RestoreMessagesActivity: find account to load

+ some fixes

src/main/java/fr/unix_experience/owncloud_sms/activities/remote_account/AccountActionsActivity.java

@@ -2,6 +2,7 @@ package fr.unix_experience.owncloud_sms.activities.remote_account;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
@@ -38,7 +39,12 @@ public class AccountActionsActivity extends AppCompatListActivity {
             case 0:
                 Intent intent = new Intent(this, RestoreMessagesActivity.class);
                 intent.putExtra("account", _accountName);
-                startActivity(intent);
+				try {
+					startActivity(intent);
+				}
+				catch (IllegalStateException e) {
+					Log.e(AccountActionsActivity.TAG, e.getMessage());
+				}
                 break;
             default: break; // Unhandled
         }

src/main/java/fr/unix_experience/owncloud_sms/activities/remote_account/RestoreMessagesActivity.java

@@ -1,15 +1,51 @@
 package fr.unix_experience.owncloud_sms.activities.remote_account;
 
+import android.Manifest;
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
+import android.support.v4.app.ActivityCompat;
 import android.support.v7.app.AppCompatActivity;
 
 import fr.unix_experience.owncloud_sms.R;
 
 public class RestoreMessagesActivity extends AppCompatActivity {
 
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_restore_messages);
-    }
+	Account _account = null;
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_restore_messages);
+
+		assert getIntent().getExtras() != null;
+
+		String accountName = getIntent().getExtras().getString("account");
+
+		// accountName cannot be null, devel error
+		assert accountName != null;
+		AccountManager accountManager = AccountManager.get(getBaseContext());
+		if (ActivityCompat.checkSelfPermission(this, Manifest.permission.GET_ACCOUNTS) != PackageManager.PERMISSION_GRANTED) {
+			// TODO: Consider calling
+			//    ActivityCompat#requestPermissions
+			// here to request the missing permissions, and then overriding
+			//   public void onRequestPermissionsResult(int requestCode, String[] permissions,
+			//                                          int[] grantResults)
+			// to handle the case where the user grants the permission. See the documentation
+			// for ActivityCompat#requestPermissions for more details.
+			return;
+		}
+		Account[] accountList = accountManager.getAccountsByType(getString(R.string.account_type));
+		for (Account element : accountList) {
+			if (element.name.equals(accountName)) {
+				_account = element;
+			}
+		}
+
+		if (_account == null) {
+			throw new IllegalStateException(getString(R.string.err_didnt_find_account_restore));
+		}
+	}
+
+	private static final String TAG = RestoreMessagesActivity.class.getSimpleName();
 }