WRITE_EXTERNAL_STORAGE at runtime in the backup bin file button

app/src/main/java/cy/agorise/crystalwallet/fragments/BackupsSettingsFragment.java

@@ -8,6 +8,7 @@ import android.content.pm.PackageManager;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Environment;
+import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.app.Fragment;
@@ -76,6 +77,7 @@ public class BackupsSettingsFragment extends Fragment{
     @BindView(R.id.btnBinFile)
     public Button btnBinFile;
 
+
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
@@ -103,13 +105,40 @@ public class BackupsSettingsFragment extends Fragment{
     public void btnBrainOnClick(){
 
         Intent intent = new Intent(getContext(), BackupSeedActivity.class);
-        intent.putExtra("SEED_ID","");
+        intent. putExtra("SEED_ID","");
         startActivity(intent);
     }
 
+
     @OnClick(R.id.btnBinFile)
     public void makeBackupFile(){
 
+        /*
+        * Check for WRITE_EXTERNAL_STORAGE permission
+        * */
+        if (Build.VERSION.SDK_INT >= 23) {
+            if (checkPermission()) {
+                // Code for above or equal 23 API Oriented Device
+                // Your Permission granted already .Do next code
+
+                makeBackupfileAfterPermission();
+
+            } else {
+                requestPermission(); // Code for permission
+            }
+        }
+        else {
+
+            // Code for Below 23 API Oriented Device
+            // Do next code
+
+            makeBackupfileAfterPermission();
+        }
+    }
+
+
+    private void makeBackupfileAfterPermission(){
+
         if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
 
             LiveData<GeneralSetting> generalSettingLD = CrystalDatabase.getAppDatabase(getContext()).generalSettingDao().getByName(GeneralSetting.SETTING_PASSWORD);
@@ -144,4 +173,40 @@ public class BackupsSettingsFragment extends Fragment{
             });
         }
     }
+
+    private boolean checkPermission() {
+        int result = ContextCompat.checkSelfPermission(getActivity(), android.Manifest.permission.WRITE_EXTERNAL_STORAGE);
+        if (result == PackageManager.PERMISSION_GRANTED) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    private void requestPermission() {
+
+        if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(), android.Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
+            Toast.makeText(getActivity(), "Write External Storage permission allows us to do store images. Please allow this permission in App Settings.", Toast.LENGTH_LONG).show();
+        } else {
+            ActivityCompat.requestPermissions(getActivity(), new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_CODE);
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+
+        switch (requestCode) {
+            case PERMISSION_REQUEST_CODE:
+                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                    Log.e("value", "Permission Granted, Now you can use local drive .");
+
+                } else {
+                    Log.e("value", "Permission Denied, You cannot use local drive .");
+
+                    makeBackupfileAfterPermission();
+                }
+                break;
+        }
+    }
 }

app/src/main/res/values/strings.xml

@@ -79,6 +79,8 @@
     <string name="save">SAVE</string>
     <string name="next">NEXT</string>
 
+    <string name="ASK_PERMISSION">A permission need to be granted before to continue</string>
+
     <string name="please_enter_brainkey">Please enter brainkey</string>
     <string name="please_enter_correct_brainkey">Please enter correct brainkey</string>
     <string name="balances">Balances</string>