Android代码-MaterialDesign风格的列表滚动字母提示控件ScrollBar

MaterialScrollBar An Android library that brings the Material Design 5.1 scrollbar to pre-5.1 devices. Designed for Android's recyclerView. Video Image Preview Google Play - Test Out the App Donate Table of Contents Gradle Documentation How to use My recyclerView elements aren't all the same size! What do I do? Indicators Specific Indicators License Gradle allprojects { repositories { maven { url 'https://jitpack.io' } } } dependencies {    implementation 'com.github.tu

package com.turingtechnologies.materialscrollbardemo;

import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import androidx.appcompat.app.AppCompatActivity;

import com.turingtechnologies.materialscrollbardemo.Activities.MainActivity;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class AppData {

    private static List pkgAppsList;
    static ArrayList pkgLabelList = new ArrayList<>（）;
    static ArrayList pkgIconList = new ArrayList<>（）;
    static ArrayList pkgDateList = new ArrayList<>（）;

    public static void processApps（final AppCompatActivity activity） {
        if（!pkgLabelList.isEmpty（）） {
            openMainActivity（activity）;
            return;
        }
        //noinspection WrongConstant
        pkgAppsList = activity.getPackageManager（）.getInstalledApplications（PackageManager.GET_ACTIVITIES）;
        for（int i = 0; i < pkgAppsList.size（）; i++） {
            if（activity.getPackageManager（）.getLaunchIntentForPackage（pkgAppsList.get（i）.packageName） == null || （!BuildConfig.DEBUG && pkgAppsList.get（i）.packageName.contains（AppData.class.getPackage（）.getName（）））） {
                pkgAppsList.remove（i）;
                i--;
            }
        }

        new AppInfoTask（）.execute（activity）;
    }

    private static class AppInfoTask extends AsyncTask {

        @Override
        protected AppCompatActivity doInBackground（AppCompatActivity... acts） {
            AppCompatActivity activity = acts[0];
            Collections.sort（pkgAppsList （o1 o2） -> o1.loadLabel（activity.getPackageManager（））.toString（）.compareToIgnoreCase（o2.loadLabel（activity.getPackageManager（））.toString（）））;
            for（ApplicationInfo appInfo : pkgAppsList） {
                pkgLabelList.add（appInfo.loadLabel（activity.getPackageManager（））.toString（））;
                pkgIconList.add（appInfo.loadIcon（activity.getPackageManager（）））;
                try {
                    pkgDateList.add（activity.getPackageManager（）.getPackageInfo（appInfo.packageName 0）.firstInstallTime）;
                } catch （PackageManager.NameNotFoundException e） {
                    e.printStackTrace（）;
                }
            }
            pkgAppsList = null;
            return activity;
        }

        @Override
        protected void onPostExecute（AppCompatActivity activity） {
            openMainActivity（activity）;
        }
    };

    private static void openMainActivity（AppCompatActivity activity） {
        Intent main = new Intent（activity.getApplicationContext（） MainActivity.class）;
        activity.startActivity（main）;
    }

}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\
     文件         122  2018-11-30 01:21  MaterialScrollBar-master\.gitignore
     文件         226  2018-11-30 01:21  MaterialScrollBar-master\CONTRIBUTING.md
     文件       11357  2018-11-30 01:21  MaterialScrollBar-master\LICENSE
     文件        8641  2018-11-30 01:21  MaterialScrollBar-master\README.md
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\
     文件           7  2018-11-30 01:21  MaterialScrollBar-master\app\.gitignore
     文件         907  2018-11-30 01:21  MaterialScrollBar-master\app\build.gradle
     文件         665  2018-11-30 01:21  MaterialScrollBar-master\app\proguard-rules.pro
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\
     文件        1534  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\AndroidManifest.xml
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\Activities\
     文件        2043  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\Activities\DateActivity.java
     文件        2688  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\Activities\IconActivity.java
     文件        2008  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\Activities\MainActivity.java
     文件        2208  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\Activities\MultiFragmentActivity.java
     文件        2008  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\Activities\NameActivity.java
     文件        1022  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\Activities\SplashActivity.java
     文件        2825  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\AppData.java
     文件        2516  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\DemoAdapter.java
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\Fragments\
     文件         996  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\Fragments\FirstLetterFragment.java
     文件        1809  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\java\com\turingtechnologies\materialscrollbardemo\IconAdapter.java
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\res\
     目录           0  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\res\layout\
     文件         963  2018-11-30 01:21  MaterialScrollBar-master\app\src\main\res\layout\activity_main.xml
............此处省略83个文件信息