026 Android 带不同类型条目的listview(纯文本类型的条目，图片+文字类型的条目)+读取内存空间、手机进程信息+常驻悬浮框

1.目标效果

带不同类型条目的listview(纯文本类型的条目，图片+文字类型的条目)+常驻悬浮框

2.页面布局文件

(1)activity_process_manager.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout 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:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    tools:context=".ProcessManagerActivity">

    <TextView

        style="@style/TitleStyle"

        android:text="进程管理" />

    <RelativeLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:padding="5dp">

        <TextView

            android:id="@+id/tvPM_process_number"

            android:text="进程总数"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content" />

        <TextView

            android:id="@+id/tvPM_memory_info"

            android:layout_alignParentRight="true"

            android:text="剩余/总共"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content" />

    </RelativeLayout>

    <!--利用帧布局实现常驻悬浮框的效果(需要配合java后台代码)-->

    <FrameLayout

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1">

        <!--让listview占满页面的剩余部分-->

        <ListView

            android:id="@+id/lv_process_manager"

            android:layout_width="match_parent"

            android:layout_height="match_parent">

        </ListView>

        <TextView

            android:background="#ccc"

            android:id="@+id/tv_des"

            android:textColor="#000"

            android:textSize="18dp"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"/>

    </FrameLayout>

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content">

        <Button

            android:id="@+id/btPM_all_select"

            android:text="全选"

            android:layout_width="0dp"

            android:layout_height="wrap_content"

            android:layout_weight="1"/>

        <Button

            android:id="@+id/btPM_reverse_select"

            android:text="反选"

            android:layout_width="0dp"

            android:layout_height="wrap_content"

            android:layout_weight="1"/>

        <Button

            android:id="@+id/btPM_setting"

            android:text="设置"

            android:layout_width="0dp"

            android:layout_height="wrap_content"

            android:layout_weight="1"/>

    </LinearLayout>

</LinearLayout>

(2)listview_process_manager_item_title

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="wrap_content">

    <TextView

        android:padding="5dp"

        android:id="@+id/tvAM_title"

        android:text="标题"

        android:textColor="#000"

        android:background="@color/gray"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

</LinearLayout>

(3)listview_process_manager_item.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:padding="5dp">

    <ImageView

        android:id="@+id/iv_app_icon"

        android:layout_centerVertical="true"

        android:background="@mipmap/ic_launcher"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" />

    <TextView

        android:layout_marginTop="5dp"

        android:id="@+id/tvLV_name"

        android:text="应用名称"

        android:textColor="#000000"

        android:textSize="18dp"

        android:layout_toRightOf="@+id/iv_app_icon"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" />

    <TextView

        android:id="@+id/tvLV_memory_info"

        android:text="占用内存大小"

        android:textColor="#000000"

        android:layout_marginTop="10dp"

        android:textSize="18dp"

        android:layout_below="@+id/tvLV_name"

        android:layout_toRightOf="@+id/iv_app_icon"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" />

    <CheckBox

        android:id="@+id/cb_process_manager"

        android:layout_alignParentRight="true"

        android:layout_centerVertical="true"

        android:clickable="false"

        android:focusableInTouchMode="false"

        android:focusable="false"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" />

</RelativeLayout>

3.java后台代码

package com.example.administrator.test62360safeguard;

import android.annotation.SuppressLint;

import android.os.Handler;

import android.os.Message;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.text.format.Formatter;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AbsListView;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import com.example.administrator.test62360safeguard.Entity.AppInfoBean;

import com.example.administrator.test62360safeguard.Entity.ProcessInfoBean;

import com.example.administrator.test62360safeguard.engine.AppInfoProvider;

import com.example.administrator.test62360safeguard.engine.ProcessInfoProvider;

import java.util.ArrayList;

import java.util.List;

public class ProcessManagerActivity extends AppCompatActivity {

    private TextView tvPM_process_number;

    private TextView tvPM_memory_info;

    private ListView lv_process_manager;

    Button btPM_all_select;

    Button btPM_reverse_select;

    Button btPM_setting;

    List<ProcessInfoBean> processInfoList;

    List<ProcessInfoBean> systemProcessInfoList;

    List<ProcessInfoBean> customerProcessInfoList;

    @SuppressLint("HandlerLeak")

    Handler handler=new Handler(){

        @Override

        public void handleMessage(Message msg) {

            lv_process_manager.setAdapter(new MyAdapter());

            if(customerProcessInfoList!=null){

                tv_des.setText("用户进程("+customerProcessInfoList.size()+")");

            }

        }

    };

    private TextView tv_des;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_process_manager);

        initUI();

        initTitleData();

        initList();

    }

    private void initList() {

        lv_process_manager = findViewById(R.id.lv_process_manager);

        new Thread(){

            @Override

            public void run() {

                processInfoList = ProcessInfoProvider.getProcessInfo(getApplicationContext());

                systemProcessInfoList = new ArrayList<>();

                customerProcessInfoList = new ArrayList<>();

                for (ProcessInfoBean processInfoBean : processInfoList) {

                    if(processInfoBean.isSystem){

                        //系统进程

                        systemProcessInfoList.add(processInfoBean);

                    }else {

                        //用户进程

                        customerProcessInfoList.add(processInfoBean);

                    }

                }

                handler.sendEmptyMessage(0);

            }

        }.start();

    }

    private void initTitleData() {

        int processCount = ProcessInfoProvider.getProcessCount(this);

        tvPM_process_number.setText("进程总数："+processCount);

        //获取可用内存大小，并且格式化

        long availSpace = ProcessInfoProvider.getAvailSpace(this);

        String availSpaceStr = Formatter.formatFileSize(this, availSpace);

        //获取运行内存大小，并且格式化

        long totalSpace = ProcessInfoProvider.getTotalSpace(this);

        String totalSpaceStr = Formatter.formatFileSize(this, totalSpace);

        tvPM_memory_info.setText("剩余/总共："+availSpaceStr+"/"+totalSpaceStr);

    }

    private void initUI() {

        tvPM_process_number = findViewById(R.id.tvPM_process_number);

        tvPM_memory_info = findViewById(R.id.tvPM_memory_info);

        lv_process_manager = findViewById(R.id.lv_process_manager);

        btPM_all_select = findViewById(R.id.btPM_all_select);

        btPM_reverse_select = findViewById(R.id.btPM_reverse_select);

        btPM_setting = findViewById(R.id.btPM_setting);

        tv_des = findViewById(R.id.tv_des);

        btPM_all_select.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

            }

        });

        btPM_all_select.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

            }

        });

        btPM_setting.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

            }

        });

        //给listview设置滚动监听事件,实现常驻悬浮框的效果

        lv_process_manager.setOnScrollListener(new AbsListView.OnScrollListener() {

            @Override

            public void onScrollStateChanged(AbsListView view, int scrollState) {

            }

            @Override

            public void onScroll(AbsListView view, int firstVisibleItem,

                                 int visibleItemCount, int totalItemCount) {

                //滚动过程中调用方法

                //AbsListView中view就是listView对象

                //firstVisibleItem第一个可见条目索引值

                //visibleItemCount当前一个屏幕的可见条目数

                //总共条目总数

                if(customerProcessInfoList!=null && systemProcessInfoList!=null){

                    if(firstVisibleItem>=customerProcessInfoList.size()+1){

                        //滚动到了系统条目

                        tv_des.setText("系统进程("+systemProcessInfoList.size()+")");

                    }else{

                        //滚动到了用户应用条目

                        tv_des.setText("用户进程("+customerProcessInfoList.size()+")");

                    }

                }

            }

        });

    }

    /**

     * 带不同类型条目的listview(纯文本类型的条目，图片+文字类型的条目)

     */

    private class MyAdapter extends BaseAdapter {

        //获取适配器中条目类型的总数,此处修改为两种(纯文本，图片+文字)

        @Override

        public int getViewTypeCount() {

            return super.getViewTypeCount()+1;

        }

        //指定索引指向的条目类型，条目类型状态码指定(0(复用系统)，1)

        @Override

        public int getItemViewType(int position) {

            if(position==0||position==customerProcessInfoList.size()+1){

                //返回0，代表纯文字的状态码

                return 0;

            }else {

                //返回1，代表图片+文字状态码

                return 1;

            }

        }

        //给listview添加两个描述条目

        @Override

        public int getCount() {

            return systemProcessInfoList.size()+customerProcessInfoList.size()+2;

        }

        @Override

        public ProcessInfoBean getItem(int position) {

            //因为加了两个描述条目后，条目的顺序发生了改变

            if(position==0||position==customerProcessInfoList.size()+1){

                return null;

            }else {

                if(position<customerProcessInfoList.size()+1){

                    return customerProcessInfoList.get(position-1);

                }else {

                    return systemProcessInfoList.get(position-customerProcessInfoList.size()-2);

                }

            }

        }

        @Override

        public long getItemId(int position) {

            return position;

        }

        @Override

        public View getView(int position, View convertView, ViewGroup parent) {

            int type=getItemViewType(position);

            if(type==0){

                //在position==0或position==customerAppInfoList.size()+1这两处展示纯文本条目

                //采用优化后的listview

                ViewTitleHolder viewTitleHolder=null;

                if(convertView==null){

                    convertView=View.inflate(getApplicationContext(),R.layout.listview_app_manager_item_title,null);

                    viewTitleHolder=new ViewTitleHolder();

                    viewTitleHolder.tvAM_title = convertView.findViewById(R.id.tvAM_title);

                    convertView.setTag(viewTitleHolder);

                }else {

                    viewTitleHolder= (ViewTitleHolder) convertView.getTag();

                }

                if(position==0){

                    viewTitleHolder.tvAM_title.setText("用户进程("+customerProcessInfoList.size()+")");

                }else {

                    viewTitleHolder.tvAM_title.setText("系统进程("+systemProcessInfoList.size()+")");

                }

                return convertView;

            }else {

                //展示图片+文字条目

                //采用优化后的listview

                ViewHolder viewHolder=null;

                if(convertView==null){

                    convertView=View.inflate(getApplicationContext(),R.layout.listview_process_manager_item,null);

                    viewHolder=new ViewHolder();

                    viewHolder.iv_app_icon = convertView.findViewById(R.id.iv_app_icon);

                    viewHolder.tvLV_name = convertView.findViewById(R.id.tvLV_name);

                    viewHolder.tvLV_memory_info= convertView.findViewById(R.id.tvLV_memory_info);

                    viewHolder.cb_process_manager=convertView.findViewById(R.id.cb_process_manager);

                    convertView.setTag(viewHolder);

                }else {

                    viewHolder= (ViewHolder) convertView.getTag();

                }

                viewHolder.iv_app_icon.setBackgroundDrawable(getItem(position).icon);

                viewHolder.tvLV_name.setText(getItem(position).name);

                String sizeStr = Formatter.formatFileSize(getApplicationContext(), getItem(position).memSize);

                viewHolder.tvLV_memory_info.setText(sizeStr);

                //如果包名为当前应用，则隐藏checkbox

                if(getItem(position).packageName.equals(getPackageName())){

                    viewHolder.cb_process_manager.setVisibility(View.GONE);

                }else {

                    viewHolder.cb_process_manager.setVisibility(View.VISIBLE);

                }

                viewHolder.cb_process_manager.setChecked(getItem(position).isCheck);

                return convertView;

            }

        }

        private class ViewHolder {

            ImageView iv_app_icon;

            TextView tvLV_name;

            TextView tvLV_memory_info;

            CheckBox cb_process_manager;

        }

        private class ViewTitleHolder {

            TextView tvAM_title;

        }

    }

}

4.效果图