安卓读取信息列表

安卓读取信息列表

1. 实现的功能

① 能够选定保存的方式，一种是xml形式保存，另外一种是纯文本形式的保存

② 按照下拉列表，可以选择保存以下四种信息

<item>备份所有信息</item>
<item>备份接收信息</item>
<item>备份发送信息</item>
<item>备份存在号码信息</item>

③ 点击查看按钮， 通过列表展示所有的信息

2. 实现效果图

3.实现

步骤① 实现基本的布局框架，主界面的布局采用线性布局，双按钮和单选框以及下拉栏，展示信息采用ListView

activity_main.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"
    android:background="@color/xx"
    tools:context=".MainActivity">
    <ListView
        android:id="@+id/list_1"
        android:layout_width="match_parent"
        android:layout_height="488dp"></ListView>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal">

        <Spinner
            android:id="@+id/spinner1"
            android:layout_width="118dp"
            android:layout_height="match_parent"
            android:layout_marginLeft="50dp"
            android:entries="@array/degree"
            android:spinnerMode="dialog" />
        <Button
            android:id="@+id/btn_1"
            android:layout_marginLeft="50dp"
            android:layout_width="wrap_content"
            android:layout_height="50dp"
            android:background="@drawable/button_round"
            android:text="查看信息" />
    </LinearLayout>
    <LinearLayout
        android:layout_marginTop="10dp"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal">
       <TextView
           android:gravity="center"
           android:layout_width="wrap_content"
           android:layout_height="match_parent"
           android:text="保存格式"
           />
        <RadioGroup
            android:id="@+id/radiogroup"
            android:layout_width="163dp"
            android:layout_height="50dp"
            android:layout_marginLeft="0dp"
            android:orientation="horizontal">

            <RadioButton
                android:id="@+id/radiobutton1"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:text="xml" />

            <RadioButton
                android:id="@+id/radiobutton2"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:text="txt" />

        </RadioGroup>
        <Button
            android:layout_toRightOf="@+id/radiogroup"
            android:id="@+id/btn_2"
            android:background="@drawable/button_round"
            android:layout_width="wrap_content"
            android:text="备份信息"
            android:layout_height="50dp"/>
    </LinearLayout>
</LinearLayout>

button_round.xml 按钮的美化(圆角 ，背景)

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#687fa5">

    </solid>
    <corners
        android:topLeftRadius="20dp"
        android:topRightRadius="20dp"
        android:bottomLeftRadius="20dp"
        android:bottomRightRadius="20dp"
        />
</shape>

items.xml 每一个列表项的布局文件 ，实际显示只有前四个textview，最后一个作为分割

<?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="match_parent"
    android:padding="5dp"
    android:orientation="vertical">

    <TextView
        android:id="@+id/txt1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
         />
    <TextView
        android:id="@+id/txt2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        />
    <TextView
        android:id="@+id/txt3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        />
    <TextView
        android:id="@+id/txt4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        />
    <TextView
        android:id="@+id/txt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        />
</LinearLayout>

strings.xml

<resources>
    <string name="app_name">ImagesProviderDemo</string>
    <string-array name="degree" Size="25sp">
        <item>备份所有信息</item>
        <item>备份接收信息</item>
        <item>备份发送信息</item>
        <item>备份存在号码信息</item>
    </string-array>
</resources>

步骤② 创建一个javaBean作为打包信息类

Messageinfo.java

package com.example.imagesproviderdemo;

public class Messageinfo {
    private int _id;//主键
    private String address;//发送地址
    private long date;//发送时间
    private int type;//类型
    private String body;//内容
    //构造方法
    public Messageinfo(int _id,String address,String body , int type, long date) {
        this._id = _id;
        this.address = address;
        this.date = date;
        this.type = type;
        this.body = body;
    }
    public String getAddress()
    {
        return address;
    }
    public  String getBody()
    {
        return body;
    }
    public int  getFormatType()
    {
        return type;
    }
    public  long getFormatDate()
    {
        return date;
    }
}

步骤③ 构建ListView的Adapter

TextAdapter.java

package com.example.imagesproviderdemo;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import java.util.HashMap;
import java.util.List;
import java.util.zip.Inflater;

public class TextAdapter extends BaseAdapter {
    public List<Messageinfo>list;
    private LayoutInflater mInflater;
    public TextAdapter(List<Messageinfo>list, Context context)
    {
        super();
        this.list = list;/// 接收数据
        mInflater = LayoutInflater.from(context);
    }
    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int i) {
        return list.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder holder = null;
        if(view == null) {
            view = mInflater.inflate(R.layout.items, viewGroup,false);
            //   可以被重用的视图   两个参数  第一个参数就是   分布的资源id   第二个就是填充的根视图
            holder = new ViewHolder();
            holder.txt1 = (TextView) view.findViewById(R.id.txt1);
            holder.txt2 = (TextView) view.findViewById(R.id.txt2);
            holder.txt3 = (TextView) view.findViewById(R.id.txt3);
            holder.txt4 = (TextView) view.findViewById(R.id.txt4);
            view.setTag(holder);
        }
        else
            holder = (ViewHolder) view.getTag();
        Messageinfo mess = list.get(i);
        /// 填充数据
        holder.txt1.setText("手机号码：" + mess.getAddress());
        holder.txt2.setText( "短信内容：" + mess.getBody());
        holder.txt3.setText("短信类型：" + mess.getFormatType());
        holder.txt4.setText("短信发送时间：" + mess.getFormatDate());
        return view;
    }
    /// 复用类
    public final class ViewHolder{
        public TextView txt1;
        public TextView txt2;
        public TextView txt3;
        public TextView txt4;
    }
}

步骤④ 添加需要的权限，在Manifests之中添加读取通讯录权限以及读取信息的权限

<uses-permission android:name="android.permission.READ_SMS" />
<!--读取联系人的权限-->
<uses-permission android:name="android.permission.READ_CONTACTS" />

步骤⑤ 设计主界面监听以及适配，权限申请

MainActivity.java

package com.example.imagesproviderdemo;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.MediaStore;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RadioGroup;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import org.w3c.dom.Text;

import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MainActivity extends AppCompatActivity {
    private Button btn_1,btn_2;
    private List<Messageinfo>info;
    /// 储存信息
    private List<String> phonenumber;
    /// 存储通讯录电话
    private RadioGroup radioGroup;
    Spinner spinner;
    String check="";
    /// 记录保存文本的格式
    String checkI="";
    /// 判断当前选择保存文本
    private int flag = 0;
    /// 标记位，0代表所有信息，1代表发送的信息，2代表接收的信息，3代表已存在通讯录电话的信息
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 获取控件
        btn_1 = (Button) findViewById(R.id.btn_1);
        btn_2 = (Button) findViewById(R.id.btn_2);
        radioGroup = (RadioGroup)findViewById(R.id.radiogroup);
        info = new ArrayList<Messageinfo>();
        read_number();  /// 读取通讯录所有电话
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                //checkId就是当前选中的RadioButton，记录选中
                check = checkedId==R.id.radiobutton1 ? "xml" : "txt";
            }
        });
        spinner = (Spinner) findViewById(R.id.spinner1);
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
               // 记录选中
                checkI = (String) spinner.getSelectedItem();
            }
            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
        btn_1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_SMS)
                        != PackageManager.PERMISSION_GRANTED) {//运行时权限处理
                    ActivityCompat.requestPermissions(MainActivity.this,
                            new String[]{ Manifest.permission.READ_SMS }, 1);
                } else {
                /// 获取信息并显示
                    getMessage();
                }
            }
        });
        /// 备份信息  采用   SharedPreferences，在路径data/data/之下 记住他这个包名都是小写
        btn_2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
            /// 更新标记位并更新
                if (checkI.equals("备份接收信息"))
                {
                    flag = 1;
                }
                else if (checkI.equals("备份发送信息"))
                {
                    flag = 2;
                }
                else if(checkI.equals("备份存在号码信息"))
                {
                    flag = 3;
                }
                else
                {
                    flag = 0;
                }
                /// 如果选择txt
                if (check.equals("txt"))save_txt();
                else save_xml();;
                Toast.makeText(MainActivity.this,"备份成功",Toast.LENGTH_LONG).show();// toast长时间文本
            }
        });
    }
    public void read_number(){
        /// 申请权限
        if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.READ_CONTACTS)  !=
                PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this,
                    new String[]{ Manifest.permission.READ_CONTACTS }, 0);
        }
        /// 直接查询
        Cursor cursor = getContentResolver().query(
                ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
        phonenumber =new ArrayList<String>();
        //向下移动光标
        if (cursor != null) {
            while(cursor.moveToNext()) {
                /// 获取电话
                String number = cursor.getString(cursor.getColumnIndex(
                        ContactsContract.CommonDataKinds.Phone.NUMBER));
                phonenumber.add(number);
            }
        }
    }
    public void save_xml()
    {
        /// xml格式保存
        SharedPreferences shared = getSharedPreferences("data",MODE_PRIVATE);
        SharedPreferences.Editor editor = shared.edit();
        editor.clear();
        /// 由于前面的键不能同一个名字，所以才到后面加上一个i
        for (int i=0;i<info.size();++i){
            /// 不是想要的格式，丢弃
            if (flag!=info.get(i).getFormatType())
            {
                /// 0的时候所有信息都保存
                if (flag!=0)
                    continue;
            }
            if (flag==3)
            /// 选择了3，就匹通讯录
            {
                boolean vis = true;
                for (int j=0;j<phonenumber.size();++j)
                {
                     if (phonenumber.get(j).equals(""+info.get(i).getFormatDate()))
                     {
                         vis = false;
                         break;
                     }
                }
                if (vis) continue;
            }
            editor.putString("number"+i,info.get(i).getAddress());
            editor.putString("content"+i,info.get(i).getBody());
            editor.putInt("type"+i,info.get(i).getFormatType() );
            editor.putLong("time"+i,info.get(i).getFormatDate());
//                    System.out.println(info.get(i).getFormatDate());
        }
        editor.commit();///提交数据
    }
    public void save_txt()
    {
        FileOutputStream out = null;
        BufferedWriter writer = null;
        try {
            /// 文件流储存
            out = openFileOutput("data", Context.MODE_PRIVATE);
            writer = new BufferedWriter(new OutputStreamWriter(out));
            String Text="";
            for (int i=0;i<info.size();++i)
            {
                if (flag!=info.get(i).getFormatType())
                {
                    if (flag!=0)
                       continue;
                }
                if (flag==3)
                {
                    boolean vis = true;
                    for (int j=0;j<phonenumber.size();++j)
                    {
                        if (phonenumber.get(j).equals(""+info.get(i).getFormatDate()))
                        {
                            vis = false;
                            break;
                        }
                    }
                    if (vis) continue;
                }
                Text += "手机号码：" + info.get(i).getAddress() + "\n";
                Text += "短信内容：" + info.get(i).getBody() + "\n";
                Text += "短信类型：" + info.get(i).getFormatType() + "\n";
                Text += "短信发送时间：" + info.get(i).getFormatDate() + "\n\n";
            }
            writer.write(Text);
        } catch (IOException e) {
            e.printStackTrace();
        } finally
        {
            try {
                if (writer != null) {
                    writer.close();
                }
            }
            catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    public void getMessage()
    {
        Uri uri = Uri.parse("content://sms/"); //获取系统信息的 uri
        //获取 ContentResolver 对象
        ContentResolver resolver = getContentResolver();
        //通过 ContentResolver 对象查询系统短信
        Cursor cursor = resolver.query(uri, new String[]{"_id", "address",
                "body","type","date"}, null, null, null);
        if (cursor != null && cursor.getCount() > 0) {
//            txt1.setVisibility(View.VISIBLE);/
            if (info != null) info.clear();//清除集合中的数据
            while (cursor.moveToNext()) {
                int _id = cursor.getInt(0);
                String address = cursor.getString(1);
                String body = cursor.getString(2);
                int type = cursor.getInt(3);
                long date=cursor.getLong(4);
                Messageinfo messinfo = new Messageinfo(_id, address, body,type,date);
                info.add(messinfo);
            }
            ListView AlbumList = (ListView)findViewById(R.id.list_1);
            /// 添加适配器
            TextAdapter adapter = new TextAdapter(info,this);
            AlbumList.setAdapter(adapter);
            cursor.close();
        }
    }
    /// 申请权限时会回调以下方法，故需要进行重写，申请成功权限和申请不成功的分支结果
    @Override
    public void onRequestPermissionsResult( int requestCode, @NonNull String[] permissions, @NonNull int[] grant)
    {
         super.onRequestPermissionsResult(requestCode,permissions,grant);
        switch (requestCode) {
            case 1:
                if (grant.length > 0 && grant[0] == PackageManager.PERMISSION_GRANTED) {
                    getMessage();
                } else {
                    Toast.makeText(this, "You denied the permission", Toast.LENGTH_SHORT).show();
                }
                break;
            case 0:
                if (grant.length > 0 &&
                        grant[0] == PackageManager.PERMISSION_GRANTED) {
                    read_number();
                } else {
                    Toast.makeText(this, "You denied the permission", Toast.LENGTH_SHORT).show();
                }
                break;
            default:
        }
    }
}