Question

我在fragment_main.xml中定义了webview。是否有任何示例代码可以在onCreateView中加载Url？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;
}

然而，eclipse抱怨第二次覆盖，当我删除它时，它会运行，但不显示网址。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>

如何在应用中加载网址？感谢。

更新：我发现了问题。我试图复制onCreateView。删除副本，现在它似乎工作正常（是的，也忘了斜线）。问题解决了。感谢。

Answer 1

使用此，

@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;
}

你错过了'/'文件：///

无法从android_asset加载url，返回null指针

1 个答案: