相信学过编程的人员都对各种语言的helloword程序的编写方式记忆犹新吧。在这里我们就为大家详细介绍一下有关Android HelloWord的编写方式,方便大家对这一操作系统编写方式的理解。#t#
先说说整个程序要做哪些内容吧,简单helloword 通过一个按钮点击在另一个acitvity出现文本Hello xiaoshengDAI
说下Android HelloWord做的步骤吧:
1.首先新建项目,我这边主要是测试Layout所以项目名就叫这个了。
2.我们要显示一个按钮,难后点击这个按钮就转到其他activity显示Hello xiaoshengDAI,新建类Layout主要来显示***个activity即button,
1).在main.xml文件中进行配置
Java代码
- < ?xml version="1.0" encoding="utf-8"?>
- < LinearLayout xmlns:android=
"http://schemas.android.com/apk/res/android"- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- < Button android:id="@+id/button1"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="来点我吧"/>
- < /LinearLayout>
- < ?xml version="1.0" encoding="utf-8"?>
- < LinearLayout xmlns:android=
"http://schemas.android.com/apk/res/android"- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- < Button android:id="@+id/button1"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="来点我吧"/>
- < /LinearLayout>
2).设置监听和跳转actiovity
Java代码
- package com.layout;
- 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;
- public class Layout extends Activity {
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- OnClickListener listener1 = null;
- Button botton1 = null;
- listener1 = new OnClickListener(){
- public void onClick(View v) {
- Intent intent0 = new Intent(Layout.this,
ActivityFrameLayout.class);- setTitle("FrameLayout");
- startActivity(intent0);
- }
- };
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- botton1 = (Button) findViewById(R.id.button1);
- botton1.setOnClickListener(listener1);
- }
- }
- package com.layout;
- 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;
- public class Layout extends Activity {
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- OnClickListener listener1 = null;
- Button botton1 = null;
- listener1 = new OnClickListener(){
- public void onClick(View v) {
- Intent intent0 = new Intent(Layout.this,
ActivityFrameLayout.class);- setTitle("FrameLayout");
- startActivity(intent0);
- }
- };
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- botton1 = (Button) findViewById(R.id.button1);
- botton1.setOnClickListener(listener1);
- }
- }
3.在Android HelloWord编写中,新建activityFrameLayout类和activityFrameLayout.xml文件
Java代码
- < ?xml version="1.0" encoding="utf-8"?>
- < LinearLayout xmlns:android=
"http://schemas.android.com/apk/res/android"- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- < TextView
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="Hello xiaoshengDAI"
- />
- < /LinearLayout>
- < ?xml version="1.0" encoding="utf-8"?>
- < LinearLayout xmlns:android=
"http://schemas.android.com/apk/res/android"- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- < TextView
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="Hello xiaoshengDAI"
- />
- < /LinearLayout>
Java代码
- package com.layout;
- import android.app.Activity;
- import android.os.Bundle;
- public class ActivityFrameLayout extends Activity {
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setTitle("哈哈");
- setContentView(R.layout.activityframelayout);
- }
- }
- package com.layout;
- import android.app.Activity;
- import android.os.Bundle;
- public class ActivityFrameLayout extends Activity {
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setTitle("哈哈");
- setContentView(R.layout.activityframelayout);
- }
- }
4.对AndroidManifest.xml进行配置,将新建Activity配置文件加进来
Android HelloWord的Java代码
- < ?xml version="1.0" encoding="utf-8"?>
- < manifest xmlns:android=
"http://schemas.android.com/apk/res/android"- package="com.layout"
- android:versionCode="1"
- android:versionName="1.0">
- < application android:icon="@drawable/icon"
android:label="@string/app_name">- < activity android:name=".Layout"
- android:label="@string/app_name">
- < intent-filter>
- < action android:name="android.intent.action.MAIN" />
- < category android:name=
"android.intent.category.LAUNCHER" />- < /intent-filter>
- < /activity>
- < activity android:name=".ActivityFrameLayout"
android:label="activityFrameLayout">- < intent-filter>
- < action android:name="android.intent.action.MAIN" />
- < category android:name=
"android.intent.category.LAUNCHER" />- < /intent-filter>
- < /activity>
- < /application>
- < uses-sdk android:minSdkVersion="3" />
- < /manifest>
- < ?xml version="1.0" encoding="utf-8"?>
- < manifest xmlns:android=
"http://schemas.android.com/apk/res/android"- package="com.layout"
- android:versionCode="1"
- android:versionName="1.0">
- < application android:icon="@drawable/icon"
android:label="@string/app_name">- < activity android:name=".Layout"
- android:label="@string/app_name">
- < intent-filter>
- < action android:name="android.intent.action.MAIN" />
- < category android:name=
"android.intent.category.LAUNCHER" />- < /intent-filter>
- < /activity>
- < activity android:name=".ActivityFrameLayout"
android:label="activityFrameLayout">- < intent-filter>
- < action android:name="android.intent.action.MAIN" />
- < category android:name=
"android.intent.category.LAUNCHER" />- < /intent-filter>
- < /activity>
- < /application>
- < uses-sdk android:minSdkVersion="3" />
- < /manifest>
5.Android HelloWord可以运行了,嘿嘿