Android getResourceAsStream（）返回null

我已经搜索了一段时间，尝试了一些答案，但到目前为止没有任何效果。。 我想通过点击按钮以编程方式创建google日历事件。 为我的MainActivity获取了以下代码：

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button b = (Button) findViewById(R.id.button);
        b.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                CalManager c = new CalManager(MainActivity.this);
                try{c.addEvent();}
                catch(IOException e){
                    Log.d("mychecks", "failed");
                }
            }
        });
    }
}

CalManager类如下所示：

public class CalManager {
    Context ctx;
    static String dir;
    public CalManager(Context c){
        this.ctx = c;
        dir = ctx.getFilesDir().toString();
    }
    /** Application name. */
    private static final String APPLICATION_NAME =
            "test";

    /** Directory to store user credentials for this application. */
    private static final java.io.File DATA_STORE_DIR = new java.io.File(
           dir , ".credentials/test");

    /** Global instance of the {@link FileDataStoreFactory}. */
    private static FileDataStoreFactory DATA_STORE_FACTORY;

    /** Global instance of the JSON factory. */
    private static final JsonFactory JSON_FACTORY =
            JacksonFactory.getDefaultInstance();

    /** Global instance of the HTTP transport. */
    private static HttpTransport HTTP_TRANSPORT;

    /** Global instance of the scopes required by this quickstart.
     *
     * If modifying these scopes, delete your previously saved credentials
     * at ~/.credentials/calendar-java-quickstart
     */
    private static final List<String> SCOPES =
            Arrays.asList(CalendarScopes.CALENDAR_READONLY);

    static {
        try {
            HTTP_TRANSPORT = new com.google.api.client.http.javanet.NetHttpTransport();
            DATA_STORE_FACTORY = new FileDataStoreFactory(DATA_STORE_DIR);
        } catch (Throwable t) {
            t.printStackTrace();
        }
    }

    /**
     * Creates an authorized Credential object.
     * @return an authorized Credential object.
     * @throws IOException
     */
    public static Credential authorize() throws IOException {
        // Load client secrets.
        InputStream in =
                CalManager.class.getResourceAsStream("clientsecret.json");
        if(in==null){
            Log.d("mychecks", "fail");
        }
        GoogleClientSecrets clientSecrets =
                GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));

        // Build flow and trigger user authorization request.
        GoogleAuthorizationCodeFlow flow =
                new GoogleAuthorizationCodeFlow.Builder(
                        HTTP_TRANSPORT, JSON_FACTORY, clientSecrets, SCOPES)
                        .setDataStoreFactory(DATA_STORE_FACTORY)
                        .setAccessType("offline")
                        .build();
        Credential credential = new AuthorizationCodeInstalledApp(
                flow, new LocalServerReceiver()).authorize("user");
        System.out.println(
                "Credentials saved to " + DATA_STORE_DIR.getAbsolutePath());
        return credential;
    }

    /**
     * Build and return an authorized Calendar client service.
     * @return an authorized Calendar client service
     * @throws IOException
     */
    public static com.google.api.services.calendar.Calendar
    getCalendarService() throws IOException {
        Credential credential = authorize();
        return new com.google.api.services.calendar.Calendar.Builder(
                HTTP_TRANSPORT, JSON_FACTORY, credential)
                .setApplicationName(APPLICATION_NAME)
                .build();
    }
    public void addEvent() throws  IOException{
        com.google.api.services.calendar.Calendar service =
                getCalendarService();
        Event event = new Event()
                .setSummary("TestCalendarEvent")
                .setLocation("800 Howard St., San Francisco, CA 94103")
                .setDescription("First Test");

        DateTime startDateTime = new DateTime("2017-11-07T22:00:00Z");
        EventDateTime start = new EventDateTime()
                .setDateTime(startDateTime);
        event.setStart(start);

        DateTime endDateTime = new DateTime("2017-11-07T23:00:00Z");
        EventDateTime end = new EventDateTime()
                .setDateTime(endDateTime);
        event.setEnd(end);


        EventReminder[] reminderOverrides = new EventReminder[] {
                new EventReminder().setMethod("popup").setMinutes(10),
        };
        Event.Reminders reminders = new Event.Reminders()
                .setUseDefault(false)
                .setOverrides(Arrays.asList(reminderOverrides));
        event.setReminders(reminders);

        String calendarId = "bagcf5aip1o2v7ek6inb5693m8@group.calendar.google.com";
        event = service.events().insert(calendarId, event).execute();
    }
}

此时，应用程序在到达目标位置时崩溃

GoogleClientSecrets clientSecrets =
                GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(in));

-由于

CalManager.class.getResourceAsStream("clientsecret.json");

-返回null的语句。总是

clientsecret.json-file位于以下位置：

关于如何解决这个问题有什么想法吗

这个代码还有其他明显的问题吗

谢谢你的帮助

编辑： getResourceAsStream（）-问题已解决

下一个问题是

private static final java.io.File DATA_STORE_DIR = new java.io.File(
       dir , ".credentials/test");

引发错误：java.io.IOException:无法创建目录：/。凭据/测试

---

有什么想法吗？

把你的

json

文件放在资产文件夹中

并获得如下输入流：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.user.test">
<uses-permission android:name="android.permission.WRITE_CALENDAR"/>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

InputStream is = context.getAssets().open("clientsecret.json");

---

将您的

json

文件放在资产文件夹中

并获得如下输入流：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.user.test">
<uses-permission android:name="android.permission.WRITE_CALENDAR"/>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

InputStream is = context.getAssets().open("clientsecret.json");

---

添加了另一个问题的编辑。对此有什么想法吗？：/谢谢你的帮助！添加了另一个问题的编辑。对此有什么想法吗？：/谢谢你的帮助！