Android程序账号密码设置

在注册界面中注册帐户密码。注册成功后，进入下一个登录界面。输入刚刚注册的帐户和密码以进入下一个主界面。如果您忘记了刚才注册的密码密钥，请返回上一个注册界面重新注册。:

布局界面不上传，只上传代码实现的功能，需要完整的文件。dd我！

MainActivity：Java该文件存储了注册的帐号和密码。

package com.example.china;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.nfc.Tag;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
    private Button button;

    private EditText account;
    private EditText password;
     String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.button);
        account = (EditText) findViewById(R.id.account);
        password = (EditText) findViewById(R.id.password);
        button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                SharedPreferences.Editor editor = getSharedPreferences("data", MODE_PRIVATE).edit();//调用SharedPreferences对象的edit()方法获取SharedPreferences.Editor对象
                editor.putString("name", account.getText().toString());//在编辑栏上保存获取内容植入密钥name把它放进去editor中
                editor.putString("password", password.getText().toString());//
                editor.commit();//提交数据
                Toast.makeText(MainActivity.this,"注册成功  欢迎成为派对传播用户",Toast.LENGTH_SHORT).show();
                Intent intent = new Intent(MainActivity.this, Main2Activity.class);//跳转activity_main.xml界面
                startActivity(intent);
            }
        });
    }

}

Main2Activity：Java文件、登录界面中输入的帐号和密码已校准，如果与注册信息相同，将弹出协议对话框，单击同意进入下一行界面，单击退出关闭程序！

package com.example.china;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;

public class Main2Activity extends Activity{
    private EditText accountEdit;
    private EditText passwordEdit;
    private Button login;
    private SharedPreferences pref;
    private SharedPreferences.Editor editor;
    private CheckBox rememberpass;
    private Button registe;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        accountEdit = (EditText) findViewById(R.id.account);
        passwordEdit = (EditText) findViewById(R.id.password);
        login = (Button) findViewById(R.id.login);
        rememberpass = (CheckBox) findViewById(R.id.remember_password);
        registe = (Button) findViewById(R.id.registe);
        registe.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {//点击注册返回上一个注册界面
                // TODO Auto-generated method stub
                Intent intent = new Intent(Main2Activity.this, MainActivity.class);
                startActivity(intent);
            }
        });

        pref = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());//获取 SharedPreferences 对象

        boolean isRemember = pref.getBoolean("remember_password", false);
        if(isRemember){
            String account = pref.getString("account", "");
            String password = pref.getString("password", "");
            accountEdit.setText(account);
            passwordEdit.setText(password);
            rememberpass.setChecked(true);
        }
        login.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                // TODO Auto-generated method stub
                String account = accountEdit.getText().toString();
                String password = passwordEdit.getText().toString();
                SharedPreferences pref = getSharedPreferences("data", MODE_PRIVATE);

                //.调用get方法,每种get方法相应。SharedPreferences.Editor 中的一种put方法,
                // 要读取布尔数据，请使用 getBoolean()方法.
                // 这些get方法接收两个参数,第一个参数是键,第二个参数是默认值,也就是说，当传入的键找不到相应的值时,将此歌曲返回到默认值
                if(account.equals(pref.getString("name", ""))&&password.equals(pref.getString("password", ""))){
                    editor = pref.edit();
                    if (rememberpass.isChecked()) {
                        editor.putBoolean("remember_password", true);
                    }
                    else{
                        editor.clear();
                    }
                    editor.commit();
                   /* Intent intent = new Intent(Main2Activity.this, Main3Activity.class);
                    startActivity(intent);*/
                    AlertDialog.Builder builder=new AlertDialog.Builder(Main2Activity.this);
                    builder.setTitle("第三方差价用户协议");
                    builder.setMessage("党的传播是宣传中国共产党的人物、事迹、红色景点和红色精神等积极内容，用户必须遵守党的传播要求，严禁用户" +
                            "扩大聚会范围app内容被非法修改和商业化使用，以营造良好的社区氛围。我希望你能在晚会上培养良好的生活方式！");
                    builder.setNegativeButton("退出", new DialogInterface.OnClickListener() {//
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            Intent intent = new Intent(Intent.ACTION_MAIN);
                            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                            intent.addCategory(Intent.CATEGORY_HOME);
                            startActivity(intent);
                            System.exit(0);
                        }
                    });
                    builder.setPositiveButton("同意", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            Intent intent = new Intent(Main2Activity.this, Main3Activity.class);
                    startActivity(intent);
                        }
                    });
                    builder.create().show();
                    //  finish();
                }
                else {
                    Toast.makeText(Main2Activity.this, "用户名或密码错误", Toast.LENGTH_LONG).show();
                }
            }
        });
    }

}

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