我正在创建一个 Android 应用程序，它拍摄照片并将其发送到 Ocr Web 服务（Microsoft Hawaii）；但是我遇到了一个很糟糕的问题.. 拍完照片后，应用程序崩溃了，但我不明白问题出在哪里，以及如何解决！代码是这样的：
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是这样的：
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
希望你能帮我！（如果我不能很好地解释这个问题，我很抱歉！）
非常感谢！
塞尔吉奥