erforderlich android.permission Read_External_storage oder grantUrlPermissions Fehler

Question

Ich denke, meine Berechtigungen richtig auf AndroidManifest.xml.

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.ganedu.intent"> 

<uses-sdk 
    android:minSdkVersion="8" 
    android:targetSdkVersion="23" /> 


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

    <application 
     android:allowBackup="true" 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     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=".NextActivity" 
      android:label="This is next_activity"/> 
    </application> 

</manifest> 

Ich habe "android.permission.READ_EXTERNAL_STORAGE" und "android.permission.WRITE_EXTERNAL_STORAGE" direkt nach dem Manifest.

aber der Fehler ist weiterhin aufgetreten.

Verursacht durch: java.lang.SecurityException: Permission Denial: Lesen com.android.providers.media.MediaProvider uri Inhalt: // media/extern/images/media/40 von pid = 2473, uid = 10073 erfordert android.permission.READ_EXTERNAL_STORAGE oder grantUriPermission()

und das ist mein MainActivity.java

public class MainActivity extends AppCompatActivity { 

public static final int IMAGE_GALLERY_REQUEST = 20; 
Button btnStart; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    } 

public void gallery_open(View view) { 
    Intent galleryPickerIntent = new Intent(Intent.ACTION_PICK); 
    File pictureDirectory = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES); 
    String pictureDirectoryPath = pictureDirectory.getPath(); 
    Uri data = Uri.parse(pictureDirectoryPath); 
    galleryPickerIntent.setDataAndType(data,"image/*"); 
    startActivityForResult(galleryPickerIntent, IMAGE_GALLERY_REQUEST); 




} 
@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent){ 
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 
    if(resultCode == Activity.RESULT_OK){ 
     if(requestCode == IMAGE_GALLERY_REQUEST) { 
      onSelectedFromGalleryResult(imageReturnedIntent); 
     } 
    } 

} 

private void onSelectedFromGalleryResult(Intent data){ 
    Bitmap bm = null; 
    if(data != null){ 
     try{ 
      bm = MediaStore.Images.Media.getBitmap(getApplicationContext().getContentResolver(), data.getData()); 
     }catch(IOException e){ 
      e.printStackTrace(); 
     } 
     //ivImage.setImageBitmap(bm); 
     ImageView imgView = (ImageView)findViewById(R.id.ivImage); 
     imgView.setImageBitmap(bm); 


    } 
} 

Answer 1

James Ich nehme an, dass Sie mit diesem Fehler ab Android 6.0 konfrontiert sind. Sie müssen die Berechtigungen in diesen Versionen explizit behandeln. finden Sie die Android-Entwickler Link

https://developer.android.com/guide/topics/permissions/requesting.html

Answer 2

Sie müssen die Laufzeit Erlaubnis für Android Eibisch-Version zur Verfügung zu stellen

Sie diesen Code in onCreate hinzufügen können() oder jede Click-Ereignisse, versuchen Sie dies:

 if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1){ 
      // requestPermission(); 
      requestAppPermissions(new String[]{ 
        Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE }, 
        R.string.app_name, REQUEST_PERMISSIONS); 

      //this code will be executed on devices running ICS or later 
     } 

fügen ebenfalls diese Funktion zum Anfordern der Laufzeit Erlaubnis

public void requestAppPermissions(final String[] requestedPermissions, 
              final int stringId, final int requestCode) { 
      mErrorString.put(requestCode, stringId); 
      int permissionCheck = PackageManager.PERMISSION_GRANTED; 
      boolean shouldShowRequestPermissionRationale = false; 
      for (String permission : requestedPermissions) { 
       permissionCheck = permissionCheck + ContextCompat.checkSelfPermission(this, permission); 
       shouldShowRequestPermissionRationale = shouldShowRequestPermissionRationale || ActivityCompat.shouldShowRequestPermissionRationale(this, permission); 
      } 
      if (permissionCheck != PackageManager.PERMISSION_GRANTED) { 
       if (shouldShowRequestPermissionRationale) { 
        Snackbar.make(findViewById(android.R.id.content), stringId, 
          Snackbar.LENGTH_INDEFINITE).setAction("GRANT", 
          new View.OnClickListener() { 
           @Override 
           public void onClick(View v) { 
            ActivityCompat.requestPermissions(DashBoardActivity.this, requestedPermissions, requestCode); 
           } 
          }).show(); 
       } else { 
        ActivityCompat.requestPermissions(this, requestedPermissions, requestCode); 
       } 
      } else { 
       onPermissionsGranted(requestCode); 
      } 
     } 

Diese Funktion wird aufgerufen, wenn die Erlaubnis erteilt wird, und Sie können zur Überprüfung der angeforderten Erlaubnis Ergebnis

@Override 
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { 
     super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
     int permissionCheck = PackageManager.PERMISSION_GRANTED; 
     for (int permission : grantResults) { 
      permissionCheck = permissionCheck + permission; 
     } 
     if ((grantResults.length > 0) && permissionCheck == PackageManager.PERMISSION_GRANTED) { 
      onPermissionsGranted(requestCode); 
     } else { 
      Snackbar.make(findViewById(android.R.id.content), mErrorString.get(requestCode), 
        Snackbar.LENGTH_INDEFINITE).setAction("ENABLE", 
        new View.OnClickListener() { 
         @Override 
         public void onClick(View v) { 

         } 
        }).show(); 
     } 
    }