如何在android中的chrome自定义选项卡和webview之间切换？

Question

我在android studio中为网站实现了Chrome自定义选项卡和webview。他们都工作正常。现在我想要的是，如果用户没有安装chrome或chrome版本小于45（chrome自定义选项卡所需的最低版本），则打开webview类。如何检查铬版本或是否安装了铬？ Here is the code snipet to open chrome custom tab by default

Answer 1

你应该尝试绑定到服务，如果失败，那么你可以回退到web视图。你可以在这里看到：从https://github.com/GoogleChrome/custom-tabs-client/blob/master/demos/src/main/java/org/chromium/customtabsdemos/CustomTabActivityHelper.java采取https://github.com/GoogleChrome/custom-tabs-client/blob/cc6b8b9169ed7e70484bbdbbf39b672d1c4b3c80/Application/src/main/java/org/chromium/customtabsclient/MainActivity.java#L147

Answer 2

：

public void bindCustomTabsService(Activity activity) { 
    if (mClient != null) return; 

    String packageName = CustomTabsHelper.getPackageNameToUse(activity); 
    if (packageName == null) return; 

    mConnection = new ServiceConnection(this); 
    CustomTabsClient.bindCustomTabsService(activity, packageName, mConnection); 
} 

您可以检查是否“的packageName”为空

Answer 3

我用下面的代码为我自己的目的来检查Chrome版本与是否安装了铬。希望它会有所帮助，你应该尝试。

String chromePackageName = "com.android.chrome"; 
int chromeTargetVersion = 45; 

boolean isSupportCustomTab = false; 

try { 
    PackageManager pm = getApplicationContext().getPackageManager(); 
    List<PackageInfo> list = pm.getInstalledPackages(PackageManager.MATCH_DEFAULT_ONLY); 
    if (list != null && 0 < list.size()) { 
     for (PackageInfo info : list) { 
      if (chromePackageName.equals(info.packageName)) { 

       String chromeVersion = pm.getPackageInfo(chromePackageName, 0).versionName; 
       if(chromeVersion.contains(".")) { 
        chromeVersion = chromeVersion.substring(0, chromeVersion.indexOf('.')); 
       } 
       isSupportCustomTab = (Integer.valueOf(chromeVersion) >= chromeTargetVersion); 

       break; 
      } 
     } 
    } 
} catch (Exception ex) {} 

if (isSupportCustomTab) { 
    //Use Chrome Custom Tab 
} else { 
    //Use WebView 
}