无法从Android Instant应用启动画廊 [英] Not able to launch Gallery from Android Instant app

问题描述

我创建了一个应用程序，该应用程序从模拟器的images文件夹中拾取图像，并在我的应用程序布局中显示选定的图像.当我将我的应用程序转换为即时应用程序时，从图像文件夹中拾取图像的相同代码将引发异常.我使用了运行时权限READ_EXTERNAL_STORAGE.

I created an app which picks up images from images folder in emulator and displays selected image in my layout of application. When I converted my app to instant app, the same code that picks up images from image folder throws exception. I used runtime permissions READ_EXTERNAL_STORAGE.

我的代码:

private static final int PICK_IMAGE_REQUEST = 234;
Intent intent = new Intent();
intent.setType("*/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, PICK_IMAGE_REQUEST);

引发异常:

java.lang.SecurityException: Not allowed to start activity Intent { 
          act=android.intent.action.GET_CONTENT typ=*/* }

运行时权限代码:

private static final int REQUEST_WRITE_STORAGE = 112;
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    public boolean checkPermission()
    {
        int currentAPIVersion = Build.VERSION.SDK_INT;
        if(currentAPIVersion>=android.os.Build.VERSION_CODES.M)
        {
            if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE)) {

                   Toast.makeText(MainActivity.this,"Permission Denied...",Toast.LENGTH_LONG).show();
                } else {
                    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_WRITE_STORAGE);
                    return  true;
                }
                return false;
            } else {
                return true;
            }
        } else {
            return true;
        }
    }

有人可以帮助我解决这个问题吗?

Can anyone help me in solving this issue?

推荐答案

即时应用无法访问常规Android应用可以访问的某些功能.例外:

Instant Apps are blocked from accessing some features that regular Android apps can access. The exception:

java.lang.SecurityException: Not allowed to start activity Intent...

意味着您已经找到了一种这样的功能.在这种情况下，它是 Intent.ACTION_GET_CONTENT ，目前不是允许的.随着时间的推移，可能会引入对诸如此类的附加功能的支持.

Means you have found one such feature. In this case it is Intent.ACTION_GET_CONTENT which is not currently allowed. Support for additional features such as this may be introduced over time.

此外，Instant Apps没有访问外部存储的权限，因此请求访问 READ_EXTERNAL_STORAGE 也不起作用或引发异常.有关支持的权限列表，请参见此处.通过Instant Apps.

In addition, Instant Apps do not have access to read or write from external storage so requesting access to READ_EXTERNAL_STORAGE will also not work or throw an exception. See here for a list of permissions that are supported by Instant Apps.

这篇关于无法从Android Instant应用启动画廊的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！