access the variable in activity in another class

Question

In my application I need a variable from one activity to another activity without using any intent. So I have declared that variable as static and used as FirstActivit

Answer 1

You should define your subclassed application class in your manifest. And you should never call "new ApplicationClass()". You can get a reference to ApplicationClass instance using activity's getApplication() method.

Detail.java:

public class Detail extends Activity{

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.stockdetail);
    ApplicationClass app = (ApplicationClass)getApplication();
    app.setStockName("blah");
}
}

Table.java

public class Table {
public String selectDate;
public Table(Activity a)
{
    ApplicationClass ac=(ApplicationClass)a.getApplication();
    selectdate="Select " + column1 + " as _id, " + column2 + " From " + tablename + " Where " + column3 + " = " 
                            + ac.getStockName();
}

Instantiate Table.java

public NewActivity extends Activity{

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Table t = new Table(this);

}
}