Android-无法从ListView中获取修改的对象

Question

我的Radio_Cabinet_Defect_Activity:

public class Radio_Cabinet_Defect_Activity extends Activity {
    private ListView mList;
    private CabinetDefectAdapter mCabinetDefectAdapter;
    private RadioSiteSubsection mRadioSiteSubsection;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_radio__cabinet__defect);
        Intent i = getIntent();
        if (i.hasExtra("radio_site_subsection_data")) {
            mRadioSiteSubsection = i.getParcelableExtra("radio_site_subsection_data");
        }
        mList = (ListView) findViewById(R.id.cabinet_defect_list);
        TextView title = (TextView) findViewById(R.id.cabinet_point_title);
        title.setText(mRadioSiteSubsection.getSubsectionNum() + " " + mRadioSiteSubsection.getName());
        TextView description = (TextView) findViewById(R.id.cabinet_point_description);
        description.setText(mRadioSiteSubsection.getDescription());
        CheckBox okCheckBox = (CheckBox) findViewById(R.id.checkbox_point_ok);
        okCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                ArrayList<Severity> severities = mRadioSiteSubsection.getGlobalSeverities();
                severities.get(SeverityList.OK.intValue()).setChecked(isChecked);
                // If we checked OK, then other checkboxes must be unchecked
                if (isChecked) {
                    for (int i = SeverityList.CRITICAL.intValue(); i < severities.size(); ++i) {
                        severities.get(i).setChecked(false);
                    }
                }
                mRadioSiteSubsection.setGlobalSeverities(severities);
            }
        });
        Button backBtn = (Button) findViewById(R.id.cabinet_point_back_btn);
        backBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
    @Override
    public void onBackPressed() {
    }
    @Override
    public void onResume() {
        super.onResume();
        mCabinetDefectAdapter = new CabinetDefectAdapter(Radio_Cabinet_Defect_Activity.this,
                mRadioSiteSubsection.getDefects());
        mList.setOnItemClickListener(null);
        mList.setAdapter(mCabinetDefectAdapter);
        mCabinetDefectAdapter.notifyDataSetChanged();
    }
}

我将对象列表传递给以下Adapter:

public class CabinetDefectAdapter extends ArrayAdapter<RadioSiteDefect> {
    private final Context mContext;
    static class ViewHolder {
        public TextView mText;
        public CheckBox mCabinetDefectChkBox;
    }
    public CabinetDefectAdapter(Context context, List<RadioSiteDefect> radio_site_defects) {
        super(context, R.layout.radio__cabinet_defect_item, radio_site_defects);
        this.mContext = context;
    }
    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View rowView = convertView;
        // reuse views
        if (rowView == null) {
            LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            rowView = inflater.inflate(R.layout.radio__cabinet_defect_item, parent, false);
            // configure view holder
            ViewHolder viewHolder = new ViewHolder();
            viewHolder.mText = (TextView) rowView.findViewById(R.id.cabinet_defect_details);
            viewHolder.mCabinetDefectChkBox = (CheckBox) rowView.findViewById(R.id.cabinet_defect_details_checkbox);
            rowView.setTag(viewHolder);
        }
        // fill data
        final ViewHolder holder = (ViewHolder) rowView.getTag();
        final RadioSiteDefect radio_site_defect = super.getItem(position);
        holder.mText.setText(radio_site_defect.getDefectNum() + " " + radio_site_defect.getDescription());
        holder.mCabinetDefectChkBox.setText(radio_site_defect.getSeverity().getName());
        if (radio_site_defect.getSeverity().isChecked()) {
            holder.mCabinetDefectChkBox.setChecked(true);
        } else {
            holder.mCabinetDefectChkBox.setChecked(false);
        }
        holder.mCabinetDefectChkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                radio_site_defect.getSeverity().setChecked(isChecked);
            }
        });
        return rowView;
    }
}

此适配器与由自定义视图R.layout.radio__cabinet_defect_item支持的ListView链接。

当我按下复选框时，我会更新对象上相应的复选框标志。但在Radio_Cabinet_Defect_Activity上，对象保持不变。有没有办法修改对象，或者我完全没有抓住要点？

提前谢谢。

编辑

我错过了一个重要的部分。所有从该活动开始（Radio_Cabinet_Defect_Activity）：

public class Radio_Cabinet_Activity extends Activity {
private ListView mList;
private CabinetAdapter mCabinetAdapter;
private RadioSite mCabinetData;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_radio__cabinet_);
    mList = (ListView) findViewById(R.id.cabinet_list);
    loadCabinetData();
    mCabinetAdapter = new CabinetAdapter(Radio_Cabinet_Activity.this, mCabinetData.getSubsections());
    mList.setOnItemClickListener(null);
    mList.setAdapter(mCabinetAdapter);
    Button backBtn = (Button) findViewById(R.id.cabinet_back_btn);
    backBtn.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            finish();
        }
    });
}
@Override
public void onBackPressed() {
}
private void loadCabinetData() {
    if (mCabinetData == null) {
        mCabinetData = new RadioSite();
    }
    String[] radio_site_list = getResources().getStringArray(R.array.radio_site_list);
    String[] radio_severity_list = getResources().getStringArray(R.array.radio_severity_list);
    mCabinetData.setId(RadioSiteList.CABINET.intValue());
    mCabinetData.setName(radio_site_list[RadioSiteList.CABINET.intValue()]);
    String[] cabinet_categories = getResources().getStringArray(R.array.cabinet_categories);
    String[] cabinet_categories_details = getResources().getStringArray(R.array.cabinet_categories_details);
    // Add subsections
    ArrayList<RadioSiteSubsection> cabinet_subsections = new ArrayList<RadioSiteSubsection>(
            cabinet_categories.length);
    for (int i = 0; i < cabinet_categories.length; ++i) {
        RadioSiteSubsection subsection = new RadioSiteSubsection();
        subsection.setSubsectionNum((RadioSiteList.CABINET.intValue() + 1) + "." + (i + 1));
        subsection.setName(cabinet_categories[i]);
        subsection.setDescription(cabinet_categories_details[i]);
        // Add severities
        ArrayList<Severity> global_severities = new ArrayList<Severity>(radio_severity_list.length);
        for (int j = 0; j < radio_severity_list.length; ++j) {
            Severity severity = new Severity();
            severity.setName(radio_severity_list[j]);
            global_severities.add(severity);
        }
        subsection.setGlobalSeverities(global_severities);
        // Add defects for this subsection
        ArrayList<RadioSiteDefect> cabinet_sub_defects = new ArrayList<RadioSiteDefect>();
        String[] defect_list = getResources().getStringArray(CommonResources.getCabinetDefectList(i));
        for (int j = 0; j < defect_list.length; ++j) {
            RadioSiteDefect defect = new RadioSiteDefect();
            defect.setDefectNum((RadioSiteList.CABINET.intValue() + 1) + "." + (i + 1) + "." + (j + 1));
            String[] defectStr = defect_list[j].split("\|");
            defect.setDescription(defectStr[0]);
            Severity severity = new Severity();
            severity.setName(defectStr[1]);
            defect.setSeverity(severity);
            cabinet_sub_defects.add(defect);
        }
        subsection.setDefects(cabinet_sub_defects);
        cabinet_subsections.add(subsection);
    }
    mCabinetData.setSubsections(cabinet_subsections);
}

正如你所看到的，我有一个RadioSite的子对象，我通过以下Adapter:

public class CabinetAdapter extends ArrayAdapter<RadioSiteSubsection> {
    private final Context mContext;
    private final String[] mRadioSeverityList;
    static class ViewHolder {
        public TextView mText;
        public Button mCabinetBtn;
        public Button mCabinetNotesBtn;
        public Button mCabinetImgBtn;
        public CheckBox[] mCabinetChkBox;
    }
    public CabinetAdapter(Context context, List<RadioSiteSubsection> radio_site_subsections) {
        super(context, R.layout.radio__cabinet_item, radio_site_subsections);
        this.mContext = context;
        this.mRadioSeverityList = mContext.getResources().getStringArray(R.array.radio_severity_list);
    }
    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View rowView = convertView;
        // reuse views
        if (rowView == null) {
            LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            rowView = inflater.inflate(R.layout.radio__cabinet_item, parent, false);
            // configure view holder
            ViewHolder viewHolder = new ViewHolder();
            viewHolder.mText = (TextView) rowView.findViewById(R.id.cabinet_desc);
            viewHolder.mCabinetBtn = (Button) rowView.findViewById(R.id.cabinet_btn);
            viewHolder.mCabinetNotesBtn = (Button) rowView.findViewById(R.id.cabinet_btn_notes_obs);
            viewHolder.mCabinetImgBtn = (Button) rowView.findViewById(R.id.cabinet_btn_image);
            viewHolder.mCabinetChkBox = new CheckBox[CommonResources.getRadioCheckboxLength()];
            for (int i = 0; i < mRadioSeverityList.length; ++i) {
                viewHolder.mCabinetChkBox[i] = (CheckBox) rowView.findViewById(CommonResources.getRadioCheckboxRes(i));
            }
            rowView.setTag(viewHolder);
        }
        // fill data
        ViewHolder holder = (ViewHolder) rowView.getTag();
        final RadioSiteSubsection radio_site_subsection = super.getItem(position);
        holder.mText.setText(radio_site_subsection.getSubsectionNum() + " " + radio_site_subsection.getName());
        holder.mCabinetBtn.setText(radio_site_subsection.getSubsectionNum());

        holder.mCabinetBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(mContext, Radio_Cabinet_Defect_Activity.class);
                intent.putExtra("radio_site_subsection_data", radio_site_subsection);
                mContext.startActivity(intent);
            }
        });
        holder.mCabinetNotesBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(mContext, NotesObservationActivity.class);
                intent.putExtra("radio_site_subsection_data", radio_site_subsection);
                mContext.startActivity(intent);
            }
        });
        return rowView;
    }
}

如您所见，我将RadioSite的子对象RadioSiteSubsection传递给Radio_Cabinet_Defect_Activity（前面发布的活动）。我想要的是，当我返回到Radio_Cabinet_Activity时，我希望RadioSite内部有更新的值。我希望我已经很好地解释了情况。

编辑2

谢谢你@Sufian。为了重新定义，我有一个主要活动，即具有RadioSite对象的Radio_Cabinet_Activity。

RadioSite对象有几个子对象。因此，我将RadioSite的RadioSiteSubsection子对象列表传递给CabinetAdapter，以在Listview中显示它。在CabinetAdapter内部，我有一个OnClickListener，其中我将单个RadioSiteSubsection对象传递给下一个活动Radio_Cabinet_Defect_Activity。在这个活动中，我有另一个适配器Cabinet_Defect_Adapter，我在其中传递一个RadioSiteSubsection的子对象列表，名为RadioSiteDefect。在最后一个适配器中，我有一个用于复选框的OnCheckedChangeListener，当它被调用时，我会更新RadioSiteDefect对象上的相应字段。希望的最终情况是，当我返回到Radio_Cabinet_Activity时，修改原始RadioSite对象。

我知道这有点扭曲：）

Answer 1

问题与如何取回复选框值无关，而是如何从ListView中的复选框中获取更新后的值并将其保存在我的对象上（然后将更新后的对象转移到以前的活动）。

我通过调用ListView的getItem()方法进行求解，所以我能够获得更新的元素。

感谢您的支持。