Day16作业の广播接收者

最新推荐文章于 2025-07-06 21:20:04 发布

原创最新推荐文章于 2025-07-06 21:20:04 发布 · 194 阅读

CC 4.0 BY-SA版权

本文详细介绍了在安卓应用中实现登录与注册功能的方法，包括使用SQLite数据库进行用户信息存储，通过ContentProvider进行数据访问，以及利用广播接收者处理验证码验证流程。文章深入解析了LoginActivity与RegisterActivity的代码实现，涵盖了用户输入验证、数据库操作及广播通信等关键技术点。

广播接收者

- 作业展示
- - LoginActivity
  - 注册页面Activity

作业展示

LoginActivity

package com.example.day11_homework;

import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.example.day11_homework.sql.MySqlHelper;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MainActivity extends AppCompatActivity {

    private EditText editUser;
    private EditText editPwd;
    private Button buttonLogin;
    private Button buttonToRe;

    private ContentResolver contentResolver;
    private Uri uri;

    private List<String> list = new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        sql();

        initView();
    }

    private void sql() {
        uri = Uri.parse("content://com.pan.sql2");
        contentResolver = getContentResolver();

    }

    private void initView() {
        editUser = (EditText) findViewById(R.id.edit_user);
        editPwd = (EditText) findViewById(R.id.edit_pwd);
        buttonLogin = (Button) findViewById(R.id.button_login);
        buttonToRe = (Button) findViewById(R.id.button_toRe);


    }


    public void click(View view) {
        switch (view.getId()){
            case R.id.button_toRe:
                Intent intent = new Intent(MainActivity.this, RegisterActivity.class);
                startActivity(intent);
                break;

            case R.id.button_login:

                String user = editUser.getText().toString();
                String pwd = editUser.getText().toString();

                Cursor cursor = contentResolver.query(uri, null, null, null, null);
                if(cursor != null){
                    while(cursor.moveToNext()){
                        String name = cursor.getString(cursor.getColumnIndex("name"));
                        String tel = cursor.getString(cursor.getColumnIndex("tel"));

                       list.add(name+"-"+tel);
                    }
                }

                Toast.makeText(this, ""+list.toString(), Toast.LENGTH_SHORT).show();
                for (int i = 0; i < list.size(); i++) {
                    String s = list.get(i);
                    String[] split = s.split("-");
                    if(split[0].equals(user) && split[1].equals(pwd)){
                        Toast.makeText(this, "登陆成功!", Toast.LENGTH_SHORT).show();
                        list.clear();
                    }else{
                        Toast.makeText(this, "登录失败!", Toast.LENGTH_SHORT).show();
                        return;
                    }
                }

                break;
        }
    }
}

关于LoginActivity的外部类

SqlOpenHelper

package com.example.day11_homework.sql;

import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.support.annotation.Nullable;

public class MySqlHelper extends SQLiteOpenHelper {

    public MySqlHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
        super(context, name, factory, version);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("create table yzm(data varchar(20) primary key)");
        db.execSQL("create table user(name varchar(20) primary key,tel varchar(20))");

        db.beginTransaction();
        String yzm = "asbehtgrEWGTGNDGFEWSH1243255437769708GVDSG";

        for (int i = 0; i < 10; i++) {
            String str = "";
            for (int i1 = 0; i1 < 4; i1++) {
                char c = yzm.charAt((int) (Math.random() * yzm.length()));
                str += c;
            }
            ContentValues values = new ContentValues();
            values.put("data",str);
            db.insert("yzm",null,values);
        }

        db.setTransactionSuccessful();
        db.endTransaction();
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    }
}

用户账号密码的文件提供者

package com.example.day11_homework.sql;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;

public class MyContentProvider extends ContentProvider {
    private SQLiteDatabase db;
    public MyContentProvider() {
    }

    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        return db.delete("user",selection,selectionArgs);
    }

    @Override
    public String getType(Uri uri) {
        return null;
    }

    @Override
    public Uri insert(Uri uri, ContentValues values) {
        db.insert("user",null,values);
        return uri;
    }

    @Override
    public boolean onCreate() {
        MySqlHelper mySqlHelper = new MySqlHelper(getContext(), "work.db", null, 3);
        db = mySqlHelper.getReadableDatabase();
        if(db != null){
            return true;
        }
        return false;
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection,
                        String[] selectionArgs, String sortOrder) {
        Cursor user = db.query("user", projection, selection, selectionArgs, null, null, sortOrder);
        Cursor yzm = db.query("yzm",projection,selection,selectionArgs,null,null,sortOrder);

        return user;
    }

    @Override
    public int update(Uri uri, ContentValues values, String selection,
                      String[] selectionArgs) {
        return db.update("user",values,selection,selectionArgs);
    }
}

管理验证码的内容提供者

package com.example.day11_homework.sql;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;

public class MyContentYzm extends ContentProvider {

    private SQLiteDatabase db;
    public MyContentYzm() {
    }

    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        return db.delete("yzm",selection,selectionArgs);
    }

    @Override
    public String getType(Uri uri) {
        return null;
    }

    @Override
    public Uri insert(Uri uri, ContentValues values) {
        db.insert("yzm",null,values);
        return uri;
    }

    @Override
    public boolean onCreate() {
        MySqlHelper mySqlHelper = new MySqlHelper(getContext(), "wrok.db", null, 3);
        db = mySqlHelper.getReadableDatabase();
        if(db != null){
            return true;
        }
        return false;
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection,
                        String[] selectionArgs, String sortOrder) {
        return db.query("yzm",projection,selection,selectionArgs,null,null,sortOrder);
    }

    @Override
    public int update(Uri uri, ContentValues values, String selection,
                      String[] selectionArgs) {
        return update(uri,values,selection,selectionArgs);
    }
}

注册页面Activity

package com.example.day11_homework;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.Toast;

import com.example.day11_homework.sql.MyContentProvider;
import com.example.day11_homework.sql.MySqlHelper;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;

public class RegisterActivity extends AppCompatActivity {
    private EditText editReUser;
    private EditText editYzm;
    private EditText editRePwd;
    private Button buttonRe;
    private Button button_getVerify;

    private ContentResolver contentResolver;
    private Uri uri;

    private List<Map<String ,Object>> dataList = new ArrayList<>();
    private List<String> list = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        sql();
        initView();
    }

    private void sql() {
        uri = Uri.parse("content://com.pan.sql2");
        contentResolver = getContentResolver();
    }

    private void initView() {
        editReUser = (EditText) findViewById(R.id.edit_re_user);
        editYzm = (EditText) findViewById(R.id.edit_yzm);
        editRePwd = (EditText) findViewById(R.id.edit_re_pwd);
        buttonRe = (Button) findViewById(R.id.button_re);
        button_getVerify = findViewById(R.id.button_getVerify);

        register();
        getVerify();


    }

    private void getVerify() {
        button_getVerify.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String yzm = editYzm.getText().toString();
                if (yzm.equals("") || yzm == null) {
                    Toast.makeText(RegisterActivity.this, "手机号不能为空！", Toast.LENGTH_SHORT).show();
                    return;
                }

                    String s = "";
                    Cursor cursor = contentResolver.query(uri, null, null, null, null);
                    if (cursor != null) {
                        cursor.moveToFirst();
                        s = cursor.getString(cursor.getColumnIndex("name"));
                    }
                    Intent intent = new Intent();
                    intent.setAction("com.pan.test");
                    Bundle bundle = new Bundle();
                    bundle.putString("yzm", s);
                    intent.putExtras(bundle);
                    Toast.makeText(RegisterActivity.this, "" + s, Toast.LENGTH_SHORT).show();
                    sendBroadcast(intent);

            }
        });


    }

    private void register() {
        buttonRe.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String user = editReUser.getText().toString();
                String pwd = editRePwd.getText().toString();

                String edit = editYzm.getText().toString();
                if(edit.equals("") || edit == null){
                    return;
                }
                String rules = "^[A-Za-z0-9]{6,16}$";
                boolean matches = Pattern.matches(rules, user);
                boolean matches1 = Pattern.matches(rules, pwd);
                if(matches != matches1){
                    Toast.makeText(RegisterActivity.this, "用户名或密码长度不正确", Toast.LENGTH_SHORT).show();
                    return;
                }

                Cursor cursor = contentResolver.query(uri, null, null, null, null, null);
                if(cursor != null){
                    while(cursor.moveToNext()){
                        String users = cursor.getString(cursor.getColumnIndex("name"));
                        String tel = cursor.getString(cursor.getColumnIndex("tel"));

//                        Map<String,Object> map = new HashMap<>();
//                        map.put("user",user);
//                        map.put("tel",tel);
//                        dataList.add(map);

                        list.add(users+"-"+tel);

                    }
                }



                if(list.toString().contains(user)){

                    Toast.makeText(RegisterActivity.this, "已被注册！"+list.toString(), Toast.LENGTH_SHORT).show();

                }else {

                    ContentValues values = new ContentValues();
                    values.put("name", user);
                    values.put("tel", pwd);
                    contentResolver.insert(uri, values);
                    Toast.makeText(RegisterActivity.this, "注册成功!\n" + dataList.toString(), Toast.LENGTH_SHORT).show();
                    dataList.clear();
                    finish();

                }
            }
        });
    }
}

验证码的广播接收者

package com.example.day11_homework;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.Toast;

import com.example.day11_homework.sql.MyContentProvider;
import com.example.day11_homework.sql.MySqlHelper;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;

public class RegisterActivity extends AppCompatActivity {
    private EditText editReUser;
    private EditText editYzm;
    private EditText editRePwd;
    private Button buttonRe;
    private Button button_getVerify;

    private ContentResolver contentResolver;
    private Uri uri;

    private List<Map<String ,Object>> dataList = new ArrayList<>();
    private List<String> list = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        sql();
        initView();
    }

    private void sql() {
        uri = Uri.parse("content://com.pan.sql2");
        contentResolver = getContentResolver();
    }

    private void initView() {
        editReUser = (EditText) findViewById(R.id.edit_re_user);
        editYzm = (EditText) findViewById(R.id.edit_yzm);
        editRePwd = (EditText) findViewById(R.id.edit_re_pwd);
        buttonRe = (Button) findViewById(R.id.button_re);
        button_getVerify = findViewById(R.id.button_getVerify);

        register();
        getVerify();


    }

    private void getVerify() {
        button_getVerify.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String yzm = editYzm.getText().toString();
                if (yzm.equals("") || yzm == null) {
                    Toast.makeText(RegisterActivity.this, "手机号不能为空！", Toast.LENGTH_SHORT).show();
                    return;
                }

                    String s = "";
                    Cursor cursor = contentResolver.query(uri, null, null, null, null);
                    if (cursor != null) {
                        cursor.moveToFirst();
                        s = cursor.getString(cursor.getColumnIndex("name"));
                    }
                    Intent intent = new Intent();
                    intent.setAction("com.pan.test");
                    Bundle bundle = new Bundle();
                    bundle.putString("yzm", s);
                    intent.putExtras(bundle);
                    Toast.makeText(RegisterActivity.this, "" + s, Toast.LENGTH_SHORT).show();
                    sendBroadcast(intent);

            }
        });


    }

    private void register() {
        buttonRe.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String user = editReUser.getText().toString();
                String pwd = editRePwd.getText().toString();

                String edit = editYzm.getText().toString();
                if(edit.equals("") || edit == null){
                    return;
                }
                String rules = "^[A-Za-z0-9]{6,16}$";
                boolean matches = Pattern.matches(rules, user);
                boolean matches1 = Pattern.matches(rules, pwd);
                if(matches != matches1){
                    Toast.makeText(RegisterActivity.this, "用户名或密码长度不正确", Toast.LENGTH_SHORT).show();
                    return;
                }

                Cursor cursor = contentResolver.query(uri, null, null, null, null, null);
                if(cursor != null){
                    while(cursor.moveToNext()){
                        String users = cursor.getString(cursor.getColumnIndex("name"));
                        String tel = cursor.getString(cursor.getColumnIndex("tel"));

//                        Map<String,Object> map = new HashMap<>();
//                        map.put("user",user);
//                        map.put("tel",tel);
//                        dataList.add(map);

                        list.add(users+"-"+tel);

                    }
                }



                if(list.toString().contains(user)){

                    Toast.makeText(RegisterActivity.this, "已被注册！"+list.toString(), Toast.LENGTH_SHORT).show();

                }else {

                    ContentValues values = new ContentValues();
                    values.put("name", user);
                    values.put("tel", pwd);
                    contentResolver.insert(uri, values);
                    Toast.makeText(RegisterActivity.this, "注册成功!\n" + dataList.toString(), Toast.LENGTH_SHORT).show();
                    dataList.clear();
                    finish();

                }
            }
        });
    }
}