setPluginState和setPluginsEnabled [英] setPluginState and setPluginsEnabled

问题描述

我的Andr​​oid应用程序最初是针对Android 2.2的起，所以我用

My Android app was first intended for Android 2.2 onwards so I used

player.getSettings().setPluginState(WebSettings.PluginState.ON);

有关web视图对象。

现在，我已经决定要打开我的应用程序到Android 2.1的用户，我改变了我的code这样：

Now that I've decided to open my app to Android 2.1 users, I changed my code to this:

try {
  player.getSettings().setPluginState(WebSettings.PluginState.ON);
} catch (Exception e) {
  player.getSettings().setPluginsEnabled(true);
}

有了这个，应用程序强制关闭，我得到我的logcat这个错误：

With this, the app force closes and I get this error on my logcat:

Uncaught handler: thread main exiting due to uncaught exception
java.lang.NoClassDefFoundError: android.webkit.WebSettings$PluginState
    at com.dokgu.joindota.WatchVOD.onCreate(WatchVOD.java:34)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
    at android.app.ActivityThread.access$2200(ActivityThread.java:119)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:123)
    at android.app.ActivityThread.main(ActivityThread.java:4363)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:521)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
    at dalvik.system.NativeStart.main(Native Method)

这个错误任何帮助吗？

Any help with this error?

编辑：
该错误只出现在2.1模拟器。

This error only appears on the 2.1 emulator.

推荐答案

一个有点晚了 - 我敢肯定你已经理解了它现在 - 但这个错误是由类 PluginState <所致/ code>不是适用于Android版本＆LT; 2.2（API 8）。请参见上PluginState android的文档。

A bit late - I'm sure you've figured it out by now - but the error is caused by the class PluginState not being available on Android versions < 2.2 (API 8). See the android docs on PluginState.

为什么你不能用抓住这个原因尝试{}赶上（例外五）{} 是因为的NoClassDefFoundError 不是 例外 - 这是一个 错误 。而错误和例外是的 的Throwable 他们是不一样的，因此你不能赶上一个错误与例外，反之亦然。

The reason why you can't catch this with try {} catch (Exception e) {} is because the NoClassDefFoundError is not an Exception - it's an Error. While Error and Exception are both children of Throwable they are not the same, hence you cannot catch an Error with an Exception and vice versa.

要解决这个问题，你可以采取以下任一方式：

To solve this you can take either of the following approaches:

1. 检查设备运行的Andr​​oid版本，并只调用设备运行API的版本时 PluginState > = 8。

在你的赶上（）语句来，抓的NoClassDefFoundError 而不是异常。

In your catch()-statement, catch NoClassDefFoundError instead of Exception.

此外，Eclipse将最有可能表现出皮棉警告提 PluginState 级仅在API可用8+。您可以隐藏/加忽略此警告 @燮pressLint（NewApi）您上面的方法就行了。

Also, Eclipse will most likely show a Lint-warning mentioning the PluginState-class is only available on API 8+. You can hide/ignore this warning by adding @SuppressLint("NewApi") to the line above your method.

这篇关于setPluginState和setPluginsEnabled的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！