小编Muh*_*glu的帖子

我开发了一个android应用程序.我使用firebase进行通知.我阅读了firebase文档然后分别制作了它们.我可以使用InstanceID令牌向一台设备发送推送通知.但我无法向所有设备发送推送通知.请帮我.

MyFirebaseMessagingService.java

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    private static final String TAG = "MyFirebaseMsgService";

    /**
     * Called when message is received.
     *
     * @param remoteMessage Object representing the message received from Firebase Cloud Messaging.
     */
    // [START receive_message]
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        // TODO(developer): Handle FCM messages here.
        // If the application is in the foreground handle both data and notification messages here.
        // Also if you intend on generating your own notifications as a result of …

几天以来我一直在处理一个问题。正常情况下，Chrome Inspect 属性工作正常，但突然崩溃了。我不明白为什么会发生。我在页面中看到设备。当我单击检查时，它会打开空白页面。我卸载并重新安装了 chrome，但它不起作用。如果您对这种情况有任何了解，可以帮我吗？

我想将状态栏图标颜色从白色更改为黑色。我尝试下面的代码，但我做不到。请问你能帮帮我吗？

活动代码：

public static void setLightStatusBar(View view,Activity activity){
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

        int flags = view.getSystemUiVisibility();
        flags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
        view.setSystemUiVisibility(flags);
        activity.getWindow().setStatusBarColor(Color.WHITE);
    }
}

style.xml 代码：

<item name="android:windowLightStatusBar">true</item>

我正在开发一个Android应用程序.此应用程序从库中获取所有缩略图图像.我想按日期排序这些缩略图,但我不能这样做.

请帮我.

获取所有图像

// Set up an array of the Thumbnail Image ID column we want
String[] columns = {MediaStore.Images.Media._ID};

String orderBy = MediaStore.Images.Thumbnails._ID + " DESC LIMIT 10";

// Create the cursor pointing to the SDCard

cursor = getActivity().managedQuery(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,
        columns, // Which columns to return
        null,       // Return all rows
        null,
        orderBy);

// Get the column index of the Thumbnails Image ID
columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);

myGalleryImages = (GridView) view.findViewById(R.id.my_gallery);
myGalleryImages.setAdapter(new ImageAdapter(getActivity()));

设置图像

    // Move cursor to current position
    cursor.moveToPosition(position); …