【发布时间】：2015-12-31 10:03:15
【问题描述】：
我正在尝试将来自MySQL 服务器的数据显示到 android，但没有显示任何数据。
数据无法检索到 Android ListView。但我可以看到
数据显示在我的本地主机上。
检索信息
String myJSON;
JSONArray information = null;
ArrayList<HashMap<String, String>> infoList;
infoList = new ArrayList<HashMap<String, String>>();
listView = (ListView) findViewById(R.id.listView2);
public void getData() {
class GetDataJSON extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... params) {
DefaultHttpClient httpclient = new DefaultHttpClient(new BasicHttpParams());
HttpPost httppost = new HttpPost("http://192.168.107.115:80/Android/CRUD/retrieveInformation.php");
// Depends on your web service
httppost.setHeader("Content-type", "application/json");
InputStream inputStream = null;
String result = null;
try {
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
inputStream = entity.getContent();
// json is UTF-8 by default
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
result = sb.toString();
} catch (Exception e) {
// Oops
}
finally {
try{if(inputStream != null)inputStream.close();}catch(Exception squish){}
}
return result;
}
@Override
protected void onPostExecute(String result){
myJSON=result;
showList();
}
}
GetDataJSON g = new GetDataJSON();
g.execute();
}
protected void showList(){
try {
JSONObject jsonObj = new JSONObject(myJSON);
information = jsonObj.getJSONArray(Config.TAG_RESULTS);
for(int i=0;i<information.length();i++){
JSONObject c = information.getJSONObject(i);
String date = c.getString(Config.TAG_DATE);
Toast.makeText(getApplicationContext(),date,Toast.LENGTH_LONG).show();
String timeIn = c.getString(Config.TAG_TiME_IN);
Toast.makeText(getApplicationContext(),timeIn,Toast.LENGTH_LONG).show();
String timeOut = c.getString(Config.TAG_TIME_OUT);
HashMap<String,String> info = new HashMap<String,String>();
info.put(Config.TAG_DATE, date);
info.put(Config.TAG_TiME_IN, timeIn);
info.put(Config.TAG_TIME_OUT,timeOut);
infoList.add(info);
}
ListAdapter adapter = new SimpleAdapter(
HomePage.this, infoList, R.layout.retrieve_data,
new String[]{Config.TAG_DATE,Config.TAG_TiME_IN,Config.TAG_TIME_OUT},
new int[]{R.id.date,R.id.timeIn,R.id.timeOut}
);
listView.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
retrieveInformation.php
<?php
define('HOST','127.0.0.1:3307');
define('USER','root');
define('PASS','');
define('DB','androiddb');
$con = mysqli_connect(HOST,USER,PASS,DB) or die('unable to connect');
$sql = "select * from information";
$res = mysqli_query($con,$sql);
$result=array();
while($row=mysqli_fetch_array($res)){
array_push($result,array('id'=>$row[0],'name'=>$row[1],'weather'=>$row[2],'date'=>$row[3],'status'=>$row[4],
'time_in'=>$row[5], 'time_out'=>$row[6]));
}
echo (json_encode(array("result"=>$result)));
mysqli_close($con);
?>
浏览器
retrieve_data.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="start"
android:background="@android:color/white"
android:padding="12dp">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/image"
android:layout_centerVertical="true"
android:paddingLeft="6dp"
android:orientation="vertical"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/l21"
android:orientation="horizontal"
android:maxLines="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="210dp"
android:textSize="10dp"
android:id="@+id/date"/>
</LinearLayout>
<LinearLayout
android:id="@+id/ll2"
android:layout_below="@+id/l21"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/TimeIn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp"
android:textColor="@android:color/secondary_text_dark_nodisable"
android:text="Time In : "
android:maxLines="1"
android:ellipsize="end" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/timeIn" />
</LinearLayout>
<LinearLayout
android:id="@+id/ll3"
android:layout_below="@+id/ll2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp"
android:textColor="@android:color/secondary_text_dark_nodisable"
android:text="Time Out : "
android:maxLines="1"
android:layout_below="@+id/TimeIn"
android:id="@+id/TimeOut" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/timeOut"
android:layout_toRightOf="@+id/TimeOut"/>
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
【问题讨论】：
-
嗨。我有几个问题。首先检查您从服务器获得的响应。下一个检查天气是否将命中服务器。下一个更改本地 ip 并保持全局 ip跨度>
-
有没有我可以检查是否有数据检索到showlist()？
-
在浏览器上打开 php 文件以查看它产生的输出，您也可以使用 POSTman chrome 扩展来检查请求/响应
-
同样在 Android 中，您可以使用 EntityUtil 类作为 String responseBody = EntityUtils.toString(response.getEntity()); 读取一行代码中的响应。这将比使用输入流和使用循环更好
-
数据显示在浏览器上
标签： php android mysql listview