log update handler

src/net/i2p/android/router/activity/LogActivity.java

@@ -3,6 +3,7 @@ package net.i2p.android.router.activity;
 import android.app.ListActivity;
 import android.content.Intent;
 import android.os.Bundle;
+import android.os.Handler;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
@@ -18,8 +19,13 @@ import net.i2p.android.router.R;
 public class LogActivity extends ListActivity {
 
     boolean errorsOnly;
+    private Handler _handler;
+    private Runnable _updater;
+    private ArrayAdapter<String> _adap;
+    private TextView _headerView;
 
     final static String ERRORS_ONLY = "errors_only";
+    private static final int MAX = 250;
 
     @Override
     public void onCreate(Bundle savedInstanceState)
@@ -54,17 +60,85 @@ public class LogActivity extends ListActivity {
         }
 
         // set the header
-        TextView tv = (TextView) getLayoutInflater().inflate(R.layout.logs_header, null);
-        tv.setText(header);
+        _headerView = (TextView) getLayoutInflater().inflate(R.layout.logs_header, null);
+        _headerView.setText(header);
         ListView lv = getListView();
-        lv.addHeaderView(tv, "", false);
-        setListAdapter(new ArrayAdapter<String>(this, R.layout.logs_list_item, msgs));
+        lv.addHeaderView(_headerView, "", false);
+        _adap = new ArrayAdapter<String>(this, R.layout.logs_list_item, msgs);
+        setListAdapter(_adap);
 
+/***
         // set the callback
         lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
             public void onItemClick(AdapterView parent, View view, int pos, long id) {
                 // make it bigger or something
             }
         });
+***/
+
+        _handler = new Handler();
+        _updater = new Updater();
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        _handler.removeCallbacks(_updater);
+        _handler.postDelayed(_updater, 2500);
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        _handler.removeCallbacks(_updater);
     }
+
+    private class Updater implements Runnable {
+        private int counter;
+
+        public void run() {
+            I2PAppContext ctx = I2PAppContext.getCurrentContext();
+            if (ctx != null) {
+                List<String> msgs;
+                if (errorsOnly) {
+                    msgs = ctx.logManager().getBuffer().getMostRecentCriticalMessages();
+                } else {
+                    msgs = ctx.logManager().getBuffer().getMostRecentMessages();
+                }
+		int sz = msgs.size();
+                if (sz > 0) {
+                    Collections.reverse(msgs);
+                    String oldNewest = _adap.getCount() > 0 ? _adap.getItem(0) : null;
+                    boolean changed = false;
+                    for (int i = 0; i < sz; i++) {
+                        String newItem = msgs.get(i);
+                        if (newItem.equals(oldNewest))
+                            break;
+                        _adap.insert(newItem, i);
+                        changed = true;
+                    }
+                    int newSz = _adap.getCount();
+                    for (int i = newSz - 1; i > MAX; i--) {
+                        _adap.remove(_adap.getItem(i));
+                    }
+                    if (changed) {
+                        // fixme update header
+                        newSz = _adap.getCount();
+                        String header;
+                        if (newSz == 0) {
+                            header = "No messages";
+                        } else if (newSz == 1) {
+                            header = "1 message";
+                        } else {
+                            header = sz + " messages, newest first";
+                        }
+                        _headerView.setText(header);
+                        _adap.notifyDataSetChanged();
+                    }
+                }
+            }
+            _handler.postDelayed(this, 1500);
+        }
+    }
+
 }