Java 等待用户权限继续

我想让我的应用等待用户授予权限，然后再继续应用。我搜索了关于它的其他线程，发现常见的方法是使用

onRequestPermissionResult

。现在我完全不知道如何设置它：除了请求本身之外，我是否只将程序代码放入

onRequestPermissionResult

中，或者我需要如何设置它，这样用户就可以请求它，然后应用程序继续运行

这是我的代码：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

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

       ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 123);
   } else {
       progressBar.setVisibility(View.VISIBLE);
       GPSTracker gt = new GPSTracker(getActivity().getApplicationContext());
       Location location = gt.getLocation();

       if (location == null) {
           Toast.makeText(getActivity(), "No location found.",
                   Toast.LENGTH_LONG).show();
       } else {
           lat = location.getLatitude();
           lon = location.getLongitude();
       }
       new GetContacts().execute();
   }
} else {
  progressBar.setVisibility(View.VISIBLE);
  GPSTracker gt = new GPSTracker(getActivity().getApplicationContext());
  Location location = gt.getLocation();

  if (location == null) {
     Toast.makeText(getActivity(), "No location found.",
              Toast.LENGTH_LONG).show();
  } else {
      lat = location.getLatitude();
      lon = location.getLongitude();
  }
    new GetContacts().execute();
}

结果是：

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 123: {
            // If request is cancelled, the result arrays are empty
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                progressBar.setVisibility(View.VISIBLE);
                GPSTracker gt = new GPSTracker(getActivity().getApplicationContext());
                Location location = gt.getLocation();

                if (location == null) {
                    Toast.makeText(getActivity(), "No location found.",
                            Toast.LENGTH_LONG).show();
                } else {
                    lat = location.getLatitude();
                    lon = location.getLongitude();
                }
                new GetContacts().execute();

            } else {
                //Toast
            }
            return;
        }
    }
}

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 123: {
            // If request is cancelled, the result arrays are empty
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                //GPS method
            } else {
                // Toast for user
            }
            return;
        }
    }
}

---

就像评论中提到的Martin Zeitler一样，您必须准备棉花糖上面和下面的API，例如：

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

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

        ActivityCompat.requestPermissions(getActivity(), new String[] {Manifest.permission.ACCESS_FINE_LOCATION}, 123);
    } else {

        //GPS method
    }
} else {

    //GPS method
}

正如你在onRequestResult的问题中提到的：

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 123: {
            // If request is cancelled, the result arrays are empty
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                progressBar.setVisibility(View.VISIBLE);
                GPSTracker gt = new GPSTracker(getActivity().getApplicationContext());
                Location location = gt.getLocation();

                if (location == null) {
                    Toast.makeText(getActivity(), "No location found.",
                            Toast.LENGTH_LONG).show();
                } else {
                    lat = location.getLatitude();
                    lon = location.getLongitude();
                }
                new GetContacts().execute();

            } else {
                //Toast
            }
            return;
        }
    }
}

@Override
public void onRequestPermissionsResult(int requestCode,
                                       String permissions[], int[] grantResults) {
    switch (requestCode) {
        case 123: {
            // If request is cancelled, the result arrays are empty
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                //GPS method
            } else {
                // Toast for user
            }
            return;
        }
    }
}

---

重新构造该方法，以便

GPSTracker gt…

将驻留在它自己的方法中，该方法可以从其他两个位置调用；也可以考虑<代码> API 23 <代码>在运行时没有支持请求的权限。哦，好吧，它是如何用API 23解决的，那么如果你知道的话，权限被添加到清单中，当用户下载应用程序时，他/她将被要求应用程序安装应用程序的所有权限。所以在运行时没有权限。以上所有权限都必须在清单中声明。我想这样做对于较新版本来说是不可能的，所以有必要在运行时检查它们？不要提：）。快乐编码并将知识传递给他人：）我一定会的！：）