予有类似的问题像在下面的链接。！

I have similar problem like the one in the link below.!

passing链接和标题给android的一个web视图

我有这样的code。在MainActivity：

I have a code like this in the MainActivity:

ListView lv;
Arrayadapter<String>aa;
String items[]={"item1","item2"};

@Override
protected void onCreate(Bundle Savedinstancestate){
super.onCreate(Savedinstancestate);
lv=(ListView)findViewById(R.id.listView1);

aa=new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_dropdown_item_1line,items) ;
lv.setAdapter(aa);

lv.setOnItemClickListener(new AdapterView.OnItemClickListener(){

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id){
Intent newActivity0 = new Intent(MainActivity.this, Mywebpage.class);
    newActivity0.putExtra("title", str[position]);
    switch (position) {
        case 0:
            newActivity0.putExtra("url", "http://www.google.com");
            break;
        case 1:
            newActivity0.putExtra("url", "file:///android_asset/item1.html");
            break;
        case 2:
            newActivity0.putExtra("url", "file://android_asset/item2.html");
            break;
    }

和 MYPAGE 类得到的意图是像

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.webviewpage);

    Bundle extras = getIntent().getExtras();
    String title, url;

    if (extras != null) {
        title = extras.getString("title");
        url = extras.getString("url");

        WebView wbView = (WebView) findViewById(R.id.WebView);
        wbView.getSettings().setJavaScriptEnabled(true);
        wbView.loadUrl(url);

// WbView.setWebViewClient（新myWebViewClient（））;         }

//WbView.setWebViewClient(new myWebViewClient()); }

和曾尝试与和没有设置的WebView客户（我曾评论对端线，有相应的类）。

And have tried with and without setting webview clients(the line which I have commented towards end, with a corresponding class).

我正在运行空指针异常，当我尝试点击该项目。

I am getting Runtime NULLPOINTER Exception when I try to click on the item.

推荐答案

我找到答案的问题！我宣布web视图，确定它的onCreate方法之前，在我的第二个活动，这导致了这个问题！

I found the answer to the problem! I had declared Webview, identifying it before onCreate method in my Second Activity, which has resulted in this problem.!

在code，它提供了previously，为putExtra也（字符串名称，值）;

Also in the code, which had provided previously, as putExtra("stringname", "value");

所以，让群众演员后，在捆绑

And so, after getting extras, in Bundle

extras.getExtra（字符串名称）;

extras.getExtra("stringname");

就足够了，并previously搞砸了在那个地方！

is enough and had previously messed up in that place.!

猜测，任何额外的logcat的信息，将进一步解决用于至少一个的问题有帮助。！因为它已经相当一段时间，在这之后我能得到的logcat的信息，由于一些问题，我曾在自己的！但感谢帮忙！本来upvoted所有！ :-)

Guess, any additional logcat information would have helped further in resolving atleast one of the issues.! Since it had been quite sometime, after which I was able to get the logcat information due to a few issues, I worked on own.! But thanks for helping out.! Had upvoted all.! :-)