一、ListFragment有默认的布局文件;

二、自定义适配器

private class CrimeAdapter extends ArrayAdapter{

public CrimeAdapter(List crimes){

this(CrimeListFragment.this.getActivity(),0,crimes);

}

public CrimeAdapter(Context context,int resource, List objects) {

super(context, resource, objects);

}

@NonNull

@Override

publicView getView(intposition, View convertView, ViewGroup parent) {

if(convertView==null){

convertView=CrimeListFragment.this.getActivity().getLayoutInflater().inflate(R.layout.list_item_crime,null);

}

Crimecrime=this.getItem(position);

TextView titleView=(TextView) convertView.findViewById(R.id.crime_list_item_title);

titleView.setText(crime.getmTitle());

TextView dateView=(TextView)convertView.findViewById(R.id.crime_list_item_date);

dateView.setText(crime.getmDate().toString());

CheckBox checkBox=(CheckBox)convertView.findViewById(R.id.crime_list_item_checkbox);

checkBox.setChecked(crime.ismSolved());

returnconvertView;

}

}

三、在Fragment中关联适配器，并给适配器传入业务数据

public void onCreate(@NullableBundle savedInstanceState) {

super.onCreate(savedInstanceState);

FragmentActivity activity=this.getActivity();//托管的activity

activity.setTitle(R.string.crime_title);

this.mCrimes=CrimeLab.get(activity).getCrimes();

// ArrayAdapter adapter=new ArrayAdapter(activity,android.R.layout.simple_expandable_list_item_1,mCrimes);

CrimeAdapter adapter=newCrimeAdapter(this.mCrimes);//this.mCrimes就是业务数据

this.setListAdapter(adapter);

}

四、抽象Activity调用Fragment的代码，方便复用

public abstract class SingleFragmentActivity extends AppCompatActivity {

protected abstractFragment createFragment();

@Override

protected voidonCreate(@NullableBundle savedInstanceState) {

super.onCreate(savedInstanceState);

this.setContentView(R.layout.activity_fragment);

FragmentManager fManager=this.getSupportFragmentManager();

Fragmentfragment=fManager.findFragmentById(R.id.fragmentContainer);

if(fragment==null){

fragment=this.createFragment();

fManager.beginTransaction().add(R.id.fragmentContainer,fragment).commit();

}

}

}

五、在Activity中调用Fragment

public class CrimeListActivity extends SingleFragmentActivity {

@Override

protectedFragment createFragment() {

return new CrimeListFragment();

}

}