我正在 Marshmallow 6.0 上测试我的应用程序，它正在为 android.permission.READ_EXTERNAL_STORAGE 强制关闭，即使它已经在 list 中定义了。我在某处读到，如果我在运行时请求许可，那么它不会强制关闭您的应用程序。我读过this android document另外，它用于请求运行时权限。

所以，我开始知道我们可以请求像下面这样的权限，在 android 文档中有提到。

// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(thisActivity,
                Manifest.permission.READ_CONTACTS)
        != PackageManager.PERMISSION_GRANTED) {

    // Should we show an explanation?
    if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
            Manifest.permission.READ_CONTACTS)) {

        // Show an expanation to the user *asynchronously* -- don't block
        // this thread waiting for the user's response! After the user
        // sees the explanation, try again to request the permission.

    } else {

        // No explanation needed, we can request the permission.

        ActivityCompat.requestPermissions(thisActivity,
                new String[]{Manifest.permission.READ_CONTACTS},
                MY_PERMISSIONS_REQUEST_READ_CONTACTS);

        // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
        // app-defined int constant. The callback method gets the
        // result of the request.
    }
}

上面的代码有一个回调方法onRequestPermissionsResult获取结果。

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

     }
}

我的问题是在哪里准确地向用户请求权限？我们应该在应用程序启动时使用请求权限，还是应该在需要权限时使用？

最佳答案

这对我有用!!! 在您的应用程序的 Splash Activity 中执行以下操作，

1) 为请求代码声明一个int变量，

private static final int REQUEST_CODE_PERMISSION = 2;

2) 声明一个字符串数组，其中包含您需要的权限数，

 String[] mPermission = {Manifest.permission.READ_CONTACTS, Manifest.permission.READ_SMS,
 Manifest.permission.ACCESS_FINE_LOCATION,
 Manifest.permission.WRITE_EXTERNAL_STORAGE};

3) 接下来检查 onCreate 方法的运行时权限条件，

try {
            if (ActivityCompat.checkSelfPermission(this, mPermission[0])
                    != MockPackageManager.PERMISSION_GRANTED ||
                    ActivityCompat.checkSelfPermission(this, mPermission[1])
                            != MockPackageManager.PERMISSION_GRANTED ||
                    ActivityCompat.checkSelfPermission(this, mPermission[2])
                            != MockPackageManager.PERMISSION_GRANTED ||
                    ActivityCompat.checkSelfPermission(this, mPermission[3])
                            != MockPackageManager.PERMISSION_GRANTED) {

                ActivityCompat.requestPermissions(this,
                        mPermission, REQUEST_CODE_PERMISSION);

              // If any permission aboe not allowed by user, this condition will execute every tim, else your else part will work
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

4) 现在声明 onRequestPermissionsResult 方法来检查请求代码，

@Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        Log.e("Req Code", "" + requestCode);
        if (requestCode == REQUEST_CODE_PERMISSION) {
            if (grantResults.length == 4 &&
                    grantResults[0] == MockPackageManager.PERMISSION_GRANTED &&
                    grantResults[1] == MockPackageManager.PERMISSION_GRANTED &&
                    grantResults[2] == MockPackageManager.PERMISSION_GRANTED &&
                    grantResults[3] == MockPackageManager.PERMISSION_GRANTED) {

               // Success Stuff here

            }
        }

    }

关于java - 何时在运行时为 Android Marshmallow 6.0 请求权限？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34150083/