Question

I using Eclipse and the Android emulator. Can someone tell me what is wrong here.

//  FILE MainClass.java
    package xxx.yyy;
    import android.app.Activity;
    import android.os.Bundle;
    import android.widget.TextView;

    public class MainClass extends Activity {

        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.layoutA);
    // If this line is enabled, it works fine
            Test1();
    //  but if these lines are enabled, you get FORCE CLOSE
        Class2 c2 = new Class2();
        C2.Test2();
    }

    public void Test1() {
    setContentView(R.layout.layoutA);
          TextView tv = (TextView)findViewById(R.id.DisplayLine);
    tv.setText("Start");
    }
    }

---

//  FILE Class2.java
package xxx.yyy;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class Class2  extends Activity {
    TextView tv;

//  @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
      }

 public void Test2 () {
      setContentView(R.layout.layoutA);
      TextView tv = (TextView)findViewById(R.id.DisplayLine);
    tv.setText("Start");
        }
}

---

//   FILE layoutA.xml
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
android:id="@+id/widget0"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
>
<TextView
android:id="@+id/DisplayLine"
android:layout_width="350px"
android:layout_height="40px"
android:background="#ff99ff99"
android:textStyle="bold"
android:textColor="#ff000000"
android:layout_x="10px"
android:layout_y="10px"
>
</TextView>
</AbsoluteLayout>

If Test1 is allowed to run it is OK.
If Test2 is allowed to run, get FORCE CLOSE.

Answer 1

Try instantiate Class2 using startActivity instead Class2 c2 = new Class2();

Also, I’ve noticed that you use c2 and C2 (case sensitive error).

I hope that can help you.