我需要帮助如何通过Android应用程序中的网站更新数据。我通过网站获取了数据,但我没有任何想法或示例自动更改数据。
重新启动应用程序或Onclick的数据更改。请告诉我如何自动更新数据。
MainActivity.java
package com.example.exampleproject;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
RequestQueue requestQueue;
String showUrl = "http://wap2mob.net/rand.php";
TextView example;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
requestQueue = Volley.newRequestQueue(getApplicationContext());
example = (TextView) findViewById(R.id.example);
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST,
showUrl, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
System.out.println(response.toString());
try {
JSONArray success = response.getJSONArray("success");
for (int i = 0; i < success.length(); i++) {
JSONObject succes = success.getJSONObject(i);
example.setText(succes.getString("random"));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
System.out.append(error.getMessage());
}
});
requestQueue.add(jsonObjectRequest);
}
}
activity_main.xml中
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.exampleproject.MainActivity" >
<TextView
android:id="@+id/example"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="TextView" />
</RelativeLayout>