[tor-commits] [snowflake-mobile/master] Handled back press from fragments

[cohosh at torproject.org]

commit a9548589575a7bc6dc443df09189e5eef27b4c1c
Author: Hashik Donthineni <HashikDonthineni at gmail.com>
Date:   Sun Jun 28 16:19:23 2020 +0530

    Handled back press from fragments
---
 .../java/org/torproject/snowflake/MainActivity.java  | 20 ++++++++++++++++++++
 .../snowflake/constants/FragmentConstants.java       |  6 ++++++
 2 files changed, 26 insertions(+)

diff --git a/app/src/main/java/org/torproject/snowflake/MainActivity.java b/app/src/main/java/org/torproject/snowflake/MainActivity.java
index a1eb34d..7bafaf4 100644
--- a/app/src/main/java/org/torproject/snowflake/MainActivity.java
+++ b/app/src/main/java/org/torproject/snowflake/MainActivity.java
@@ -8,6 +8,7 @@ import android.content.SharedPreferences;
 import android.graphics.Color;
 import android.os.Build;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 import android.widget.Button;
 
@@ -15,6 +16,7 @@ import androidx.appcompat.app.AppCompatActivity;
 import androidx.fragment.app.Fragment;
 
 import org.torproject.snowflake.constants.ForegroundServiceConstants;
+import org.torproject.snowflake.constants.FragmentConstants;
 import org.torproject.snowflake.interfaces.MainFragmentCallback;
 
 /**
@@ -22,6 +24,7 @@ import org.torproject.snowflake.interfaces.MainFragmentCallback;
  */
 public class MainActivity extends AppCompatActivity implements MainFragmentCallback {
     private static final String TAG = "MainActivity";
+    int currentFragment;
     private SharedPreferences sharedPreferences;
     private Button settingsButton;
 
@@ -59,6 +62,14 @@ public class MainActivity extends AppCompatActivity implements MainFragmentCallb
      * @param fragment New Fragment that is to be placed in the container.
      */
     private void startFragment(Fragment fragment) {
+        if (fragment instanceof MainFragment) {
+            currentFragment = FragmentConstants.MAIN_FRAGMENT;
+        } else {
+            currentFragment = FragmentConstants.APP_SETTINGS_FRAGMENT;
+        }
+
+        Log.d(TAG, "startFragment: " + currentFragment);
+
         getSupportFragmentManager()
                 .beginTransaction()
                 .replace(R.id.fragment_container,
@@ -107,4 +118,13 @@ public class MainActivity extends AppCompatActivity implements MainFragmentCallb
             notificationManager.createNotificationChannel(channel);
         }
     }
+
+    @Override
+    public void onBackPressed() {
+        //If the back is pressed on AppSettingsFragment take it back to MainFragment.
+        if(currentFragment == FragmentConstants.APP_SETTINGS_FRAGMENT)
+            startFragment(MainFragment.newInstance());
+        else
+            super.onBackPressed();
+    }
 }
diff --git a/app/src/main/java/org/torproject/snowflake/constants/FragmentConstants.java b/app/src/main/java/org/torproject/snowflake/constants/FragmentConstants.java
new file mode 100644
index 0000000..00942b8
--- /dev/null
+++ b/app/src/main/java/org/torproject/snowflake/constants/FragmentConstants.java
@@ -0,0 +1,6 @@
+package org.torproject.snowflake.constants;
+
+public class FragmentConstants {
+    public static final int MAIN_FRAGMENT = 0;
+    public static final int APP_SETTINGS_FRAGMENT = 1;
+}