Android java.lang.NullPointer异常错误单击webview中的后退按钮

我有这个问题：java.lang.NullPointerException

我的代码和LogCat图片：

WebviewActivity.class

public class WebviewActivity extends Activity{

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_webview);



    Bundle alinan = getIntent().getExtras();
    String alinmis = alinan.getString("veri");



    WebView webView = (WebView) findViewById(R.id.webView1);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.loadUrl(alinmis);
    webView.getSettings().setBuiltInZoomControls(true);     
    webView.setWebChromeClient(new WebChromeClient() {
    });

public class MenutrActivity extends Activity{

Bundle bnd;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_menutr);

    bnd = new Bundle();
    Button mekanlar = (Button)findViewById(R.id.mekanlar);
    final Intent i = new Intent(getApplicationContext(), WebviewActivity.class);

    mekanlar.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            startActivity(new Intent("android.intent.action.WEBK"));
            String myString = "http://www.google.com.tr";
            bnd.putString("veri", myString);
            i.putExtras(bnd);
            startActivity(i);
        }
    });  }}

menutractive.class

public class WebviewActivity extends Activity{

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_webview);



    Bundle alinan = getIntent().getExtras();
    String alinmis = alinan.getString("veri");



    WebView webView = (WebView) findViewById(R.id.webView1);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.loadUrl(alinmis);
    webView.getSettings().setBuiltInZoomControls(true);     
    webView.setWebChromeClient(new WebChromeClient() {
    });

public class MenutrActivity extends Activity{

Bundle bnd;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_menutr);

    bnd = new Bundle();
    Button mekanlar = (Button)findViewById(R.id.mekanlar);
    final Intent i = new Intent(getApplicationContext(), WebviewActivity.class);

    mekanlar.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            startActivity(new Intent("android.intent.action.WEBK"));
            String myString = "http://www.google.com.tr";
            bnd.putString("veri", myString);
            i.putExtras(bnd);
            startActivity(i);
        }
    });  }}

当我按下按钮时，应用程序失败

LogCat错误：WebviewActivity.class中的java.lang.NullPointerException

首先将“StartActivity（new Intent….）”更改为“Intent i=new Intent（…”。在放入额外的

---

下次只需复制您的代码并粘贴为代码。这样很难看到…

发布代码，而不是图片OK，很抱歉我将编辑您的主要活动XMLI已更改，但仍然没有。这应该会有所帮助。