[android] Convenience logging utils.

android/src/com/mapswithme/util/log/Logger.java

@@ -0,0 +1,19 @@
+package com.mapswithme.util.log;
+
+public abstract class Logger
+{
+  protected String tag = "MAPSWITHME";
+
+  protected Logger() {}
+
+  protected Logger(String tag)
+  {
+    this.tag = tag;
+  }
+
+  public abstract void d(String message);
+  public abstract void e(String message);
+
+  public abstract void d(String message, Object ... args);
+  public abstract void e(String message, Object ... args);
+}

android/src/com/mapswithme/util/log/SimpleLogger.java

@@ -0,0 +1,47 @@
+package com.mapswithme.util.log;
+
+import android.util.Log;
+
+public class SimpleLogger extends Logger
+{
+  public static SimpleLogger get() { return new SimpleLogger(); }
+  public static SimpleLogger get(String tag) { return new SimpleLogger(tag); }
+
+  @Override
+  public void d(String message)
+  {
+    d(message, (Object[])null);
+  }
+
+  @Override
+  public void e(String message)
+  {
+    e(message, (Object[])null);
+  }
+
+  @Override
+  public void d(String message, Object... args)
+  {
+    Log.d(tag, message + join(args));
+  }
+
+  @Override
+  public void e(String message, Object... args)
+  {
+    Log.e(tag, message + join(args));
+  }
+
+  private static String join(Object ... args)
+  {
+    final StringBuilder sb = new StringBuilder(" (");
+    if (args != null)
+    {
+      for (Object o : args)
+        sb.append(o).append(',');
+    }
+    return sb.toString() + ")";
+  }
+
+  private SimpleLogger() {};
+  private SimpleLogger(String tag) { super(tag); };
+}

android/src/com/mapswithme/util/log/StubLogger.java

@@ -0,0 +1,28 @@
+package com.mapswithme.util.log;
+
+public class StubLogger extends Logger
+{
+
+  @Override
+  public void d(String message)
+  {
+  }
+
+  @Override
+  public void e(String message)
+  {
+  }
+
+  @Override
+  public void d(String message, Object... args)
+  {
+  }
+
+  @Override
+  public void e(String message, Object... args)
+  {
+  }
+
+  public static StubLogger get() { return new StubLogger(); }
+
+}