Android程序账号密码设置

在注册界面对账号密码经行注册，注册成功后进入到下一个登录界面，输入刚才注册的账号和密码进入下一个主界面，如果忘记刚才注册的密码键注册则回到上一个注册界面重新注册:

布局界面没有上传，只上传了代码实现的功能，需要完整文件可以dd我！

MainActivity：Java文件对注册的账号和密码经行储存

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()方法来获取一个SharedPreferences.Editor对象
                editor.putString("name", account.getText().toString());//保存获取编辑栏上的内容植入键name里并将其放在editor中
                editor.putString("password", password.getText().toString());//
                editor.commit();//提交数据
                Toast.makeText(MainActivity.this,"注册成功  欢迎您成为党党流传用户",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，对登录界面输入的账号和密码经行校监，如果和注册信息一样则弹出一个协议对话框，点击同意则进入下一行界面，点击退出则关闭程序！

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，回到上一注册界面
                // 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方法都对应了SharedPreferences.Editor 中的一种put方法,
                // 读取一个布尔型数据则用 getBoolean()方法.
                // 这些get方法都接收两个参数,第一个参数是键,第二个参数是默认值,即当传入的键找不到对应的值时,返回这个歌默认值
                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("党党流传用户协议");
                    builder.setMessage("党党流传是宣扬中国共产党人物，事迹，红色景点及红色精神等积极向上的内容，用户必须遵守党党流传的要求规定，严禁用户" +
                            "将党党流传app里面的内容进行非法修改，以及商用，营造良好的社区氛围，希望你在党党流传能够培养良好的生活作风！");
                    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, "用户名或密码不对", Toast.LENGTH_LONG).show();
                }
            }
        });
    }


}

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