在Android Studio 编写应用程序,在模拟器中显示“我对Android很痴迷!”
题目:编写Android应用程序,在模拟器中显示“我对Android很痴迷!”
activity_main.xml 代码:
<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="我对Android很痴迷!" //这是在模拟器上会显示我对Android很痴迷! app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> </android.support.constraint.ConstraintLayout>
MainActitive.java 的代码
package com.jiancai.answer1_4; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //调用父类Actitive的onCreat() setContentView(R.layout.activity_main); //在屏幕上显示内容的方法 } }
显示截图: