在Android中的对话框中加载webview时,会使android.webkit.WebView.loadUrl无效吗? [英] Getting void android.webkit.WebView.loadUrl while loading webview in dialog in Android?
问题描述
我收到此错误导致:java.lang.NullPointerException:尝试在Android中的对话框中加载Webview时尝试调用虚拟方法void android.webkit.WebView.loadUrl。我附加了日志和代码和我以下使用。请务必提供您的知识解决。
I am getting this error Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.webkit.WebView.loadUrl when I try to load a webview inside a dialog in android.I have attached the log and code and I have used below. Kindly provide your knowledge to solve it.
02-06 18:07:41.605:E / AndroidRuntime(1492):java.lang。 RuntimeException:无法启动活动ComponentInfo {com.tanas.activities / com.tanas.activities.ContactInfoActivity}:java.lang.NullPointerException:尝试调用虚方法'void android.webkit.WebView.loadUrl(java.lang.String) 'on a null object reference
02-06 18:07:41.605:E / AndroidRuntime(1492):at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
02-06 18: 07:41.605:E / AndroidRuntime(1492):android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
02-06 18:07:41.605:E / AndroidRuntime(1492):android.app .ActivityThread.access $ 800(ActivityThread.java:144)
02-06 18:07:41.605:E / AndroidRuntime(1492):android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1278)
02-06 18:07:41.605:E / AndroidRuntime(1492):在android.os.Handler.di spatchMessage(Handler.java:102)
02-06 18:07:41.605:E / AndroidRuntime(1492):在android.os.Looper.loop(Looper.java:135)
02-06 18:07:41.605:E / AndroidRuntime(1492):android.app.ActivityThread.main(ActivityThread.java:5221)
02-06 18:07:41.605:E / AndroidRuntime(1492) .lang.reflect.Method.invoke(Native Method)
02-06 18:07:41.605:E / AndroidRuntime(1492):在java.lang.reflect.Method.invoke(Method.java:372)
02-06 18:07:41.605:E / AndroidRuntime(1492):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:899)
02-06 18:07 :41.605:E / AndroidRuntime(1492):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
02-06 18:07:41.605:E / AndroidRuntime(1492):Caused通过:java.lang.NullPointerException:尝试在空对象引用上调用虚函数void android.webkit.WebView.loadUrl(java.lang.String)
02-06 18:07:41.605:E / AndroidRuntime(1492):在com.tanas.act ivities.ContactInfoActivity.showCustomDialog(ContactInfoActivity.java:37)
02-06 18:07:41.605:E / AndroidRuntime(1492):at com.tanas.activities.ContactInfoActivity.onCreate(ContactInfoActivity.java:21)
02-06 18:07:41.605:E / AndroidRuntime(1492):android.app.Activity.performCreate(Activity.java:5933)
02-06 18:07:41.605:E / AndroidRuntime (1492):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
02-06 18:07:41.605:E / AndroidRuntime(1492):在android.app.ActivityThread.performLaunchActivity(ActivityThread。 java:2251)
02-06 18:07:41.605:E / AndroidRuntime(1492):...另外10个
02-06 18:07:41.605: E/AndroidRuntime(1492): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.tanas.activities/com.tanas.activities.ContactInfoActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.webkit.WebView.loadUrl(java.lang.String)' on a null object reference 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298) 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.app.ActivityThread.access$800(ActivityThread.java:144) 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.os.Handler.dispatchMessage(Handler.java:102) 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.os.Looper.loop(Looper.java:135) 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.app.ActivityThread.main(ActivityThread.java:5221) 02-06 18:07:41.605: E/AndroidRuntime(1492): at java.lang.reflect.Method.invoke(Native Method) 02-06 18:07:41.605: E/AndroidRuntime(1492): at java.lang.reflect.Method.invoke(Method.java:372) 02-06 18:07:41.605: E/AndroidRuntime(1492): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 02-06 18:07:41.605: E/AndroidRuntime(1492): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 02-06 18:07:41.605: E/AndroidRuntime(1492): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.webkit.WebView.loadUrl(java.lang.String)' on a null object reference 02-06 18:07:41.605: E/AndroidRuntime(1492): at com.tanas.activities.ContactInfoActivity.showCustomDialog(ContactInfoActivity.java:37) 02-06 18:07:41.605: E/AndroidRuntime(1492): at com.tanas.activities.ContactInfoActivity.onCreate(ContactInfoActivity.java:21) 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.app.Activity.performCreate(Activity.java:5933) 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) 02-06 18:07:41.605: E/AndroidRuntime(1492): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) 02-06 18:07:41.605: E/AndroidRuntime(1492): ... 10 more
代码是
m_dialog = new Dialog(ContactInfoActivity.this, R.style.Dialog_No_Border);
m_dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
LayoutInflater m_inflater = LayoutInflater.from(ContactInfoActivity.this);
View m_view = m_inflater.inflate(R.layout.activity_contact, null);
m_llMain = (LinearLayout) m_view.findViewById(R.id.cadllMain);
m_llMain.setBackgroundResource(R.drawable.btn_style_roundcorner);
WebView wv = (WebView) m_dialog.findViewById(R.id.webview1);
//WebView wv = new WebView(this);
wv.loadUrl("http:\\www.google.com");
wv.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
m_dialog.setContentView(m_view);
m_dialog.show();
推荐答案
m_dialog
没有一个 R.id.webview1
小部件,显然。
m_dialog
does not have a R.id.webview1
widget, apparently.
如果 R.id.webview1
在 R.layout.activity_contact
中,调用 findViewById()
在 m_llMain
,而不是 m_dialog
。
If R.id.webview1
is in R.layout.activity_contact
, call findViewById()
on m_llMain
, not m_dialog
.
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