为了获取数据，我使用 Volley 库。当我使用本地地址时，一切正常。我的活动显示数据。
String json_url = "http://192.168.1.4/android/contactinfo.php";
但是当我从 Web 服务器（互联网）获取数据时，我的活动没有显示任何内容，因此它是空的，没有任何错误
String json_url = "http://www.viratebco.com/phpme/3/1.php";
我比较了这两个页面的输出，它们彼此完全相同。
这是我的 php 代码
<?php
error_reporting(0);
@ini_set('display_errors', 0);
$host="localhost";
$username="root";
$pwd="";
$db="android";
$con = mysqli_connect($host,$username,$pwd,$db) or die ('unable to connect');
mysqli_set_charset($con, "utf8");
$sql = "SELECT * FROM imageactor";
$result = mysqli_query($con,$sql);
$response = array();
while($row = mysqli_fetch_array($result))
{
array_push($response,array("Name"=>$row["name"],"Pic"=>$row["pic"],"Description"=>$row["description"]));
}
header("Connection: Keep-alive");
header("Content-length: 468");
header('Content-type: application/json');
echo json_encode($response,JSON_UNESCAPED_UNICODE);
这是我用于获取服务器数据的类
public class BackgrundTask {
Context context;
ArrayList<Contact_actors_list> arrayList = new ArrayList<>();
String json_url = "http://192.168.1.4/phpme/3/1.php";
public BackgrundTask (Context context)
{
this.context = context;
}
public ArrayList<Contact_actors_list> getList()
{
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.POST, json_url,(String) null,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d("TAG67", response.toString());
int count = 0;
while (count<response.length())
{
try {
// Log.d("TAG67", "kk"+count);
JSONObject jsonObject = response.getJSONObject(count);
// Log.d("TAG67", "Pic "+jsonObject.getString("Pic"));
// Log.d("TAG67", "Description "+jsonObject.getString("Description"));
// Log.d("TAG67", "Name "+jsonObject.getString("Name"));
Contact_actors_list contact_actors_list = new Contact_actors_list(jsonObject.getString("Name"),jsonObject.getString("Pic"),jsonObject.getString("Description"));
Log.d("TssssssssAG67", contact_actors_list.getDescription());
arrayList.add(contact_actors_list);
count++;
} catch (JSONException e) {
e.printStackTrace();
Log.e("tageiu", "Error at sign in : " + e.getMessage());
}
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
Log.e("ERtROR123", "Error123 "+ error.getMessage());
Log.d("ERtROR123", "Error123 "+ error.getMessage());
}
}
);
int x=4;// retry count
jsonArrayRequest.setRetryPolicy(new DefaultRetryPolicy(DefaultRetryPolicy.DEFAULT_TIMEOUT_MS * 48,
x, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
MySingleton.getmInstance(context).addToRequestque(jsonArrayRequest);
return arrayList;
}
}
我的单例类
public class MySingleton {
private static MySingleton mInstance;
private RequestQueue requestQueue;
private static Context mCtx;
private MySingleton(Context context){
mCtx = context;
requestQueue = getRequestQueue();
}
public RequestQueue getRequestQueue()
{
if (requestQueue==null)
{
requestQueue = Volley.newRequestQueue(mCtx.getApplicationContext());
}
return requestQueue;
}
public static synchronized MySingleton getmInstance(Context context)
{
if (mInstance == null)
{
mInstance = new MySingleton(context);
}
return mInstance;
}
public <T> void addToRequestque(Request<T> request)
{
request.setRetryPolicy(new DefaultRetryPolicy(0, -1, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
requestQueue.add(request);
}
}
我的演员列表页
public class actorsList extends AppCompatActivity {
RecyclerView recyclerView;
RecyclerView.Adapter adapter;
RecyclerView.LayoutManager layoutManager;
ArrayList<Contact_actors_list> arrayList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_actors_list);
System.setProperty("http.keepAlive", "false");
recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
recyclerView.addOnItemTouchListener(
new RecyclerItemClickListener(actorsList.this, recyclerView ,new RecyclerItemClickListener.OnItemClickListener() {
@Override public void onItemClick(View view, int position) {
Intent intent = new Intent(actorsList.this, DetailsAsctor.class);
Contact_actors_list pp = arrayList.get(position);
intent.putExtra("pic", pp.getPic());
intent.putExtra("title", pp.getName());
startActivity(intent);
//Toast.makeText(actorsList.this,position,Toast.LENGTH_LONG).show();
}
@Override public void onLongItemClick(View view, int position) {
Toast.makeText(actorsList.this,"click",Toast.LENGTH_LONG).show();
}
})
);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setHasFixedSize(true);
BackgrundTask backgroundTask = new BackgrundTask(actorsList.this);
arrayList = backgroundTask.getList();
adapter = new RecyclerAdapterActorsList(arrayList);
recyclerView.setAdapter(adapter);
}
}
RecyclerAdapterActors列表
public class RecyclerAdapterActorsList extends RecyclerView.Adapter<RecyclerAdapterActorsList.MyViewHolder> {
ArrayList<Contact_actors_list> arrayList = new ArrayList<>();
public RecyclerAdapterActorsList(ArrayList<Contact_actors_list> arrayList)
{
this.arrayList = arrayList;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_item_actors_list,parent,false);
MyViewHolder myViewHolder = new MyViewHolder(view);
return myViewHolder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
holder.Name1.setText(arrayList.get(position).getName());
holder.Description1.setText(arrayList.get(position).getDescription());
Picasso.with(holder.Pic1.getContext()).load(Uri.parse(arrayList.get(position).getPic())).into(holder.Pic1);
}
@Override
public int getItemCount() {
return arrayList.size();
}
public static class MyViewHolder extends RecyclerView.ViewHolder
{
TextView Name1;
TextView Description1;
ImageView Pic1;
public MyViewHolder(View itemView) {
super(itemView);
Name1 = (TextView) itemView.findViewById(R.id.name);
Description1 = (TextView) itemView.findViewById(R.id.description);
Pic1 = (ImageView) itemView.findViewById(R.id.pic);
}
}
}
我的应用程序工作正常，但只是当我从本地服务获取数据时。
