如何从内置web浏览器而不是应用程序中的代码打开URL？
我试过了：
try {
Intent myIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(download_link));
startActivity(myIntent);
} catch (ActivityNotFoundException e) {
Toast.makeText(this, "No application can handle this request."
+ " Please install a webbrowser", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
但我有个例外：
No activity found to handle Intent{action=android.intent.action.VIEW data =www.google.com
当前回答
基本介绍：
https://正在“代码”中使用该代码，这样中间的任何人都无法读取它们。这样可以保护您的信息免受黑客攻击。
http://仅用于共享目的，不安全。
关于您的问题：XML设计：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
tools:context="com.example.sridhar.sharedpreferencesstackoverflow.MainActivity">
<LinearLayout
android:orientation="horizontal"
android:background="#228b22"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp">
<Button
android:id="@+id/normal_search"
android:text="secure Search"
android:onClick="secure"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<Button
android:id="@+id/secure_search"
android:text="Normal Search"
android:onClick="normal"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_weight="9"
android:id="@+id/button_container"
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="horizontal">
<WebView
android:id="@+id/webView1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</LinearLayout>
活动设计：
public class MainActivity extends Activity {
//securely open the browser
public String Url_secure="https://www.stackoverflow.com";
//normal purpouse
public String Url_normal="https://www.stackoverflow.com";
WebView webView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView=(WebView)findViewById(R.id.webView1);
}
public void secure(View view){
webView.setWebViewClient(new SecureSearch());
webView.getSettings().setLoadsImagesAutomatically(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
webView.loadUrl(Url_secure);
}
public void normal(View view){
webView.setWebViewClient(new NormalSearch());
webView.getSettings().setLoadsImagesAutomatically(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
webView.loadUrl(Url_normal);
}
public class SecureSearch extends WebViewClient{
@Override
public boolean shouldOverrideUrlLoading(WebView view, String Url_secure) {
view.loadUrl(Url_secure);
return true;
}
}
public class NormalSearch extends WebViewClient{
@Override
public boolean shouldOverrideUrlLoading(WebView view, String Url_normal) {
view.loadUrl(Url_normal);
return true;
}
}
}
Android Manifest.Xml权限：
<uses-permission android:name="android.permission.INTERNET"/>
您在执行此操作时面临问题：
获取清单权限url之间的多余空间检查您的url是否正确
其他回答
android.webkit.URLUtil自Api级别1（android 1.0）以来，guessUrl（String）方法工作得非常好（即使使用file://或data://）。用作：
String url = URLUtil.guessUrl(link);
// url.com -> http://url.com/ (adds http://)
// http://url -> http://url.com/ (adds .com)
// https://url -> https://url.com/ (adds .com)
// url -> http://www.url.com/ (adds http://www. and .com)
// http://www.url.com -> http://www.url.com/
// https://url.com -> https://url.com/
// file://dir/to/file -> file://dir/to/file
// data://dataline -> data://dataline
// content://test -> content://test
在“活动”调用中：
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(URLUtil.guessUrl(download_link)));
if (intent.resolveActivity(getPackageManager()) != null)
startActivity(intent);
有关详细信息，请查看完整的guessUrl代码。
实现这一点的常见方法是使用以下代码：
String url = "http://www.stackoverflow.com";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
可以更改为短代码版本。。。
Intent intent = new Intent(Intent.ACTION_VIEW).setData(Uri.parse("http://www.stackoverflow.com"));
startActivity(intent);
or :
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.stackoverflow.com"));
startActivity(intent);
最短！：
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.stackoverflow.com")));
只需使用简短的一个，即可在浏览器中打开您的Url：
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("YourUrlHere"));
startActivity(browserIntent);
在Android 11中打开URL链接的新的更好方法。
try {
val intent = Intent(ACTION_VIEW, Uri.parse(url)).apply {
// The URL should either launch directly in a non-browser app
// (if it’s the default), or in the disambiguation dialog
addCategory(CATEGORY_BROWSABLE)
flags = FLAG_ACTIVITY_NEW_TASK or FLAG_ACTIVITY_REQUIRE_NON_BROWSER or
FLAG_ACTIVITY_REQUIRE_DEFAULT
}
startActivity(intent)
} catch (e: ActivityNotFoundException) {
// Only browser apps are available, or a browser is the default app for this intent
// This code executes in one of the following cases:
// 1. Only browser apps can handle the intent.
// 2. The user has set a browser app as the default app.
// 3. The user hasn't set any app as the default for handling this URL.
openInCustomTabs(url)
}
参考文献：
https://medium.com/androiddevelopers/package-visibility-in-android-11-cc857f221cd9和https://developer.android.com/training/package-visibility/use-cases#avoid-a-消除歧义对话框
根据Mark B的回答和以下评论：
protected void launchUrl(String url) {
Uri uri = Uri.parse(url);
if (uri.getScheme() == null || uri.getScheme().isEmpty()) {
uri = Uri.parse("http://" + url);
}
Intent browserIntent = new Intent(Intent.ACTION_VIEW, uri);
if (browserIntent.resolveActivity(getPackageManager()) != null) {
startActivity(browserIntent);
}
}
