onRequestPermissionsResult在fragment android中没有被调用

Question

我通过在片段中使用以下代码来获取用户的运行时权限。

if (ContextCompat.checkSelfPermission(getActivity(),
                                    Manifest.permission.READ_EXTERNAL_STORAGE)
                                    != PackageManager.PERMISSION_GRANTED) {


                                ActivityCompat.requestPermissions(mActivity,
                                        new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
                                        STORAGE_PERMISSION_CODE);


                            }

并压倒一切

@Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        switch (requestCode) {
            case 21: {

                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    // permission was granted, yay! Do the
                    // contacts-related task you need to do.




                } else {

                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.
                    Toast.makeText(getActivity(), "Permission denied", Toast.LENGTH_SHORT).show();
                }
                return;
            }

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

但未调用重写方法

请给我提示，我必须在片段中覆盖

Answer 1

因为请记住，您必须在 ACTIVITY 中而不是在片段中执行此操作。你可以在片段中解决这个棘手的问题，但这是坏方法

这是在活动中。我检查权限并保存

private static final int REQUEST_CODE_GET_ACCOUNTS = 101;
    private static final int REQUEST_AUDIO_PERMISSION = 102;

 @TargetApi(23)
public void checkAudioPermission() {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
        playerFragment.setupVisualizerFxAndUI();
        return;
    }
    if (this.checkSelfPermission(Manifest.permission.RECORD_AUDIO) != PackageManager
            .PERMISSION_GRANTED) {
        requestPermissions(new String[]{Manifest.permission.RECORD_AUDIO},
                REQUEST_AUDIO_PERMISSION);
    } else {
        playerFragment.setupVisualizerFxAndUI();
    }
}

@TargetApi(23)
public void checkGmailPermission() {
    if (isDeviceOnline()) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
            showGmailRecFragment(true);
            return;
        }
        if (this.checkSelfPermission(Manifest.permission.GET_ACCOUNTS) != PackageManager
                .PERMISSION_GRANTED) {
            requestPermissions(new String[]{Manifest.permission.GET_ACCOUNTS},
                    REQUEST_CODE_GET_ACCOUNTS);
            return;
        } else {
            showGmailRecFragment(true);
        }
    } else {
        Utils.showToast(this, getString(R.string.no_internet));
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[]
        grantResults) {
    switch (requestCode) {
        case REQUEST_CODE_GET_ACCOUNTS:
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                showGmailRecFragment(true);
            } else {
                Utils.showToast(this, getString(R.string.accounts_permision_denied));
            }
            break;
        case REQUEST_AUDIO_PERMISSION:
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                playerFragment.setupVisualizerFxAndUI();
            } else {
                Utils.showToast(this, getString(R.string.audio_permission_denied));
            }
        default:
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
            break;
    }
}

当我想再次检查权限或用户拒绝它时，这是片段。这也保存了权限

private void setupViewVisualizer() {
    if (!isLiveTv && !homeVideo.isVideoType()) {
        ((PlayerActivity) activity).checkAudioPermission();
    } else {
        return;
    }
}