创建了一个预览页面以及相关的Activity类

src/src/main/java/net/micode/notes/ui/activities/PreviewActivity.java

@@ -0,0 +1,22 @@
+package net.micode.notes.ui.activities;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.widget.TextView;
+
+import com.zzhoujay.richtext.RichText;
+
+import net.micode.notes.R;
+
+public class PreviewActivity extends Activity {
+
+    public static String text;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        RichText.initCacheDir(this.getCacheDir());
+        this.setContentView(R.layout.preview_layout);
+        TextView mdView = (TextView) this.findViewById(R.id.md_view);
+        RichText.fromMarkdown(text).into(mdView);
+    }
+}

src/src/main/res/layout/note_edit.xml

@@ -25,7 +25,6 @@
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:orientation="vertical">
-
         <LinearLayout
             android:id="@+id/note_title"
             android:layout_width="fill_parent"
@@ -113,6 +112,25 @@
                 android:layout_width="fill_parent"
                 android:layout_height="7dip"
                 android:background="@drawable/bg_color_btn_mask" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="50dp"
+                android:orientation="horizontal"
+                android:gravity="center"
+                android:layout_gravity="bottom"
+                android:layout_marginBottom="30dp"
+                >
+                <Button
+                    android:id="@+id/preview_btn"
+                    android:background="@color/btn_color"
+                    android:text="预览模式"
+                    android:textColor="@color/primary_text_dark"
+                    android:layout_marginLeft="0dp"
+                    android:layout_marginRight="0dp"
+                    android:layout_width="200dp"
+                    android:layout_height="50dp"/>
+            </LinearLayout>
         </LinearLayout>
     </LinearLayout>
 

src/src/main/res/layout/preview_layout.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+    <TextView
+        android:id="@+id/md_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        />
+
+</LinearLayout>

src/src/main/res/values/colors.xml

@@ -17,4 +17,5 @@
 
 <resources>
     <color name="user_query_highlight">#335b5b5b</color>
+    <color name="btn_color">#52000000</color>
 </resources>