getting Null Pointer Exception in android on setOnClickListener

Question

I am getting Null Pointer Exception in button.setOnClickListener why i don't know. i just check all xml file and other stuff but still getting any one can please resolve my problem.

Thanks in Advance.

public class StartingPoint extends Activity implements View.OnClickListener{

Button bLearn_Basic_C_Programs;
Button bC_Programs;
Button bMoreApps;

String thepixelmakerWebSiteAddress ="";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.c_programs_start);


    bLearn_Basic_C_Programs = (Button)findViewById(R.id.bLearn_Basic_C_Programs);
    bC_Programs             = (Button) findViewById(R.id.bC_Programs);
    bMoreApps               = (Button) findViewById(R.id.bMoreApps);



    Log.d("here", "first");
            // i getting exception here
    bLearn_Basic_C_Programs.setOnClickListener(this);
    Log.d("here", "second");
    bC_Programs.setOnClickListener(this);
    bMoreApps.setOnClickListener(this);


}

public void onClick(View view) {

      switch(view.getId()){

      case R.id.bLearn_Basic_C_Programs: 

          Intent intent1 = new Intent(StartingPoint.this, Learn_Basic_C_Programs_Start.class);
          this.startActivity(intent1);
           break;

      case R.id.bC_Programs:

          Intent intent2 = new Intent(StartingPoint.this, C_Programs_Start_1_50.class);
          this.startActivity(intent2);
          break;

      case R.id.bMoreApps:
          Intent intenMoreApps = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(thepixelmakerWebSiteAddress));
          startActivity(intenMoreApps);
          break;
      }
}

}

Are you sure that your c_programs_start layout includes R.id.bLearn_Basic_C_Programs ? — Sercan Ozdemir
– Sercan Ozdemir, Commented Apr 18, 2014 at 18:04

Myko Huff · Accepted Answer · 2014-04-18 19:08:02Z

4

It seems that findViewById really isn't finding the button. My guess is that either, c_programs_start is incorrect or your id's are incorrect.

In the future, you should try to paste the xml as well for these sorts of questions.

edited Apr 18, 2014 at 19:08

answered Apr 18, 2014 at 18:14

Myko Huff

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2 Comments

Pawan Chaurasiya Over a year ago

still getting same exception

Pawan Chaurasiya Over a year ago

sorry i resolve the problem thanks for your cooperation. ya you are right findViewById isn't finding the button

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