Tab變化監聽器android

我的HomeActivity擴展了使用2個選項卡的AppCompatActivity。Tab變化監聽器android

public class HomeActivity extends AppCompatActivity { 

    private SectionsPagerAdapter mSectionsPagerAdapter; 
    private TabLayout tabLayout; 
    ... 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 

     ... 
     mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); 
     tabLayout = (TabLayout) findViewById(R.id.tabs); 
     tabLayout.setupWithViewPager(mViewPager); 
    } 

    ...

如何收聽標籤更改事件？讓我知道是否需要添加任何更多的代碼才能清晰。

來源

2017-03-27 jay

你有事件一派是什麼？ – azizbekian

http://stackoverflow.com/a/30904479/2784838 –

setOnTabSelectedListener已棄用。 – jay

您可以使用下面OnTabChangeListener.See

TabLayout tabLayout = new TabLayout(this); 
    tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() { 
     @Override 
     public void onTabSelected(TabLayout.Tab tab) { 
      //do stuff here 
     } 

     @Override 
     public void onTabUnselected(TabLayout.Tab tab) { 

     } 

     @Override 
     public void onTabReselected(TabLayout.Tab tab) { 

     } 
    });

希望它能幫助。你想要什麼

tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() { 
     @Override 
     public void onTabSelected(TabLayout.Tab tab) { 
      viewPager.setCurrentItem(tab.getPosition()); 
      if (tab.getPosition() == 0) { 
       toolBarTitle.setText("Tab one"); 
      } else if (tab.getPosition() == 1) { 
       toolBarTitle.setText("Tab two"); 
      } else { 
       toolBarTitle.setText("Tab three"); 
      } 
     } 

     @Override 
     public void onTabUnselected(TabLayout.Tab tab) { 

     } 

     @Override 
     public void onTabReselected(TabLayout.Tab tab) { 

     } 
    });

來源

2017-03-27 12:01:47

從Documentation

您需要實現TabLayout.OnTabSelectedListener

public class HomeActivity extends AppCompatActivity implements TabLayout.OnTabSelectedListener

覆蓋監聽事件的方法如下：

@Override 
    public void onTabSelected(TabLayout.Tab tab) { 
      int position = tab.getPosition(); 
    } 

    @Override 
    public void onTabUnselected(TabLayout.Tab tab) { 

    } 

    @Override 
    public void onTabReselected(TabLayout.Tab tab) { 

    }

來源

2017-03-27 11:57:21 rafsanahmad007

使用ViewPager.onPageChangeListener：

mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { 
     @Override 
     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 

     } 

     @Override 
     public void onPageSelected(int position) { 

     } 

     @Override 
     public void onPageScrollStateChanged(int state) { 

     } 
    }); 
}

來源

2017-03-27 11:58:19

您應該實現OnTabChangeListener到TabActivity類而不是Tab的內容。

在你TabActivity實施OnTabChangeListener

然後設置偵聽器TabHost mTabHost.setOnTabChangedListener(this);

實施例1，

@Override 
public void onTabChanged(String tabId) { 
    Log.i("selected tab ", tabId); 

}

例2

public class HelloTabWidget extends TabActivity implements OnTabChangeListener{ 

private TabHost mTabHost; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    Resources res = getResources(); 
    TabHost tabHost = getTabHost(); 
    TabHost.TabSpec spec; 
    Intent intent; 
    mTabHost = getTabHost(); 


    intent = new Intent().setClass(this, BarActivity.class); 
    spec = tabHost.newTabSpec("Name").setIndicator("Name",res.getDrawable(R.drawable.ic_tab_name)).setContent(intent); 
    tabHost.addTab(spec); 

    intent = new Intent().setClass(this, CityActivity.class); 
    spec = tabHost.newTabSpec("city").setIndicator("City",res.getDrawable(R.drawable.ic_tab_city)).setContent(intent); 
    tabHost.addTab(spec); 

    intent = new Intent().setClass(this, MapsActivity.class); 
    spec = tabHost.newTabSpec("Country").setIndicator("Country",res.getDrawable(R.drawable.ic_tab_map)).setContent(intent); 
    tabHost.addTab(spec);   

    tabHost.setCurrentTab(2); 
    mTabHost.setOnTabChangedListener(this); 
} 

public void onTabChanged(String tabId) { 
    Toast.makeText(getApplicationContext(), "Selected Tab "+tabId, Toast.LENGTH_LONG).show(); 
    Log.i("selected tab index", "Current index - "+ mTabHost.getCurrentTab());  
}}

來源

2017-03-27 12:01:16

可以使用addOnTabSelectedListener方法。如果你只是想知道，如果標籤頁的變化，或者找出標籤位置被選中，使用：

mViewPager.setOnPageChangeListener(new OnPageChangeListener() { 
    public void onPageScrollStateChanged(int state) { 

    } 
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 

    } 

    public void onPageSelected(int position) { 

    } 
});

另外，如果你想跟蹤的標籤本身，你將不得不實施TabLayout.OnTabSelectedListener像這樣的：

public class HomeActivity extends AppCompatActivity implements TabLayout.OnTabSelectedListener

而這種方法添加到您的HomeActivity類：

@Override 
public void onTabSelected(TabLayout.Tab tab) { 

} 

@Override 
public void onTabUnselected(TabLayout.Tab tab) { 

} 

@Override 
public void onTabReselected(TabLayout.Tab tab) { 

}

來源

2017-03-27 12:01:51

依賴：

來源

2017-03-27 12:05:36

Tab變化監聽器android

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