无法从android_资源加载url，返回空指针

我在fragment_main.xml中定义了一个webview。是否有在onCreateView中加载Url的示例代码？我的代码如下所示：

    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Log.i("Banana", "inside onCreate");

    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
            .add(R.id.container, new PlaceholderFragment()).commit();
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_main, container,
            false);
    // Find that webView1
    WebView mypointer = (WebView) rootView.findViewById(R.id.webView1);
    // Open asset/index.html
    if (mypointer != null) {
        mypointer.loadUrl("file://android_asset/index.html");
    } else {
        Log.v("Banana", "my pointer is null");
    }

    return rootView;
}

但是eclipse抱怨第二个覆盖，当我删除它时，它会运行，但不会显示url。指针返回null

my fragment_main.xml：

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="apps101.javabook.MainActivity$PlaceholderFragment" >
<WebView
    android:id="@+id/webView1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true" />

</RelativeLayout>

如何在应用程序中加载URL？谢谢

更新：我发现了问题。我试图复制onCreateView。删除了副本，现在似乎工作正常（是的，也忘记了斜杠）。问题解决了。谢谢。

用这个

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_main, container,
            false);
    // Find that webView1
    WebView mypointer = (WebView) rootView.findViewById(R.id.webView1);
    // Open asset/index.html
    if (mypointer != null) {
        mypointer.loadUrl("file:///android_asset/index.html");
    } else {
        Log.v("Banana", "my pointer is null");
    }

    return rootView;
}

---

您遗漏了一个“/”文件：///

使用此文件

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_main, container,
            false);
    // Find that webView1
    WebView mypointer = (WebView) rootView.findViewById(R.id.webView1);
    // Open asset/index.html
    if (mypointer != null) {
        mypointer.loadUrl("file:///android_asset/index.html");
    } else {
        Log.v("Banana", "my pointer is null");
    }

    return rootView;
}

---

您遗漏了一个“/”文件：///

使用此文件

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_main, container,
            false);
    // Find that webView1
    WebView mypointer = (WebView) rootView.findViewById(R.id.webView1);
    // Open asset/index.html
    if (mypointer != null) {
        mypointer.loadUrl("file:///android_asset/index.html");
    } else {
        Log.v("Banana", "my pointer is null");
    }

    return rootView;
}

---

您遗漏了一个“/”文件：///

使用此文件

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_main, container,
            false);
    // Find that webView1
    WebView mypointer = (WebView) rootView.findViewById(R.id.webView1);
    // Open asset/index.html
    if (mypointer != null) {
        mypointer.loadUrl("file:///android_asset/index.html");
    } else {
        Log.v("Banana", "my pointer is null");
    }

    return rootView;
}

---

您遗漏了一个“/”它是文件：//

查看后，您应该使用三个正斜杠（即

file:///etc...

）而不是两个。希望帮助在查看之后，您应该使用三个正斜杠（即

file:///etc...

）而不是两个。希望帮助在查看之后，您应该使用三个正斜杠（即

file:///etc...

）而不是两个。希望帮助在查看之后，您应该使用三个正斜杠（即

file:///etc...

）而不是两个。希望你已经错过了一个“/”的帮助file:///Mention 答案正文中缺少的正斜杠你漏掉了一个“/”它是file:///Mention 答案正文中缺少的正斜杠你漏掉了一个“/”它是file:///Mention 答案正文中缺少的正斜杠你漏掉了一个“/”它是file:///Mention 答案正文中缺少的正斜杠