Question

I have 2 Activities, Activity_A and Activity_B
Activity_A has a checkBox and a Button

what i am trying to do is when i click a Activity_A_button Activity_B would start
Depending on Activity_A checkBox state a TextView is visible or Gone.

here is a sample code

        public class Main extends Activity {
    public static CheckBox check1;
        private Button Button1;

CheckBox check1 = (CheckBox)findViewById(R.id.checkBox1);
Button1 = (Button) findViewById(R.id.button1);


button1.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {

final Intent i = new Intent(this, Activity_A.class);

    startActivity(i);

            }
        });

Activity_B

 Textview1 = (TextView)findViewById(R.id.textView1);

  if (Main.check1.isChecked())

        {
                  //code here

}

the problem is that i am getting a NullPointerExeption when i click Activity_A button @ the if statement

any ideas? thanks in advance

Answer 1

Do something like this.

send the value of the checkbox when calling the activity.then retrieve it from your second activity and work accordingly

final Intent i = new Intent(this, Activity_A.class);
    i.putExtras("value",""+check1.isChecked());//sending checked value to next activity
    startActivity(i);





Textview1 = (TextView)findViewById(R.id.textView1);
Bundle bundle = getIntent().getExtras();
 boolean ok=Boolean.parseBoolean(bundle.getString("value"));

  if (ok) //checkbox is checked in previous activity   
        {
               //code here
        }