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有的場景下。我們須要把手機屏幕方向改變，以下是我寫的一個樣例。

xml頁面文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom

="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

<Button

android:id="@+id/btn"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:text="改動屏幕方向" />

</RelativeLayout>

頁面java文件：

package com.example.chcfg;

import android.os.Bundle;

import

android.app.Activity;

import android.content.pm.ActivityInfo;

import android.content.res.Configuration;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Button btn = (Button)findViewById(R.id.btn);

btn.setOnClickListener(new OnClickListener()

{

public void onClick(View source) {

// TODO Auto-generated method stub

Configuration config = getResources().getConfiguration();

if(config.orientation == Configuration.ORIENTATION_LANDSCAPE)

{

//設置為豎屏

MainActivity.this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

}

//假設當前是豎屏

if(config.orientation == Configuration.ORIENTATION_PORTRAIT)

{

MainActivity.this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

}

}

});

}

@Override

public void onConfigurationChanged(Configuration newConfig) {

// TODO Auto-generated method stub

super.onConfigurationChanged(newConfig);

String screen = newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE ? "橫向屏幕" : "縱向屏幕";

Toast.makeText(this, "系統屏幕方向發生改變\n改動後的方向為：" + screen , Toast.LENGTH_LONG).show();

}

}

MainFest xml文件：

<?

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

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.example.chcfg"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="18" />

<uses-permission android:name="android.permission.CHANGE_CONFIGURATION"/>

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.example.chcfg.MainActivity"

android:label="@string/app_name"

android:configChanges="orientation">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

</application>

</manifest>

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Android開發之改動屏幕方向