Question

我试图在Android应用程序中显示json内容，但它不是在阅读它。我希望它在第一页的json文件中获取“statusmessage”并将其发送到下一页并使用sharedpefrences显示。但它返回“anon”作为值而不是“Hi +2348055550055，将收取N20.00的访问费用以访问此平台”。在mainactivity.java中的对话框中。我没有错误消息，它不仅仅是返回值。

这是json文件

{headers: 
[{
id: "4",
name: "GLO",
code: "GLO",
status: "Inactive",
statusMessage: "Hi +2348055550055, an ACCESS FEE of N20.00 will be charged in order to access this Platform"
}]
}

这是我的主要java类

package com.mall.first;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.Window;
import android.widget.ImageView;
import android.widget.Toast;

import com.squareup.picasso.Picasso;

import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

public class ActivitySplash extends Activity {
    private ProgressDialog pDialog;
    int flag=0;

    JSONParser jsonParser = new JSONParser();
    private static final String api = "http://10.0.2.2/angl/com.php";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.splash);
       ImageView image =    (ImageView)findViewById(R.id.image1);

        Picasso.with(getBaseContext()).load("http://api.dobox.tv/img/gloSplashScreen.png").into(image);

        new CountDownTimer(5000,1000) {

            @Override
            public void onFinish() {
          new loginAccess().execute();
                Intent intent = new Intent(getBaseContext(), MainActivity.class);

                startActivity(intent);

                finish();

            }
            @Override
            public void onTick(long millisUntilFinished) {

            }
        }.start();

    }

    class loginAccess extends AsyncTask<String, String, Boolean> {

        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(ActivitySplash.this);
            pDialog.setMessage("Login...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }
        @Override
        protected Boolean doInBackground(String... arg0) {
            // TODO Auto-generated method stub
            // Check for success tag
            int success;


            try {

                List<NameValuePair> params = new ArrayList<NameValuePair>();


                Log.d("request!", "starting");

                JSONObject json = jsonParser.getJSONFromUrl(api);
                // check your log for json response
                Log.d("Login attempt", json.toString());

                JSONArray categories = json.getJSONArray("headers");

                for (int i = 0; i < categories.length(); i++) {
                    String state = categories.getJSONObject(i).getString("state");
                    String status = categories.getJSONObject(i).getString("status");

                    SharedPreferences sp = PreferenceManager
                            .getDefaultSharedPreferences(ActivitySplash.this);
                    SharedPreferences.Editor edit = sp.edit();
                    edit.putString("state", state);

                    edit.putString("status", status);

                    edit.commit();


                    // Close all views
                }
            }catch (Throwable e){
                e.printStackTrace();
            }
            return true;
        }
        protected void onPostExecute(Boolean file_url) {
            pDialog.dismiss();
            if(flag==1)
                Toast.makeText(ActivitySplash.this,"Please Enter Correct informations", Toast.LENGTH_LONG).show();

        }

    }
}

这是我的第二堂课

package com.mall.first;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.Window;
import android.widget.ImageView;
import android.widget.Toast;

import com.squareup.picasso.Picasso;

import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends SherlockFragmentActivity {


    DrawerLayout mDrawerLayout;
    ListView mDrawerList;
    ActionBarDrawerToggle mDrawerToggle;
    MenuListAdapter mMenuAdapter;
    String[] titl;
    Button pend;
    int[] icon;
    String pic;
    Fragment menus = new Menus();

        TextView mystatu,myuser,nick,status;

        public static final String PREFS_NAME = "LoginPrefs";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.drawer_main);
        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
        status = sp.getString("status", "anon");

        root();

}



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getSupportMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        if (item.getItemId() == android.R.id.home) {

            if (mDrawerLayout.isDrawerOpen(mDrawerList)) {
                mDrawerLayout.closeDrawer(mDrawerList);
            } else {
                mDrawerLayout.openDrawer(mDrawerList);
            }
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);

        mDrawerToggle.onConfigurationChanged(newConfig);
    }
    public void root(){
        LayoutInflater li = LayoutInflater.from(MainActivity.this);
        View promptsView = li.inflate(R.layout.prompts, null);

        final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
                MainActivity.this);

        alertDialogBuilder.setView(promptsView);




        alertDialogBuilder
                .setCancelable(false)
                .setMessage(status)
                .setPositiveButton("OK",
                        new DialogInterface.OnClickListener() {

                            public void onClick(DialogInterface dialog, int id) {

                                Toast.makeText(MainActivity.this, "payment has been done", Toast.LENGTH_SHORT).show();
                            }
                        })
                .setNegativeButton("Cancel",
                        new DialogInterface.OnClickListener() {

                            public void onClick(DialogInterface dialog, int id) {

                                System.exit(0);
                            }
                        });


        AlertDialog alertDialog = alertDialogBuilder.create();

        alertDialog.show();
    }

}

Answer 1

CountDownTimer-＆gt; OnFinish中的代码是错误的，因为您在完成asynctask之前打开了intent。您应该将意图移动到asynctask的OnPostExecute方法。这样，您可以确保在打开MainActivity之前在sharedPreferences上写入状态。

Base& Base::base=Base::getBaseInstance();

在android中显示json数据？

1 个答案: