1. 解决WebView当中的UserAgent的问题
在android4.4+版本中,webview的使用发生了一些改变:
见文档:http://developer.android.com/intl/zh-cn/guide/webapps/migrating.html
我们的工程中要收集userAgent,在4.4之后就不能在主线程new webview了,因此使用文档中提供的方法:
If you need to retrieve the user agent but don't need to store it for your app or do not want to instantiateWebView
, you should use the static method, getDefaultUserAgent()
. However, if you intend to override the user agent string in your WebView
, you may instead want to use getUserAgentString()
.
代码如下:
- public static String getUserAgent(Context ctx) {
- //api 19 之前
- if(Build.VERSION.SDK_INT < 19){
- WebView webview = new WebView(ctx);
- WebSettings settings = webview.getSettings();
- return settings.getUserAgentString();
- }
- //api >=19
- return WebSettings.getDefaultUserAgent(ctx);
- }
2. 解决webView显示列表数据并分享到新浪 微信 朋友圈
分享接口是调用原生接口的:
/** * 分享 * * @param sns_Json 分享SnsShareEntity实体 --> json格式 */
@JavascriptInterface
public void shareGood(String sns_Json) {
Logger.e("分享 :"+sns_Json);
final SnsShareEntity snsShareEntity = GsonUtil.GetFromJson(sns_Json, SnsShareEntity.class);
if (snsShareEntity != null) {
//调用Umeng的分享接口
initShare();
ShareUtils.sendVideoShare(context, topBar, new GoodShareInterFace(mController, snsShareEntity, context, ""));
webView中直接调用shareGood方法,分享到微信 微信朋友圈、QQ都是没有问题,唯独分享到新浪微博的是报错:
根据提示和结合自己的项目分析:
webview调用shareGood方法,本身是属于webview里js调用,不属于UiThread;
当分享新浪微博的时候,新浪微博是打开一个网页登录界面的。所以需要运行在UiThread中,导致报错。
最后在*中搜索出一个解决方案:
java.lang.IllegalStateException: Calling View methods on another thread than the UI thread
runOnUiThread(new Runnable() {
@Override
public void run() {
// Code for WebView goes here
}
});
// This code is BAD and will block the UI thread
webView.loadUrl("javascript:fn()");
while(result == null) {
Thread.sleep(100);
}
所以最后我自己修改了shareGood方法,如下:
/** * 分享 * * @param sns_Json 分享SnsShareEntity实体 --> json格式 */
@JavascriptInterface
public void shareGood(String sns_Json) {
Logger.e("分享 :"+sns_Json);
final SnsShareEntity snsShareEntity = GsonUtil.GetFromJson(sns_Json, SnsShareEntity.class);
if (snsShareEntity != null) {
//解决Calling View methods on another thread than the UI thread.错误
// topBar.postDelayed(new Runnable() {
// @Override
// public void run() {
// // Code for WebView goes here
// initShare();
// ShareUtils.sendVideoShare(context, topBar, new GoodShareInterFace(mController, snsShareEntity, context, ""));
// }
// },1000);
//解决Calling View methods on another thread than the UI thread.错误
//http://*.com/questions/20255920/java-lang-illegalstateexception-calling-view-methods-on-another-thread-than-the
runOnUiThread(new Runnable() {
@Override
public void run() {
// Code for WebView goes here
initShare();
ShareUtils.sendVideoShare(context, topBar, new GoodShareInterFace(mController, snsShareEntity, context, ""));
}
});
}
}
这篇文章希望能够帮助大家,有任何问题,请随时留言,我会尽快回复大家,谢谢!