variable value other class

rmeph · by **rmeph** » Wed Dec 26, 2007 3:49 pm

I have first.java.........In we use xml file

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public class friendfind extends Activity  {
 
public String Location = new String("ena");
 
   @Override
 
   protected void onCreate(Bundle icicle) {
 
         super.onCreate(icicle);
 
         setContentView(R.layout.search);
 
        final Intent i1 = new Intent(this, friend.class);
 
        Button addbutton = (Button) findViewById(R.id.button);  
 
          addbutton.setOnClickListener(new View.OnClickListener() {  
 
            public void onClick(View v) {  
 
                  // Perform action on click  
 
                 Location =((EditText)findViewById(R.id.location)).getText().toString(); 
 
             startSubActivity(i1,0);
 
              }
 
             });
 
}
 
}
Parsed in 0.059 seconds,  using GeSHi 1.0.8.4

and In second class we access Location variable value

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public class friend extends ListActivity {
 
friendfind f=new friendfind();
 
protected void onCreate(Bundle icicle) {
 
      super.onCreate(icicle);
 
     Log.i(TAG,"Location  ="+f.Location);
 
}
 
}
Parsed in 0.030 seconds,  using GeSHi 1.0.8.4

but it's show NULLPOINTER error in second class
How to access value in second class????

plusminus · by **plusminus** » Wed Dec 26, 2007 10:49 pm

Hello rmeph,

Probably "f" is null, because String-concatenation with null-Objects is possible :!:

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                Object o = null;
                String s = "o is: " + o; // --> 'o is: null'
Parsed in 0.033 seconds,  using GeSHi 1.0.8.4

So it doesn't happen, if you use no xml-Layouting :?:

Have a look at :src: this tutorial on how to pass data to SubActivities.

Regards,
plusminus

variable value other class

variable value other class

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