Android - onRequestPermissionsResult() 已弃用有没有其他选择？

如何解决Android - onRequestPermissionsResult() 已弃用有没有其他选择？

我尝试实现写入和读取存储的请求权限。一切正常，但今天 Android 向我展示了 onRequestPermissionsResult(...) 方法已被弃用。 StackOverflow 中有很多关于这个主题的问题，但不幸的是，它们已经过时了。

我在一个片段中调用了下面的方法。

建议简单地调用：

requestPermissions(new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE},StorageKeys.STORAGE_PERMISSION_CODE)

而不是我的方法：

ActivityCompat.requestPermissions(getActivity(),new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE},StorageKeys.STORAGE_PERMISSION_CODE))

但它们都表明 onRequestPermissionsResult(...) 已被弃用。

这是我的 onRequestPermissionsResult(...) 方法：

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

    if (requestCode == StorageKeys.STORAGE_PERMISSION_CODE) {

      if (grantResults.length > 0
          && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

        exportBibTex.createBibFile();
        exportBibTex.writeBibFile(exportBibTex
            .getBibDataLibrary(libraryModel,bookDao,noteDao));

        Toast.makeText(getContext(),getString(R.string.exported_file_stored_in) + '\n'
                + File.separator + StorageKeys.DOWNLOAD_FOLDER + File.separator + fileName
                + StorageKeys.BIB_FILE_TYPE,Toast.LENGTH_LONG).show();

      } else {
        Toast.makeText(getContext(),R.string.storage_permission_denied,Toast.LENGTH_SHORT).show();
      }
    }
  }

这是一个简单的警报对话框，我在其中调用了 onRequestPermissionsResult(...)：

  private void showRequestPermissionDialog() {
    AlertDialog.Builder reqAlertDialog = new AlertDialog.Builder(getContext());
    reqAlertDialog.setTitle(R.string.storage_permission_needed);
    reqAlertDialog.setMessage(R.string.storage_permission_alert_msg);

    reqAlertDialog.setPositiveButton(R.string.ok,(dialog,which) -> ActivityCompat.requestPermissions(getActivity(),StorageKeys.STORAGE_PERMISSION_CODE));
    reqAlertDialog.setNegativeButton(R.string.cancel,which) -> dialog.dismiss());

    reqAlertDialog.create().show();
  }

我可以使用 onRequestPermissionsResult(...) 的替代方法吗？

解决方法

onRequestPermissionsResult() 方法在 androidx.fragment.app.Fragment 中已弃用。

因此您使用 registerForActivityResult() 方法代替 onRequestPermissionsResult()。

你可以参考这个URL。

以下是 kotlin 代码。但你可以参考它。

val permReqLuncher = registerForActivityResult(ActivityResultContracts.RequestPermission()){
  if (it) {
     // Good pass
  } else {
     // Failed pass
  }
}

我从以下 URL 添加了 java 代码。
How to get a permission request in new ActivityResult API (1.3.0-alpha05)?

private ActivityResultLauncher<String> mPermissionResult = registerForActivityResult(
        new ActivityResultContracts.RequestPermission(),new ActivityResultCallback<Boolean>() {
            @Override
            public void onActivityResult(Boolean result) {
                if(result) {
                    Log.e(TAG,"onActivityResult: PERMISSION GRANTED");
                } else {
                    Log.e(TAG,"onActivityResult: PERMISSION DENIED");
                }
            }
        });



        // Launch the permission window -- this is in onCreateView()
    floatingActionButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
         mPermissionResult.launch(Manifest.permission.ACCESS_BACKGROUND_LOCATION);

        }
    });

您可以请求多个权限。

    val requestMultiplePermissions = registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { permissions ->
        permissions.entries.forEach {
            Log.e("DEBUG","${it.key} = ${it.value}")
        }
    }

    requestMultiplePermissions.launch(
        arrayOf(
            Manifest.permission.READ_CONTACTS,Manifest.permission.ACCESS_FINE_LOCATION
       )
    )

这对我有用 - (kotlin):

private fun checkPermissions() {
    if (mContext?.let {
        ContextCompat.checkSelfPermission(
            it,READ_EXTERNAL_STORAGE
        )
    } != PackageManager.PERMISSION_GRANTED) {
    Log.d(TAG,"Request Permissions")
    requestMultiplePermissions.launch(
        arrayOf(READ_EXTERNAL_STORAGE,WRITE_EXTERNAL_STORAGE))
 } else {
        Log.d(TAG,"Permission Already Granted")
    }
}

private val requestMultiplePermissions =
    registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { permissions ->
        permissions.entries.forEach {
            Log.d(TAG,"${it.key} = ${it.value}")
        }
        if (permissions[READ_EXTERNAL_STORAGE] == true && permissions[WRITE_EXTERNAL_STORAGE] == true) {
            Log.d(TAG,"Permission granted")
        } else {
            Log.d(TAG,"Permission not granted")
        }
    }

Kotlin

中的一种简单方法

import android.Manifest
import android.content.Context
import android.content.pm.PackageManager
import android.os.Build
import androidx.activity.result.contract.ActivityResultContracts
import androidx.core.app.ActivityCompat
import androidx.fragment.app.Fragment

class MyFragment : Fragment() {

companion object {
    val TAG: String = MyFragment::class.java.simpleName
    var PERMISSIONS = arrayOf(
        Manifest.permission.CAMERA,Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE
    )
}

private val permReqLauncher =
    registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { permissions ->
        val granted = permissions.entries.all {
            it.value == true
        }
        if (granted) {
            displayCameraFragment()
        }
    }

private fun takePhoto() {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
        displayCameraFragment()
    }
    activity?.let {
        if (hasPermissions(activity as Context,PERMISSIONS)) {
            displayCameraFragment()
        } else {
            permReqLauncher.launch(
                PERMISSIONS
            )
        }
    }
}

// util method
private fun hasPermissions(context: Context,permissions: Array<String>): Boolean = permissions.all {
    ActivityCompat.checkSelfPermission(context,it) == PackageManager.PERMISSION_GRANTED
}

private fun displayCameraFragment() {
    // open camera fragment
}
}

替代 registerForActivityResult

示例使用：

 private fun permissionSetup() {
    val permission = ContextCompat.checkSelfPermission(
        requireContext(),Manifest.permission.READ_CONTACTS)

    if (permission != PackageManager.PERMISSION_GRANTED) {
        permissionsResultCallback.launch(Manifest.permission.READ_CONTACTS)
    } else {
        println("Permission isGranted")
    }
}

private val permissionsResultCallback = registerForActivityResult(
    ActivityResultContracts.RequestPermission()){
    when (it) {
        true -> { println("Permission has been granted by user") }
        false -> {
            Toast.makeText(requireContext(),"Permission denied",Toast.LENGTH_SHORT).show()
            dialog.dismiss()
        }
    }
}

大多数答案都针对 OP 要求。但是我发现缺少的东西很少，所以我想提供一个完整的例子（在 Koltin 中）

class ProfileFragment : Fragment(){

private lateinit var permissionRequest : ActivityResultLauncher<Array<String>>

companion object {
      
        val LOCATION_PERMISSIONS = arrayOf(
            Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.ACCESS_COARSE_LOCATION
        )
    }

private fun getGpsLocation() {
        if(activity != null){
            permissionRequest.launch(LOCATION_PERMISSIONS)
        }

    }

override fun onViewCreated(view: View,savedInstanceState: Bundle?) {
        super.onViewCreated(view,savedInstanceState)

        binding.locBtn.setOnClickListener { getGpsLocation() }
       
    }
    
    override fun onCreateView(inflater: LayoutInflater,container: ViewGroup?,savedInstanceState: Bundle?): View {

        binding = DataBindingUtil.inflate(inflater,R.layout.fragment_profile,container,false)
        registerPermissionRequest()
        return binding.root
    }

 private fun registerPermissionRequest(){
        var permissionCount = 0
        permissionRequest = registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { permissions ->
            permissions.entries.forEach {
                if(it.value){
                    permissionCount++
                }

            }

            if(permissionCount == 2){
                getMyLocation()
            }
        }
    }
}

缺少的东西是

A)片段在创建之前必须调用 registerForActivityResult()（即初始化、onAttach() 或 onCreate()）。否则它将无法工作，应用程序会崩溃。 错误

java.lang.IllegalStateException: Fragment ProfileFragment{bf12414} (210ad5a1-3286-4586-a48f-deac1d8e3eef id=0x7f09008b) is attempting to registerForActivityResult after being created. Fragments must call registerForActivityResult() before they are created (i.e. initialization,onAttach(),or onCreate()).

B) 建议在确实需要时请求许可。在我的示例中，当用户点击 ID 为 locBtn 的按钮时，会显示权限对话框，而不是在创建活动/片段时显示。

您可以使用一些外部库进行权限处理以减少一些样板代码。我使用Dexter library。如果您使用的是 RxJava2，Rx Permissions 也是不错的选择。

Android - onRequestPermissionsResult() 已弃用有没有其他选择？

如何解决Android - onRequestPermissionsResult() 已弃用有没有其他选择？

解决方法

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