我正在嘗試重複使用跨視圖的網頁視圖。這是我正在做的一個樣本。選擇文本並單擊「Web Search」會使應用程序崩潰
有兩個活動,Main
和Secondary
。
在main的onResume()中,我創建了一個webview對象,並將其保存在我的應用程序上下文中。
WebView wv = new WebView(getApplicationContext());
wv.getSettings().setJavaScriptEnabled(true);
wv.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);
wv.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
Log.e("test", "onPageFinished");
((WebViewReuseApplication) getApplicationContext()).setCachedWebView(view);
}
});
wv.loadUrl("http://www.someurl.com/path/to/somewhere");
然後在Main
一個按鈕被按下,我帶他到活動Secondary
。在這裏,我從我的Application
對象中獲取已加載的webview並將其附加到ViewGroup
。
在Secondary
onCreate()
-
WebView cachedWebView = ((WebViewReuseApplication) getApplicationContext()).getCachedWebView();
((LinearLayout) findViewById(R.id.webview_holder)).addView(cachedWebView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
我所做的這一切都是因爲網頁視圖是Android的非常慢,我真的很想當談到Secondary
活動它被預裝。
雖然這工作得很好,但這是一個問題。當它處於次要活動狀態時,如果我長時間按住特定文本進行選擇,然後單擊Web搜索,我的應用程序就會崩潰。 有什麼辦法可以解決這個問題嗎?我真的想要這個預加載的東西,我出於同樣的原因,我無法用活動上下文初始化WebView。
更新 -
這裏的logcat的輸出我得到 -
10-11 18:41:09.318: E/AndroidRuntime(3359): FATAL EXCEPTION: main
10-11 18:41:09.318: E/AndroidRuntime(3359): android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.app.ContextImpl.startActivity(ContextImpl.java:922)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.content.ContextWrapper.startActivity(ContextWrapper.java:283)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.webkit.SelectActionModeCallback.onActionItemClicked(SelectActionModeCallback.java:139)
10-11 18:41:09.318: E/AndroidRuntime(3359): at com.android.internal.policy.impl.PhoneWindow$DecorView$ActionModeCallbackWrapper.onActionItemClicked(PhoneWindow.java:2651)
10-11 18:41:09.318: E/AndroidRuntime(3359): at com.android.internal.app.ActionBarImpl$ActionModeImpl.onMenuItemSelected(ActionBarImpl.java:757)
10-11 18:41:09.318: E/AndroidRuntime(3359): at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:735)
10-11 18:41:09.318: E/AndroidRuntime(3359): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:149)
10-11 18:41:09.318: E/AndroidRuntime(3359): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:874)
10-11 18:41:09.318: E/AndroidRuntime(3359): at com.android.internal.view.menu.MenuPopupHelper.onItemClick(MenuPopupHelper.java:156)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.widget.AdapterView.performItemClick(AdapterView.java:292)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.widget.AbsListView.performItemClick(AbsListView.java:1182)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2710)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.widget.AbsListView$1.run(AbsListView.java:3465)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.os.Handler.handleCallback(Handler.java:605)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.os.Handler.dispatchMessage(Handler.java:92)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.os.Looper.loop(Looper.java:137)
10-11 18:41:09.318: E/AndroidRuntime(3359): at android.app.ActivityThread.main(ActivityThread.java:4511)
10-11 18:41:09.318: E/AndroidRuntime(3359): at java.lang.reflect.Method.invokeNative(Native Method)
10-11 18:41:09.318: E/AndroidRuntime(3359): at java.lang.reflect.Method.invoke(Method.java:511)
10-11 18:41:09.318: E/AndroidRuntime(3359): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:986)
10-11 18:41:09.318: E/AndroidRuntime(3359): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:753)
10-11 18:41:09.318: E/AndroidRuntime(3359): at dalvik.system.NativeStart.main(Native Method)
你的異常細節在哪裏? logcat? –
已添加。這對JellyBean來說非常好。這是Android中的錯誤嗎? – Enigma
你可以在你使用startActivity()的地方添加代碼嗎? –