Android Marshmallow 权限错误

Question

我正在为我的应用程序添加某些权限，例如允许访问相机，并且一切正常。但是当我最小化应用程序并禁用权限然后打开应用程序时，应用程序崩溃而不要求我重新启用权限(直到我关闭应用程序然后打开它)。我该如何修复此错误，以便应用程序不会崩溃并再次请求权限或安全重启以请求权限。

这是我的代码

在主要 Activity 中:

创建时:

 if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.CAMERA},
                    GlobalVariables.MY_PERMISSIONS_REQUEST_CAMERA);
        }


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

            case GlobalVariables.MY_PERMISSIONS_REQUEST_CAMERA:
            {
                if (grantResults.length <= 0
                        || grantResults[0] != PackageManager.PERMISSION_GRANTED) {
                    globalVariables.ShowOKAlert("Error","Please Accept All Requested Permissions or the app wont function properly",this,false);
                }
                return;
            }
        }
    }

Activity 实现 ActivityCompat.OnRequestPermissionsResultCallback

Answer 1

第一步:

 String[] permissions = new String[]{ 
    Manifest.permission.INTERNET,
    Manifest.permission.READ_PHONE_STATE,
    Manifest.permission.READ_EXTERNAL_STORAGE,
    Manifest.permission.WRITE_EXTERNAL_STORAGE,
 };

第 2 步:-

private boolean checkPermissions() {
    int result;
    List<String> listPermissionsNeeded = new ArrayList<>();
    for (String p : permissions) {
        result = ContextCompat.checkSelfPermission(this, p);
        if (result != PackageManager.PERMISSION_GRANTED) {
             listPermissionsNeeded.add(p);
        }
    }
    if (!listPermissionsNeeded.isEmpty()) {
        ActivityCompat.requestPermissions(this, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), 100);
        return false;
    }
    return true;
}

第 3 步:

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    if (requestCode == 100) {
        if (grantResults.length > 0
            && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        // do something
        }
        return;
    }
}