我试图将自定义字体设置为ActionBar标题:How to Set a Custom Font in the ActionBar Title?。所以在活动中:

int titleId = getResources().getIdentifier("action_bar_title", "id", "android");
TextView yourTextView = (TextView) findViewById(titleId);
yourTextView.setTextColor(getResources().getColor(R.color.black));
yourTextView.setTypeface(face);

但是onCreate返回findViewById。为什么?
我正在使用支持库:
import android.support.v7.app.ActionBarActivity;

最佳答案

棒棒糖好像坏了。不知道是否有最好的选择,但如果您使用工具栏,您可以这样做:

import android.content.Context;
import android.support.v7.widget.Toolbar;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.widget.TextView;

import org.apache.commons.lang3.reflect.FieldUtils;

public class MyToolbar extends Toolbar {

    protected TextView mmTitleTextView;

    public MyToolbar(Context context) {
        super(context);
    }

    public MyToolbar(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MyToolbar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    // API

    public TextView getTitleTextView() {
        if (mmTitleTextView == null) {
            try {
                mmTitleTextView = (TextView) FieldUtils.readField(this, "mTitleTextView", true);
            } catch (IllegalArgumentException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }

        return mmTitleTextView;
    }
}

在你的活动中:
private MyToolbar mActionBarToolbar;
protected Toolbar getActionBarToolbar() {
    if (mActionBarToolbar == null) {
        mActionBarToolbar = (FWToolbar) findViewById(R.id.toolbar_actionbar);
        if (mActionBarToolbar != null) {
            setSupportActionBar(mActionBarToolbar);
        }
    }
    return mActionBarToolbar;
}
@Override
public void setContentView(int layoutResID) {
    super.setContentView(layoutResID);

    getActionBarToolbar();
}
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);

    if (mActionBarToolbar != null) {
        Typeface typeface = Typeface.createFromAsset(c.getAssets(), "fonts/font.ttf");
        mActionBarToolbar.getTitleTextView().setTypeface(typeface);
    }
}

07-27 16:36