我试图在我的片段中实现Phonegap CordovaWebView,但它不起作用。
我的布局如下所示(cordovawebview.xml):
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<org.apache.cordova.CordovaWebView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id = "@+id/mainView"/>
</FrameLayout>
在我的片段中onCreateView()
我尝试给布局增加气氛:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.cordovawebview, container); // <--- the error occurs here!
// CordovaWebView webView = (CordovaWebView)v.findViewById(R.id.mainView);
return v;
}
也许某人有一些提示如何解决它。我总是得到那个错误:
10-25 15:52:02.839: ERROR/AndroidRuntime(2878): FATAL EXCEPTION: main
android.view.InflateException: Binary XML file line #21: Error inflating class org.apache.cordova.CordovaWebView
at android.view.LayoutInflater.createView(LayoutInflater.java:613)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at com.advantageframework.tabs.fragments.SampleFragmentA.onCreateView(SampleFragmentA.java:81)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:871)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1083)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:635)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1431)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:420)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
at android.view.LayoutInflater.createView(LayoutInflater.java:587)
... 19 more
Caused by: java.lang.NullPointerException
at org.apache.cordova.CordovaWebView.loadConfiguration(CordovaWebView.java:643)
at org.apache.cordova.CordovaWebView.<init>(CordovaWebView.java:131)
... 22 more
答案 0 :(得分:6)
我找到了答案。如果您查看logcat,您会看到它尝试将Context转换为CordovaInterface。上下文是活动。它失败了。您可能将Fragment设为CordovaInterface。这就是我做的。您必须使Activity成为CordovaInterface,并从Activity将事件(onMessage,...)转发到Fragment。
这是我的活动(删除一些东西以使其更简单)。我有一些非常接近这个非常好的东西。之后你仍然会遇到一些小问题,但这些问题很容易解决。
public class MyCordovaActivity extends SherlockFragmentActivity implements
CordovaInterface {
private final ExecutorService mThreadPool = Executors.newCachedThreadPool();
private CordovaPlugin mActivityResultCallback;
private CordovaFragment mFragment;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.nbu_web_activity);
mFragment = new CordovaFragment();
getSupportFragmentManager().beginTransaction()
.add(R.id.fragment, mFragment)
.commit();
// TODO this value you could pass to the activity with a intent extra
// or allow to do this through a seperate function, ...
String url = "http://....";
mFragment.loadUrl(url);
}
@Override
protected void onNewIntent(final Intent intent) {
super.onNewIntent(intent);
NBUGapFragment fragment = getCordovaFragment();
if (fragment != null && fragment.appView != null) {
fragment.appView.onNewIntent(intent);
}
}
@Override
public void onBackPressed() {
NBUGapFragment fragment = getCordovaFragment();
if (fragment == null || !fragment.onBackPressed()) {
super.onBackPressed();
}
}
@Override
public void cancelLoadUrl() {
getCordovaFragment().cancelLoadUrl();
}
@Override
public Activity getActivity() {
return this;
}
@Override
public Context getContext() {
return this;
}
@Override
public ExecutorService getThreadPool() {
return mThreadPool;
}
@Override
public Object onMessage(final String id, final Object data) {
return getCordovaFragment().onMessage(id, data);
}
@Override
public void setActivityResultCallback(final CordovaPlugin plugin) {
mActivityResultCallback = plugin;
}
@Override
public void startActivityForResult(final CordovaPlugin plugin, final Intent intent,
final int requestCode) {
mActivityResultCallback = plugin;
startActivityForResult(intent, requestCode);
}
@Override
protected void onActivityResult(final int requestCode, final int resultCode, final Intent intent) {
if (mActivityResultCallback != null) {
mActivityResultCallback.onActivityResult(requestCode, resultCode, intent);
} else {
super.onActivityResult(requestCode, resultCode, intent);
}
}
private CordovaFragment getCordovaFragment() {
// the CordovaFragment is the one implementing CordovaInterface
return mFragment;
}
}
答案 1 :(得分:2)
CordovaWebView假设Inflater的上下文(在本例中为main Activity)实现了CordovaInterface。没有接口通过inflater传递单独的对象(context和CordovaInterface对象),你应该创建代理上下文,其中包含两个对象和委托方法调用每个;
private class CordovaContext extends ContextWrapper implements CordovaInterface
{
CordovaInterface ci;
// Hold two objects. Method call to Context will be proxied by ContextWrapper, so only delegate CordovaInterface.
// You should add/modify when method in CordovaInterface changed
public CordovaContext(Context base, CordovaInterface ci) {
super(base);
this.ci = ci;
}
public void startActivityForResult(CordovaPlugin command,
Intent intent, int requestCode) {
ci.startActivityForResult(command, intent, requestCode);
}
public void setActivityResultCallback(CordovaPlugin plugin) {
ci.setActivityResultCallback(plugin);
}
public Activity getActivity() {
return ci.getActivity();
}
public Object onMessage(String id, Object data) {
return ci.onMessage(id, data);
}
public ExecutorService getThreadPool() {
return ci.getThreadPool();
}
}
在Fragment中,创建使用此Context对象的inflater;
LayoutInflater localInflater = inflater.cloneInContext(new CordovaContext(getActivity(), this));
View v = localInflater.inflate(R.layout.cordovawebview, container, false);
答案 2 :(得分:0)
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.cordovawebview, container, false); // <--- add false parameter
CordovaWebView webView = (CordovaWebView)v.findViewById(R.id.mainView);
return v;
}