If statement not working in Android OnClick

Question

I am new to Android Studio. In my project, I am trying to use IF statement in a very simple setting (to activate a change) but it doesn't work. Your help will be greatly appreciated. Below is my code:

public class MainActivity extends AppCompatActivity { private Button mBtLaunchActivity; private Button Home; int a = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Home = (Button) findViewById(R.id.home_button); mBtLaunchActivity = (Button) findViewById(R.id.map_button); mBtLaunchActivity.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { launchActivity(); a = 1; } }); } private void launchActivity() { if (a == 1) { Home.setVisibility(View.INVISBLE); } Intent intent = new Intent(this, Activity3.class); startActivity(intent); } }

NullPointer · Accepted Answer · 2018-10-01 04:54:26Z

You are updating value of a after launch of Activity.That will never work.

Update it before it:

@Override public void onClick(View view) { launchActivity(); a = 1; }

Change it:

@Override public void onClick(View view) { a = 1; launchActivity(); }

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