0.0值

-1

我想通過我的距離和持續時間到下一個頁面，但結果顯示對於兩個0.0值

第一活動

 btnStop.setOnClickListener(new OnClickListener() 
    { 
     @Override 
     public void onClick(View v) { 
      startButtonClicked=false; 
      startDistance=false; 
      Double value=Double.valueOf(distance.getText().toString()); 
      Double durationValue=time; 
      Intent intent = new Intent(MainActivity.this, FinishActivity.class); 

      intent.putExtra("dist", value); 
      intent.putExtra("time",durationValue); 
      startActivity(intent); 
      finish(); 
     } 
    });

0.0

在它我印刷機後顯示

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_finish); 
    Bundle extras = getIntent().getExtras(); 
    if (extras != null) 
    { 
     Double value = extras.getDouble("dist"); 
     Double durationValue = extras.getDouble("time"); 
     displayDistance=(TextView)findViewById(R.id.finishDistance); 
       displayDistance.setText("Distance: " + value); 

     displayDuration=(TextView)findViewById(R.id.finishDuration); 
       displayDuration.setText("Duration: " + durationValue); 
     }

的應用程序崩潰的活動停止

這裏是我的完整Java代碼的第一個活動（第二隻顯示它們）。如果你都不願看到我是如何讓他們

public class MainActivity extends FragmentActivity implements LocationListener{ 

protected LocationManager locationManager; 
private GoogleMap googleMap; 
Button btnStartMove,btnPause,btnResume,btnStop; 
static double n=0; 
Long s1,r1; 
double dis=0.0; 
Thread t1; 
EditText userNumberInput; 
boolean bool=false; 
int count=0; 

double speed = 1.6; 
double lat1,lon1,lat2,lon2,lat3,lon3,lat4,lon4; 
double dist = 0; 
TextView distance; 
Button btnDuration; 
float[] result; 
private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES =1; // in Meters 
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 4000; //in milliseconds 
boolean startDistance = false; 
boolean startButtonClicked = false; 

MyCount counter; 
int timer = 0; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); 
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,MINIMUM_TIME_BETWEEN_UPDATES,MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, this); 
    if(isGooglePlay()) 
    { 
     setUpMapIfNeeded(); 
    } 
    distance=(TextView)findViewById(R.id.Distance); 
    btnDuration=(Button)findViewById(R.id.Duration); 
    btnStartMove=(Button)findViewById(R.id.Start);//start moving 
    btnStop=(Button)findViewById(R.id.Stop); 

    //prepare distance........... 
    Log.d("GPS Enabled", "GPS Enabled"); 
    Criteria criteria = new Criteria(); 
    criteria.setAccuracy(Criteria.ACCURACY_FINE); 
    String provider = locationManager.getBestProvider(criteria, true); 
    Location location=locationManager.getLastKnownLocation(provider); 

    btnStartMove.setOnClickListener(new OnClickListener() 
    { 
     @Override 
     public void onClick(View v) { 

      Log.d("GPS Enabled", "GPS Enabled"); 
      Criteria criteria = new Criteria(); 
      criteria.setAccuracy(Criteria.ACCURACY_FINE); 
      String provider = locationManager.getBestProvider(criteria, true); 
      Location location=locationManager.getLastKnownLocation(provider); 
      lat3 = location.getLatitude(); 
      lon3 = location.getLongitude(); 
      startButtonClicked=true; 
      counter= new MyCount(30000,1000); 
      counter.start(); 
      Toast.makeText(MainActivity.this, 
         "start is true",  
         Toast.LENGTH_LONG).show(); 
     } 
    }); 
    btnStop.setOnClickListener(new OnClickListener() 
    { 
     @Override 
     public void onClick(View v) { 
      startButtonClicked=false; 
      startDistance=false; 
      //String dis = (String) distance.getText(); 
      //Double dd = Double.parseDouble(dis); 
      Intent intent = new Intent(MainActivity.this, FinishActivity.class); 
      //DecimalFormat df = new DecimalFormat("#.##"); 
      //dist=(df.format(dd); 
      intent.putExtra("dist","value"); 
      //intent.putExtra("speed","speedValue"); 
      intent.putExtra("time","durationValue"); 
      startActivity(intent); 
      finish(); 
     } 
    }); 

    btnDuration.setOnClickListener(new OnClickListener() 
    { 
     @Override 
     public void onClick(View v) { 
      if(startButtonClicked=true) 
      { 
       double time=n*30+r1; 
       Toast.makeText(MainActivity.this,"Speed(m/s) :"+String.valueOf(dist/time)+"Duration :"+String.valueOf(time),Toast.LENGTH_LONG).show(); 
      }  
     } 
    }); 

    if(location!= null) 
    { 
     //Display current location in Toast 
     String message = String.format(
       "Current Location \n Longitude: %1$s \n Latitude: %2$s", 
       location.getLongitude(), location.getLatitude() 
     ); 
     Toast.makeText(MainActivity.this, message, 
       Toast.LENGTH_LONG).show(); 

     //Display current location in textview 
     //latitude.setText("Current Latitude: " + String.valueOf(location.getLatitude())); 
     //longitude.setText("Current Longitude: " + String.valueOf(location.getLongitude())); 
    } 
    else if(location == null) 
    { 
     Toast.makeText(MainActivity.this, 
       "Location is null",  
       Toast.LENGTH_LONG).show(); 
    } 


} 
private void setUpMapIfNeeded() { 

    if(googleMap == null) 
    { 
     Toast.makeText(MainActivity.this, "Getting map", 
       Toast.LENGTH_LONG).show(); 
     googleMap =((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.displayMap)).getMap(); 

     if(googleMap != null) 
     { 
      setUpMap(); 
     } 
    }a 

} 

private void setUpMap() 
{ 
    //Enable MyLocation Layer of Google Map 
    googleMap.setMyLocationEnabled(true); 

    //Get locationManager object from System Service LOCATION_SERVICE 
    //LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); 

    //Create a criteria object to retrieve provider 
    Criteria criteria = new Criteria(); 
    criteria.setAccuracy(Criteria.ACCURACY_FINE); 
    //Get the name of the best provider 
    String provider = locationManager.getBestProvider(criteria, true); 
    if(provider == null) 
    { 
     onProviderDisabled(provider); 
    } 
    //set map type 
    googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); 
    //Get current location 
    Location myLocation = locationManager.getLastKnownLocation(provider); 
    if(myLocation != null) 
    { 
     onLocationChanged(myLocation); 
    }  
    locationManager.requestLocationUpdates(provider, 0, 0, this); 
} 

private boolean isGooglePlay() 
{ 
    int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this); 

    if (status == ConnectionResult.SUCCESS) 
    { 

     Toast.makeText(MainActivity.this, "Google Play Services is available", 
       Toast.LENGTH_LONG).show(); 
     return(true); 
    } 
    else 
    { 
      GooglePlayServicesUtil.getErrorDialog(status, this, 10).show(); 

    } 
    return (false); 

} 

@Override 
public void onLocationChanged(Location myLocation) { 
    System.out.println("speed " + myLocation.getSpeed()); 

     //show location on map................. 
     //Get latitude of the current location 
     double latitude = myLocation.getLatitude(); 
     //Get longitude of the current location 
     double longitude = myLocation.getLongitude(); 
     //Create a LatLng object for the current location 
     LatLng latLng = new LatLng(latitude, longitude); 
     //Show the current location in Google Map 
     googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); 
     //Zoom in the Google Map 
     googleMap.animateCamera(CameraUpdateFactory.zoomTo(20)); 
     googleMap.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title("You are here!")); 

     //show distance............................ 
     if(startDistance == true) 
     { 

      Toast.makeText(MainActivity.this, 
         "Location has changed",  
         Toast.LENGTH_LONG).show(); 
       if(myLocation != null) 
       { 
        //latitude.setText("Current Latitude: " + String.valueOf(loc2.getLatitude())); 
        //longitude.setText("Current Longitude: " + String.valueOf(loc2.getLongitude())); 
        float[] results = new float[1]; 
        Location.distanceBetween(lat3, lon3, myLocation.getLatitude(), myLocation.getLongitude(), results); 
        System.out.println("Distance is: " + results[0]);    

        dist += results[0];    
        DecimalFormat df = new DecimalFormat("#.##"); // adjust this as appropriate 
       if(count==1) 
       { 
        distance.setText(df.format(dist) + "meters"); 
       } 
        lat3=myLocation.getLatitude(); 
        lon3=myLocation.getLongitude(); 
        count=1; 
       } 

     } 
     if(startButtonClicked == true) 
     { 
      startDistance=true; 
     } 

    //} 


} 

@Override 
public void onProviderDisabled(String provider) { 
    Toast.makeText(MainActivity.this, 
      "Provider disabled by the user. GPS turned off", 
      Toast.LENGTH_LONG).show(); 
} 

@Override 
public void onProviderEnabled(String provider) { 
    Toast.makeText(MainActivity.this, 
      "Provider enabled by the user. GPS turned on", 
      Toast.LENGTH_LONG).show(); 
} 

@Override 
public void onStatusChanged(String provider, int status, Bundle extras) { 
    Toast.makeText(MainActivity.this, "Provider status changed", 
      Toast.LENGTH_LONG).show(); 
} 
@Override 
protected void onPause() { 
super.onPause(); 
locationManager.removeUpdates(this); 
} 
@Override 
protected void onResume() { 
    super.onResume(); 
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,MINIMUM_TIME_BETWEEN_UPDATES,MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, this); 
} 
public class MyCount extends CountDownTimer{ 
    public MyCount(long millisInFuture, long countDownInterval) { 
    super(millisInFuture, countDownInterval); 
    } 
    @Override 
    public void onFinish() { 
     counter= new MyCount(30000,1000); 
    counter.start(); 
    n=n+1; 
    } 
    @Override 
    public void onTick(long millisUntilFinished) { 
     s1=millisUntilFinished; 
     r1=(30000-s1)/1000; 
     //e1.setText(String.valueOf(r1)); 


    } 
}}

來源

2014-02-07 Myst

這裏是你的問題：你是通過意圖傳遞字符串值，當你希望在雙打第二個......

 Intent intent = new Intent(MainActivity.this, FinishActivity.class); 
     intent.putExtra("dist","value"); 
     intent.putExtra("time","durationValue"); 
     startActivity(intent);

來源

2014-02-07 13:50:03 Ranjit

[編輯]我假設你有2 EditText s允許用戶輸入數據。可以說他們是editText1 & editText2。
EditText s舉行Strings所以你需要轉換/施放它們。

Double value=Double.valueOf(editText1.getText().toString()); 
Double durationValue=Double.valueOf(editText2.getText().toString());

另外，還要確保你進入只在EditTexts數字。

在你FirstActivity你逝去的Strings代替Doubles。
所以不是你應該使用這樣的：

intent.putExtra("dist",value); 
intent.putExtra("time",durationValue);

只是省略了雙引號" "。
通知，值和durationValue是必須在你的代碼Doubles。
希望它有助於。

來源

2014-02-07 13:55:21 SMR

它說，當我拿走「」時，值不能解析爲變量。 value和durationValue都不會在我的代碼中啓動。在我遵循的例子中，我說必須把它放進去，但是可以識別dist和time。當我「」的價值和聯合國「」dist它有錯誤，方法putExtra（字符串，布爾）在類型意圖不適用於參數（雙，字符串） – Myst

我編輯了答案，所以看看如果現在有效，請立即投入並接受。：D – SMR

如我的上面的代碼所示，我的dist和time都是代碼中生成的雙打，dist已經在textview中顯示，但只是在烤麪包的時候顯示。但在轉換之前，兩者都只是雙打。所以我按照最適合你的例子修改我的代碼，但是當我點擊停止按鈕時，它會崩潰。日誌貓消失，我不知道如何檢索。（我是新手）那麼第二頁呢？所以我getDouble（價值）/或（dist），因爲價值存儲在價值中。 – Myst

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