package com.example.orangesale_04; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import androidx.appcompat.app.AppCompatActivity; import com.example.orangesale_04.activity.RegisterActivity; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private Button registerButton, loginButton; private EditText usernameText, paswdEdit; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.user_login); init(); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.register: Intent intent = new Intent(MainActivity.this, RegisterActivity.class); startActivity(intent); break; case R.id.login: break; } } //界面组件初始化 private void init() { usernameText = findViewById(R.id.username); paswdEdit = findViewById(R.id.password); loginButton = findViewById(R.id.login); loginButton.setOnClickListener(this); registerButton = findViewById(R.id.register); registerButton.setOnClickListener(this); } }