小编Ror*_*ory的帖子

我知道我可以从src/test/resources加载一个文件:

getClass().getResource("somefile").getFile()

但是我如何获得src/test/resources 目录的完整路径,即我不想加载文件,我只是想知道目录的路径？

我有一个接收网络连接事件的BroadcastReceiver实现.它在AndroidManifest.xml中声明,并在网络事件发生时由Android自动调用.

广播接收器:

public class ConnectivityChangeReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.v(TAG, "action: " + intent.getAction());
        Log.v(TAG, "component: " + intent.getComponent());
    }
}

AndroidManifest.xml中:

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

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        ...
        <receiver
            android:name=".ConnectivityChangeReceiver"
            android:enabled="true">
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
            </intent-filter>
        </receiver>
    </application>

</manifest>

我想在这里为我的应用程序使用Google的MVP示例架构:

https://github.com/googlesamples/android-architecture/tree/todo-mvp/

使用上面的架构,只是想知道:

1. 我的BroadcastReceiver应放在哪里？

2. 如果我的BroadcastReceiver需要写入数据库,那么最好的方法是什么？

3. 如果我的BroadcastReceiver需要更新UI,那么最好的方法是什么？

在JavaScript中,我们可以:

function isBiggerThan10(element, index, array) {
  return element > 10;
}
[2, 5, 8, 1, 4].some(isBiggerThan10);  // false
[12, 5, 8, 1, 4].some(isBiggerThan10); // true

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some

是否有PHP等效的some()函数？

我有以下BroadcastRecevier:

public class WiFiConnectionEventsReceiver extends BroadcastReceiver {

    private static final String TAG = WiFiConnectionEventsReceiver.class.getSimpleName();

    @Override
    public void onReceive(Context context, @NonNull Intent intent) {
        Log.v(TAG, "action: " + intent.getAction());
        Log.v(TAG, "component: " + intent.getComponent());
        Bundle extras = intent.getExtras();
        if (extras != null) {
            for (String key : extras.keySet()) {
                Log.v(TAG, "key [" + key + "]: " +
                        extras.get(key));
            }
        } else {
            Log.v(TAG, "no extras");
        }

        ConnectivityManager conMan = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = conMan.getActiveNetworkInfo();
        if (netInfo != null && …

我正在尝试使用CloudWatch API从EC2实例获取CPU统计信息:

http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/cloudwatch/AmazonCloudWatchClient.html

我有以下代码但它返回一个空结果,即使实例Id和AWS访问和密钥是正确的.

我可以在CloudWatch UI上看到该实例的CPU util,但似乎无法在下面获得它？

我正在使用AWS SDK的1.9.0版.

任何帮助非常感谢.

import java.util.Date;

import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.cloudwatch.AmazonCloudWatchClient;
import com.amazonaws.services.cloudwatch.model.Datapoint;
import com.amazonaws.services.cloudwatch.model.Dimension;
import com.amazonaws.services.cloudwatch.model.GetMetricStatisticsRequest;
import com.amazonaws.services.cloudwatch.model.GetMetricStatisticsResult;

public class AmazonCloudWatchFetchCpuUtilTest {

    public static void main(String[] args) {
        final String awsAccessKey = ...;
        final String awsSecretKey = ...;
        final String instanceId = ...;

        final AmazonCloudWatchClient client = client(awsAccessKey, awsSecretKey);
        final GetMetricStatisticsRequest request = request(instanceId); 
        final GetMetricStatisticsResult result = result(client, request);
        toStdOut(result, instanceId);   
    }

    private static AmazonCloudWatchClient client(final String awsAccessKey, final String awsSecretKey) {
        return …

我正在使用Android Studio版本1.4.1.

我的layout-large目录中有以下2个布局xmls:

活动的main.xml中

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:fitsSystemWindows="true"
    tools:context=".MainActivity">

    <android.support.design.widget.AppBarLayout android:layout_height="wrap_content"
        android:layout_width="match_parent" android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar android:id="@+id/toolbar"
            android:layout_width="match_parent" android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_main" />

    <android.support.design.widget.FloatingActionButton android:id="@+id/fab"
        android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:layout_gravity="bottom|end" android:layout_margin="@dimen/fab_margin"
        android:src="@android:drawable/ic_dialog_email" />

</android.support.design.widget.CoordinatorLayout>

content_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:orientation="horizontal"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:showIn="@layout/activity_main" tools:context=".MainActivity">

    <fragment
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="2"
        class="com.hfad.workout.WorkoutListFragment"
        android:id="@+id/list_frag"/>

    <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="3" />
</LinearLayout>

这是我的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.hfad.workout" >

    <application …