Android onClick操作

费拉斯，我一直在努力尝试在TextView上实现一个相当简单的onClick动作，但没有成功。这是我的代码：

    public class AccountsActivity extends Activity {

    final Context context = this;

     private TextView tvNextOkin;


    /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
        setContentView(R.layout.my_account);

        tvNextOkin = (TextView) findViewById(R.id.tv_acc_next_of_kin);
         tvNextOkin.setText("Not set. Tap here to add");
         tvNextOkin.setTextColor(Color.RED);

        }



        public void performClick(View view){
         Log.i("Action::", "clicked!!");

      // add  listener
      tvNextOkin.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View arg0) {

                  // custom dialog
                final Dialog dialog = new Dialog(context);
                dialog.setContentView(R.layout.custom_dialog);
                  dialog.setTitle("This is a custom dialog");

                     dialog.show();
         }


         });
     }

 }

这是xml布局：

    <?xml version="1.0" encoding="utf-8"?>
    <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#ffffff" >

    <LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:padding="2dp" >

     <TextView
      android:id="@+id/tv_acc_next_of_kin"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_marginTop="5dp"
      android:text="tap here to add"
      android:textColor="#000"
      android:textSize="14dp"
      android:onClick="performClick"
      android:typeface="sans" />

      </LinearLayout>

      </ScrollView>

我的目的是在单击textview时能够调用performClick（）方法。有什么建议？