node defaults and history (#70)

app/src/main/java/com/m2049r/xmrwallet/LoginFragment.java

@@ -43,8 +43,10 @@ import android.widget.TextView;
 import android.widget.Toast;
 import android.widget.ToggleButton;
 
+import com.m2049r.xmrwallet.layout.InstantAutoComplete;
 import com.m2049r.xmrwallet.model.WalletManager;
 import com.m2049r.xmrwallet.util.Helper;
+import com.m2049r.xmrwallet.util.NodeList;
 
 import java.io.File;
 import java.io.IOException;
@@ -74,7 +76,9 @@ public class LoginFragment extends Fragment {
     List<String> displayedList = new ArrayList<>();
 
     ToggleButton tbMainNet;
-    EditText etDaemonAddress;
+    InstantAutoComplete etDaemonAddress;
+    ArrayAdapter<String> nodeAdapter;
+
     FloatingActionButton fabAdd;
 
     Listener activityCallback;
@@ -139,8 +143,9 @@ public class LoginFragment extends Fragment {
         View view = inflater.inflate(R.layout.login_fragment, container, false);
 
         tbMainNet = (ToggleButton) view.findViewById(R.id.tbMainNet);
-        etDaemonAddress = (EditText) view.findViewById(R.id.etDaemonAddress);
-
+        etDaemonAddress = (InstantAutoComplete) view.findViewById(R.id.etDaemonAddress);
+        nodeAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_dropdown_item_1line);
+        etDaemonAddress.setAdapter(nodeAdapter);
 
         fabAdd = (FloatingActionButton) view.findViewById(R.id.fabAdd);
         fabAdd.setOnClickListener(new View.OnClickListener() {
@@ -281,23 +286,34 @@ public class LoginFragment extends Fragment {
         return etDaemonAddress.getText().toString();
     }
 
-    void setDaemon(String address) {
-        etDaemonAddress.setText(address);
+    void setDaemon(NodeList nodeList) {
+        Log.d(TAG, "setDaemon() " + nodeList.toString());
+        String[] nodes = nodeList.getNodes().toArray(new String[0]);
+        nodeAdapter.clear();
+        nodeAdapter.addAll(nodes);
+        etDaemonAddress.getText().clear();
+        if (nodes.length > 0) {
+            etDaemonAddress.setText(nodes[0]);
+        }
+        etDaemonAddress.dismissDropDown();
     }
 
     private static final String PREF_DAEMON_TESTNET = "daemon_testnet";
     private static final String PREF_DAEMON_MAINNET = "daemon_mainnet";
     private static final String PREF_MAINNET = "mainnet";
 
-    private String daemonTestNet;
-    private String daemonMainNet;
+    private static final String PREF_DAEMONLIST_MAINNET =
+            "node.moneroworld.com:18089;node.xmrbackb.one:18081;node.xmr.be:18081";
+
+    private NodeList daemonTestNet;
+    private NodeList daemonMainNet;
 
     void loadPrefs() {
         SharedPreferences sharedPref = activityCallback.getPrefs();
 
         boolean mainnet = sharedPref.getBoolean(PREF_MAINNET, false);
-        daemonMainNet = sharedPref.getString(PREF_DAEMON_MAINNET, "");
-        daemonTestNet = sharedPref.getString(PREF_DAEMON_TESTNET, "");
+        daemonMainNet = new NodeList(sharedPref.getString(PREF_DAEMON_MAINNET, PREF_DAEMONLIST_MAINNET));
+        daemonTestNet = new NodeList(sharedPref.getString(PREF_DAEMON_TESTNET, ""));
 
         setMainNet(mainnet);
         if (mainnet) {
@@ -316,16 +332,16 @@ public class LoginFragment extends Fragment {
         boolean mainnet = isMainNet() ^ usePreviousState;
         String daemon = getDaemon();
         if (mainnet) {
-            daemonMainNet = daemon;
+            daemonMainNet.setRecent(daemon);
         } else {
-            daemonTestNet = daemon;
+            daemonTestNet.setRecent(daemon);
         }
 
         SharedPreferences sharedPref = activityCallback.getPrefs();
         SharedPreferences.Editor editor = sharedPref.edit();
         editor.putBoolean(PREF_MAINNET, mainnet);
-        editor.putString(PREF_DAEMON_MAINNET, daemonMainNet);
-        editor.putString(PREF_DAEMON_TESTNET, daemonTestNet);
+        editor.putString(PREF_DAEMON_MAINNET, daemonMainNet.toString());
+        editor.putString(PREF_DAEMON_TESTNET, daemonTestNet.toString());
         editor.apply();
     }
 

app/src/main/java/com/m2049r/xmrwallet/layout/InstantAutoComplete.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2017 m2049r
+ *
+ * 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.
+ */
+
+// https://stackoverflow.com/questions/2126717/android-autocompletetextview-show-suggestions-when-no-text-entered
+
+package com.m2049r.xmrwallet.layout;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.support.v7.widget.AppCompatAutoCompleteTextView;
+import android.util.AttributeSet;
+
+public class InstantAutoComplete extends AppCompatAutoCompleteTextView {
+
+    public InstantAutoComplete(Context context) {
+        super(context);
+    }
+
+    public InstantAutoComplete(Context arg0, AttributeSet arg1) {
+        super(arg0, arg1);
+    }
+
+    public InstantAutoComplete(Context arg0, AttributeSet arg1, int arg2) {
+        super(arg0, arg1, arg2);
+    }
+
+    @Override
+    public boolean enoughToFilter() {
+        return true;
+    }
+
+    @Override
+    protected void onFocusChanged(boolean focused, int direction,
+                                  Rect previouslyFocusedRect) {
+        super.onFocusChanged(focused, direction, previouslyFocusedRect);
+        if (focused && getAdapter() != null) {
+            performFiltering(getText(), 0);
+        }
+    }
+
+}

app/src/main/java/com/m2049r/xmrwallet/util/NodeList.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2017 m2049r
+ *
+ * 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.m2049r.xmrwallet.util;
+
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class NodeList {
+    static private final String TAG = "NodeList";
+    static public final int MAX_SIZE = 5;
+
+    List<String> nodes = new ArrayList<>();
+
+    public List<String> getNodes() {
+        return nodes;
+    }
+
+    public void setRecent(String aNode) {
+        if (aNode.trim().isEmpty()) return;
+        boolean found = false;
+        for (int i = 0; i < nodes.size(); i++) {
+            if (nodes.get(i).equals(aNode)) { // node is already in the list => move it to top
+                nodes.remove(i);
+                found = true;
+                break;
+            }
+        }
+        if (!found) {
+            if (nodes.size() > MAX_SIZE) {
+                nodes.remove(nodes.size() - 1); // drop last one
+            }
+        }
+        nodes.add(0, aNode);
+    }
+
+    public NodeList(String aString) {
+        String[] newNodes = aString.split(";");
+        nodes.addAll(Arrays.asList(newNodes));
+    }
+
+    @Override
+    public String toString() {
+        StringBuffer sb = new StringBuffer();
+        for (String node : this.nodes) {
+            sb.append(node).append(";");
+        }
+        return sb.toString();
+    }
+}

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

@@ -19,7 +19,7 @@
             app:layout_constraintRight_toRightOf="parent"
             app:layout_constraintTop_toTopOf="parent" />
 
-        <EditText
+        <com.m2049r.xmrwallet.layout.InstantAutoComplete
             android:id="@+id/etDaemonAddress"
             style="@style/MoneroEdit"
             android:layout_width="0dp"