Question

我在ActionBar中有一个位置按钮。点击它会加载给定的函数cityLocation()。

代码执行如下

第一次按下时，会询问位置许可
如果接受它会运行showCity（），否则会弹出Toast
如果在拒绝后再次点击，则执行shouldShowRequestPermissionRationale()部分（PS。我没有点击不再显示）

无论如何，这只是我第二次点击按钮，而不是再次向我询问位置许可（再次显示不再显示），它会执行shouldShowRequestPermissionRationale()部分。

我希望代码通过不再询问复选框询问位置权限，如果权限是第一次被拒绝，然后如果我再次拒绝它（使用复选框）然后单击操作栏项，则它应该运行MaterialDialog.Builder代码。

这是我现在拥有的代码：

private void cityLocation() {
    if (Build.VERSION.SDK_INT >= 23) {
        if (ActivityCompat.checkSelfPermission(WeatherActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(WeatherActivity.this,
                    Manifest.permission.ACCESS_COARSE_LOCATION)) {
                MaterialDialog dialog;
                MaterialDialog.Builder builder = new MaterialDialog.Builder(this);
                builder.title("Permission needed")
                        .content("This Action Requires the Location Setting to be enabled. Go to Settings and check the Location Permission inside the Permissions View")
                        .positiveText("SETTINGS")
                        .negativeText("CANCEL")
                        .onPositive(new MaterialDialog.SingleButtonCallback() {
                            @Override
                            public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
                                final Intent i = new Intent();
                                i.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                                i.addCategory(Intent.CATEGORY_DEFAULT);
                                i.setData(Uri.parse("package:" + getApplicationContext().getPackageName()));
                                i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                i.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
                                i.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
                                startActivity(i);
                            }
                        })
                        .onNegative(new MaterialDialog.SingleButtonCallback() {
                            @Override
                            public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
                                dialog.dismiss();
                            }
                        });
                dialog = builder.build();
                dialog.show();
            }
            else
                requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
                        READ_COARSE_LOCATION);
        } else {
            showCity();
        }
    }
    else {
        showCity();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode,
                                       @NonNull String[] permissions,
                                       @NonNull int[] grantResults) {
    if (requestCode == READ_COARSE_LOCATION
            && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        showCity();
    }
    else {
        Toast.makeText(getApplicationContext() , "Denied Location Permission" , Toast.LENGTH_SHORT).show();
    }
}

等待解决方案。

Answer 1

这里是Full runtime permisssion check code：

 private void cityLocation() {
    if (Build.VERSION.SDK_INT >= 23) {
        if (!checkIfAlreadyhavePermission()) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, READ_COARSE_LOCATION);
        } else {
            showCity();
        }
    } else {
        showCity();
    }
}

private boolean checkIfAlreadyhavePermission() {
    int result = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION);
    return result == PackageManager.PERMISSION_GRANTED;
}

public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case READ_COARSE_LOCATION: {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                showCity();

            } else {
                permission_denied();
            }
            break;
        }
        // other 'case' lines to check for other
        // permissions this app might request
    }
}

public void permission_denied() {
    // permission was not granted
    //permission is denied (this is the first time, when "never ask again" is not checked) so ask again explaining the usage of permission
    // shouldShowRequestPermissionRationale will return true
    //show the dialog or snackbar saying its necessary and try again otherwise proceed with setup.
    if (ActivityCompat.shouldShowRequestPermissionRationale(WeatherActivity.this,
            Manifest.permission.ACCESS_COARSE_LOCATION)) {
        showDialogOK("Permission is required for register",
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        switch (which) {
                            case DialogInterface.BUTTON_POSITIVE:
                                showCity();
                                break;
                            case DialogInterface.BUTTON_NEGATIVE:
                                // proceed with logic by disabling the related features or quit the app.
                                break;
                        }
                    }
                });
    } //permission is denied (and never ask again is  checked)
    //shouldShowRequestPermissionRationale will return false
    else {
        Toast.makeText(getApplicationContext(), "Go to settings and enable External storage permissions", Toast.LENGTH_LONG).show();
        showMaterialDialog();
    }
}

public void showMaterialDialog() {
    MaterialDialog dialog;
    MaterialDialog.Builder builder = new MaterialDialog.Builder(this);
    builder.title("Permission needed")
            .content("This Action Requires the Location Setting to be enabled. Go to Settings and check the Location Permission inside the Permissions View")
            .positiveText("SETTINGS")
            .negativeText("CANCEL")
            .onPositive(new MaterialDialog.SingleButtonCallback() {
                @Override
                public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
                    final Intent i = new Intent();
                    i.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                    i.addCategory(Intent.CATEGORY_DEFAULT);
                    i.setData(Uri.parse("package:" + getApplicationContext().getPackageName()));
                    i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    i.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
                    i.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
                    startActivity(i);
                }
            })
            .onNegative(new MaterialDialog.SingleButtonCallback() {
                @Override
                public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
                    dialog.dismiss();
                }
            });
    dialog = builder.build();
    dialog.show();

}

private void showDialogOK(String message, DialogInterface.OnClickListener okListener) {
    new AlertDialog.Builder(getActivity())
            .setMessage(message)
            .setPositiveButton("OK", okListener)
            .setNegativeButton("Cancel", okListener)
            .create()
            .show();
}

如果用户拒绝权限，它将显示一个对话框...
如果用户也检查再也不询问它会显示材料对话框..
如果用户授予权限，它将执行所需的功能..

Answer 2

如果您在权限对话框中选中了复选框neverAskAgain，那么

ActivityCompat.shouldShowRequestPermissionRationale()

方法将返回false。因此，如果将其保留在if块中，那么再次显示材质对话框的逻辑将无效。

如果你必须再次显示它，请在else块中执行。

位置权限对话框未在活动中正确显示

2 个答案: