use home button to return from preferences

app/src/main/java/com/zeapo/pwdstore/PasswordStore.java

@@ -78,6 +78,7 @@ public class PasswordStore extends Activity  implements ToCloneOrNot.OnFragmentI
                     System.out.println("Exception caught :(");
                     e.printStackTrace();
                 }
+                this.leftActivity = true;
                 return true;
 
             case R.id.menu_add_password:
@@ -91,11 +92,6 @@ public class PasswordStore extends Activity  implements ToCloneOrNot.OnFragmentI
                 refreshListAdapter();
                 return true;
 
-
-            case android.R.id.home:
-                getFragmentManager().popBackStack();
-                return true;
-
             default:
                 break;
         }

app/src/main/java/com/zeapo/pwdstore/UserPreference.java

@@ -2,6 +2,7 @@ package com.zeapo.pwdstore;
 
 import android.os.Bundle;
 import android.preference.PreferenceActivity;
+import android.view.MenuItem;
 
 public class UserPreference extends PreferenceActivity {
 
@@ -12,4 +13,20 @@ public class UserPreference extends PreferenceActivity {
 
         getActionBar().setDisplayHomeAsUpEnabled(true);
     }
+
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        // Handle action bar item clicks here. The action bar will
+        // automatically handle clicks on the Home/Up button, so long
+        // as you specify a parent activity in AndroidManifest.xml.
+        int id = item.getItemId();
+        switch (id) {
+            case android.R.id.home:
+                setResult(RESULT_OK);
+                finish();
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
 }