java.lang.RuntimeException：傳遞結果失敗ResultInfo {who = null，request = 100，result = -1，data = Intent} ...：java.lang.NullPointerException

我正在創建一個Android應用程序，照片並將其發送到Ocr網絡服務（Microsoft夏威夷）;但是我遇到了一個不好的問題..拍完照片後，應用程序崩潰了，但我不明白問題出在哪裏，以及如何解決它！的代碼是這樣的：java.lang.RuntimeException：傳遞結果失敗ResultInfo {who = null，request = 100，result = -1，data = Intent} ...：java.lang.NullPointerException

package your.Mobile; 

import java.io.ByteArrayOutputStream; 
import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.IOException; 
import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.Canvas; 
import android.graphics.Paint; 
import android.graphics.Rect; 
import android.location.GpsStatus; 
import android.location.GpsStatus.Listener; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.net.Uri; 
import android.os.Bundle; 
import android.provider.MediaStore; 
import android.util.Log; 

import android.view.View; 
import android.widget.ImageView; 

public class FotocameraActivity extends Activity { 


// dati che servono per la fotocamera 
private static final int CAMERA_REQUEST = 100; // un numero a nostro 
                           // piacimento 
File tmpFotoFile = null; 
byte[] bitmapdata; 
ImageView preview; 
LocationManager locationManager; 
String gps; 
final static String ARRAY_BYTE = "ARRAY_BYTE"; 
final static String GPS = "GPS"; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     locationManager = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE); 
     if(locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){ 
      startGpsTracking(); 
     } 

     try { 
       launchCamera(); 
     } catch (IOException e) { 
       throw new RuntimeException(e); 
     } 
} 

private void startGpsTracking() { 
    // TODO Auto-generated method stub 
    locationManager.addGpsStatusListener(gpsListener); 
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 500, 3, myLocationListener); 
} 

private Listener gpsListener = new Listener(){ 
    public void onGpsStatusChanged(int status){ 
     switch(status){ 
     case GpsStatus.GPS_EVENT_FIRST_FIX: 
      Log.d(LOCATION_SERVICE,"onGpsStatusChanged First Fix"); 
      break; 
     case GpsStatus.GPS_EVENT_SATELLITE_STATUS: 
      Log.d(LOCATION_SERVICE, "onGpsStatusChanged Satellite"); 
      break; 
     case GpsStatus.GPS_EVENT_STARTED: 
      Log.d(LOCATION_SERVICE, "onGpsStatusChanged Started"); 
      break; 
     case GpsStatus.GPS_EVENT_STOPPED: 
      Log.d(LOCATION_SERVICE, "onGpsStatusChanged Stopped"); 
      break; 
     } 
    } 
}; 

private LocationListener myLocationListener = new LocationListener(){ 

    public void onLocationChanged(Location location) { 
     // TODO Auto-generated method stub 
     double lng = location.getLongitude(), lat = location.getLatitude(); 
     gps += String.format("%6f", lng) + "#" + String.format("%6f", lat); 

    } 

    public void onProviderDisabled(String provider) { 
     // TODO Auto-generated method stub 

    } 

    public void onProviderEnabled(String provider) { 
     // TODO Auto-generated method stub 

    } 

    public void onStatusChanged(String provider, int status, Bundle extras) { 
     // TODO Auto-generated method stub 

    } 

}; 

private void launchCamera() throws IOException { 

     // Fase 1 
     tmpFotoFile = File.createTempFile("OCRPic", null); 

     Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
     cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); //Uri.fromFile(tmpFotoFile)); 
     startActivityForResult(cameraIntent, CAMERA_REQUEST); 
} 

protected void onActivityResult(int requestCode, int resultCode, Intent data) { 

     if (requestCode == CAMERA_REQUEST) { 
       Bitmap datifoto = null; 
       try { 
         datifoto = android.provider.MediaStore.Images.Media.getBitmap(this.getContentResolver(), android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); <------ Here is the error 
       } catch (FileNotFoundException e) { 
         throw new RuntimeException(e); 
       } catch (IOException e) { 
         throw new RuntimeException(e); 
       } 
       ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
       datifoto.compress(Bitmap.CompressFormat.JPEG, 100, bos); 
       bitmapdata = bos.toByteArray(); 
       //tmpFotoFile.delete(); 

       SimpleView view = new SimpleView(this, datifoto); // creo l'istanza 
                                 // // della                          // view... 
       setContentView(view); // e la setto 

       Intent intentRecognize = new Intent(this, RecognitionActivity.class); 
       intentRecognize.putExtra(ARRAY_BYTE, bitmapdata); 
       intentRecognize.putExtra(GPS, gps); 
       startActivity(intentRecognize); 
     } 

} 
} 


class SimpleView extends View{ 

private Bitmap bitmap; 
private Paint tmpPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 

public SimpleView(Context context, Bitmap bitmap) { 
     super(context); 
     this.bitmap = Bitmap.createScaledBitmap(bitmap,480,320,false);//ridimensiono l'immagine 
} 

@Override 
protected void onDraw(Canvas canvas){ 
super.onDraw(canvas); 
canvas.drawBitmap(bitmap, null , new Rect(0,0,getWidth(),getHeight()),tmpPaint); 
} 


}

而logcat的是這樣的：

02-05 16:41:50.321: E/AndroidRuntime(489): FATAL EXCEPTION: main 
02-05 16:41:50.321: E/AndroidRuntime(489): java.lang.RuntimeException: Failure    delivering result ResultInfo{who=null, request=100, result=-1, data=Intent { dat=content://media/external/images/media/1285 (has extras) }} to activity {your.Mobile/your.Mobile.FotocameraActivity}: java.lang.RuntimeException: java.io.FileNotFoundException: Multiple items at content://media/external/images/media 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.app.ActivityThread.deliverResults(ActivityThread.java:2984) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3027) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.app.ActivityThread.access$1100(ActivityThread.java:127) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1181) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.os.Handler.dispatchMessage(Handler.java:99) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.os.Looper.loop(Looper.java:137) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.app.ActivityThread.main(ActivityThread.java:4476) 
02-05 16:41:50.321: E/AndroidRuntime(489): at java.lang.reflect.Method.invokeNative(Native Method) 
02-05 16:41:50.321: E/AndroidRuntime(489): at java.lang.reflect.Method.invoke(Method.java:511) 
02-05 16:41:50.321: E/AndroidRuntime(489): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:816) 
02-05 16:41:50.321: E/AndroidRuntime(489): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:583) 
02-05 16:41:50.321: E/AndroidRuntime(489): at dalvik.system.NativeStart.main(Native Method) 
02-05 16:41:50.321: E/AndroidRuntime(489): Caused by: java.lang.RuntimeException: java.io.FileNotFoundException: Multiple items at content://media/external/images/media 
02-05 16:41:50.321: E/AndroidRuntime(489): at your.Mobile.FotocameraActivity.onActivityResult(FotocameraActivity.java:124) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.app.Activity.dispatchActivityResult(Activity.java:4820) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.app.ActivityThread.deliverResults(ActivityThread.java:2980) 
02-05 16:41:50.321: E/AndroidRuntime(489): ... 11 more 
02-05 16:41:50.321: E/AndroidRuntime(489): Caused by: java.io.FileNotFoundException: Multiple items at content://media/external/images/media 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:144) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.content.ContentProviderProxy.openTypedAssetFile(ContentProviderNative.java:612) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:628) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:557) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.content.ContentResolver.openInputStream(ContentResolver.java:392) 
02-05 16:41:50.321: E/AndroidRuntime(489): at android.provider.MediaStore$Images$Media.getBitmap(MediaStore.java:725) 
02-05 16:41:50.321: E/AndroidRuntime(489): at your.Mobile.FotocameraActivity.onActivityResult(FotocameraActivity.java:122) 
02-05 16:41:50.321: E/AndroidRuntime(489): ... 13 more

希望你能幫幫我！（對不起，如果我不能解釋問題非常好！）

非常感謝！

塞爾吉奧

來源

2013-02-05 Sergio Picheo

使用URI回報在onActivityResult從data intent得到getBitmap爲：

if (requestCode == CAMERA_REQUEST) { 
     Bitmap datifoto = null; 
     Uri picUri = data.getData();//<- get Uri here from data intent 
     if(picUri !=null){ 
     try { 
      datifoto = android.provider.MediaStore.Images.Media.getBitmap(
            this.getContentResolver(), 
            picUri); 
     } catch (FileNotFoundException e) { 
      throw new RuntimeException(e); 
     } catch (IOException e) { 
      throw new RuntimeException(e); 
     } 
    }

來源

2013-02-05 16:12:47

更安全的解決方案：**如果（數據！= NULL）**將保證機器人不同的古怪的東西版本 – MBH

java.lang.RuntimeException：傳遞結果失敗ResultInfo {who = null，request = 100，result = -1，data = Intent} ...：java.lang.NullPointerException

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