前几天在写一个项目时，要求在项目中嵌入一个WebView
本来很快就完成了，测试也没有问题。但发给新加坡时，他们测试都会出现文本框聚焦时，网页面会放大（他们用三星手机测试的）
网上查了好久参考他的方法加上去测试 http://www.cppblog.com/guojingjia2006/archive/2012/12/18/196429.html
下面我将原文copy过来
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今天弄了下android webview下的几个页面。原先以为android 4+把 webview的viewport属性忽略掉了。/**
* Called in response to a message from webkit telling us that the soft
* keyboard should be launched.
*/
private void displaySoftKeyboard(boolean isTextView) {
InputMethodManager imm = (InputMethodManager)
getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
// bring it back to the default level scale so that user can enter text
boolean zoom = mZoomManager.getScale() < mZoomManager.getDefaultScale();
if (zoom) {
mZoomManager.setZoomCenter(mLastTouchX, mLastTouchY);
mZoomManager.setZoomScale(mZoomManager.getDefaultScale(), false);
}
if (isTextView) {
rebuildWebTextView();
if (inEditingMode()) {
imm.showSoftInput(mWebTextView, 0, mWebTextView.getResultReceiver());
if (zoom) {
didUpdateWebTextViewDimensions(INTERSECTS_SCREEN);
}
return;
}
}
// Used by plugins and contentEditable.
// Also used if the navigation cache is out of date, and
// does not recognize that a textfield is in focus. In that
// case, use WebView as the targeted view.
// see http://b/issue?id=2457459
imm.showSoftInput(this, 0);
}wv.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
// TODO Auto-generated method stub
try {
Field defaultScale = WebView.class
.getDeclaredField("mDefaultScale");
defaultScale.setAccessible(true);
float _s = defaultScale.getFloat(wv);
defaultScale.setFloat(wv, scale);
float x = wv.getScale();
int i = 0;
} catch (Exception e) {
e.printStackTrace();
try {
Field defaultZoom = WebView.class
.getDeclaredField("mZoomManager");
defaultZoom.setAccessible(true);
Field defaultScale = defaultZoom.getType()
.getDeclaredField("mDefaultScale");
defaultScale.setAccessible(true);
defaultScale.setFloat(defaultZoom.get(wv), scale);
} catch (Exception ee) {
ee.printStackTrace();
}
}
}
});as it showed, I using reflect to find the field 'mDefaultScale' to control the WebView. But it doesn't work on Android 4.1.1 (Google Nexus), and I catch an exception —— java.lang.NoSuchFieldException: mDefaultScale. Then I list the fileds and found the framework source seems being changed(I can only reach a field called 'mProvider'). So how can I fix the problem (I haven't got the source yet)? Thanks for reading my question with my poor English, Thx :) PS: maybe a online framework source review website is helpful but I can't found one, if you can provide me one, it will be great. :P
try {
Field defaultScale = WebView.class
.getDeclaredField("mDefaultScale");
defaultScale.setAccessible(true);
float sv = defaultScale.getFloat(authorizationView);
defaultScale.setFloat(authorizationView, xxx);
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
try {
Field zoomManager;
zoomManager = WebView.class.getDeclaredField("mZoomManager");
zoomManager.setAccessible(true);
Object zoomValue = zoomManager.get(authorizationView);
Field defaultScale = zoomManager.getType().getDeclaredField("mDefaultScale");
defaultScale.setAccessible(true);
float sv = defaultScale.getFloat(zoomValue);
defaultScale.setFloat(zoomValue, xxx);
} catch (SecurityException e1) {
e1.printStackTrace();
} catch (IllegalArgumentException e1) {
e.printStackTrace();
} catch (IllegalAccessException e1) {
e.printStackTrace();
} catch (NoSuchFieldException e1) {
e1.printStackTrace();
try {
Field mProviderField = WebView.class.getDeclaredField("mProvider");
mProviderField.setAccessible(true);
//mProviderField.getClass()
Object webviewclassic = mProviderField.get(authorizationView);
Field zoomManager = webviewclassic.getClass().getDeclaredField("mZoomManager");
zoomManager.setAccessible(true);
Object zoomValue = zoomManager.get(webviewclassic);
Field defaultScale = zoomManager.getType().getDeclaredField("mDefaultScale");
defaultScale.setAccessible(true);
float sv = defaultScale.getFloat(zoomValue);
defaultScale.setFloat(zoomValue, xxx);
}catch(Exception e2)
{
e2.printStackTrace();
}
}
}***************************************************************************************************************************
按大神的方法测试只有在三星手机找不到 mZoomManager 这个类 所以方法还是行不通
后来又找到TV端Android WebView 文本框获取焦点后自动放大的问题（代码我就只copy部分过来了）
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最后经过多次尝试最后找的解决办法就是：在webview.setWebChromeClient中重写onProgressChanged方法，加入view.requestFocus();就可以让文本框得到焦点后弹出键盘，同时页面也不会被放大；
针对TV端的 webview中的网页设定，可以参考一下代码
mWebView.setWebChromeClient(new WebChromeClient()
{
@Override
public void onProgressChanged(WebView view, int newProgress)
{
// TODO Auto-generated method stub
super.onProgressChanged(view, newProgress);
view.requestFocus();
}
});——————————————————————————————————————————————————————————————————————
我加到我的代码中，发现在手机中的确有效果，但发到新加坡，得到的回复，还是同样的问题！
到此，我表示我很伤心很伤心
想想，只能用js去处理了
正当我伤心写着demo时，我老大下班了，问我走不走。我就跟他讲了我的问题。他果断去开机去了，说试试他那边能不能改（我老大是写后台端的）
问题解决了，只加了以下两句代码---------------蛋蛋的优伤
<!-- 下面两句代码是做手机适配用的 ， 加上之后手机网页就会自动适配--> <meta name="viewport" content="width=device-width"> <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
哦，不好意思忘了上demo了
完美解决 Android WebView 文本框获取焦点后自动放大问题
原文地址：http://blog.csdn.net/aa1000777/article/details/45092803
