为什么这不起作用？我在 setContentView 和 findViewById 上遇到错误。
Utesteder 类型的方法未定义。
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我是应用程序开发的新手。
package hib.bergen2;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class Utesteder extends Fragment {
TextView exodusTekst;
Button exodusKnapp;
TextView fotballpubenTekst;
Button fotballpubenKnapp;
TextView ovenpoTekst;
Button ovenpoKnapp;
TextView kvarteretTekst;
Button kvarteretKnapp;
TextView hulenTekst;
Button hulenKnapp;
TextView sjobodenTekst;
Button sjobodenKnapp;
TextView downstairsTekst;
Button downstairsKnapp;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_utesteder);
exodusTekst = (TextView) findViewById(R.id.exodusTekst);
exodusKnapp= (Button) findViewById(R.id.exodusKnapp);
exodusKnapp.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
exodusTekst.setVisibility((exodusTekst.getVisibility() == View.VISIBLE)? View.GONE : View.VISIBLE);
fotballpubenTekst.setVisibility(View.GONE);
ovenpoTekst.setVisibility(View.GONE);
kvarteretTekst.setVisibility(View.GONE);
hulenTekst.setVisibility(View.GONE);
sjobodenTekst.setVisibility(View.GONE);
downstairsTekst.setVisibility(View.GONE);
}
});
fotballpubenTekst = (TextView) findViewById(R.id.fotballpubenTekst);
fotballpubenKnapp= (Button) findViewById(R.id.fotballpubenKnapp);
fotballpubenKnapp.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
fotballpubenTekst.setVisibility((fotballpubenTekst.getVisibility() == View.VISIBLE)? View.GONE : View.VISIBLE);
exodusTekst.setVisibility(View.GONE);
ovenpoTekst.setVisibility(View.GONE);
kvarteretTekst.setVisibility(View.GONE);
hulenTekst.setVisibility(View.GONE);
sjobodenTekst.setVisibility(View.GONE);
downstairsTekst.setVisibility(View.GONE);
}
});
ovenpoTekst = (TextView) findViewById(R.id.ovenpoTekst);
ovenpoKnapp= (Button) findViewById(R.id.ovenpoKnapp);
ovenpoKnapp.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
ovenpoTekst.setVisibility((ovenpoTekst.getVisibility() == View.VISIBLE)? View.GONE : View.VISIBLE);
exodusTekst.setVisibility(View.GONE);
fotballpubenTekst.setVisibility(View.GONE);
kvarteretTekst.setVisibility(View.GONE);
hulenTekst.setVisibility(View.GONE);
sjobodenTekst.setVisibility(View.GONE);
downstairsTekst.setVisibility(View.GONE);
}
});
kvarteretTekst = (TextView) findViewById(R.id.kvarteretTekst);
kvarteretKnapp= (Button) findViewById(R.id.kvarteretKnapp);
kvarteretKnapp.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
kvarteretTekst.setVisibility((kvarteretTekst.getVisibility() == View.VISIBLE)? View.GONE : View.VISIBLE);
exodusTekst.setVisibility(View.GONE);
fotballpubenTekst.setVisibility(View.GONE);
ovenpoTekst.setVisibility(View.GONE);
hulenTekst.setVisibility(View.GONE);
sjobodenTekst.setVisibility(View.GONE);
downstairsTekst.setVisibility(View.GONE);
}
});
hulenTekst = (TextView) findViewById(R.id.hulenTekst);
hulenKnapp= (Button) findViewById(R.id.hulenKnapp);
hulenKnapp.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
hulenTekst.setVisibility((hulenTekst.getVisibility() == View.VISIBLE)? View.GONE : View.VISIBLE);
exodusTekst.setVisibility(View.GONE);
fotballpubenTekst.setVisibility(View.GONE);
ovenpoTekst.setVisibility(View.GONE);
kvarteretTekst.setVisibility(View.GONE);
sjobodenTekst.setVisibility(View.GONE);
downstairsTekst.setVisibility(View.GONE);
}
});
sjobodenTekst = (TextView) findViewById(R.id.sjobodenTekst);
sjobodenKnapp= (Button) findViewById(R.id.sjobodenKnapp);
sjobodenKnapp.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
sjobodenTekst.setVisibility((sjobodenTekst.getVisibility() == View.VISIBLE)? View.GONE : View.VISIBLE);
exodusTekst.setVisibility(View.GONE);
fotballpubenTekst.setVisibility(View.GONE);
ovenpoTekst.setVisibility(View.GONE);
kvarteretTekst.setVisibility(View.GONE);
hulenTekst.setVisibility(View.GONE);
downstairsTekst.setVisibility(View.GONE);
}
});
downstairsTekst = (TextView) findViewById(R.id.downstairsTekst);
downstairsKnapp= (Button) findViewById(R.id.downstairsKnapp);
downstairsKnapp.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
downstairsTekst.setVisibility((downstairsTekst.getVisibility() == View.VISIBLE)? View.GONE : View.VISIBLE);
exodusTekst.setVisibility(View.GONE);
fotballpubenTekst.setVisibility(View.GONE);
ovenpoTekst.setVisibility(View.GONE);
kvarteretTekst.setVisibility(View.GONE);
hulenTekst.setVisibility(View.GONE);
sjobodenTekst.setVisibility(View.GONE);
}
});
}
}
package hib.bergen2;
import java.util.Locale;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class Uteliv extends FragmentActivity {
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link android.support.v4.app.FragmentPagerAdapter} derivative, which
* will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {@link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_uteliv);
// Create the adapter that will return a fragment for each of the three
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(
getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.uteliv, menu);
return true;
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int page) {
switch (page) {
case 0: return new Utesteder();
/*case 1: return new MySecondFragment();
case 2: return new MyThirdFragment();
//and so on....*/
}
return null;
}
@Override
public int getCount() {
// Show 3 total pages.
return 3;
}
@Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
}
return null;
}
}
/**
* A dummy fragment representing a section of the app, but that simply
* displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_uteliv_dummy,
container, false);
TextView dummyTextView = (TextView) rootView
.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(
ARG_SECTION_NUMBER)));
return rootView;
}
}
}