18
Im使用应该显示一个webview的片段。当我尝试从使用它的类中实例化它时,我在logcat中得到以下警告。机器人 - 你有没有添加片段到清单
02-21 23:26:46.843: W/System.err(32468): android.content.ActivityNotFoundException: Unable to find explicit activity class {get.scanner/get.scanner.WebFrag}; have you declared this activity in your AndroidManifest.xml?
我只是学习如何使用碎片,我从来没有尝试过在我的清单宣布他们,我还没有看到任何地方告诉你这样做。
继承人WebFrag类。
public class WebFrag extends Fragment{
private WebView viewer = null;
// if we weren't just using the compat library, we could use WebViewFragment
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
viewer = (WebView) inflater
.inflate(R.layout.webview, container, false);
WebSettings settings = viewer.getSettings();
settings.setJavaScriptEnabled(true);
settings.setDefaultZoom(ZoomDensity.FAR);
return viewer;
}
@Override
public void onPause() {
if (viewer != null) {
viewer.onPause();
}
super.onPause();
}
@Override
public void onResume() {
super.onResume();
if (viewer != null) {
viewer.onResume();
}
}
public void updateUrl(String newUrl) {
if (viewer != null) {
viewer.loadUrl(newUrl);
}
}
}
编辑:添加WebFrag作为活动清单导致以下错误
02-22 00:17:55.711: E/AndroidRuntime(2524): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{get.scanner/get.scanner.WebFrag}: java.lang.ClassCastException: get.scanner.WebFrag
编辑:继承人的主要fragmentactivity哪里我试着用我的类
public class GetScannerActivity extends FragmentActivity {
private String mUrl = "http://www.yahoo.com/";
Button scanButton;
Button paint;
Button compTrans;
String yurl = "http://www.yahoo.com/";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
compTrans = (Button) findViewById(R.id.checkCurrentDeals);
compTrans.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
WebFrag viewer = (WebFrag) getSupportFragmentManager()
.findFragmentById(R.id.web_frag);
try{
if (viewer == null || !viewer.isInLayout()) {
Intent showContent = new Intent(getApplicationContext(),
WebFrag.class);
showContent.setData(Uri.parse(yurl));
try{
startActivity(showContent);
}catch(ActivityNotFoundException e){
e.printStackTrace();
}
} else {
viewer.updateUrl(yurl);
}
}catch(Exception e){
e.printStackTrace();
}
}
});
}
}
是的,我很确定你不这样做。我发布我的其他课,我认为我正在使用它。 – 2012-02-22 08:31:00
通过包装这个片段,你的意思是创建一个扩展我的WebFrag类的fragmentactivity? – 2012-02-22 08:41:44
不,你会创建一个扩展FragmentActivity的'WebActivity'。然后在WebActivity的xml布局中,您将添加您的片段,即 –
Blundell
2012-02-22 08:43:35