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Android横竖屏幕切换小结

2019年07月24日  | 移动技术网IT编程  | 我要评论

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android手机或平板都会存在横竖屏切换的功能，通常是由物理重力感应触发的，但是有时候也不尽然，通常在设置里面我们可以对手机的横竖屏切换进行关闭。

androidmanifest.xml

<activity
android:name="com.google.android.gms.ads.adactivity"
android:configchanges="keyboard|keyboardhidden|orientation|screenlayout|uimode|screensize|smallestscreensize"
android:theme="@android:style/theme.translucent" />
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.yanlei.yl7" >
<!-- include required permissions for google mobile ads to run. -->
<uses-permission android:name="android.permission.internet" />
<uses-permission android:name="android.permission.access_network_state" />
<uses-permission android:name="android.permission.change_configuration"/>
<application
android:allowbackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/apptheme" >
<!-- this meta-data tag is required to use google play services. -->
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<activity
android:name=".mainactivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.main" />
<category android:name="android.intent.category.launcher" />
</intent-filter>
</activity> <!-- include the adactivity configchanges and theme. -->
<activity
android:name="com.google.android.gms.ads.adactivity"
android:configchanges="keyboard|keyboardhidden|orientation|screenlayout|uimode|screensize|smallestscreensize"
android:theme="@android:style/theme.translucent" />
</application>
</manifest>

activity_main.xml

<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"
>
<button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="获取configuration信息"
android:textsize="25sp"
android:layout_margintop="80dip"
android:layout_centerhorizontal="true"
/>
<textview
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="测试configurationchange"
android:textsize="25sp"
android:layout_centerinparent="true"
android:id="@+id/mytext" />
</relativelayout>

mainactivity.java

package com.example.yanlei.yl7;
import android.content.res.configuration;
import android.os.bundle;
import android.support.v7.app.appcompatactivity;
import android.view.menu;
import android.view.menuitem;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;
import android.widget.textview;
import android.widget.toast;
public class mainactivity extends appcompatactivity {
private button mbutton;
private textview ptextview;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
ptextview=(textview)this.findviewbyid(r.id.mytext);
system.out.println("---> oncreate()");
init();
}
private void init() {
mbutton = (button) findviewbyid(r.id.button);
mbutton.setonclicklistener(new clicklistenerimpl());
}
private class clicklistenerimpl implements onclicklistener {
@override
public void onclick(view v) {
getconfigurationinfo();
}
}
private void getconfigurationinfo() {
configuration configuration = getresources().getconfiguration();
//获取屏幕方向
int l = configuration.orientation_landscape;
int p = configuration.orientation_portrait;
if (configuration.orientation == l) {
ptextview.settext("现在是横屏====");
system.out.println("现在是横屏");
}
if (configuration.orientation == p) {
ptextview.settext("现在是竖屏===");
system.out.println("现在是竖屏");
}
}
@override
public void onconfigurationchanged(configuration newconfig) {
super.onconfigurationchanged(newconfig);
//newconfig.orientation获得当前屏幕状态是横向或者竖向
//configuration.orientation_portrait 表示竖向
//configuration.orientation_landscape 表示横屏
if(newconfig.orientation==configuration.orientation_portrait){
ptextview.settext("现在是竖屏");
toast.maketext(mainactivity.this, "现在是竖屏", toast.length_short).show();
}
if(newconfig.orientation==configuration.orientation_landscape){
ptextview.settext("现在是横屏");
toast.maketext(mainactivity.this, "现在是横屏", toast.length_short).show();
}
}

@override
protected void onsaveinstancestate(bundle outstate) {
super.onsaveinstancestate(outstate);
outstate.putstring("name", "zxx");
outstate.putint("id", 9527);
system.out.println("---> onsaveinstancestate()");
}
@override
protected void onrestoreinstancestate(bundle savedinstancestate) {
super.onrestoreinstancestate(savedinstancestate);
string name = savedinstancestate.getstring("name");
int id = savedinstancestate.getint("id");
system.out.println("---> onrestoreinstancestate()");
system.out.println("名字=" + name + ",编号=" + id);

}
@override
public boolean oncreateoptionsmenu(menu menu) {
// inflate the menu; this adds items to the action bar if it is present.
getmenuinflater().inflate(r.menu.menu_main, menu);
return true;
}
@override
public boolean onoptionsitemselected(menuitem item) {
// handle action bar item clicks here. the action bar will
// automatically handle clicks on the home/up button, so long
// as you specify a parent activity in androidmanifest.xml.
int id = item.getitemid();
if (id == r.id.action_settings) {
return true;
}
return super.onoptionsitemselected(item);
}
}

以上内容给大家介绍了android横竖屏切换小结的相关知识，希望对大家有所帮助！

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