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Android-无法从ListView中修改对象

android

Android-无法从ListView中修改对象,android,android-listview,android-arrayadapter,parcelable,Android,Android Listview,Android Arrayadapter,Parcelable,我的无线电机柜故障活动： public class Radio_Cabinet_Defect_Activity extends Activity { private ListView mList; private CabinetDefectAdapter mCabinetDefectAdapter; private RadioSiteSubsection mRadioSiteSubsection; @Override protected void o

我的
无线电机柜故障活动
：

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();
    }
}

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);
}
此适配器与自定义视图
R.layout.radio\u cabinet\u defect\u项支持的列表视图链接

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
无线电\u机柜\u缺陷\u活动
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。所有操作都从该活动开始（
无线电机柜故障活动
）：

如您所见，我将
RadioSite
的子对象
RadioSite子部分
传递给
Radio\u Cabinet\u Defect\u活动
（前面发布的活动）。我想要的是，当我返回到
Radio\u Cabinet\u活动时
，我希望
RadioSite
中有更新的值。我希望我已经很好地解释了情况

编辑2

谢谢@Sufian。要重新设置上限，我有一个主要活动，即具有
RadioSite
对象的
Radio\u Cabinet\u活动


RadioSite
对象具有多个子对象。因此，我将
RadioSite
子对象列表的
RadioSite
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
radiosite子节
对象传递到下一个活动
Radio\u Cabinet\u Defect\u活动
。在本活动中，我有另一个适配器
Cabinet\u Defect\u adapter
，其中我传递了一个名为
radiositeffect
的
radiositeffect子对象列表。在最后一个适配器中，我有一个用于复选框的
OnCheckedChangeListener
，当调用它时，我更新
RadioSiteDefect
对象上的相应字段。理想的最终情况是，当我返回到
无线电机柜活动时，修改原始的
无线电站点
对象


我知道这有点扭曲：）
问题不在于如何取回复选框值，而在于如何从
列表视图中的复选框中获取更新值并将其保存在我的对象上（然后将更新后的对象转移到上一个活动）

我通过调用
ListView
的
getItem（）
方法解决了这个问题，因此我能够获得更新的元素


感谢您的支持。
您知道android中的视图回收吗？是的，我知道回收。所以没有办法在ListView中修改对象？您已经发布了很多代码。如果您只发布所需的代码片段会更好。无论如何，您已经发布了两个不同的
活动代码。他们是同一个班吗？好的，我知道了。让我检查一下。保存/获取
复选框的状态是一个老问题。你会发现很多关于它的问题。如果你提供了它的来源会更好。

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);
}



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;
    }
}