使用选项卡布局从活动中启动选项卡片段

• Z时代
• 2024-01-10
• 分类：问答

我有一个选项卡片段应用程序。问题是当我进入我的应用程序内部的一个活动，并希望返回到我的标签布局它返回没有选项卡行布局。我只能看到特定的片段页面，而没有上面的行（选项卡的行），这使我能够在选项卡之间导航。 你知道我能做些什么来解决它吗？我怎样才能看到标签的行呢？ 感谢您的帮助，使用选项卡布局从活动中启动选项卡片段

这是我希望看到的活动后面的第一个标签：

public class Tab1MyProfile extends Fragment { 
    @Nullable 
    @Override 
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
     View rootView = inflater.inflate(R.layout.tab1_my_profile, container, false); 
     return rootView; 
    } 
} 

这是包含代码回到该片段选项卡活动：

public class GameLive extends AppCompatActivity implements RecognitionListener { 
    private Intent intent; 
    private Button mStopButton; 
    public void stopGame (View view) { 
     AlertDialog.Builder builder = new AlertDialog.Builder(this); 
     builder.setMessage("Are you sure you want to finish the game?") 
       .setCancelable(false) 
       .setPositiveButton("Yes", new DialogInterface.OnClickListener() { 
        public void onClick(DialogInterface dialog, int id) { 
         FragmentManager fragmentManager = getSupportFragmentManager(); 
         FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); 
         Tab1MyProfile fragment = new Tab1MyProfile(); 
         fragmentTransaction.replace(android.R.id.content, fragment); 
         fragmentTransaction.commit(); 
        } 
       }) 
       .setNegativeButton("No", new DialogInterface.OnClickListener() { 
        public void onClick(DialogInterface dialog, int id) { 
         dialog.cancel(); 
        } 
       }); 
     AlertDialog alert = builder.create(); 
     alert.show(); 
    } 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.game_live); 
     mStopButton = (Button) findViewById(R.id.btnEndGame); 
     mStopButton.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       stopGame(view); 
      } 
     }); 
    } 
} 

这是一个包含所有选项卡的片段的活动：

public class StartActivity extends AppCompatActivity { 
    private SectionsPagerAdapter mSectionsPagerAdapter; 
    private ViewPager mViewPager; 
    @TargetApi(Build.VERSION_CODES.M) 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_start); 
     mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); 
     // Set up the ViewPager with the sections adapter. 
     mViewPager = (ViewPager) findViewById(R.id.container); 
     mViewPager.setAdapter(mSectionsPagerAdapter); 
     TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs); 
     tabLayout.setupWithViewPager(mViewPager); 
    } 
    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_start, menu); 
     return true; 
    } 
    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 
    /** 
    * A {@link FragmentPagerAdapter} that returns a fragment corresponding to 
    * one of the sections/tabs/pages. 
    */ 
    public class SectionsPagerAdapter extends FragmentPagerAdapter { 
     public SectionsPagerAdapter(FragmentManager fm) { 
      super(fm); 
     } 
     @Override 
     public Fragment getItem(int position) { 
      switch (position) { 
       case 0: 
        Tab1MyProfile tab1=new Tab1MyProfile(); 
        return tab1; 
       case 1: 
        Tab2StartGame tab2=new Tab2StartGame(); 
        return tab2; 
       case 2: 
        Tab3StatsArea tab3=new Tab3StatsArea(); 
        return tab3; 
       case 3: 
        Tab4Settings tab4=new Tab4Settings(); 
        return tab4; 
      } 
      return null; 
     } 
     @Override 
     public int getCount() { 
      // Show 4 total pages. 
      return 4; 
     } 
     @Override 
     public CharSequence getPageTitle(int position) { 
      switch (position) { 
       case 0: 
        return "My profile"; 
       case 1: 
        return "Start Game"; 
       case 2: 
        return "Stats Area"; 
       case 3: 
        return "Settings"; 
      } 
      return null; 
     } 
    } 
} 

再次感谢！

回答：

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