Android開發之改動螢幕方向
有的場景下。我們須要把手機螢幕方向改變,以下是我寫的一個樣例。
xml頁面檔案:
<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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft=
android:layout_alignParentTop="true"
android:text="改動螢幕方向" />
</RelativeLayout>
頁面java檔案: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)
{
//設定為豎屏
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 ? "橫向螢幕" : "縱向螢幕";
Toast.makeText(this, "系統螢幕方向發生改變\n改動後的方向為:" + screen , Toast.LENGTH_LONG).show();
}
}
MainFest xml檔案:<?
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>
個人辛勤勞動成果,如有轉載,請註明出處,謝謝。