Android Lire les images Autorisation Stockage externe

Question

Je souhaite lire et enregistrer des images/bitmaps à partir du stockage interne.

Dans ma mise en page j'ai un bouton et une imageview. Lorsque je clique sur le bouton, je veux choisir une image de la galerie pour l'enregistrer. Lorsque je clique sur l'image, je veux que l'image sauvegardée soit affichée.

Thats ce que j'ai essayé:

Mise en page:

<Button 
     android:id="@+id/button" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_marginLeft="80dp" 
     android:layout_marginRight="80dp" 
     android:text="Upload Image" 
     android:onClick="onClickUpload" 
     android:layout_marginBottom="30dp" /> 

    <ImageView 
     android:id="@+id/imgPicker" 
     android:layout_width="200dp" 
     android:layout_height="200dp" 
     android:layout_marginTop="15dp" 
     android:layout_marginLeft="30dp" 
     android:layout_marginRight="30dp" 
     android:onClick="onClickShow" 
     app:srcCompat="@android:color/holo_orange_dark" /> 

fonction de lecture avec demander la permission

public void onClickUpload(View view) { 

    // request permission to read external storage (explicit necessary since API Level 23) 

    // Here, thisActivity is the current activity 
    if (ContextCompat.checkSelfPermission(DetailActivity.this, 
      Manifest.permission.READ_EXTERNAL_STORAGE) 
      != PackageManager.PERMISSION_GRANTED) { 

     // Should we show an explanation? 
     if (ActivityCompat.shouldShowRequestPermissionRationale(DetailActivity.this, 
       Manifest.permission.READ_EXTERNAL_STORAGE)) { 

      // Show an explanation to the user *asynchronously* -- don't block 
      // this thread waiting for the user's response! After the user 
      // sees the explanation, try again to request the permission. 

     } else { 

      // No explanation needed, we can request the permission. 

      ActivityCompat.requestPermissions(DetailActivity.this, 
        new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 
        MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE); 

      // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an 
      // app-defined int constant. The callback method gets the 
      // result of the request. 
      } 
    } else { 
     startActivityForResult(new Intent(Intent.ACTION_PICK, 
       android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI), GET_FROM_GALLERY); 
    } 
} 

Override onRquestPermissionResult

/* 
    find out whether the permission was granted 
*/ 
@Override 
public void onRequestPermissionsResult(int requestCode, 
             String permissions[], int[] grantResults) { 
    switch (requestCode) { 
     case MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE: { 
      // If request is cancelled, the result arrays are empty. 
      if (grantResults.length > 0 
        && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 

       // start Activity if granted 
       startActivityForResult(new Intent(Intent.ACTION_PICK, 
         MediaStore.Images.Media.INTERNAL_CONTENT_URI), GET_FROM_GALLERY); 

      } else { 

       // permission denied, boo! Disable the 
       // functionality that depends on this permission. 
      } 
      return; 
     } 

     // other 'case' lines to check for other 
     // permissions this app might request 
    } 
} 

courir après l'autorisation accordée:

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

    //Detects request codes 
    if(requestCode==GET_FROM_GALLERY && resultCode == Activity.RESULT_OK) { 
     Uri selectedImage = data.getData(); 
     Bitmap bitmap = null; 
     try { 
      bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), selectedImage); 

      ContextWrapper cw = new ContextWrapper(getApplicationContext()); 
      // path to /data/data/yourapp/app_data/imageDir 
      File directory = cw.getDir("imageDir", Context.MODE_PRIVATE); 
      // Create imageDir 
      File mypath=new File(directory,"profile.jpg"); 

      FileOutputStream fos = null; 
      try { 
       fos = new FileOutputStream(mypath); 
       // Use the compress method on the BitMap object to write image to the OutputStream 
       bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } finally { 
       try { 
        fos.close(); 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 
      } 
      directory.getAbsolutePath(); 
     } catch (FileNotFoundException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 
} 

Dans mon manifeste J'ai aussi des autorisations:

<application 
    android:allowBackup="true" 
    android:icon="@mipmap/ic_launcher" 
    android:label="@string/app_name" 
    android:supportsRtl="true" 
    android:theme="@style/AppTheme"> 
    <activity android:name=".activities.LoginActivity"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity 
     android:name=".activities.RegisterActivity" 
     android:screenOrientation="portrait" /> 
    <activity 
     android:name=".activities.CategoryActivity" 
     android:screenOrientation="portrait" /> 
    <activity android:name=".activities.SuggestionActivity" /> 
    <activity 
     android:name=".activities.DetailActivity" 
     android:theme="@style/AppTheme" /> 

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 
</application> 

Néanmoins je reçois cette erreur en cliquant sur le bouton (Device est API 24):

06-08 19:56:28.903 18770-18782/android.process.media E/DatabaseUtils: Writing exception to parcel 
                     java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/file from pid=20240, uid=10046 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission() 
                      at android.content.ContentProvider.enforceReadPermissionInner(ContentProvider.java:608) 
                      at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:483) 
                      at android.content.ContentProvider$Transport.query(ContentProvider.java:212) 
                      at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:112) 
                      at android.os.Binder.execTransact(Binder.java:565) 

Answer 1

startActivityForResult(new Intent(Intent.ACTION_PICK, 
      android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI), GET_FROM_GALLERY); 

Le code ci-dessus est exécuté indépendamment de l'autorisation accordée étant ou non. Vouliez-vous l'enrouler autour de else pour votre if?

public void onClickUpload(View view) { 

    // Here, thisActivity is the current activity 
    if (ContextCompat.checkSelfPermission(DetailActivity.this, 
      Manifest.permission.READ_EXTERNAL_STORAGE) 
      != PackageManager.PERMISSION_GRANTED) { 

     // Should we show an explanation? 
     if (ActivityCompat.shouldShowRequestPermissionRationale(DetailActivity.this, 
       Manifest.permission.READ_EXTERNAL_STORAGE)) { 

      // Show an explanation to the user *asynchronously* -- don't block 
      // this thread waiting for the user's response! After the user 
      // sees the explanation, try again to request the permission. 

     } else { 

      // No explanation needed, we can request the permission. 

      ActivityCompat.requestPermissions(DetailActivity.this, 
        new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 
        MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE); 

      // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an 
      // app-defined int constant. The callback method gets the 
      // result of the request. 
     } 
    } else { 
     startActivityForResult(new Intent(Intent.ACTION_PICK, 
      android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI), GET_FROM_GALLERY); 
    } 
} 

Et je suppose que vous avez remplacée

public void onRequestPermissionsResult(int requestCode, 
              @NonNull String permissions[], 
              @NonNull int[] grantResults) 

pour écouter l'autorisation est accordée ou non.