java Android微调器将数据从活动移动到另一个活动

Question

这是发送数据的方法

public void commitData(View v) {
        Bundle bundle=new Bundle();
        bundle.putString("key", spinner.getItemAtPosition(spinner.getSelectedItemPosition()).toString());
    //  String selection = spinner.getSelectedItem().toString();
        Intent alarmSet = new Intent(getApplicationContext(), ViewOffense.class);
        alarmSet.putExtras(bundle);
        startActivityForResult(alarmSet, 0);
    }

这是接收数据的方法

public class ViewOffense extends Activity {
    EditOffense eo=new EditOffense();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.viewoffense);

        Bundle bundle=this.getIntent().getExtras();
        if(bundle != null){
        String selection=bundle.getString("key");
        TextView textview=(TextView)findViewById(R.id.textview);
        textview.setText(selection);
        }
        else{
            Toast.makeText(ViewOffense.this,"Haven't Received any data yet", Toast.LENGTH_LONG).show();
        }
        }

我不断收到空指针异常