Add MainActivity

MainActivity

@@ -0,0 +1,56 @@
+package 项目包名;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+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 {
+    // 调用Actvity
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        // 关联activity.xml
+        setContentView(R.layout.activity_main);
+        // 关联用户名、密码和登录、注册按钮
+        EditText userName = (EditText) this.findViewById(R.id.UserNameEdit);
+        EditText passWord = (EditText) this.findViewById(R.id.PassWordEdit);
+        Button loginButton = (Button) this.findViewById(R.id.LoginButton);
+        Button signUpButton = (Button) this.findViewById(R.id.SignUpButton);
+        // 登录按钮监听器
+        loginButton.setOnClickListener(
+                new OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        // 获取用户名和密码
+                        String strUserName = userName.getText().toString().trim();
+                        String strPassWord = passWord.getText().toString().trim();
+                        // 判断如果用户名为"123456"密码为"123456"则登录成功
+                        if (strUserName.equals("123456") && strPassWord.equals("123456")) {
+                            Toast.makeText(MainActivity.this, "登录成功！", Toast.LENGTH_SHORT).show();
+                        } else {
+                            Toast.makeText(MainActivity.this, "请输入正确的用户名或密码！", Toast.LENGTH_SHORT).show();
+                        }
+                    }
+                }
+        );
+        // 注册按钮监听器
+        signUpButton.setOnClickListener(
+                new OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        // 跳转到注册界面
+                        Intent intent = new Intent(MainActivity.this, SignUpActivity.class);
+                        startActivity(intent);
+                    }
+                }
+        );
+
+    }
+}
+