Wyjątek NullPointerException podczas próby uzyskania identyfikatora URI z FileProvider (Android)

Question

Chcę zrobić zdjęcie po kliknięciu przycisku. Ale otrzymuję NullPointerException próbując uzyskać URI z FileProvider.

Oto moja ErrorCode:

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.PackageItemInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference 
     at android.support.v4.content.FileProvider.parsePathStrategy(FileProvider.java:583) 
    at android.support.v4.content.FileProvider.getPathStrategy(FileProvider.java:557) 
    at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:399) 

    at ibas.orosol.BildActivity.takePicture(BildActivity.java:86) 
    at java.lang.reflect.Method.invoke(Native Method)  
    at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)  
    at android.view.View.performClick(View.java:5637)  
    at android.view.View$PerformClick.run(View.java:22429)  
    at android.os.Handler.handleCallback(Handler.java:751)  
    at android.os.Handler.dispatchMessage(Handler.java:95)  
    at android.os.Looper.loop(Looper.java:154)  
    at android.app.ActivityThread.main(ActivityThread.java:6119)  
    at java.lang.reflect.Method.invoke(Native Method)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 

Problem-Line wydaje się być:

mUri = FileProvider.getUriForFile(getApplication().getApplicationContext(), 
      "ibas.provider", file); 

Here's mój Kod:

public void takePicture(View view) throws IOException { 

    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
    try{ 
     File file = createImageFile(); 

     mUri = FileProvider.getUriForFile(getApplication().getApplicationContext(), 
       "ibas.provider", file); 
     intent.putExtra(MediaStore.EXTRA_OUTPUT, mUri); 
     startActivityForResult(intent, REQUEST_IMAGE_CAPTURE); 
    } catch (IOException e){ 
     e.printStackTrace(); 
    } 

} 


private File createImageFile() throws IOException { 

    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
    String imageFileName = "JPEG_" + timeStamp + "_"; 
    File storageDir = getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM); 
    File image = File.createTempFile(
      imageFileName, /* prefix */ 
      ".jpg",   /* suffix */ 
      storageDir  /* directory */ 
    ); 

    // Save a file: path for use with ACTION_VIEW intents 
    mCurrentPhotoPath = "file:" + image.getAbsolutePath(); 
    return image; 
} 

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

    String path = "sdcard/orosol/captured_image.jpg"; 
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == Activity.RESULT_OK) { 
     Log.i("uri-data", "Uri: " + mUri.toString()); 


     mBitmap = getBitmapFromUri(mImageView,BildActivity.this,mUri); 


     mImageView.setImageBitmap(mBitmap); 
     mImageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 

    } 

} 

My Oczywisty:

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="ibas.orosol"> 

<uses-permission android:name="android.permission.CAMERA" /> 
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.CALL_PHONE" /> 

<uses-feature 
    android:name="android.hardware.camera" 
    android:required="false" /> 

<provider 
    android:name="android.support.v4.content.FileProvider" 
    android:authorities="ibas.provider" 
    android:exported="false" 
    android:grantUriPermissions="true"> 
    <meta-data 
     android:name="android.support.FILE_PROVIDER_PATHS" 
     android:resource="@xml/provider_paths" /> 
</provider> 

<!-- 
    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" /> 

<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/Theme.AppCompat.NoActionBar"> 
    <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=".MenuActivity" /> 
    <activity 
     android:name=".HeizoelActivity" 
     android:theme="@style/AppTheme"> 
     <meta-data 
      android:name="android.support.PARENT_ACTIVITY" 
      android:value=".MenuActivity" /> 
    </activity> 
    <activity 
     android:name=".BildActivity" 
     android:theme="@style/AppTheme"> 
     <meta-data 
      android:name="android.support.PARENT_ACTIVITY" 
      android:value=".MenuActivity" /> 
     > 
    </activity> 
    <activity 
     android:name=".FacebookActivity" 
     android:theme="@style/AppTheme"> 
     <meta-data 
      android:name="android.support.PARENT_ACTIVITY" 
      android:value=".MenuActivity" /> 
    </activity> 
    <!-- 
     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=".KontakteActivity" 
     android:theme="@style/AppTheme"> 
     <meta-data 
      android:name="android.support.PARENT_ACTIVITY" 
      android:value=".MenuActivity" /> 
    </activity> 
    <activity android:name=".UeberUnsActivity" 
     android:theme="@style/AppTheme"> 
     <meta-data 
      android:name="android.support.PARENT_ACTIVITY" 
      android:value=".MenuActivity" /> 
    </activity> 
</application> 

Provider w res/xml

<paths xmlns:android="http://schemas.android.com/apk/res/android"> 
<external-path name="external_files" path="."/> </paths> 

jakiś pomysł, gdzie ten problem występuje s?

Answer 1

Znacznik dostawcy znajduje się poza znacznikiem aplikacji w pliku manifestu.

Należy dodać go wewnątrz znacznika <application></application>

<provider 
    android:name="android.support.v4.content.FileProvider" 
    android:authorities="ibas.provider" 
    android:exported="false" 
    android:grantUriPermissions="true"> 
    <meta-data 
     android:name="android.support.FILE_PROVIDER_PATHS" 
     android:resource="@xml/provider_paths" /> 
</provider>