Clash Royale CLAN TAG#URR8PPP

Using button.getTag() causes the app to Crash

whenever I try to get .tag() My App Crashes. It's been a while and , i can't solve the problem....

public class MainActivity extends AppCompatActivity

public void translateFrench(View view)

Button button = (Button) view;

Log.i("Nothing", button.getTag().toString());


@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);




XML:

<android.support.v7.widget.GridLayout
android:layout_width="368dp"
android:layout_height="495dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:columnCount="2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:rowCount="4">

<Button
android:id="@+id/button1"
android:text="Do you speak nEnglish?"
app:layout_columnWeight="1"
app:layout_gravity="fill"
app:layout_rowWeight="1"
android:onClick="translateFrench"/>

<Button
android:id="@+id/button2"
android:text="Good Evening"
app:layout_columnWeight="1"
app:layout_gravity="fill"
app:layout_rowWeight="1"
android:onClick="translateFrench"/>

</android.support.v7.widget.GridLayout>


Error Log:

Caused by: java.lang.reflect.InvocationTargetException
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference
at

1 Answer
1

you need to call setTag() before getTag()
I think you can find useful information at this post

What is the main purpose of setTag() getTag() methods of View?

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.