相同應用程序的部分工作，但一起工作

我的應用程序由2部分組成：一個用於本地化INDOOR和一個用於本地化OUTDOOR。另外，這些部件可以工作......但是當我將它們組合在一個大應用中時，OUTDOOR部件不再工作了！我不知道爲什麼... 你能幫我嗎？我寫的代碼：相同應用程序的部分工作，但一起工作

MAIN

package martina_cennamo.localization; 

import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 

public class MainActivity extends AppCompatActivity 
{ 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

//CERCO GLI ELEMENTI BUTTON E BUTTON2 

     Button OutDoor = (Button) findViewById(R.id.button); 
     Button InDoor = (Button) findViewById(R.id.button2); 

//CLICCANDO SU BUTTON FACCIO APRIRE UNA NUOVA ACTIVITY 

     OutDoor.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View arg0) { 
       //DEFINISCO L'INTENZIONE DI APRIRE UNA NUOVA ACTIVITY 
       Intent openActivityO=new Intent(MainActivity.this,ActivityO.class); 
       //APRO L'ACTIVITY ACTIVITYO.JAVA 
       startActivity(openActivityO); 

      } 
     }); 

//CLICCANDO SU BUTTON2 FACCIO APRIRE UNA NUOVA ACTIVITY 

     InDoor.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View arg0) { 

       Intent openActivityI=new Intent(MainActivity.this,ActivityI.class); 
       startActivity(openActivityI); 

      } 


     }); 
    } 

    //ALTRI OVERRIDE 
    @Override 
    public boolean onCreateOptionsMenu (Menu menu){ 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected (MenuItem item){ 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

}

ACTIVITYO（室外）

package martina_cennamo.localization; 

import android.content.Context; 
import android.content.Intent; 
import android.net.wifi.ScanResult; 
import android.net.wifi.WifiManager; 
import android.os.AsyncTask; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 


import org.jsoup.Jsoup; 
import org.jsoup.nodes.Document; 
import org.jsoup.nodes.Element; 
import org.jsoup.select.Elements; 

import java.io.IOException; 
import java.util.List; 



public class ActivityO extends AppCompatActivity { 

    public WifiManager wifi; 
    private String rete; 

    private String ssid1; 
    private String ssid2; 
    private String ssid3; 

    private int level1; 
    private int level2; 
    private int level3; 

    private String BSSID1; 
    private String BSSID2; 
    private String BSSID3; 

    private Document htmlDocument; 
    private TextView parsedHtmlNode; 
    private String html; 

    private TextView text; 
    private TextView text2; 
    private TextView text3; 
    private TextView retevicina; 

    Button indietro; 

    List<ScanResult> results; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_o); 

     parsedHtmlNode = (TextView) findViewById(R.id.html_content); 

     JsoupAsyncTask jsoupAsyncTask = new JsoupAsyncTask(); 
     jsoupAsyncTask.execute(); 

     text = (TextView) findViewById(R.id.textView2); 
     text2 = (TextView) findViewById(R.id.textView3); 
     text3 = (TextView) findViewById(R.id.textView4); 

     indietro = (Button)findViewById(R.id.indietro); 

     retevicina = (TextView) findViewById(R.id.textView7); 



     //TORNA ALLA HOME 
     indietro = (Button)findViewById(R.id.home); 

     indietro.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View arg0) { 

       Intent back=new Intent(ActivityO.this,MainActivity.class); 
       startActivity(back); 
      } 


     }); 
     //FINE 
    } 


    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     int id = item.getItemId(); 


     if (id == R.id.action_settings) { 
      return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 

    private class JsoupAsyncTask extends AsyncTask<Void, Void, Void> { 


     @Override 
     protected Void doInBackground(Void... params) { 


      wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE); 


      wifi.startScan(); 

      try { 
       Thread.sleep(3333); 
      } catch (InterruptedException e) { 
       e.printStackTrace(); 
      } 

      results = wifi.getScanResults(); 


      ScanResult result1 = results.get(0); 
      ssid1 = result1.SSID; 

      ScanResult result2 = results.get(1); 
      ssid2 = result2.SSID; 

      ScanResult result3 = results.get(2); 
      ssid3 = result3.SSID; 

      level1 = results.get(0).level; 
      level2 = results.get(1).level; 
      level3 = results.get(2).level; 

      BSSID1 = results.get(0).BSSID; 
      BSSID2 = results.get(1).BSSID; 
      BSSID3 = results.get(2).BSSID; 

//COME PRENDO LA RETE CON LA POTENZA MAGGIORE? 

      if (level1 >= level2 && level1 >= level3) { 

       rete = ssid1; 

      } else { 
       if (level2 >= level1 && level2 >= level3) { 
        rete = ssid2; 

       } else { 
        if (level3 >= level1 && level3 >= level2) { 
         rete = ssid3; 
        } 
       } 
      } 
//mostrare in una textview latitudine e longitudine 
      try { 

       htmlDocument = Jsoup.connect("http://geomena.org/essid/" + rete).userAgent("Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.172 Safari/537.22") 
         .timeout(30000).get(); 

//selezionare da html di ESSID/Vodafone - PROVA 

       for (Element body : htmlDocument.select("body")) { 
        for (Element div : body.select("div[id*=content]")) { 
         for (Element table : div.select("table")) { 
          for (Element tbody : table.select("tbody")) { 
           for (Element tr : tbody.select("tr:eq(0)")) { 
            Elements td = tr.select("td"); 
            html = td.get(3).text(); 

           } 
          } 
         } 


        } 
       } 

      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
      return null; 
     } 

     @Override 
     protected void onPostExecute(Void result) { 

      text.setText("SSID: " + ssid1 + " RSSI: " + level1 + "MAC: " + BSSID1); 
      text2.setText("SSID: " + ssid2 + " RSSI: " + level2 + "MAC: " + BSSID2); 
      text3.setText("SSID: " + ssid3 + " RSSI: " + level3 + "MAC: " + BSSID3); 

      parsedHtmlNode.setText(html); 

      retevicina.setText("La rete più vicina è " + rete); 
     } 
    } 
}

活性I（INDOOR_1）

package martina_cennamo.localization; 

import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 

public class ActivityI extends AppCompatActivity { 

    Button localizza; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_i); 

     localizza=(Button)findViewById(R.id.button3); 


     localizza.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View arg0) { 

       Intent Wifi=new Intent(ActivityI.this,ActivityWifi.class); 
       startActivity(Wifi); 

      } 


     }); 


    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_activity_i, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
}

ACTIVITY WIFI（INDOOR_2）

package martina_cennamo.localization; 

import android.content.Context; 
import android.content.Intent; 
import android.net.wifi.ScanResult; 
import android.net.wifi.WifiManager; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

import java.util.List; 

public class ActivityWifi extends AppCompatActivity { 

    public WifiManager wifi; 

    ImageView cucina; 
    ImageView soggiorno; 
    ImageView letto_1; 
    ImageView letto_2; 
    ImageView letto_3; 

    TextView posizione; 

    Button locate; 

    final Fingerprint f1= new Fingerprint(); 
    final Fingerprint f2= new Fingerprint(); 
    final Fingerprint f3= new Fingerprint(); 
    final Fingerprint f4= new Fingerprint(); 
    final Fingerprint f5= new Fingerprint(); 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_wifi); 

     f1.setStanza("Cucina"); 
     f2.setStanza("Soggiorno"); 
     f3.setStanza("Letto_1"); 
     f4.setStanza("Letto_2"); 
     f5.setStanza("Letto_3"); 

     for (int i=0;i<3;i++) { 

      f1.rete[i] = new Rete(); 
      f2.rete[i] = new Rete(); 
      f3.rete[i] = new Rete(); 
      f4.rete[i] = new Rete(); 
      f5.rete[i] = new Rete(); 
     } 
//IMPOSTO I VALORI DEI 3 WIFI PER OGNI STANZA 
     f1.rete[0].set_SSID("Vodafone-27661039"); 
     f1.rete[0].set_RSSI(-85); 
     f1.rete[1].set_SSID("NokiaWifi"); 
     f1.rete[1].set_RSSI(-53); 
     f1.rete[2].set_SSID("extender"); 
     f1.rete[2].set_RSSI(-69); 


     f2.rete[0].set_SSID("Vodafone-27661039"); 
     f2.rete[0].set_RSSI(-75); 
     f2.rete[1].set_SSID("NokiaWifi"); 
     f2.rete[1].set_RSSI(-67); 
     f2.rete[2].set_SSID("extender"); 
     f2.rete[2].set_RSSI(-44); 


     f3.rete[0].set_SSID("Vodafone-27661039"); 
     f3.rete[0].set_RSSI(-59); 
     f3.rete[1].set_SSID("NokiaWifi"); 
     f3.rete[1].set_RSSI(-79); 
     f3.rete[2].set_SSID("extender"); 
     f3.rete[2].set_RSSI(-58); 


     f4.rete[0].set_SSID("Vodafone-27661039"); 
     f4.rete[0].set_RSSI(-36); 
     f4.rete[1].set_SSID("NokiaWifi"); 
     f4.rete[1].set_RSSI(-84); 
     f4.rete[2].set_SSID("extender"); 
     f4.rete[2].set_RSSI(-70); 

     f5.rete[0].set_SSID("Vodafone-27661039"); 
     f5.rete[0].set_RSSI(-57); 
     f5.rete[1].set_SSID("NokiaWifi"); 
     f5.rete[1].set_RSSI(-84); 
     f5.rete[2].set_SSID("extender"); 
     f5.rete[2].set_RSSI(-42); 

     //EFFETTUO LA SCANSIONE DEI WIFI 
     wifi=(WifiManager) getSystemService(Context.WIFI_SERVICE); 
     for (int i=0;i<5;i++){ 

      wifi.startScan(); 
      try { 
       Thread.sleep(3333); 
      } catch (InterruptedException e) { 
       e.printStackTrace(); 
      } 

     } 

     List<ScanResult> results = wifi.getScanResults(); 

     if(results.size()<3){ 

      Toast.makeText(getApplicationContext(), "Hai trovato solo " + results.size() +"reti! Scansiona di nuovo!", Toast.LENGTH_LONG).show(); 
      finish(); 
     } 
     //FINE SCANSIONE 
     //TORNA ALLA LOCATE 
     locate = (Button)findViewById(R.id.locate); 

     locate.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View arg0) { 

       Intent openlocate = new Intent(ActivityWifi.this, ActivityI.class); 
       startActivity(openlocate); 
      } 


     }); 
     //FINE 
    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 

     cucina=(ImageView)findViewById(R.id.cucina); 
     soggiorno=(ImageView)findViewById(R.id.soggiorno); 
     letto_1=(ImageView)findViewById(R.id.letto_1); 
     letto_2=(ImageView)findViewById(R.id.letto_2); 
     letto_3=(ImageView)findViewById(R.id.letto_3); 
     posizione=(TextView)findViewById(R.id.posizione); 



     List<ScanResult> results = wifi.getScanResults(); 

     final Rete[] retiscansione = new Rete[results.size()]; 

     for(int i=0;i<results.size();i++){ 
      ScanResult sr=results.get(i); 
      retiscansione[i]=new Rete(); 
      retiscansione[i].set_SSID(sr.SSID); 
      retiscansione[i].set_RSSI(sr.level); 
     } 

     final int distanza1=f1.distanza(retiscansione); 
     final int distanza2=f2.distanza(retiscansione); 
     final int distanza3=f3.distanza(retiscansione); 
     final int distanza4=f4.distanza(retiscansione); 
     final int distanza5=f5.distanza(retiscansione); 

     double distanzamin = Math.min(Math.min(Math.min(distanza1, distanza2), Math.min(distanza3, distanza4)),distanza5); 

     if(distanzamin==distanza1){ 
      soggiorno.setVisibility(View.INVISIBLE); 
      letto_1.setVisibility(View.INVISIBLE); 
      letto_2.setVisibility(View.INVISIBLE); 
      letto_3.setVisibility(View.INVISIBLE); 

      posizione.setText("Sei nella stanza: "+f1.getStanza()); 
     } 
     if(distanzamin==distanza2){ 
      cucina.setVisibility(View.INVISIBLE); 
      letto_1.setVisibility(View.INVISIBLE); 
      letto_2.setVisibility(View.INVISIBLE); 
      letto_3.setVisibility(View.INVISIBLE); 

      posizione.setText("Sei nella stanza: "+f2.getStanza()); 
     } 
     if(distanzamin==distanza3){ 
      cucina.setVisibility(View.INVISIBLE); 
      soggiorno.setVisibility(View.INVISIBLE); 
      letto_2.setVisibility(View.INVISIBLE); 
      letto_3.setVisibility(View.INVISIBLE); 

      posizione.setText("Sei nella stanza: "+f3.getStanza()); 
     } 
     if(distanzamin==distanza4){ 
      cucina.setVisibility(View.INVISIBLE); 
      soggiorno.setVisibility(View.INVISIBLE); 
      letto_1.setVisibility(View.INVISIBLE); 
      letto_3.setVisibility(View.INVISIBLE); 

      posizione.setText("Sei nella stanza: "+f4.getStanza()); 
     } 
     if(distanzamin==distanza5){ 
      cucina.setVisibility(View.INVISIBLE); 
      soggiorno.setVisibility(View.INVISIBLE); 
      letto_1.setVisibility(View.INVISIBLE); 
      letto_2.setVisibility(View.INVISIBLE); 

      posizione.setText("Sei nella stanza: "+f5.getStanza()); 
     } 



    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_activity_wifi, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
}

指紋CLASS

package martina_cennamo.localization; 

/** 
* Created by pc1 on 01/11/2015. 
*/ 
public class Fingerprint 
{ 

    String stanza; 
    Rete[] rete = new Rete[3]; 
    public int a=0; 
    public int b=0; 
    public int c=0; 


    public void setStanza(String stanza) 
    { 
     this.stanza = stanza; 
    } 

    public String getStanza() 
    { 
     return stanza; 
    } 

    public int distanza(Rete[] trovate){ 


     int distanzacalcolata=0; 


     for(int i=0;i<trovate.length ;i++) 
     { 
      if (trovate[i].get_SSID().equals("Vodafone-27661039")) 
      {a=trovate[i].get_RSSI();} 
      if (trovate[i].get_SSID().equals("NokiaWifi")) 
      {b=trovate[i].get_RSSI();} 
      if (trovate[i].get_SSID().equals("extender")) 
      {c=trovate[i].get_RSSI();} 
     } 

     distanzacalcolata=(int)Math.sqrt(Math.pow(rete[0].get_RSSI()-a,2)+Math.pow(rete[1].get_RSSI()-b,2)+Math.pow(rete[2].get_RSSI()-c,2)); 

     return distanzacalcolata; 
    } 



}

RETE CLASS

package martina_cennamo.localization; 

/** 
* Created by pc1 on 01/11/2015. 
*/ 

public class Rete { 

    String SSID; 
    int RSSI; 

    public String get_SSID() 
    { 
     return this.SSID; 
    } 

    public int get_RSSI() 
    { 
     return this.RSSI; 
    } 

    public void set_SSID(String SSID) 
    { 
     this.SSID=SSID; 
    } 

    public void set_RSSI(int RSSI) 
    { 
     this.RSSI=RSSI; 
    } 



}

來源

2015-11-01 Martina

你得到的錯誤是什麼？ –

當我點擊按鈕「室外」（因爲我想打開ActivityO），應用程序崩潰！ – Martina

我整理了一下代碼，發現來了個戶外活動的兩個問題。

第一個問題是與indietro按鈕的空指針錯誤。您首先將它初始化爲一個名爲R.id.indietro的按鈕，然後切換到R.id.home。

indietro = (Button)findViewById(R.id.indietro); 
    ... 
    //TORNA ALLA HOME 
    indietro = (Button)findViewById(R.id.home);

取出第二個初始值設定項，它將起作用，或者確保按鈕名稱與要控制的按鈕相匹配。

第二個問題出現在我修復按鈕後。這是一個簡單的許可問題。確保您的清單中列出了INTERNET權限。

<uses-permission android:name="android.permission.INTERNET" />

這些事情做完後，應用程序沒有崩潰。

來源

2015-11-02 12:53:32 Frackinfrell

相同應用程序的部分工作，但一起工作

回答

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