我在mysql中有一个数据库，我希望将数据库中的所有数据显示为chkbox列表，其中包含来自数据库的数据。选择几个复选框后，我可以向DB查询有关所选数据的某些数据。我尝试使用下面的listView是我的JAVA文件和xml
这里是JAVA文件
public class BdaySelect extends Activity {
private String jsonResult;
private String url = "http://10.0.2.2/markit/login.php";
private ListView listView;
private TextView textv1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.bday_select);
listView = (ListView) findViewById(R.id.listView1);
textv1=(TextView)findViewById(R.id.textView1);
accessWebService();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
// Async Task to access the web
private class JsonReadTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(params[0]);
try {
HttpResponse response = httpclient.execute(httppost);
jsonResult = inputStreamToString(
response.getEntity().getContent()).toString();
}
catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private StringBuilder inputStreamToString(InputStream is) {
String rLine = "";
StringBuilder answer = new StringBuilder();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
try {
while ((rLine = rd.readLine()) != null) {
answer.append(rLine);
}
}
catch (IOException e) {
// e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error..." + e.toString(), Toast.LENGTH_LONG).show();
}
return answer;
}
@Override
protected void onPostExecute(String result) {
ListDrwaer();
}
}// end async task
public void accessWebService() {
JsonReadTask task = new JsonReadTask();
// passes values for the urls string array
task.execute(new String[] { url });
}
// build hash set for list view
public void ListDrwaer() {
List<Map<String, String>> employeeList = new ArrayList<Map<String, String>>();
try {
JSONObject jsonResponse = new JSONObject(jsonResult);
JSONArray jsonMainNode = jsonResponse.optJSONArray("emp_info");
for (int i = 0; i < jsonMainNode.length(); i++) {
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
String name = jsonChildNode.getString("emp_name");
String number = jsonChildNode.getString("emp_no");
//String chkBoxNo = Integer.toString(i);
//String chkBoxName = "chk"+chkBoxNo;
//CheckBox chkBoxName = new CheckBox(this);
String outPut = name + "-" + number;
employeeList.add(createEmployee("employees", outPut));
}
} catch (JSONException e) {
Toast.makeText(getApplicationContext(), "Error" + e.toString(),
Toast.LENGTH_SHORT).show();
}
SimpleAdapter simpleAdapter = new SimpleAdapter(this, employeeList,
android.R.layout.simple_list_item_1,
new String[] { "employees" }, new int[] { android.R.id.text1 });
listView.setAdapter(simpleAdapter);
}
private HashMap<String, String> createEmployee(String name, String number) {
HashMap<String, String> employeeNameNo = new HashMap<String, String>();
employeeNameNo.put(name, number);
return employeeNameNo;
}
}
XML文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TableRow
android:id="@+id/tableRow2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#29001F"
android:gravity="center" >
<ImageView
android:id="@+id/imageView2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/bck" />
<Space
android:layout_width="100dp"
android:layout_height="30dp"
android:layout_weight="2" />
<ImageButton
android:id="@+id/imageButton1"
android:paddingRight="10dp"
android:background="#29001F"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/setting2" />
</TableRow>
<TableRow
android:background="#29001F"
android:id="@+id/tableRow1"
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center" >
<TextView
android:id="@+id/textView1"
android:layout_width="0dp"
android:gravity="center"
android:textColor="#FFFFFF"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="SELECT"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView2"
android:layout_width="0dp"
android:gravity="center"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="#94808F"
android:text="DISCOUNT"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView3"
android:layout_width="0dp"
android:gravity="center"
android:layout_height="wrap_content"
android:textColor="#94808F"
android:layout_weight="1"
android:text="SEND"
android:textAppearance="?android:attr/textAppearanceMedium" />
</TableRow>
<Space
android:layout_width="match_parent"
android:layout_height="20dp" />
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
<TableRow
android:id="@+id/tableRow6"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_marginTop="102dp"
android:gravity="right"
android:paddingRight="30dp" >
<Button
android:id="@+id/butBdaySelectNext"
android:layout_width="80dp"
android:layout_height="35dp"
android:layout_gravity="center"
android:background="@drawable/arrownext"
android:paddingRight="15dp"
android:text="Next"
android:textColor="#FFFFFF" />
</TableRow>
</LinearLayout>
答案 0 :(得分：0)
在android中创建自定义列表视图的基本概念以自定义视图.xml开始，该视图将对应于每个项目的外观布局。例如，如果您希望每个项目都有一个名称的文本视图和一个复选框，您的自定义布局将只包含一个带有textview和复选框的线性（水平）布局。在您的活动之后，您需要创建一个扩展Base Adapter的类。此类的主要内容是获取所需的数据（例如，从数组中获取）并将该信息膨胀到您创建的布局。我发现本教程可以帮助您：