Question

我是android中的新手。我想通过复选框发送列表项ID。我有一个带有复选框的自定义列表视图。我想在复选框点击时发送，选中的id将这些id通过数组发送到我的mysql数据库。但是我不明白该怎么做。

自定义行

private Activity activity;
private List<TestAddData> Items;
private LayoutInflater inflater;

public CustomTestAdd(Activity activity, List<TestAddData> items) {
    this.activity = activity;
    Items = items;
}

@Override
public int getCount() {
    return Items.size();
}

@Override
public Object getItem(int location) {
    return Items.get(location);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    convertView = inflater.inflate(R.layout.activity_custom_test_add, null,true);

    TextView testname = (TextView)convertView.findViewById(R.id.testname);
    CheckBox testid = (CheckBox) convertView.findViewById(R.id.testid);

    //getting data
    TestAddData m = Items.get(position);

    //set data
    testname.setText(m.getTestName());

    return convertView;
}

此类扩展了BaseAdapter ..

数据保存类

private int testid;
private String testName;
private boolean isSelected;
public TestAddData(){}

public int getTestid() {
    return testid;
}

public void setTestid(int testid) {
    this.testid = testid;
}

public String getTestName() {
    return testName;
}

public void setTestName(String testName) {
    this.testName = testName;
}

public boolean isSelected() {
    return isSelected;
}

public void setSelected(boolean selected) {
    isSelected = selected;
}

public TestAddData(int testid, String testName, boolean isSelected) {
    this.testid = testid;
    this.testName = testName;
    this.isSelected = isSelected;
}

我想通过复选框传递此测试ID。

列出活动

class task2 extends AsyncTask<String, String, Void> {

    InputStream is = null;
    String result = "";

    @Override
    protected void onPreExecute() {
        findViewById(R.id.pb).setVisibility(View.VISIBLE);
    }

    @Override
    protected Void doInBackground(String... strings) {
        String url_select = "http://mybusket.com/webapi/dgc/dgcbcl/get_all_patient.php";

        HttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(url_select);

        ArrayList<NameValuePair> param = new ArrayList<NameValuePair>();
        try {
            httpGet.setURI(new URI(url_select));

            HttpResponse httpResponse = httpClient.execute(httpGet);
            HttpEntity httpEntity = httpResponse.getEntity();

            // read content
            is = httpEntity.getContent();

        } catch (Exception e) {

            Log.e("log_tag", "Error in http connection " + e.toString());
        }
        try {
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(is));
            StringBuilder sb = new StringBuilder();
            String line = "";
            while ((line = br.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            result = sb.toString();

        } catch (Exception e) {
            // TODO: handle exception
            Log.e("log_tag", "Error converting result " + e.toString());
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        try {
            lv2 = (ListView)findViewById(R.id.testList);
            lv2.setAdapter(customTestAdd);
            JSONObject object = new JSONObject(result);
            JSONArray jsonArray = object.getJSONArray("pat");
            for (int i = 0; i < jsonArray.length(); i++)
            {
                JSONObject obj = jsonArray.getJSONObject(i);
                TestAddData patientData = new TestAddData();
                patientData.setTestName(obj.getString("name"));
                patientData.setTestid(obj.getInt("patid"));

                testLists.add(patientData);
            }
        } catch (JSONException e) {
            Log.e("log_tag", "Error parsing data " + e.toString());
        }

        findViewById(R.id.pb).setVisibility(View.GONE);
    }
}

Answer 1

private Activity activity;
private List<TestAddData> Items;
private LayoutInflater inflater;

public CustomTestAdd(Activity activity, List<TestAddData> items) {
    this.activity = activity;
    Items = items;
}

@Override
public int getCount() {
    return Items.size();
}

@Override
public Object getItem(int location) {
    return Items.get(location);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    convertView = inflater.inflate(R.layout.activity_custom_test_add, null,true);

    TextView testname = (TextView)convertView.findViewById(R.id.testname);
    CheckBox testid = (CheckBox) convertView.findViewById(R.id.testid);

testid.setTag(position);
testid.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

       @Override
       public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
int pos=(int)buttonView.getTag();
testid.setChecked(isChecked);
int id=Items.get(pos).id;


       }
   }
);

    //getting data
    TestAddData m = Items.get(position);

    //set data
    testname.setText(m.getTestName());

    return convertView;
}

Answer 2

从您的代码中我看到您无法获得选中的复选框，我已经处理过类似的问题，因此在您担心向数据库提交数据之前，请先获取复选框的值

你的TestAddData需要一个array来保存你的复选框，在我的情况下，我创建了一个String类型的数组并传递了text of the checkbox，因为获取一个id会很乏味

注意：使用数组因为可以检查许多复选框

这是getView()方法

中的代码

final CheckBox testId= (CheckBox) v.findViewById(R.id.checkBoxS);
cb.setText(stringList.get(i));

testId.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() 
{
    @Override
    public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
        if (b){ //checked

            TestAddData.checkedboxes[i]=testId.getText().toString();
        }else { //unchecked
            // pass an empty value
            TestAddData.checkedboxes[i] = "";
        }

    }

});

现在每个选中的框都会将其文本添加到TestAppData中的数组中，只要您想将数据提交到数据库，只需从数组中提取数据即可。我希望这会有所帮助。

如何通过checkbok发送自定义列表视图选择的项目ID

2 个答案: