我有一个使用选项卡布局和RecyclerView来获取项目的应用。我有2个不同的标签，我想在它们上使用两种不同的字体。我有OneActivity，对于tabsi，有FirstFragment，SecondFragment。
我可以使用RecyclerView_Adapter更改整个应用程序的字体。但是我不想更改整个应用程序的字体。在FirstFragment（第一个选项卡）中，我想使用Arial和Text大小为20 sp，在SecondFragment中，我想使用Comic Sans和Text大小为16 sp。
我该怎么办，有可能吗？
OneActivity.Java
public class OneActivity extends AppCompatActivity {
private static Toolbar toolbar;
private static ViewPager viewPager;
private static TabLayout tabLayout;
private static BottomNavigationView bottomNavigationView;
private ImageButton forwardbtn, backwardbtn, pausebtn, playbtn;
private MediaPlayer mPlayer;
private TextView songName, startTime, songTime;
private SeekBar songPrgs;
private static int oTime =0, sTime =0, eTime =0, fTime = 15000, bTime = 15000;
private Handler hdlr = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_one);
backwardbtn = (ImageButton)findViewById(R.id.btnBackward);
forwardbtn = (ImageButton)findViewById(R.id.btnForward);
playbtn = (ImageButton)findViewById(R.id.btnPlay);
pausebtn = (ImageButton)findViewById(R.id.btnPause);
startTime = (TextView)findViewById(R.id.txtStartTime);
songTime = (TextView)findViewById(R.id.txtSongTime);
mPlayer = MediaPlayer.create(this, R.raw.deneme);
songPrgs = (SeekBar)findViewById(R.id.sBar);
songPrgs.setClickable(false);
pausebtn.setEnabled(false);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
viewPager = (ViewPager) findViewById(R.id.viewPager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabLayout);
tabLayout.setupWithViewPager(viewPager);//setting tab over viewpager
bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottomNavigationView);
//Implementing tab selected listener over tablayout
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());//setting current selected item over viewpager
switch (tab.getPosition()) {
case 0:
Log.e("TAG","TAB1");
break;
case 1:
Log.e("TAG","TAB2");
break;
}
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
playbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(OneActivity.this, "One Oynatılıyor", Toast.LENGTH_SHORT).show();
mPlayer.start();
eTime = mPlayer.getDuration();
sTime = mPlayer.getCurrentPosition();
if(oTime == 0){
songPrgs.setMax(eTime);
}
songTime.setText(String.format("%d dk, %d sn", TimeUnit.MILLISECONDS.toMinutes(eTime),
TimeUnit.MILLISECONDS.toSeconds(eTime) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS. toMinutes(eTime))) );
startTime.setText(String.format("%d dk, %d sn", TimeUnit.MILLISECONDS.toMinutes(sTime),
TimeUnit.MILLISECONDS.toSeconds(sTime) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS. toMinutes(sTime))) );
songPrgs.setProgress(sTime);
hdlr.postDelayed(UpdateSongTime, 100);
pausebtn.setEnabled(true);
playbtn.setEnabled(false);
}
});
pausebtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mPlayer.pause();
pausebtn.setEnabled(false);
playbtn.setEnabled(true);
Toast.makeText(getApplicationContext(),"One Duraklatıldı", Toast.LENGTH_SHORT).show();
}
});
forwardbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if((sTime + fTime) <= eTime)
{
sTime = sTime + fTime;
mPlayer.seekTo(sTime);
}
else
{
Toast.makeText(getApplicationContext(), "Daha fazla ileri sarılamaz", Toast.LENGTH_SHORT).show();
}
if(!playbtn.isEnabled()){
playbtn.setEnabled(true);
}
}
});
backwardbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if((sTime - bTime) > 0)
{
sTime = sTime - bTime;
mPlayer.seekTo(sTime);
}
else
{
Toast.makeText(getApplicationContext(), "Daha fazla geri sarılamaz", Toast.LENGTH_SHORT).show();
}
if(!playbtn.isEnabled()){
playbtn.setEnabled(true);
}
}
});
}
public Runnable UpdateSongTime = new Runnable() {
@Override
public void run() {
sTime = mPlayer.getCurrentPosition();
startTime.setText(String.format("%d dk, %d sn", TimeUnit.MILLISECONDS.toMinutes(sTime),
TimeUnit.MILLISECONDS.toSeconds(sTime) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(sTime))) );
songPrgs.setProgress(sTime);
hdlr.postDelayed(this, 100);
songPrgs.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if(mPlayer != null && fromUser){
mPlayer.seekTo(progress); // clear ' * 1000 '
}
}
});
}
};
public void onBackPressed(){
mPlayer.stop();
finish();
}
//Setting View Pager
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFrag(new FirstFragment("Android"), "Android");
adapter.addFrag(new SecondFragment("Ios"), "Ios");
viewPager.setAdapter(adapter);
}
//View Pager fragments setting adapter class
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();//fragment arraylist
private final List<String> mFragmentTitleList = new ArrayList<>();//title arraylist
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
//adding fragments and title method
public void addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
FirstFragment
public class FirstFragment extends Fragment {
private View view;
private String title;//String for tab title
private String ebaka;
// Intent it = getActivity().getIntent();
// String isim = getActivity().getIntent().getStringExtra("FOO");
// Bundle bundle = getActivity().getIntent().getExtras();
// String value = bundle.getString("key1");
private static RecyclerView recyclerView;
public FirstFragment() {
}
@SuppressLint("ValidFragment")
public FirstFragment(String title) {
this.title = title;//Setting tab title
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.dummy_fragment, container, false);
// getActivity().getActionBar().setTitle(title);
setRecyclerView();
return view;
}
//Setting recycler view
private void setRecyclerView() {
recyclerView = (RecyclerView) view
.findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
recyclerView
.setLayoutManager(new LinearLayoutManager(getActivity()));//Linear Items
// String[] eArray=getActivity().getResources().getStringArray(R.array.books);
//
String[] ebaka=getActivity().getResources().getStringArray(R.array.bakara);
ArrayList<String> arrayList = new ArrayList<>();
// arrayList.add("cdscsdc");
for (int i = 0; i < ebaka.length; i++) {
arrayList.add(ebaka[i]);
}
RecyclerView_Adapter adapter = new RecyclerView_Adapter(getActivity(), arrayList);
recyclerView.setAdapter(adapter);// set adapter on recyclerview
}
}
RecyclerView_Adapter
public class RecyclerView_Adapter extends RecyclerView.Adapter<DemoViewHolder> {
private ArrayList<String> arrayList;
private Context context;
public RecyclerView_Adapter(Context context,
ArrayList<String> arrayList) {
this.context = context;
this.arrayList = arrayList;
this.arrayList = arrayList;
}
@Override
public int getItemCount() {
return (null != arrayList ? arrayList.size() : 0);
}
@Override
public void onBindViewHolder(DemoViewHolder holder,
int position) {
Typeface customTypeOne = Typeface.createFromAsset(context.getAssets(), "arial.ttf");
final DemoViewHolder mainHolder = (DemoViewHolder) holder;
//Setting text over textview
mainHolder.title.setText(arrayList.get(position));
mainHolder.title.setTypeface(customTypeOne); // With this code i change font, but it is changing whole apps font. i don't need that.
}
@Override
public DemoViewHolder onCreateViewHolder(
ViewGroup viewGroup, int viewType) {
LayoutInflater mInflater = LayoutInflater.from(viewGroup.getContext());
ViewGroup mainGroup = (ViewGroup) mInflater.inflate(
R.layout.item_row, viewGroup, false);
DemoViewHolder mainHolder = new DemoViewHolder(mainGroup) {
@Override
public String toString() {
return super.toString();
}
};
return mainHolder;
}
}
DemoViewHolder
public abstract class DemoViewHolder extends RecyclerView.ViewHolder {
public TextView title;
public DemoViewHolder(View view) {
super(view);
this.title = (TextView) view.findViewById(R.id.cardTitle);
}
}
更新适配器constructor和onBindViewHolder()：
public class RecyclerView_Adapter extends RecyclerView.Adapter<DemoViewHolder> {
private ArrayList<String> arrayList;
private Context context;
//add this
private String comingFrom;
//constructor
public RecyclerView_Adapter(Context context, ArrayList<String> arrayList, String comingFrom) {
this.context = context;
this.arrayList = arrayList;
this.arrayList = arrayList;
this.comingFrom = comingFrom;
}
........
........
@Override
public void onBindViewHolder(DemoViewHolder holder,int position) {
Typeface customTypeOne = Typeface.createFromAsset(context.getAssets(),"arial.ttf");
final DemoViewHolder mainHolder = (DemoViewHolder) holder;
//Setting text over textview
mainHolder.title.setText(arrayList.get(position));
//check in which fragment you are
if(comingFrom.equals("fragment_one")){
//in fragment one set some font
mainHolder.title.setTypeface(........);
}else{
//in fragment two set some other font
mainHolder.title.setTypeface(.........);
}
}
............
}
从FirstFragment初始化适配器时：
.......
.......
RecyclerView_Adapter adapter = new RecyclerView_Adapter(getActivity(), arrayList, "fragment_one");
recyclerView.setAdapter(adapter);// set adapter on recyclerview
........
从SecondFragment初始化适配器时：
.......
.......
RecyclerView_Adapter adapter = new RecyclerView_Adapter(getActivity(), arrayList, "fragment_two");
recyclerView.setAdapter(adapter);// set adapter on recyclerview
........