小编Tej*_*eti的帖子

我正在使用带有Coordinator布局的NestedScrollView.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.design.widget.CoordinatorLayout
    android:id="@+id/coordinator_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <...AppBarLayout
        android:id="@+id/appBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:toolbarId="@+id/toolbar"
            app:contentScrim="@color/my_primary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

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

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                app:layout_collapseMode="pin" />

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

    <android.support.v4.widget.NestedScrollView
        android:id="@+id/nestedScrollView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">
        <FrameLayout
            android:id="@+id/frame_layout_2"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
</RelativeLayout>

我想添加一个滚动条来使用它拖动滚动视图(快速滚动).看起来NestedScrollView没有fastScroll属性.

我尝试添加

    android:scrollbars="vertical"
    android:fadeScrollbars="false"
    android:fastScrollEnabled="true"
    android:fastScrollAlwaysVisible="true"

所有这些都没有用.

我对android编程很新.我想知道代码(Function)在音乐播放器中返回albumart的图像plz解释我应该传递什么参数,我可以将文件路径传递给函数plz帮助!我在这里发布我的代码下面的plz帮助!

imported required libraries

public class SongsManager {
    // SDCard Path
    final String MEDIA_PATH = new String("/sdcard/");
    private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();

    // Constructor
    public SongsManager(){

    }
    public ArrayList<HashMap<String, String>> getPlayList(){
        File home = new File(MEDIA_PATH);

        if (home.listFiles(new FileExtensionFilter()).length > 0) {
            for (File file : home.listFiles(new FileExtensionFilter())) {
                HashMap<String, String> song = new HashMap<String, String>();
                song.put("songTitle", file.getName().substring(0, (file.getName().length() - 4)));
                song.put("songPath", file.getPath());
                // Adding each song to SongList
                songsList.add(song);
            }
        }
        // return songs list array …