我有一个用于登录的片段，它有一个按钮，当点击它时应打开register_fragment，同样在注册时它们的按钮在点击时应该从register_fragemnt获得login_fragment。
这是我试过的代码。
public class Login_fragment extends Fragment implements View.OnClickListener{
Button btnLinkToRegister;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.login_fragment,container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
btnLinkToRegister= (Button) getActivity().findViewById(R.id.btnLinkToRegisterScreen);
btnLinkToRegister.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Fragment register_frag = new Register_fragment();
FragmentTransaction transaction = getActivity().getFragmentManager().beginTransaction();
transaction.replace(R.id.main_activity, register_frag);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
transaction.addToBackStack(null);
transaction.commit();
}
}
Log Cat中显示的消息
04-29 05:25:05.857: E/AndroidRuntime(897): FATAL EXCEPTION: main
04-29 05:25:05.857: E/AndroidRuntime(897): android.content.res.Resources$NotFoundException: Resource ID #0x7f050044 type #0x12 is not valid
04-29 05:25:05.857: E/AndroidRuntime(897): at android.content.res.Resources.loadXmlResourceParser(Resources.java:2144)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.content.res.Resources.getLayout(Resources.java:853)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
04-29 05:25:05.857: E/AndroidRuntime(897): at com.example.appointment_project.Register_fragment.onCreateView(Register_fragment.java:15)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.app.Fragment.performCreateView(Fragment.java:1695)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.app.BackStackRecord.run(BackStackRecord.java:682)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.app.FragmentManagerImpl$1.run(FragmentManager.java:441)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.os.Handler.handleCallback(Handler.java:725)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.os.Handler.dispatchMessage(Handler.java:92)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.os.Looper.loop(Looper.java:137)
04-29 05:25:05.857: E/AndroidRuntime(897): at android.app.ActivityThread.main(ActivityThread.java:5041)
04-29 05:25:05.857: E/AndroidRuntime(897): at java.lang.reflect.Method.invokeNative(Native Method)
04-29 05:25:05.857: E/AndroidRuntime(897): at java.lang.reflect.Method.invoke(Method.java:511)
04-29 05:25:05.857: E/AndroidRuntime(897): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-29 05:25:05.857: E/AndroidRuntime(897): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-29 05:25:05.857: E/AndroidRuntime(897): at dalvik.system.NativeStart.main(Native Method)
显示登录片段，但是当我单击按钮时，我将注册片段，活动崩溃。 请帮助我，我是Android编程的新手。
编辑----- 我在Login_fragment.java中创建了一个由MainActivity.java实现的接口，该方法在类中被覆盖，但我的活动仍然崩溃
MainActivity.java
public class MainActivity extends ActionBarActivity implements SwitchFragments {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// get an instance of FragmentTransaction from your Activity
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
//add a fragment
Login_fragment login_frag= new Login_fragment();
fragmentTransaction.add(R.id.main_activity,login_frag,"Login Fragment");
fragmentTransaction.commit();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void switch_fragmen() {
// TODO Auto-generated method stub
Register_fragment register = new Register_fragment();
FragmentManager manager = getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.main_activity,register);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
transaction.addToBackStack(null);
transaction.commit();
}
}
LoginFragment.java
public class Login_fragment extends Fragment implements View.OnClickListener{
Button btnLinkToRegister;
SwitchFragments switchFragments;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.login_fragment,container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
btnLinkToRegister= (Button) getActivity().findViewById(R.id.btnLinkToRegisterScreen);
btnLinkToRegister.setOnClickListener(this);
}
@Override
public void onAttach(Activity activity) {
// TODO Auto-generated method stub
super.onAttach(activity);
switchFragments = (SwitchFragments) activity;
}
@Override
public void onClick(View v) {
switchFragments.switch_fragmen();
}
public interface SwitchFragments{
public void switch_fragmen();
}
}
可能是什么问题？
答案 0 :(得分：0)
Resources$NotFoundException
如果您正在访问Activity的{{1}}布局，那么您无法访问。
Fragment您似乎通过Fragment类管理transaction.replace(R.id.main_activity, register_frag);
的问题。
这不是一个好方法。
最好尝试从FragmentTransaction本身替换Fragment。
编辑：----------------------
Activity在MainActivity中实现此界面。
然后
public class Register_fragment extends Fragment implements View.OnClickListener{
Button login;
Communicate com;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
com = (Communicate) activity;
}
// Created an Interface
interface Communicate{
public void changeLayout();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return super.onCreateView(inflater, container, savedInstanceState);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
login =// initiliza here
}
@Override
public void onClick(View v) {
com.changeLayout();
}
}
必需修复：
尝试在@Override
public void changeLayout() {
Register_fragment register_frag = new Register_fragment();
android.app.FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.main_activity, register_frag);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
transaction.addToBackStack(null);
transaction.commit();
}
onCreateView答案 1 :(得分：0)
试试这个
FragmentManager fm = getActivity().getFragmentManager();
fm.beginTransaction().replace(R.id.main_activity,
new RegisterFragment(), "registerFragment")
.addToBackStack("register").commit();