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

Question

我试图实现从存储中写入和读取的请求权限。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 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(),
            new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE},
            StorageKeys.STORAGE_PERMISSION_CODE));
    reqAlertDialog.setNegativeButton(R.string.cancel,
        (dialog, which) -> dialog.dismiss());

    reqAlertDialog.create().show();
  }

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

Answer 1

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()
        return
    }
    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
}
}

Answer 2

onRequestPermissionsResult()方法在androidx.fragment.app.Fragment.

所以你改用registerForActivityResult()method onRequestPermissionsResult()。

你可以参考这个网址。

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。
如何在新的 ActivityResult API (1.3.0-alpha05) 中获取权限请求？

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
       )
    )

Answer 3

替代方案 registerForActivityResult

使用示例：

 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()
        }
    }
}