Merge pull request '修了一个bug' (#4) from dingzijian_branch into develop

src/Notes-master/java/net/micode/notes/ui/NotesListActivity.java

@@ -172,17 +172,22 @@ public class NotesListActivity extends AppCompatActivity implements OnClickListe
         super.onCreate(savedInstanceState);
         setContentView(layout.note_list);
 
-        Drawable drawable= getResources().getDrawable(list_background);
-        BitmapDrawable bd = (BitmapDrawable) drawable;
-        Bitmap b = bd.getBitmap();
-        File path = new File(getCacheDir() + "/SampleCropImage.jpeg");
-        try {
-            OutputStream os = new FileOutputStream(path);
-            b.compress(Bitmap.CompressFormat.JPEG, 100, os);
-            os.close();
-        } catch (Exception ignored) {
+        SharedPreferences sharedPreferences=getSharedPreferences("data1", Context.MODE_WORLD_READABLE);
+        if(!sharedPreferences.contains("DEFAULT"))
+        {
+            Drawable drawable= getResources().getDrawable(list_background);
+            BitmapDrawable bd = (BitmapDrawable) drawable;
+            Bitmap b = bd.getBitmap();
+            File path = new File(getCacheDir() + "/SampleCropImage.jpeg");
+            try {
+                OutputStream os = new FileOutputStream(path);
+                b.compress(Bitmap.CompressFormat.JPEG, 100, os);
+                os.close();
+            } catch (Exception ignored) {
+            }
         }
 
+
         initResources();
 
         /**