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