试着这样做……

public void onCreate(Bundle savedInstanceState) 
{
super.onCreate(savedInstanceState);
    this.setTitle(String.format(your_format_string, your_personal_text_to_display));
    setContentView(R.layout.your_layout);
       ...
       ...
}

这对我很有用

你可以在Activity中使用setTitle以编程方式定义你的标题，这个方法可以接受在values/strings.xml文件中定义的String或ID。例子:

public class YourActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {

        setTitle(R.string.your_title);
        setContentView(R.layout.main);

    }
}

试着这样做……

public void onCreate(Bundle savedInstanceState) 
{
super.onCreate(savedInstanceState);
    this.setTitle(String.format(your_format_string, your_personal_text_to_display));
    setContentView(R.layout.your_layout);
       ...
       ...
}

这对我很有用

ActionBar ab = getActionBar();
TextView tv = new TextView(getApplicationContext());

LayoutParams lp = new RelativeLayout.LayoutParams(
        LayoutParams.MATCH_PARENT, // Width of TextView
        LayoutParams.WRAP_CONTENT);
tv.setLayoutParams(lp);
tv.setTextColor(Color.RED);
ab.setCustomView(tv);

欲了解更多信息，请查看此链接:

http://android--code.blogspot.in/2015/09/android-how-to-change-actionbar-title_21.html

在Activity.onCreate()回调中或在另一个需要更改标题的地方:

getSupportActionBar().setTitle("Whatever title");

我们可以用以下两种方式之一更改动作栏标题:

In the Manifest: in the manifest file, set the label of each Activity. android:label="@string/TitleWhichYouWantToDisplay" In code: in code, call the setTitle() method with a String or the id of String as the argument. public class MainActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { setTitle(R.string.TitleWhichYouWantToDisplay); // OR You can also use the line below // setTitle("MyTitle") setContentView(R.layout.activity_main); } }