Receiving back the proper filepath when back button is pressed

Author: BalioFVFX

simplefileexplorer/src/main/java/com/example/simplefileexplorer/ActivityListener.java

@@ -5,5 +5,5 @@
 interface ActivityListener extends Serializable {
     void onDirectoryChanged(String absolutePath);
     void onFileSelect(String absolutePath);
-    void updateFileTypeIcon();
+    void onBackButtonPressed(String absolutePath);
 }

simplefileexplorer/src/main/java/com/example/simplefileexplorer/SimpleFileExplorerActivity.java

@@ -4,6 +4,7 @@
 import android.app.Activity;
 import android.content.Intent;
 import android.content.pm.PackageManager;
+import android.os.Environment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.content.ContextCompat;
 import android.support.v7.app.AppCompatActivity;
@@ -34,14 +35,8 @@ protected void onCreate(Bundle savedInstanceState) {
         this.setSelectButtonClickListener();
         SimpleFileExplorerFragment fragment = new SimpleFileExplorerFragment();
         fragment.setListeners(this);
-        getSupportFragmentManager().beginTransaction().add(R.id.frame_layout, fragment).addToBackStack(this.STACK_KEY).commit();
-
-        getSupportFragmentManager().addOnBackStackChangedListener(new FragmentManager.OnBackStackChangedListener() {
-            @Override
-            public void onBackStackChanged() {
-                selectButton.setEnabled(false);
-            }
-        });
+        getSupportFragmentManager().beginTransaction().add(R.id.frame_layout, fragment).addToBackStack(STACK_KEY).commit();
+        this.selectedAbsolutePath = Environment.getExternalStorageDirectory().getAbsolutePath();
     }
 
     private void initViews(){
@@ -72,10 +67,11 @@ public void onClick(View v) {
 
     @Override
     public void onDirectoryChanged(String absolutePath) {
+        this.selectedAbsolutePath = absolutePath;
         SimpleFileExplorerFragment fragment = new SimpleFileExplorerFragment();
         fragment.setListeners(this);
         fragment.setDirectory(absolutePath);
-        getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout, fragment).addToBackStack(this.STACK_KEY).commit();
+        getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout, fragment).addToBackStack(STACK_KEY).commit();
     }
 
     @Override
@@ -85,8 +81,9 @@ public void onFileSelect(String absolutePath) {
     }
 
     @Override
-    public void updateFileTypeIcon() {
+    public void onBackButtonPressed(String absolutePath) {
         this.fileTypeImageView.setImageResource(R.drawable.ic_folder);
+        this.selectedAbsolutePath = absolutePath;
     }
 
     private void checkPermission(){

simplefileexplorer/src/main/java/com/example/simplefileexplorer/SimpleFileExplorerFragment.java

@@ -10,7 +10,6 @@
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.Toast;
 
 import java.io.File;
 import java.util.ArrayList;
@@ -58,6 +57,9 @@ private void loadDirectory(){
         if(this.selectedAbsolutePath != null){
             root = new File(this.selectedAbsolutePath);
         }
+        else{
+            this.selectedAbsolutePath = root.getAbsolutePath();
+        }
 
         List<FileModel> fileModelList = new ArrayList<>();
 
@@ -108,6 +110,6 @@ void setDirectory(String dir){
     @Override
     public void onStart() {
         super.onStart();
-        this.activityListener.updateFileTypeIcon();
+        this.activityListener.onBackButtonPressed(this.selectedAbsolutePath);
     }
 }