ファイヤーベースのストレージに画像をアップロードできません

Question

ファイヤーベースのストレージに画像をアップロードしようとしています。キャプチャボタンを押すと、アプリケーションがクラッシュし、このエラーが発生します。 java.lang.NullPointerException：仮想メソッド 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData（android.content。私のコードではnullのオブジェクト参照のpm.PackageManager、java.lang.Stringで）」

このライン上のUri photoURI = FileProvider.getUriForFile(this, "com.faum.faum_expert.fileprovider", photoFile);

：

private ImageView ivKitchen1,ivKitchen2,ivKitchen3; 
private Button btnCapture1,btnCapture2,btnCapture3; 
private TextView tvKitchenSnaps; 

private StorageReference snapsStorage; 

private static final int CAMERA_REQUEST_CODE = 1; 

private ProgressDialog mProgress; 

private Uri filepath; 



String mCurrentPhotoPath; 

private File createImageFile() throws IOException { 
    // Create an image file name 
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
    String imageFileName = "JPEG_" + timeStamp + "_"; 
    File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES); 
    File image = File.createTempFile(
      imageFileName, /* prefix */ 
      ".jpg",   /* suffix */ 
      storageDir  /* directory */ 
    ); 

    mCurrentPhotoPath = "file:" + image.getAbsolutePath(); 
    return image; 
} 

private void dispatchTakePictureIntent() { 
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
    // Ensure that there's a camera activity to handle the intent 
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) { 
     // Create the File where the photo should go 
     File photoFile = null; 
     try { 
      photoFile = createImageFile(); 
     } catch (IOException ex) { 
     } 
     if (photoFile != null) { 
      Uri photoURI = FileProvider.getUriForFile(this, 
        "com.faum.faum_expert.fileprovider", 
        photoFile); 
      takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI); 
      startActivityForResult(takePictureIntent, CAMERA_REQUEST_CODE); 
     } 
    } 
} 

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

    snapsStorage = FirebaseStorage.getInstance().getReference(); 


    ivKitchen1 = (ImageView)findViewById(R.id.ivKitchen1); 

    btnCapture1 = (Button)findViewById(R.id.btnCapture1); 

    mProgress = new ProgressDialog(this); 

    btnCapture1.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      startActivityForResult(intent, CAMERA_REQUEST_CODE);*/ 

      dispatchTakePictureIntent(); 
     } 
    }); 
} 
@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 


    if(requestCode == CAMERA_REQUEST_CODE && resultCode == RESULT_OK){ 
     mProgress.setMessage("Uploading..."); 
     mProgress.show(); 
     Uri uri = data.getData(); 

     StorageReference filepath = snapsStorage.child("Photos").child(uri.getLastPathSegment()); 
     filepath.putFile(uri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() { 
      @Override 
      public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) { 
       Toast.makeText(Kitchen_Snaps.this, "Upload Successful!", Toast.LENGTH_SHORT).show(); 
       mProgress.dismiss(); 
      } 
     }).addOnFailureListener(new OnFailureListener() { 
      @Override 
      public void onFailure(@NonNull Exception e) { 
       Toast.makeText(Kitchen_Snaps.this, "Upload Failed!", Toast.LENGTH_SHORT).show(); 
      } 
     }); 
    } 
} 

マニフェストファイル

<?xml version="1.0" encoding="utf-8"?> 

<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> 
<uses-permission android:name="android.permission.CAMERA" /> 

<!-- 
    The ACCESS_COARSE/FINE_LOCATION permissions are not required to use 
    Google Maps Android API v2, but you must specify either coarse or fine 
    location permissions for the 'MyLocation' functionality. 
--> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 

<!-- 
- 
<provider 
    android:name="android.support.v4.content.FileProvider" 
    android:authorities="com.faum.faum_expert.fileprovider" 
    android:exported="false" 
    android:grantUriPermissions="true"> 
    <meta-data 
     android:name="android.support.FILE_PROVIDER_PATHS" 
     android:resource="@xml/file_paths"></meta-data> 
</provider> 
--> 
<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:roundIcon="@mipmap/ic_launcher_round" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme"> 
    <activity android:name=".MainActivity"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity android:name=".Social_Connect" /> 
    <activity android:name=".User_sign" /> 

    <meta-data 
     android:name="com.facebook.sdk.ApplicationId" 
     android:value="@string/facebook_app_id" /> 

    <activity android:name=".Personal_Information" /> 
    <activity android:name=".Contact_Infrormation" /> 
    <!-- 
     The API key for Google Maps-based APIs is defined as a string resource. 
     (See the file "res/values/google_maps_api.xml"). 
     Note that the API key is linked to the encryption key used to sign the APK. 
     You need a different API key for each encryption key, including the release key that is used to 
     sign the APK for publishing. 
     You can define the keys for the debug and release targets in src/debug/ and src/release/. 
    --> 
    <meta-data 
     android:name="com.google.android.geo.API_KEY" 
     android:value="@string/google_maps_key" /> 

    <activity 
     android:name=".MapsActivity" 
     android:label="@string/title_activity_maps" /> 
    <activity android:name=".Kitchen_Snaps" /> 
    <activity 
     android:name=".Navigation_Drawer" 
     android:label="@string/title_activity_navigation__drawer" 
     android:theme="@style/AppTheme" /> 
    <activity android:name=".New_Deal" /> 
    <activity android:name=".New_Deal_Time" /> 
    <activity android:name=".New_Deal_List" /> 
    <activity android:name=".New_Deal_Confirmation"></activity> 
</application> 

Answer 1

私が思うに、あなたが最初 で許可を確認する必要があり、私はそれがここ に役立ちます願っています完全なソースコード

public static final int MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE = 123; 

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

    snapsStorage = FirebaseStorage.getInstance().getReference(); 


    ivKitchen1 = (ImageView)findViewById(R.id.ivKitchen1); 

    btnCapture1 = (Button)findViewById(R.id.btnCapture1); 

    mProgress = new ProgressDialog(this); 

    btnCapture1.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      //startActivityForResult(intent, CAMERA_REQUEST_CODE);*/ 

      //dispatchTakePictureIntent(); 
      if (checkPermission(YourActivity.class)) 
       cameraIntent(); 
     } 
    }); 
} 

@Override 
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { 
    switch (requestCode) { 
     case MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE: 
      if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
       cameraIntent(); 
      } 

      break; 
    } 
} 


@TargetApi(Build.VERSION_CODES.JELLY_BEAN) 
public static boolean checkPermission(final Context context) 
{ 
    int currentAPIVersion = Build.VERSION.SDK_INT; 
    if(currentAPIVersion>=android.os.Build.VERSION_CODES.M) 
    { 
     if (ContextCompat.checkSelfPermission(context, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { 
      if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) context, Manifest.permission.READ_EXTERNAL_STORAGE)) { 
       AlertDialog.Builder alertBuilder = new AlertDialog.Builder(context); 
       alertBuilder.setCancelable(true); 
       alertBuilder.setTitle("Permission necessary"); 
       alertBuilder.setMessage("External storage permission is necessary"); 
       alertBuilder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() { 
        @TargetApi(Build.VERSION_CODES.JELLY_BEAN) 
        public void onClick(DialogInterface dialog, int which) { 
         ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE); 
        } 
       }); 
       AlertDialog alert = alertBuilder.create(); 
       alert.show(); 

      } else { 
       ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE); 
      } 
      return false; 
     } else { 
      return true; 
     } 
    } else { 
     return true; 
    } 
} 

private void cameraIntent() { 
    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
    if (cameraIntent.resolveActivity(getPackageManager()) != null) { 
     // Create the File where the photo should go 
     File photoFile = null; 
     try { 
      photoFile = createImageFile(SetupProfileActivity.this); 
     } catch (IOException ex) { 
      Log.i(TAG, "IOException"); 
     } 

     //For Android SDk 24+, 7.0 
     if (photoFile != null) { 
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { 
       mPhotoUri = FileProvider.getUriForFile(this, getPackageName() + ".provider", photoFile); 

       List<ResolveInfo> resInfoList = getPackageManager().queryIntentActivities(cameraIntent, PackageManager.MATCH_DEFAULT_ONLY); 
       for (ResolveInfo resolveInfo : resInfoList) { 
        String packageName = resolveInfo.activityInfo.packageName; 
        grantUriPermission(packageName, mPhotoUri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION); 
       } 
      } else { 
       mPhotoUri = Uri.fromFile(photoFile); 
      } 

      //mPhotoUri = Uri.fromFile(photoFile); 
      cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, mPhotoUri); 
      startActivityForResult(cameraIntent, REQUEST_CAMERA); 
     } 
    } 
}