public class SetTimeDialog extends Activity{

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


    Button bUseTime = (Button) findViewById(R.id.buttonUseTime_settime);
    bUseTime.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            Intent resultIntent = new Intent(this,SetTimeDialog.class);
            setResult(Activity.RESULT_OK,resultIntent);
            finish();
        }
    });

它在MainActivity中从这里调用：

TableLayout tiMetable = (TableLayout)findViewById(R.id.tiMetable_writepos);
    tiMetable.setOnTouchListener(new View.OnTouchListener() {
        public boolean onTouch(View v,MotionEvent event) {
            Intent settimedialogIntent = new Intent(getApplicationContext(),SetTimeDialog.class);
            startActivityForResult(settimedialogIntent,SETTIMEDIALOG_REQCODE); // See onActivityResult()
            return false;
        }
    });

在我的onActivityResult方法中,我现在什么都不做,只检查resultCode的值. (我已经删除了所有其他代码以找出错误).