add more Java APIs needed for OctoDroid

src/api-impl/android/text/Html.java

@@ -1,6 +1,13 @@
 package android.text;
 
+import android.graphics.drawable.Drawable;
+
 public class Html {
+
+	public static interface ImageGetter {
+		public Drawable getDrawable(String source);
+	}
+
 	public static Spanned fromHtml(String source) {
 		return new SpannableString(source.replace("<br/>", "\n")
 		                                 .replace("<br>", "\n")

src/api-impl/android/text/TextUtils.java

@@ -330,4 +330,12 @@ public class TextUtils {
 	private static Object sLock = new Object();
 
 	private static char[] sTemp = null;
+
+	public static int getTrimmedLength(CharSequence s) {
+		return s.toString().trim().length();
+	}
+
+	public static String htmlEncode(String s) {
+		return s;
+	}
 }

src/api-impl/android/text/format/DateUtils.java

@@ -0,0 +1,12 @@
+package android.text.format;
+
+import java.util.Date;
+
+import android.content.Context;
+
+public class DateUtils {
+
+	public static CharSequence getRelativeTimeSpanString(Context context, long millis, boolean withPreposition) {
+		return new Date(millis).toString();
+	}
+}

src/api-impl/android/text/format/Formatter.java

@@ -5,6 +5,18 @@ import android.content.Context;
 public class Formatter {
 
 	public static String formatShortFileSize(Context context, long size) {
-		return String.valueOf(size);
+		return formatFileSize(context, size);
+	}
+
+	public static String formatFileSize(Context context, long size) {
+		if (size > 1024 * 1024 * 1024) {
+			return String.format("%.1f GiB", size / 1024.0 / 1024.0 / 1024.0);
+		} else if (size > 1024 * 1024) {
+			return String.format("%.1f MiB", size / 1024.0 / 1024.0);
+		} else if (size > 1024) {
+			return String.format("%.1f KiB", size / 1024.0);
+		} else {
+			return String.format("%d B", size);
+		}
 	}
 }

src/api-impl/android/text/style/ImageSpan.java

@@ -4,5 +4,17 @@ import android.graphics.drawable.Drawable;
 
 public class ImageSpan extends DynamicDrawableSpan {
 
-	public ImageSpan(Drawable d) {}
+	private Drawable drawable;
+
+	public ImageSpan(Drawable d) {
+		drawable = d;
+	}
+
+	public ImageSpan(Drawable d, String source) {
+		drawable = d;
+	}
+
+	public Drawable getDrawable() {
+		return drawable;
+	}
 }