Question

我开发了一个从另一个calss调用方法的方法。我创建了一个适配器，在里面我有一个覆盖getView（）。我需要做的是从列表视图中获取值并显示为报告。我在同一个项目中的另一个活动中尝试了这个确切的代码。它完美地运作。但是，当我把它移动到另一个活动时，它不会给出任何错误。但是覆盖的方法不是调用。我应该怎么做才能让它运行？

public class ViewList extends ActionBarActivity {
    ArrayAdapter<Units> unitsAdapterView;

    ListView ViewAll;

    List<Units> Unit = new ArrayList<Units>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_view_list);
        ViewAll = (ListView) findViewById(R.id.viewList);
       populateListView();
        viewView();
    }
    private  void viewView(){
        Button m=(Button)findViewById(R.id.tryBtn);
        m.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
              //  startActivity(new Intent(getApplicationContext(),ViewList.class));
                populateListView();
            }
        });
    }

    private  void populateListView(){
        unitsAdapterView =new UnitListAdaptorView();
        ViewAll.setAdapter(unitsAdapterView);
     //   unitsAdapterView.getView();
    }
    private  class UnitListAdaptorView extends  ArrayAdapter<Units> {
        public UnitListAdaptorView() {
            super   (ViewList.this, R.layout.list,Unit);
            Log.i("","A");
         //   A();

        }

@override
        public View getView(int position, View view, ViewGroup parent) {
            Log.i("","Resue connceted bulb 5");
            if (view == null) {
                view = getLayoutInflater().inflate(R.layout.list,parent ,false);

            }

            Units currentUnit = Unit.get(position);
            TextView name = (TextView)view.findViewById(R.id.lblViewName);
            name.setText(currentUnit.getName());

            TextView bulb=(TextView) view.findViewById(R.id.lblViewBulb);
            bulb.setText(currentUnit.getBulbNo());
            TextView fan=(TextView) view.findViewById(R.id.lblViewFan);
            fan.setText(currentUnit.getFanNo());

            return  view;
        }
    }
}

Answer 1

在添加代码以从数据库获取所有现有数据后，问题得以解决。将以下代码添加到onCreate方法后，该函数现在正在运行！

  DatabaseHandler dbHandler = new DatabaseHandler(getApplicationContext());
    if (dbHandler.getUnitsCount() != 0)
        Unit.addAll(dbHandler.getAllUnit());

如何手动调用覆盖方法？覆盖方法未运行

1 个答案: