SharedPreference、Zxing二维码

最新推荐文章于 2019-07-18 17:45:47 发布

原创最新推荐文章于 2019-07-18 17:45:47 发布 · 189 阅读

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本文介绍了一个基于Android的登录界面实现，包括用户输入验证、记住密码功能及使用SharedPreferences进行数据存储。同时，主界面通过网络请求获取数据并展示在GridView中，涉及Gson解析和异步线程处理。

代码不完整，稍后待续登录
用到sp

package com.qh.***.***20181112;

import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.Toast;

public class LoginActivity extends AppCompatActivity {

    private EditText txtNname;
    private EditText txtPwd;
    private CheckBox c_box;
    private Button btnLogin;
    private SharedPreferences sp;


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


        //初始化控件
        txtNname = findViewById(R.id.txt_name);
        txtPwd = findViewById(R.id.txt_pwd);
        c_box = findViewById(R.id.c_box);
        btnLogin = findViewById(R.id.login);

        //登录点击事件
        btnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String username = txtNname.getText().toString().trim();
                String password = txtPwd.getText().toString().trim();

                if (username.equals("Baway") && password.equals("123")) {
                    Toast.makeText(LoginActivity.this, "登录成功", Toast.LENGTH_SHORT).show();
                    //登录成功  记住密码
                    if (c_box.isChecked()) {

                        SharedPreferences.Editor edit = sp.edit();
                        edit.putString("u_name", username);
                        edit.putString("p_wd", password);
                        edit.commit();

                    }

                    Intent intent = new Intent(LoginActivity.this, MainActivity.class);
                    startActivity(intent);
                } else if (username != "Baway" || password != "123") {
                    Toast.makeText(LoginActivity.this, "输入有误", Toast.LENGTH_SHORT).show();

                } else {
                    Toast.makeText(LoginActivity.this, "输入不能为空", Toast.LENGTH_SHORT).show();
                }
            }
        });

        //记住密码操作
        jzCode();


    }

    //记住密码操作
    private void jzCode() {
        sp = getSharedPreferences("cofig", MODE_PRIVATE);
        //未选中
        if (sp.getBoolean("isChecked", false)) {
            //默认选中
            c_box.setChecked(true);
            txtNname.setText(sp.getString("u_name", ""));
            txtPwd.setText(sp.getString("p_wd", ""));

        }

        //记住密码监听事件
        c_box.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (c_box.isChecked()) {
                    sp.edit().putBoolean("isChecked", true).commit();
                } else {
                    sp.edit().putBoolean("isChecked", false).commit();
                }
            }
        });

    }


}

MainActivity

package com.qh.***.***20181112;

import android.content.Intent;
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.GridView;

import com.google.common.io.CharStreams;
import com.google.gson.Gson;
import com.qh.xuezhimin.xuezhimin20181112.adapter.GridViewAdapter;
import com.qh.xuezhimin.xuezhimin20181112.adapter.IconGridViewAdapter;
import com.qh.xuezhimin.xuezhimin20181112.bean.Bean;
import com.qh.xuezhimin.xuezhimin20181112.bean.Bean_icon;
import com.xys.libzxing.zxing.activity.CaptureActivity;

import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private GridView mGridView;
    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what == 0) {
                String data = (String) msg.obj;
                Gson gson = new Gson();
                Bean bean = gson.fromJson(data, Bean.class);
                list = bean.getData();
                GridViewAdapter adapter = new GridViewAdapter(MainActivity.this, list);
                mGridView.setAdapter(adapter);

            }

        }
    };

    private Handler handler1 = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what == 0) {
                String data = (String) msg.obj;
                Gson gson = new Gson();
                Bean_icon bean_icon = gson.fromJson(data, Bean_icon.class);
                list1 = bean_icon.getData();
                IconGridViewAdapter adapter = new IconGridViewAdapter(MainActivity.this, list1);
                iconGridView.setAdapter(adapter);
            }
        }
    };

    private List<Bean.DataBean> list;
    private GridView iconGridView;
    private List<Bean_icon.DataBean> list1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mGridView = findViewById(R.id.grid_view);
        iconGridView = findViewById(R.id.icon_gridView);

        new Thread() {
            @Override
            public void run() {
                super.run();
                try {
                    URL url = new URL("http://www.zhaoapi.cn/product/getCatagory");
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setConnectTimeout(5000);
                    connection.connect();
                    if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                        String data = CharStreams.toString(new InputStreamReader(connection.getInputStream(), "UTF_8"));
                        Message message = Message.obtain();
                        message.obj = data;
                        handler1.sendMessage(message);
                    }

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }.start();


        new Thread() {
            @Override
            public void run() {
                super.run();
                try {
                    URL url = new URL("http://www.wanandroid.com/tools/mockapi/6523/restaurants_offset_0_limit_4");
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod("GET");
                    connection.setConnectTimeout(5000);
                    connection.connect();
                    if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                        String data = CharStreams.toString(new InputStreamReader(connection.getInputStream(), "UTF_8"));
                        Message message = Message.obtain();
                        message.obj = data;
                        handler.sendMessage(message);

                    }

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }.start();
        findViewById(R.id.scanner).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivityForResult(new Intent(MainActivity.this,CaptureActivity.class),0);
            }
        });
    }


}

未完待续。。。。。