Go语言视频零基础入门到精通

jjweji

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。

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主要来显示第一个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"   

androidrientation="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>  
复制代码
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);  

}  

}
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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>  
复制代码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);  

}  

}
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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>  
复制代码5.Android HelloWord可以运行了