我正在使用RecyclerView来填充云中的数据。但看起来，设置TextView的自定义字体并不容易，因为它在视图中。传统方式，这就是我的尝试：
TextView tx = (TextView)findViewById(R.id.person_age);
Typeface custom_font = Typeface.createFromAsset(getAssets(), "fonts/Dancing Script.ttf");
tx.setTypeface(custom_font);
但是在这里，它崩溃了应用程序，所以寻找修复，这里是Main Activiy的代码：
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Parse.initialize(this, "app-id", "clientkey");
setContentView(R.layout.activity_big_board);
initializeData();
TextView tx = (TextView)findViewById(R.id.person_age);
Typeface custom_font = Typeface.createFromAsset(getAssets(), "fonts/Dancing Script.ttf");
tx.setTypeface(custom_font);
adapter = new RVAdapter(persons);
rv=(RecyclerView)findViewById(R.id.rv);
LinearLayoutManager llm = new LinearLayoutManager(this);
rv.setLayoutManager(llm);
rv.setHasFixedSize(true);
initializeAdapter();
}
private void initializeData(){
persons = new ArrayList<>();
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>("BigBoard");
query.findInBackground(new FindCallback<ParseObject>() {
public void done(List<ParseObject> credentialList, ParseException e) {
if (e == null) {
for(int i=0;i<credentialList.size();i++)
{
a=credentialList.get(i).getString("Location");
b=credentialList.get(i).getString("Feed");
persons.add(new Person(a,b));
Log.d("OUT", "So the Val::------> " +a +b);
}
} else {
Log.d("score", "Error: " + e.getMessage());
}
adapter.notifyDataSetChanged();
}
});
}
private void initializeAdapter(){
rv.setAdapter(adapter);
}
以下是Adapter类的代码：
public class RVAdapter extends RecyclerView.Adapter<RVAdapter.PersonViewHolder> {
public static class PersonViewHolder extends RecyclerView.ViewHolder {
CardView cv;
TextView personName;
TextView personAge;
//ImageView personPhoto;
PersonViewHolder(View itemView) {
super(itemView);
cv = (CardView)itemView.findViewById(R.id.cv);
personName = (TextView)itemView.findViewById(R.id.person_name);
personAge = (TextView)itemView.findViewById(R.id.person_age);
//personPhoto = (ImageView)itemView.findViewById(R.id.person_photo);
}
}
List<Person> persons;
RVAdapter(List<Person> persons){
this.persons = persons;
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
@Override
public PersonViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item, viewGroup, false);
PersonViewHolder pvh = new PersonViewHolder(v);
return pvh;
}
@Override
public void onBindViewHolder(PersonViewHolder personViewHolder, int i) {
personViewHolder.personName.setText(persons.get(i).name);
personViewHolder.personAge.setText(persons.get(i).surname);
// personViewHolder.personPhoto.setImageResource(persons.get(i).photoId);
}
@Override
public int getItemCount()
{
if(persons!=null)
{
return persons.size();
}
else
{
return 0;
}
}
}
那么，在没有对UI线程造成任何问题的情况下，最好的方法是什么？谢谢，
答案 0 :(得分：2)
将Typeface逻辑移入PersonViewHolder，可能在其构造函数中，原因有两个：
此时TextView存在。
您的RecyclerView可能会有多个PersonViewHolder，在这种情况下，您需要在每个 {{1}中设置Typeface }，因为会有多个项目和多个PersonViewHolder需要TextView。
答案 1 :(得分：1)
public class Adapter_Recycler_Film extends RecyclerView.Adapter<Adapter_Recycler_Film.DataViewHolder> {
private static Typeface face;
private Context mContext;
Adapter_Recycler_Film.DataViewHolder viewHolder;
public Adapter_Recycler_Film(Context context,List<String> dateData) {
........
this.mContext=context;
face = Typeface.createFromAsset(mContext.getAssets(),"fonts/IRANSansMobile(FaNum)_Medium.ttf");
}
}
public class DataViewHolder extends RecyclerView.ViewHolder {
public TextView tDate;
public DataViewHolder(View itemView) {
super(itemView);
tDate = (TextView) itemView.findViewById(R.id.txt);
if(tDate!=null){
tDate.setTypeface(face);
}
}
}
答案 2 :(得分：0)
@ CommonsWare的回答可能与您的具体案例最相关。从效率，可读性和后见之明的角度来看，我建议创建自定义TextView，然后将TextView分配到RecyclerView的项目行或应用程序中需要指定的任何位置这件事的字体。
CustomFontTextView.java
package icn.premierandroid.misc;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.TextView;
import icn.premierandroid.R;
public class CustomFontTextView extends TextView {
AttributeSet attr;
public CustomFontTextView(Context context) {
super(context);
setCustomFont(context, attr);
}
public CustomFontTextView(Context context, AttributeSet attrs) {
super(context, attrs);
setCustomFont(context, attrs);
}
public CustomFontTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setCustomFont(context, attrs);
}
private void setCustomFont(Context ctx, AttributeSet attrs) {
String customFont = null;
TypedArray a = null;
if (attrs != null) {
a = ctx.obtainStyledAttributes(attrs, R.styleable.CustomFontTextView);
customFont = a.getString(R.styleable.CustomFontTextView_customFont);
}
if (customFont == null) customFont = "fonts/portrait-light.ttf";
setCustomFont(ctx, customFont);
if (a != null) {
a.recycle();
}
}
public boolean setCustomFont(Context ctx, String asset) {
Typeface tf = null;
try {
tf = Typeface.createFromAsset(ctx.getAssets(), asset);
} catch (Exception e) {
Log.e("textView", "Could not get typeface", e);
return false;
}
setTypeface(tf);
return true;
}
}
值/ attrs.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="CustomFontTextView">
<attr name="customFont" format="string"/>
</declare-styleable>
</resources >
RecyclerView
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="100dp"
card_view:cardUseCompatPadding="true"
card_view:cardCornerRadius="8dp">
/** Containers and other Components **/
<icn.premierandroid.misc.CustomFontTextView
android:id="@+id/comment_user_name"
android:layout_height="match_parent"
android:layout_width="0dp"
android:layout_marginStart="5dp"
android:layout_marginLeft="5dp"
android:gravity="center_vertical"
android:layout_weight="0.36"/>
<icn.premierandroid.misc.CustomFontTextView
android:layout_width="0dp"
android:layout_weight="0.40"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:layout_marginStart="1dp"
android:layout_marginLeft="1dp" />
<icn.premierandroid.misc.CustomFontTextView
android:id="@+id/comment_time"
android:layout_width="0dp"
android:layout_weight="0.25"
android:gravity="center_vertical"
android:layout_height="match_parent"/>
/** Containers and other Components **/
</android.support.v7.widget.CardView>
使用此代码，您无需更改RecyclerView.Adapter，RecyclerView.ViewHolder或已初始化TextView的任何位置。
注意：您仍然可以使用TextView textView = (TextView) findViewById(R.id.textView);初始化组件。 XML为您完成所有工作。除非您以编程方式创建TextView个组件，否则您需要将其创建为CustomFontTextView textView = new CustomFontTextView();
此外，您可以将相同的逻辑应用于几乎所有组件，例如EditText，Switches，RadioButtons，TabLayouts等
答案 3 :(得分：-1)
创建扩展应用程序的其他类
public class yourApplication extends Application {
public Typeface robotoRegular;
public Typeface robotoLight;
public Typeface robotoBold;
public Typeface robotoMedium;
@Override
public void onCreate() {
super.onCreate();
robotoRegular = Typeface.createFromAsset(this.getAssets(), getResources().getString(R.string.robotoRegular));
robotoLight = Typeface.createFromAsset(this.getAssets(), getResources().getString(R.string.robotoLight));
robotoBold = Typeface.createFromAsset(this.getAssets(), getResources().getString(R.string.robotoBold));
robotoMedium = Typeface.createFromAsset(this.getAssets(), getResources().getString(R.string.robotoMedium));
}
}
然后将其设置为活页夹
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
final String name = mDataset.get(position);
holder.txtHeader.setTypeface(((yourApplication) mContext.getApplicationContext()).robotoRegular);
holder.txtFooter.setTypeface(((yourApplication) mContext.getApplicationContext()).robotoLight);
}