Android学习之获取系统应用信息列表的实现

前言：

好几天电脑打不开CSDN博客，也不知道怎么回事，今天下班回来突然能打开了，遂将周末实现的一个效果贴上。

实现功能：

获取手机应用图标，名称，时间（安装时间/更新时间），大小，侧滑删除应用，点击应用图标分享等功能。

目标效果：

思路:RecylerView+swipereveallayout

贴上dependencies

介绍：Glide实现图片加载，EventBus通信，swipereveallayout实现侧滑。

获取数据源：

   private ArrayList<AppInfoModel> getData() {
        ArrayList<AppInfoModel> list = new ArrayList<>();
        PackageManager mPackageManager = getApplicationContext().getPackageManager();
        packageInfoList = (ArrayList<PackageInfo>) mPackageManager.getInstalledPackages(0);
        for (PackageInfo packageInfo : packageInfoList) {
            AppInfoModel model = new AppInfoModel();
            model.setName(getApplicationName(packageInfo.applicationInfo.packageName, mPackageManager));
            model.setIcon(getAppliactionIcon(packageInfo, mPackageManager));
            model.setTime(getDate(packageInfo.lastUpdateTime));
            model.setSize(new File(packageInfo.applicationInfo.sourceDir).length() / 1024 / 1024 + "MB");
            list.add(model);
        }
        return list;
    }

获取应用名：

/**
     * 获取应用的名称
     */
    public String getApplicationName(String packageName, PackageManager packageManager) {
        String applicationName = null;
        try {
            ApplicationInfo applicationInfo = packageManager.getApplicationInfo(packageName, 0);
            applicationName = (String) packageManager.getApplicationLabel(applicationInfo);
        } catch (PackageManager.NameNotFoundException e) {

        }
        return applicationName;
    }

获取应用的Icon

 /**
     * 获取应用的Icon
     */
    public Drawable getAppliactionIcon(PackageInfo packageInfo, PackageManager packageManager) {
        Drawable appliactionIcon = packageInfo.applicationInfo.loadIcon(packageManager);
        return appliactionIcon;
    }

生成时间

/**
     * 生成时间
     */
    public static String getDate(long time) {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date = new Date(time);
        String formatedDate = simpleDateFormat.format(date);
        return formatedDate;
    }

EventBus实现通信

    //事件3接收者：在主线程接收
    public void onEventMainThread(ClickEvent event) {
        switch (event.type) {
            case ClickEvent.CLICK_ITEM:
                int position = (int) event.data;
                File apkFile = new File(packageInfoList.get(position).applicationInfo.sourceDir);
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_SEND);
                intent.setType("*/*");
                intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(apkFile));
                startActivity(intent);
                break;
        }
    }

适配器：

package com.example.wangchang.testqqfile.adapter;

import android.os.Bundle;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.chauthai.swipereveallayout.SwipeRevealLayout;
import com.chauthai.swipereveallayout.ViewBinderHelper;
import com.example.wangchang.testqqfile.R;
import com.example.wangchang.testqqfile.bean.AppInfoModel;
import com.example.wangchang.testqqfile.event.ClickEvent;


import java.util.ArrayList;

import de.greenrobot.event.EventBus;

/**
 * Created by WangChang on 2016/5/7.
 */
public class DemoAdapter extends RecyclerView.Adapter<DemoAdapter.DemoViewHolder> {

    private ArrayList<AppInfoModel> list = new ArrayList<>();
    private final ViewBinderHelper viewBinderHelper = new ViewBinderHelper();


    public void getData(ArrayList<AppInfoModel> data) {
        list.clear();
        if (data != null) {
            list.addAll(data);
        }
        notifyDataSetChanged();
    }

    @Override
    public DemoAdapter.DemoViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new DemoViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false));
    }

    @Override
    public void onBindViewHolder(DemoAdapter.DemoViewHolder holder, int position) {
        holder.setData(list.get(position));

    }

    public void saveStates(Bundle outState) {
        viewBinderHelper.saveStates(outState);
    }

    public void restoreStates(Bundle inState) {
        viewBinderHelper.restoreStates(inState);
    }

    @Override
    public int getItemCount() {
        return list != null ? list.size() : 0;
    }

    public class DemoViewHolder extends RecyclerView.ViewHolder {

        private TextView name, time, size;
        private ImageView icon;
        private SwipeRevealLayout swipeRevealLayout;
        private View deleteLayout;
        public DemoViewHolder(View itemView) {
            super(itemView);
            name = (TextView) itemView.findViewById(R.id.name);
            time = (TextView) itemView.findViewById(R.id.time);
            size = (TextView) itemView.findViewById(R.id.size);
            icon = (ImageView) itemView.findViewById(R.id.icon);
            swipeRevealLayout= (SwipeRevealLayout) itemView.findViewById(R.id.swipe_layout);
            deleteLayout = itemView.findViewById(R.id.delete_layout);
            icon.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    EventBus.getDefault().post(new ClickEvent(ClickEvent.CLICK_ITEM, getAdapterPosition()));
                }
            });
            deleteLayout.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    list.remove(getAdapterPosition());
                    notifyItemRemoved(getAdapterPosition());
                }
            });

        }

        void setData(AppInfoModel model) {
            if (model != null) {
                viewBinderHelper.bind(swipeRevealLayout,model.getName());
                name.setText(model.getName());
                time.setText(model.getTime());
                size.setText(model.getSize());
                icon.setImageDrawable(model.getIcon());

            }
        }
    }
}

item布局，包含侧滑布局

<?xml version="1.0" encoding="utf-8"?>
<com.chauthai.swipereveallayout.SwipeRevealLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/swipe_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="10dp"
    app:dragEdge="right"
    app:mode="same_level">

    <FrameLayout
        android:id="@+id/delete_layout"
        android:layout_width="wrap_content"
        android:layout_height="70dp"
        android:background="#ffcc0000">

        <TextView
            android:layout_width="70dp"
            android:layout_height="match_parent"
            android:background="@android:color/holo_red_dark"
            android:gravity="center"
            android:text="Delete"
            android:textColor="@android:color/white" />
    </FrameLayout>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:padding="10dp">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="70dp"
                android:orientation="horizontal">

                <ImageView
                    android:id="@+id/icon"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:src="@mipmap/ic_launcher" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="24dp"
                    android:layout_toRightOf="@+id/icon"
                    android:orientation="vertical">

                    <TextView
                        android:id="@+id/name"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:ellipsize="middle"
                        android:singleLine="true"
                        android:textColor="@android:color/black"
                        android:textStyle="bold" />

                    <TextView
                        android:id="@+id/size"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="5dp"
                        android:textSize="10sp" />

                    <TextView
                        android:id="@+id/time"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="5dp"
                        android:textColor="#aaaaaa"
                        android:textSize="10sp" />
                </LinearLayout>
            </LinearLayout>

            <View
                android:layout_width="match_parent"
                android:layout_height="0.5dp"
                android:background="#E0E0E0" />
        </LinearLayout>
    </FrameLayout>
</com.chauthai.swipereveallayout.SwipeRevealLayout>

具体请参考：

https://github.com/chthai64/SwipeRevealLayout

实现效果：

侧滑效果：

分享效果：

效果就到这，源码下载地址

http://pan.baidu.com/s/1gftwfon