在html中获得android手机中浏览器的屏幕宽度的方法：
1、在网页的<head>中增加以上这句话，可以让网页的宽度自动适应手机屏幕的宽度:
[html] view plaincopy
<meta name="viewport" content="width=device-width, initial-scale=10, minimum-scale=05, maximum-scale=20, user-scalable=yes" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="format-detection" content="telephone=no" />
第一行：
width=device-width ：表示宽度是设备屏幕的宽度
initial-scale=10：表示初始的缩放比例
minimum-scale=05：表示最小的缩放比例
maximum-scale=20：表示最大的缩放比例
user-scalable=yes：表示用户是否可以调整缩放比例
第二行：
设定iphone端页面全屏。
第三行：
取消数字被识别为电话号码。
2、如果是想要一打开网页，则自动以原始比例显示，并且不允许用户修改的话，则是：
[html] view plaincopy
<meta name="viewport" content="width=device-width, initial-scale=10, minimum-scale=10, maximum-scale=10, user-scalable=no" />
3、这样可以把一些页头横幅等的的宽度都设置成style="width:100%"，整个页面在设备上看起来就是全屏的了。
JQ行吗？
$(document)width(); 然后传到后台接收咯手册 ajax事件
这个是简单的例子：
JS:
<scritp>
$(function(){
var H = $(document)width();
$post("testphp",{h:H},function(data){
alert(data);
});
});
</script>
这里假设html和php是同目录
testphp<php
$h = $_POST['h']; //这个就是接收的参数
echo $h;die;
>
//具体的就不说明了，代码运行一次就明白了，访问html文件
The extensive Android SDK allows you to do many great things with particular views like the WebView for displaying webpages on Android powered devices
Android SDK 的扩展通过使用特定的view允许你做许多事情比如WebView用来在Android手机上展示网页
As of lately while I was experimenting with the Android SDK I was using a WebView in one of my activities
最近我在体验Android SDK的时候在一个Activity中用到了WebView
From that particular WebView I needed to know the ContentHeight but also the ContentWidth
从WebView我不但想要知道ContentHeight还想知道ContentWidth
Now getting the contentHeight is easy like so:
现在的情况是获取contentHeight很easy如下
webviewgetContentHeight();
Unfortunately getting the contentWidth from a WebView is rather more difficult since there is not a simple method like:
不幸的是从一个WebView获取contentWidth是相当困难因为SDK中没有一个像这样的方法
// THIS METHOD DOES NOT EXIST!
webviewgetContentWidth();
There are ways to get the contentWidth of the rendered HTML page and that is through Javascript If Javascript can get it for you then you can also have them in your Java code within your Android App
当然是有方法获取contentWidth的就是通过Javascript来获取如果你能够支持Javascript那么你就可以在你的Android 程序中使用java代码来获取宽度
By using a JavascriptInterface with your WebView you can let Javascript communicate with your Android App Java code by invoking methods on a registered object that you can embed using the JavascriptInterface
通过在你的WebView中使用JavascriptInterface通过调用你注册的JavascriptInterface方法可以让Javascript和你的Android程序的java代码相互连通
So how does this work
怎么做呢？
For a quick example I created a simple Activity displaying a webview that loads a webpage wich displays a log message and a Toast message with the contentWidth wich was determined using Javascript Note that this happens AFTER the page was finished loading because before the page is finished loading the width might not be fully rendered Also keep in mind that if there is content loaded asynchronously that it doesnt affect widths (most likely only heights will be affected as the width is almost always fully declared in CSS files unless you have a % width webpage)
搭建一个快速的例子创建一个简单的展示webView的Activity一个LogCat消息一个Toast消息用来显示我们通过 Javascript获取的宽度注意这些会在网页完全加载之后显示因为在网页加载完成之前宽度可能不能够正确的获取到同时也要注意到如果是异 步加载这并不影响宽度（最多高度会受影响因为宽度总是在CSS文件中做了完全的定义除非在网页中你用了%宽度）
Below is the code of the Activity Mainjava:
下面的代码是Activity的代码
package compimmosandroidsampleswebviewcontentwidth;
import androidappActivity;
import androidosBundle;
import androidutilLog;
import androidwebkitWebView;
import androidwebkitWebViewClient;
import androidwidgetToast;
publicclass Main extends Activity {
privatefinalstatic String LOG_TAG = "WebViewContentWidth";
privatefinal Activity activity = this;
privatestaticint webviewContentWidth = ;
privatestatic WebView webview;
/ Called when the activity is first created /
@Override
publicvoid onCreate(Bundle savedInstanceState) {
superonCreate(savedInstanceState);
setContentView(Rlayoutmain);
webview = (WebView) findViewById(Ridwebview);
webviewgetSettings()setJavaScriptEnabled(true);
webviewsetSaveEnabled(true);
webviewaddJavascriptInterface(new JavaScriptInterface() "HTMLOUT");
webviewsetWebViewClient(new WebViewClient() {
@Override
publicvoid onPageFinished(WebView view String url) {
webviewloadUrl("javascript:windowHTMLOUTgetContentWidth(documentgetElementsByTagName(html)[]scrollWidth);");
}
});
webviewloadUrl(";);
}
class JavaScriptInterface {
publicvoid getContentWidth(String value) {
if (value != null) {
webviewContentWidth = IntegerparseInt(value);
Logd(LOG_TAG "Result from javascript: " + webviewContentWidth);
ToastmakeText( activity
"ContentWidth of webpage is: " +
webviewContentWidth +
"px" ToastLENGTH_SHORT)show();
}
}
}
}
Below is the XML layout used with the Activity wich only contains a simple WebView:
下面是Activity的Layout主要就是一个简单的WebView
<xml version="" encoding="utf">
<LinearLayout
xmlns:android=";
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<WebView android:id="@+id/webview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
AndroidManifestxml layout:
AndroidManifestxml代码
<xml version="" encoding="utf">
<manifest
xmlns:android=";
package="compimmosandroidsampleswebviewcontentwidth"
android:versionCode="" android:versionName="">
<application android:icon="@drawable/icon"
android:label="@string/app_name">
<activity android:name="Main"
android:label="@string/app_name">
<intentfilter>
<action android:name="androidintentactionMAIN" />
<category
android:name="androidintentcategoryLAUNCHER" />
</intentfilter>
</activity>
</application>
<usessdk android:minSdkVersion="" />
<usespermission android:name="androidpermissionINTERNET" />
</manifest>
You can also download the full source of Android Application WebViewContentWidth!
The extensive Android SDK allows you to do many great things with particular views like the WebView for displaying webpages on Android powered devices
Android SDK 的扩展，通过使用特定的view，允许你做许多事情。比如，WebView，用来在Android手机上展示网页。
As of lately while I was experimenting with the Android SDK I was using a WebView in one of my activities
最近，我在体验Android SDK的时候，在一个Activity中用到了WebView。
From that particular WebView I needed to know the ContentHeight but also the ContentWidth
从WebView，我不但想要知道ContentHeight，还想知道ContentWidth。
Now getting the contentHeight is easy like so:
现在的情况是：获取contentHeight很easy，如下：
webviewgetContentHeight();
Unfortunately getting the contentWidth from a WebView is rather more difficult, since there is not a simple method like:
不幸的是，从一个WebView获取contentWidth是相当困难，因为SDK中没有一个像这样的方法：
// THIS METHOD DOES NOT EXIST!
webviewgetContentWidth();
There are ways to get the contentWidth of the rendered HTML page and that is through Javascript If Javascript can get it for you, then you can also have them in your Java code within your Android App
当然是有方法获取contentWidth的，就是通过Javascript来获取。如果你能够支持Javascript，那么你就可以在你的Android 程序中，使用java代码来获取宽度。
By using a JavascriptInterface with your WebView you can let Javascript communicate with your Android App Java code by invoking methods on a registered object that you can embed using the JavascriptInterface
通过在你的WebView中使用JavascriptInterface，通过调用你注册的JavascriptInterface方法，可以让Javascript和你的Android程序的java代码相互连通。
So how does this work
怎么做呢？
For a quick example I created a simple Activity displaying a webview that loads a webpage wich displays a log message and a Toast message with the contentWidth wich was determined using Javascript Note that this happens AFTER the page was finished loading, because before the page is finished loading the width might not be fully rendered Also keep in mind that if there is content loaded asynchronously that it doesn’t affect widths (most likely only heights will be affected as the width is almost always fully declared in CSS files unless you have a 100% width webpage)
搭建一个快速的例子：创建一个简单的展示webView的Activity，一个LogCat消息，一个Toast消息，用来显示我们通过Javascript获取的宽度。注意：这些会在网页完全加载之后显示，因为在网页加载完成之前，宽度可能不能够正确的获取到。同时也要注意到，如果是异步加载，这并不影响宽度（最多高度会受影响，因为宽度总是在CSS文件中做了完全的定义，除非在网页中你用了100%宽度。）。
Below is the code of the Activity Mainjava:
下面的代码是Activity的代码：
Mainjava
01 package compimmosandroidsampleswebviewcontentwidth;
02 import androidappActivity;
03 import androidosBundle;
04 import androidutilLog;
05 import androidwebkitWebView;
06 import androidwebkitWebViewClient;
07 import androidwidgetToast;
08 public class Main extends Activity {
09 private final static String LOG_TAG = "WebViewContentWidth";
10 private final Activity activity = this;
11 private static int webviewContentWidth = 0;
12 private static WebView webview;
13
14 / Called when the activity is first created /
15 @Override
16 public void onCreate(Bundle savedInstanceState) {
17 superonCreate(savedInstanceState);
18 setContentView(Rlayoutmain);
19 webview = (WebView) findViewById(Ridwebview);
20 webviewgetSettings()setJavaScriptEnabled(true);
21 webviewsetSaveEnabled(true);
22 webviewaddJavascriptInterface(new JavaScriptInterface(), "HTMLOUT");
23 webviewsetWebViewClient(new WebViewClient() {
24 @Override
25 public void onPageFinished(WebView view, String url) {
26 webviewloadUrl("javascript:windowHTMLOUTgetContentWidth(documentgetElementsByTagName(’html’)[0]scrollWidth);");
27 }//(">
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