Question

我想放一张我的SD卡中的图片，但它没有出现，我认为滑行库或许可证有问题，我在那里堆了2天请帮助我。

public class MainActivity extends AppCompatActivity {

    public final static String PATH_SD_CARD = "/Images/Mj.jpg";
    private static final int MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE = 1;



    @TargetApi(Build.VERSION_CODES.M)
    @RequiresApi(api = Build.VERSION_CODES.M)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE)
                != getPackageManager().PERMISSION_GRANTED) {

            // Should we show an explanation?
            if (shouldShowRequestPermissionRationale(
                    Manifest.permission.READ_EXTERNAL_STORAGE)) {
                // Explain to the user why we need to read the contacts
            }

            requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
                    MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);

            // MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE is an
            // app-defined int constant that should be quite unique

            return;
        }

        ImageView img = findViewById(R.id.imageView);

        Glide.with(this)
                .load(Environment.getExternalStorageDirectory().getAbsolutePath()+PATH_SD_CARD)
                .into(img);
    }
}

Answer 1

你有没有在android清单文件中添加权限，如下面的代码..

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

Answer 2

调用2018-04-25 12:44:00,018 ERROR [quartz.core.JobRunShell] [DefaultScheduler_Worker-6] Job DEFAULT.org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean#785aa4ce threw an unhandled Exception: org.springframework.scheduling.quartz.JobMethodInvocationFailedException: Invocation of method 'run' on target class [class org.alfresco.module.org_alfresco_module_wcmquickstart.jobs.DynamicCollectionProcessor] failed; nested exception is org.alfresco.repo.search.impl.lucene.LuceneQueryParserException: 03253095 Request failed 404 /solr4/alfresco/alfresco?wt=json&fl=DBID%2Cscore&rows=1000&df=TEXT&start=0&locale=en_US&alternativeDic=DEFAULT_DICTIONARY&fq=%7B%21afts%7DAUTHORITY_FILTER_FROM_JSON&fq=%7B%21afts%7DTENANT_FILTER_FROM_JSON at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:321) at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:114) at org.quartz.core.JobRunShell.run(JobRunShell.java:216) at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:563) Caused by: org.alfresco.repo.search.impl.lucene.LuceneQueryParserException: 03253095 Request failed 404 /solr4/alfresco/alfresco?wt=json&fl=DBID%2Cscore&rows=1000&df=TEXT&start=0&locale=en_US&alternativeDic=DEFAULT_DICTIONARY&fq=%7B%21afts%7DAUTHORITY_FILTER_FROM_JSON&fq=%7B%21afts%7DTENANT_FILTER_FROM_JSON at org.alfresco.repo.search.impl.solr.SolrQueryHTTPClient.postQuery(SolrQueryHTTPClient.java:1159) at org.alfresco.repo.search.impl.solr.SolrQueryHTTPClient.postSolrQuery(SolrQueryHTTPClient.java:1109) at org.alfresco.repo.search.impl.solr.SolrQueryHTTPClient.executeQuery(SolrQueryHTTPClient.java:576) at org.alfresco.repo.search.impl.solr.SolrQueryLanguage.executeQuery(SolrQueryLanguage.java:58) at org.alfresco.repo.search.impl.solr.SolrSearchService.query(SolrSearchService.java:355) at org.alfresco.repo.search.impl.solr.SolrSearchService.query(SolrSearchService.java:159) at org.alfresco.repo.search.SearcherComponent.query(SearcherComponent.java:73) at org.alfresco.repo.search.AbstractSearcherComponent.query(AbstractSearcherComponent.java:60) at sun.reflect.GeneratedMethodAccessor614.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.alfresco.repo.management.subsystems.SubsystemProxyFactory$1.invoke(SubsystemProxyFactory.java:79) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) at com.sun.proxy.$Proxy26.query(Unknown Source) at org.alfresco.repo.search.impl.SearchServiceSubSystemDelegator.query(SearchServiceSubSystemDelegator.java:98) at org.alfresco.module.org_alfresco_module_wcmquickstart.jobs.DynamicCollectionProcessor$1$1.execute(DynamicCollectionProcessor.java:253) at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:464) at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:333) at org.alfresco.module.org_alfresco_module_wcmquickstart.jobs.DynamicCollectionProcessor$1.doWork(DynamicCollectionProcessor.java:242) at org.alfresco.repo.security.authentication.AuthenticationUtil.runAs(AuthenticationUtil.java:555) at org.alfresco.module.org_alfresco_module_wcmquickstart.jobs.DynamicCollectionProcessor.runInternal(DynamicCollectionProcessor.java:237) at org.alfresco.module.org_alfresco_module_wcmquickstart.jobs.DynamicCollectionProcessor.run(DynamicCollectionProcessor.java:200) at sun.reflect.GeneratedMethodAccessor860.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:269) at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:312) ... 3 more并不保证SD卡方式的外部存储，但外部一词引用“应用程序外部”。在大多数情况下，此路径会为您提供：Environment.getExternalStorageDirectory()。

由于任何不是设备组成部分的“驱动器”的路径可以有不同的名称，因此无论设备如何，您都需要其他方式来查找它。 IMO，最有效和最安全的方法是使用一些标准查询/storage/emulated/0/。

快速解决方案可能是使用MediaStore女巫给你getExternalFilesDirs()你的应用程序帽子“其”目录。该阵列的第二个元素是SDCard上的路径。如果从那里开始两个“级别”（Files[]），您将获得对“根”SDCard目录的引用。

当然，正如已经提到的那样，请大量使用调试来了解它出错的地方。

Answer 3

测试此代码：

redux-saga

滑行不从SD卡加载图像

3 个答案: