這個問題不重複,我知道如何在項目中修複NPE,這個NPE發生在本機方法中
你可以看到我得到：
引起：java.lang.NullPointerException
在android.content.res.AssetManager.addAssetPathNative(本機方法)
我遇到了以下錯誤在Android 8.0.0中測試我的應用程式後,用于對WebView進行充氣.
FATAL EXCEPTION: main
Process: com.example.shpoorvatan.myapplication,PID: 17952
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.shpoorvatan.myapplication/com.example.shpoorvatan.myapplication.MainActivity}: android.view.InflateException: Binary XML file line #8: Binary XML file line #8: Error inflating class android.webkit.WebView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: android.view.InflateException: Binary XML file line #8: Binary XML file line #8: Error inflating class android.webkit.WebView
Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class android.webkit.WebView
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
at android.view.LayoutInflater.createView(LayoutInflater.java:647)
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:720)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:788)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:289)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at com.example.shpoorvatan.myapplication.MainActivity.onCreate(MainActivity.java:12)
at android.app.Activity.performCreate(Activity.java:6975)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: java.lang.NullPointerException
at android.content.res.AssetManager.addAssetPathNative(Native Method)
at android.content.res.AssetManager.addAssetPathInternal(AssetManager.java:689)
at android.content.res.AssetManager.addAssetPathAsSharedLibrary(AssetManager.java:684)
at android.webkit.WebViewFactory.getProviderClass(WebViewFactory.java:407)
at android.webkit.WebViewFactory.getProvider(WebViewFactory.java:211)
at android.webkit.WebView.getFactory(WebView.java:2467)
at android.webkit.WebView.ensureProviderCreated(WebView.java:2462)
at android.webkit.WebView.setOverScrollMode(WebView.java:2527)
at android.view.View.(View.java:4536)
at android.view.View.(View.java:4668)
at android.view.ViewGroup.(ViewGroup.java:597)
at android.widget.AbsoluteLayout.(AbsoluteLayout.java:55)
at android.webkit.WebView.(WebView.java:636)
at android.webkit.WebView.(WebView.java:581)
at android.webkit.WebView.(WebView.java:564)
at android.webkit.WebView.(WebView.java:551)
... 27 more
我建立了新的示例應用程式,在布局中隻有一個WebView,并且存在問題,是以這不是我的應用程式的問題.
我沒有找到解決此問題的任何方法.
提前緻謝
PS：這是我的布局檔案：
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.shpoorvatan.myapplication.MainActivity">
android:id="@+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
java類：
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
WebView webView = (WebView) findViewById(R.id.webView);
webView.loadUrl("https://www.google.com/");
}
}
清單檔案：
package="com.example.shpoorvatan.myapplication">
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
PS-2：此應用程式在其他Android版本中運作良好.
PS-3：你想要面對這個問題嗎？建立一個示例項目并在xml代碼中添加一個WebView,然後在android 8上運作
PS-4：相關問題但不相同：android-O : app crash with webview
回答：
正如我所見,所有使用webView的應用程式(甚至系統部分如法律資訊)在打開webView頁面後崩潰,更新webView問題後已經解決.