WebView中的Android open intent://协议
当我将URL加载到WebView并尝试打开链接时，其中一些会显示错误页面，如:
When i load url into WebView and try to open links, some of them shows an error page like:
net :: ERR_UNKNOWN_URL_SCHEME意向://maps.yandex.ru?utm_medium = tab ...
net::ERR_UNKNOWN_URL_SCHEME intent://maps.yandex.ru?utm_medium=tab...
如何打开此链接，或者至少检查是否已安装并运行适当的应用程序?
How can i open this links, or at least check whether appropriate app installed and run it?
我尝试通过实现自定义WebViewClient来覆盖url加载:
I've tried to override url loading by implementing custom WebViewClient:
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (!url.startsWith("http")) {
getActivity().startActivity(new Intent(Intent.ACTION_VIEW).setData(Uri.parse(url)));
return true;
}
return false;
}
但是在这种情况下，应用程序崩溃并带有ActivityNotFoundException.
but app crashes with ActivityNotFoundException in this case.
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=intent://maps.yandex.ru?utm_medium=tab-maps&text=магазин&utm_source=serp&yandexuid=2258091361456330110 }
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1798)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.app.Instrumentation.execStartActivity(Instrumentation.java:1512)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.app.Activity.startActivityForResult(Activity.java:3930)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.app.Activity.startActivityForResult(Activity.java:3890)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:784)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.app.Activity.startActivity(Activity.java:4213)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.app.Activity.startActivity(Activity.java:4181)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at ru.uxapps.voicesearch.FWeb$CustomWebViewClient.shouldOverrideUrlLoading(FWeb.java:70)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at com.android.webview.chromium.WebViewContentsClientAdapter.shouldOverrideUrlLoading(WebViewContentsClientAdapter.java:325)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at org.chromium.android_webview.AwContentsClientBridge.shouldOverrideUrlLoading(AwContentsClientBridge.java:266)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:37)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.os.Handler.dispatchMessage(Handler.java:102)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.os.Looper.loop(Looper.java:148)
02-24 20:58:51.886 31255-31255/ru.uxapps.voicesearch W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5417)
02-24 20:58:51.887 31255-31255/ru.uxapps.voicesearch W/System.err: at java.lang.reflect.Method.invoke(Native Method)
即使安装了必需的应用程序，应用程序也会崩溃.但是，如果在Chrome中打开此链接，则会显示maps.yandex.ru网站，或者如果已安装则打开应用程序.
App crashes even if required app is installed. But if open this link in Chrome, it shows maps.yandex.ru site, or opens app if installed.
是否有一个常见解决方案，该解决方案适用于所有intent://链接? 感谢您的建议.
Is there a common solution, which will work for all intent:// links? Thanks for your suggestions.
我找到了解决方案. 这个问题和
I found a solution. This question and this documentation helps me to understand situation.
结果，我编写了一个遵循以下逻辑的链接处理程序:
As a result, i've written a link handler which follow this logic:
- 在同一WebView中打开http和https
- 尝试处理已知方案(电话:等)
- 如果找不到已知活动，则解析intent:scheme并尝试运行适当的应用程序
- 如果未安装必需的应用，请尝试将提供的后备网址加载到当前的WebView中
- 如果未提供备用网址，请重定向至市场并要求安装所需的应用程序
代码是:
mWebView.setWebViewClient(new CustomWebViewClient());
//...
private class CustomWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView webView, String url) {
if (url.startsWith("http")) return false;//open web links as usual
//try to find browse activity to handle uri
Uri parsedUri = Uri.parse(url);
PackageManager packageManager = getActivity().getPackageManager();
Intent browseIntent = new Intent(Intent.ACTION_VIEW).setData(parsedUri);
if (browseIntent.resolveActivity(packageManager) != null) {
getActivity().startActivity(browseIntent);
return true;
}
//if not activity found, try to parse intent://
if (url.startsWith("intent:")) {
try {
Intent intent = Intent.parseUri(url, Intent.URI_INTENT_SCHEME);
if (intent.resolveActivity(getActivity().getPackageManager()) != null) {
getActivity().startActivity(intent);
return true;
}
//try to find fallback url
String fallbackUrl = intent.getStringExtra("browser_fallback_url");
if (fallbackUrl != null) {
webView.loadUrl(fallbackUrl);
return true;
}
//invite to install
Intent marketIntent = new Intent(Intent.ACTION_VIEW).setData(
Uri.parse("market://details?id=" + intent.getPackage()));
if (marketIntent.resolveActivity(packageManager) != null) {
getActivity().startActivity(marketIntent);
return true;
}
} catch (URISyntaxException e) {
//not an intent uri
}
}
return true;//do nothing in other cases
}
}
也许它需要进行一些清理，但这可能会有所帮助.如果您知道更简单的方法，请告诉我，我仍在寻找最佳解决方案.
Maybe it needs some cleanup, but it can be helpful. Please tell me if you know an easier way of doing this, i still looking for the best solution.