找不到符号方法 getSupportActionBar()

Question

我知道这个问题已经发布了很多次，但即使我尝试了很多来自 Stack Overflow.

的解决方案，我仍然无法解决

import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import com.example.project.myapplication.API.InfoAPI;
import com.example.project.myapplication.Adapter.TabsFragmentPagerAdapter;


public class Edit extends FragmentActivity implements ActionBar.TabListener {

    private ViewPager viewPager;
    private ActionBar actionBar;
    private TabsFragmentPagerAdapter tabsAdapter;
    private String[] activities = new String[]{"Information","Work Force","Work Details"};
    ListView listViewEdit;
    InfoAPI sqlcon;
    private MyDatabaseHelper dbHelper;
    private SQLiteDatabase database;
    private SimpleCursorAdapter dataAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.edit);
        viewPager = (ViewPager) findViewById(R.id.viewPager);
        tabsAdapter = new TabsFragmentPagerAdapter(getSupportFragmentManager());
        viewPager.setAdapter(tabsAdapter);
        actionBar = (ActionBarActivity)getApplicationContext().getSupportActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        for(int i=0; i<3; i++){
            actionBar.addTab(actionBar.newTab().setText(activities[i]).setTabListener(this));
        }

这一行有错误actionBar = (ActionBarActivity)getApplicationContext().getSupportActionBar();

错误

Error:(48, 63) error: cannot find symbol method getSupportActionBar()
Error:(48, 21) error: incompatible types: ActionBarActivity cannot be converted to ActionBar

Answer 1

您需要将 FragmentActivity 更改为 ActionBarActivity 由于FragmentActivity中没有提供此方法，所以更改。

public class mainActivity extends ActionBarActivity

检查这个Link

Answer 2

让 Edit 扩展 AppCompatActivity 而不是 FragmentActivity。 AppCompatActivity 扩展了 FragmentActivity 并添加了对 ActionBar 的支持。你可以阅读更多here

Answer 3

替换

public class Edit extends FragmentActivity implements ActionBar.TabListener

与

public class Edit extends ActionBarActivity implements ActionBar.TabListener

你行

actionBar = (ActionBar)getApplicationContext().getSupportActionBar();

找不到符号方法 getSupportActionBar()

cannot find symbol method getSupportActionBar()

android

tabs

android-actionbar

swipeview