@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.v("LoginApp","输入用户姓名为:Toring");//日志记录,在控制台打印 LinearLayout linearLayout = new LinearLayout(this); linearLayout.setOrientation(1); //一行行显示 setContentView(linearLayout); TextView textView = new TextView(this); textView.setText("用户名:"); linearLayout.addView(textView); EditText editText = new EditText(this); linearLayout.addView(editText); TextView textView1 = new TextView(this); textView1.setText("密码:"); linearLayout.addView(textView1); EditText editText1 = new EditText(this); linearLayout.addView(editText1); Button button = new Button(this); button.setText("登陆"); linearLayout.addView(button); }