我有一個類從dialogfragment繼承:打開對話框片段中的活動是否會取消對話框片段?
import org.xwalk.core.*;
// ...
public class WebViewDialogFragment extends DialogFragment {
private XWalkView webView;
public static final String LOG_TAG = "WebViewDialogFragment";
private String url;
private WebViewJavascriptInterface javaScriptInterface;
// The constructor I use to set the url.
public WebViewDialogFragment(String url, WebViewJavascriptInterface javascriptInterface) {
this.url = url;
}
public WebViewDialogFragment() {
Log.d(LOG_TAG, "WebViewDialogFragment empty constructor was called.");
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(LOG_TAG, "Setting fullscreen mode");
setStyle(DialogFragment.STYLE_NORMAL, R.style.SagoBizWebViewFullScreenTheme);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d(LOG_TAG, "Setting Xwalkview");
webView = new XWalkView(getActivity(), getActivity());
webView.clearCache(true);
Log.d(LOG_TAG, "Loading the url: " + url);
webView.load(url, null);
return webView;
}
@Override
public void onStart() {
super.onStart();
Dialog dialog = getDialog();
if (dialog != null) {
int width = ViewGroup.LayoutParams.MATCH_PARENT;
int height = ViewGroup.LayoutParams.MATCH_PARENT;
dialog.getWindow().setLayout(width, height);
}
}
@Override
public void onPause() {
super.onPause();
if (webView != null) {
webView.pauseTimers();
webView.onHide();
}
}
@Override
public void onResume() {
super.onResume();
if (webView != null) {
webView.resumeTimers();
webView.onShow();
}
}
@Override
public void onDestroy() {
super.onDestroy();
if (webView != null) {
webView.onDestroy();
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (webView != null) {
webView.onActivityResult(requestCode, resultCode, data);
}
}
}
我還有另一個階級誰擁有類型WebViewDialogFragment的成員:
public class WebView {
protected static final String DIALOG_FRAGMENT_TAG = "WebViewDialogFragment";
protected Activity activity;
protected String dialogFragmentTag = DIALOG_FRAGMENT_TAG;
protected WebViewDialogFragment webViewDialogFragment;
public WebView(Activity activity) {
this.activity = activity;
}
public void display(final String url) {
Log.d("TEST", "WebView display");
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
webViewDialogFragment = new WebViewDialogFragment(url, getWebViewJavascriptInterface());
if (webViewDialogFragment != null) {
FragmentManager fm;
fm = activity.getFragmentManager();
Log.d("TEST", "Showing webview");
webViewDialogFragment.show(fm, WebView.this.dialogFragmentTag);
} else {
Log.e("TEST", "webViewDialogFragment is null");
}
}
});
}
}
我所說的顯示器(字符串URL)的WebView的方法來顯示即將顯示webview的對話框。
使用@javascriptinterface屬性我創建了webview javascript和原生java之間的橋樑,以便我可以在dialogfragment中打開外部瀏覽器(或存儲)。 JavaScript的接口有像這樣的方法:
@JavascriptInterface
public void urlExternalAction(string url) {
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
webView.activity.startActivity(browserIntent);
}
的問題是,(從對話片段)打開外部活動,當你回到我的應用程序後(或者按後退按鈕或通過任務切換)應用程序崩潰:
AndroidRuntime了java.lang.RuntimeException:無法啓動活動ComponentInfo {com.myapp.Test/com.myapp.testActivity}:
android.app.Fragment $ InstantiationException:無法實例化片段com.myapp.Test.WebViewDialogFragment:確保cl屁股名稱存在,是公開的,有一個空的構造函數,它是公共
我通過添加一個空的構造函數來解決webviewdialogfragment崩潰,但是這不是我想要的。我想要一個保留其狀態的對話框片段。
你能幫我修改代碼來解決問題嗎?
請注意,父活動的onCreate不在我的控制之下,我不想修改它。
謝謝,我期待您的意見。讓我知道一個部分是否需要更好的解釋。