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java - 从另一个活动刷新 SwipeRefreshLayout

问题描述

活动“SubmitListActivity”包含一个 SwipeRefreshLayout，需要从“SettingsActivity”中刷新。

activity_submitlist.xml

<android.support.constraint.ConstraintLayout 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:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SubmitlistActivity">



<android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipeContainerSubmitList"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/submitList"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingBottom="0dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </android.support.v4.widget.SwipeRefreshLayout>

提交列表活动.java

 // this works!
 submitListRefreshLayout = (SwipeRefreshLayout)findViewById(R.id.swipeContainerSubmitList);
 submitListRefreshLayout.setRefreshing(true);

SettingActivity.java

// This throws an error
LayoutInflater inflator = LayoutInflater.from(getApplicationContext());
View layout = inflator.inflate(R.layout.activity_submitlist, null);
SwipeRefreshLayout submitList = layout.findViewById(R.id.swipeContainerSubmitList);
submitList.setRefreshing(true);

抛出错误：

android.view.InflateException: Binary XML file line #10: Binary XML file line #10: Error inflating class <unknown>
    Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class <unknown>
    Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Constructor.newInstance0(Native Method)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
        at android.view.LayoutInflater.createView(LayoutInflater.java:645)

Q1：是否可以在 SettingsActivity 中刷新 swipeRefreshLayout？

Q2：当按下后退按钮时，SubmitListActivity 再次滑入 -> 有没有我可以在 SubmitListActivity 中放置的方法来捕捉这个并将逻辑放在后面？

标签： javaandroidswiperefreshlayout

解决方案

从另一个活动刷新 SwipeRefreshLayout

在另一个活动中调用一个活动的方法根本不是一个好习惯。对于您的问题，请遵循以下解决方案。

在您的方法中调用submitListRefreshLayout.setRefreshing(true);您的 SubmitlistActivity ，onRestartActivity()如下所示....

 @Override
    protected void onRestart() {
        super.onRestart();
        submitListRefreshLayout.setRefreshing(true);
    }

注意：- 每当您从 onRestart() 回来时settingActivity，SubmitlistActivity都会调用。

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