Question

有没有人知道如何使用RecyclerView进行流程布局？

如何动态更改跨度计数？

Answer 1

以下是完整的示例使用自定义库，其行为类似于列表GitHubLibrary TagLayout

示例代码： -

mAdapter.setSelectedList(1,3,5,7,8,9);

使用以下代码，您可以预先设置所需的选择： -

<target name="tests" depends="testscompile,mkdirtests_clean,mkdirtests">
   <junit fork="yes"  forkmode="once" haltonfailure="no"  printsummary="yes" >

    <jvmarg value="-javaagent:../JUnitlib/jmockit.jar"/> 

    <sysproperty key="jmockit-coverage-output" value="html"/>
    <sysproperty key="jmockit-coverage-outputDir" value="${reports.dir}"/>
    <sysproperty key="jmockit-coverage-srcDirs" value="${src}"/>
    <sysproperty key="jmockit-coverage-metrics" value="all"/>
    <classpath>
     <pathelement location="${classes}" />     
     <pathelement location="../JUnitlib/jmockit.jar" />
     <pathelement location="../JUnitlib/junit-4.12.jar" />
     <pathelement location="../JUnitlib/hamcrest-core-1.3.jar" />
     <fileset dir="../WebContent/WEB-INF/lib">
     <include name="**/*.jar"/>
     </fileset>
     <fileset dir="${tomcat.root}">
      <include name="lib/log4j-1.2.17.jar"/>
     </fileset>
    </classpath>

    <batchtest todir="${docs.dir}">
    <fileset dir="${classes}">
    <include name="**/*Test.class" />
    </fileset>
     </batchtest>
        <formatter type="xml"/>

      </junit>

<!-- Junit Report generation -->

   <junitreport todir="${reports.dir}">
          <fileset dir="${docs.dir}">
            <include name="TEST-*.xml" />
          </fileset>
      <report todir="${reports.dir}" />
        </junitreport>

   <antcall target="report.zip"/>
  </target>

将显示如下结果： -

Answer 2

您可以使用FlowLayout并将其作为ScrollView的子项。存储库中提供了用于流布局的示例。

＆＃13;

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <com.wefika.flowlayout.FlowLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="start|top"
            android:minHeight="50dp">

            <Button
                android:id="@+id/button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="New Button" />

            <Button
                android:id="@+id/button1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="New Button" />

            <Button
                android:id="@+id/button2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="New Button" />

            <Button
                android:id="@+id/button3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="New Button" />
        </com.wefika.flowlayout.FlowLayout>


        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hello world" />

    </LinearLayout>

</ScrollView>

＆＃13;

您还可以使用示例中给出的以下方法以编程方式添加或删除视图。

＆＃13;

 public void addItem(View view) {

        int color = getResources().getColor(R.color.holo_blue_dark);

        View newView = new View(this);
        newView.setBackgroundColor(color);

        FlowLayout.LayoutParams params = new FlowLayout.LayoutParams(100, 100);
        params.rightMargin = 10;
        newView.setLayoutParams(params);

        mFlowLayout.addView(newView);
    }

    public void removeItem(View view) {

        mFlowLayout.removeView(getLastView());

    }

    public void toggleItem(View view) {

        View last = getLastView();

        if(last.getVisibility() == View.VISIBLE) {
            last.setVisibility(View.GONE);
        } else {
            last.setVisibility(View.VISIBLE);
        }

    }

    private View getLastView() {
        return mFlowLayout.getChildAt(mFlowLayout.getChildCount() - 1);
    }

＆＃13;

Answer 3

最好的解决方案是将 RecyclerView 与 google FlexLayoutManager 结合使用

// Set layout manager
    val layoutManager = FlexboxLayoutManager(context)
    recyclerview.layoutManager = layoutManager

// Now you can add your normal recyclerview adapter

recyclerview.adapter = MyListAdapter(list)

在 build.gradle 文件中添加以下依赖项

 implementation 'com.google.android:flexbox:2.0.1'

这会起到很好的作用。

有谁知道如何使用RecyclerView进行流程布局？

3 个答案: