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

android java deprecated request permissions

2022-08-31 14:12:50

我试图实现从存储中写入和读取的请求权限。一切都很好，但今天Android向我展示了onRequestPermissionsResult（...）的方法已被弃用。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。

我在片段中调用了下面的方法。

有人建议简单地调用：

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();
      }
    }
  }

下面是一个简单的警报对话框，在其中我调用 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();
  }

对于 onRequestPermissionsResult（...），我可以使用吗？

答案 1

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

因此，您可以使用方法代替.registerForActivityResult()onRequestPermissionsResult()

您可以参考此网址。

以下是 Kotlin 代码，但您可以参考它：

val requestPermissionLauncher = registerForActivityResult(
    ActivityResultContracts.RequestPermission()
) { isGranted ->
    if (isGranted) {
        // PERMISSION GRANTED
    } else {
        // PERMISSION NOT GRANTED
    }
}

// Ex. Launching ACCESS_FINE_LOCATION permission.
private fun startLocationPermissionRequest() {
    requestPermissionLauncher(Manifest.permission.ACCESS_FINE_LOCATION)
}

我从下面的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> requestPermissionLauncher = registerForActivityResult(
    new ActivityResultContracts.RequestPermission(),
    new ActivityResultCallback<Boolean>() {
        @Override
        public void onActivityResult(Boolean result) {
            if (result) {
                // PERMISSION GRANTED
            } else {
                // PERMISSION NOT GRANTED
            }
        }
    }
);

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

您还可以请求多个权限：

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

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

答案 2

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
}
}

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

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