Android之UI编程(一):线性布局

package com.example.fk_layout;

import android.app.Activity;
import android.os.Bundle;

public class LinearLayout extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.linear_layout);
    }
}

linear_layout.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:gravity="top|center_horizontal">

    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn1"
    />   

    <Button
        android:id="@+id/btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn2"
    />   

    <Button
        android:id="@+id/btn3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn3"
    />   

    <Button
        android:id="@+id/btn4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn4"
    />
</LinearLayout>

string.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">fk_layout</string>
    <string name="hello_world">Hello world!</string>
    <string name="btn1">测试按钮1</string>
    <string name="btn2">测试按钮2</string>
    <string name="btn3">测试按钮3</string>
    <string name="btn4">测试按钮4</string>

</resources>