基于android studio编写简易用户登录界面

基于android studio编写简易用户登录界面

在首页填写用户名和密码 点击注册
之后依旧定位首页填写之前注册信息
如果匹配正确则调用avd中浏览器跳转到百度首页
否则出现对话框，提示退出或者重新登录

AndroidManifest.xml

MainActivity.java

package com.hhr.saveqq;

import androidx.appcompat.app.AppCompatActivity;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;

import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import java.util.concurrent.TimeUnit;

public class MainActivity extends AppCompatActivity {
private Button Bt_login;
private Button BT_signup;
private EditText Username;
private EditText Password;
static String username1;
static String password1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

    Bt_login=(Button)findViewById(R.id.login);
    BT_signup=(Button)findViewById(R.id.signup);
    Username=(EditText)findViewById(R.id.username);
    Password=(EditText)findViewById(R.id.password);

    Onclick onclick=new Onclick();
    Bt_login.setOnClickListener(onclick);
    BT_signup.setOnClickListener(onclick);

}
class Onclick implements View.OnClickListener{



    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.login:
                String username=Username.getText().toString();
                String password=Password.getText().toString();
                if(password.equals(password1)&&username.equals(username1))
                {
                    Intent intent = new Intent();
                    intent.setAction("android.intent.action.VIEW");
                    intent.setData(Uri.parse("https://www.baidu.com/"));
                    startActivity(intent);
                   /* Intent intent = new Intent(MainActivity.this, WebActivity.class);
                    startActivity(intent);
                    */
                }
                else {
                    AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                    builder.setTitle("warning")
                            .setMessage("您输入错误，请重新输入                您也有可能未注册")
                            .setPositiveButton("重新登录", new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                    Intent intent = new Intent(MainActivity.this, MainActivity.class);
                                    startActivity(intent);
                                }
                            }).setNegativeButton("退出", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            Toast.makeText(getApplicationContext(), "正在退出", Toast.LENGTH_LONG).show();
                        }
                    }).show();
                }
                break;
            case R.id.signup:
                BT_signup.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                         username1=Username.getText().toString();
                         password1=Password.getText().toString();
                        Toast.makeText(MainActivity.this,"注册成功",Toast.LENGTH_LONG).show();
                        Intent intent = new Intent(MainActivity.this, MainActivity.class);
                        startActivity(intent);
                    }
                });
                break;
        }
    }
}

}

activity_main.xml

效果图