:visibility="gone"/>
+
+    </LinearLayout>
+</ScrollView>

app/src/main/res/layout/fragment_network_info.xml

@@ -78,11 +78,5 @@
             android:text="0"
             android:textAppearance="@style/TextAppearance.AppCompat.Primary"/>
 
-        <TextView
-            android:id="@+id/error"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginTop="8dp"/>
-
     </LinearLayout>
 </ScrollView>

app/src/main/res/values/strings.xml

@@ -152,6 +152,12 @@
     <string name="unreliable">Unreliable</string>
     <string name="untested">Untested</string>
     <string name="banned_peers">Banned Peers:</string>
+    <string name="connect_error_occurred">Oh dear! Bote couldn\'t connect to the network.</string>
+    <string name="this_is_the_error">This is the error that happened:</string>
+    <string name="most_errors_fixed_on_restart">You can fix most problems by restarting Bote. To do this, go back to the main Bote page, then click "Disconnect from network" in the menu, and then click "Connect to network" in the menu again.</string>
+    <string name="also_check_i2p_android">If that doesn\'t help, check that I2P is running. You can see I2P\'s current status in the notification drawer, or by opening the I2P app. If it isn\'t running properly, restart I2P (in the app, click "Stop", and then click "Start" when it appears). Wait for I2P to be fully running, and then star Bote.</string>
+    <string name="bote_connection_error">Bote connection error</string>
+    <string name="full_error_copied_to_clipboard">Full error copied to clipboard</string>
     <string name="pref_title_general">General</string>
     <string name="pref_summ_general">General settings and default identity settings</string>
     <string name="pref_title_autoMail">Auto-check mail</string>