如何在Android中制作可滚动标签? [英] How to make scrollable tab in Android?

问题描述

我有9个标签，但处于填充模式.我想使这些标签可滚动.但是我不知道把戏.我尝试了很多方法，但还是没有.

I have 9 tab but in fill mode. I want to make these thabs scrollable. But i dont know the trick. I tried many methods but still nothing.

我的活动:

    package com.bani.fragment2;

import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.WindowManager;


public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
   final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    toolbar.setTitle("Fragment 1");
    setSupportActionBar(toolbar);


    TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
    tabLayout.addTab(tabLayout.newTab().setText("Tab 1"));
    tabLayout.addTab(tabLayout.newTab().setText("Tab 2"));
    tabLayout.addTab(tabLayout.newTab().setText("Tab 3"));
    tabLayout.addTab(tabLayout.newTab().setText("Tab 4"));
    tabLayout.addTab(tabLayout.newTab().setText("Tab 5"));
    tabLayout.addTab(tabLayout.newTab().setText("Tab 6"));
    tabLayout.addTab(tabLayout.newTab().setText("Tab 7"));
    tabLayout.addTab(tabLayout.newTab().setText("Tab 8"));
    tabLayout.addTab(tabLayout.newTab().setText("Tab 9"));
    tabLayout.setTabGravity(TabLayout.GRAVITY_CENTER);

    final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
    final PagerAdapter adapter = new PageAdapter(getSupportFragmentManager(), tabLayout.getTabCount());
    viewPager.setAdapter(adapter);
    viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
    tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener()     {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            switch(tab.getPosition()) {
                case 0:
                    viewPager.setCurrentItem(0);
                    toolbar.setTitle("Fragment 1");
                    break;
                case 1:
                    viewPager.setCurrentItem(1);
                    toolbar.setTitle("Fragment 2");
                    break;
                case 2:
                    viewPager.setCurrentItem(2);
                    toolbar.setTitle("Fragment 3");
                    break;
                case 3:
                    viewPager.setCurrentItem(3);
                    toolbar.setTitle("Fragment 4");
                    break;
                case 4:
                    viewPager.setCurrentItem(4);
                    toolbar.setTitle("Fragment 5");
                    break;
                case 5:
                    viewPager.setCurrentItem(5);
                    toolbar.setTitle("Fragment 6");
                    break;
                case 6:
                    viewPager.setCurrentItem(6);
                    toolbar.setTitle("Fragment 7");
                    break;
                case 7:
                    viewPager.setCurrentItem(7);
                    toolbar.setTitle("Fragment 8");
                    break;
                case 8:
                    viewPager.setCurrentItem(8);
                    toolbar.setTitle("Fragment 9");
                    break;
                default:

                    viewPager.setCurrentItem(tab.getPosition());
                    toolbar.setTitle("Fragment 1");
                    break;
            }



        }


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

        }

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

        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}
}

这是我使用Tab的布局:

And this is my layout with Tab:

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:background="?attr/colorPrimary"
    android:elevation="6dp"
    android:minHeight="?attr/actionBarSize"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

<android.support.design.widget.TabLayout
    android:id="@+id/tab_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/toolbar"
    android:background="?attr/colorPrimary"
    android:elevation="6dp"
    android:minHeight="?attr/actionBarSize"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>

<android.support.v4.view.ViewPager
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:layout_below="@id/tab_layout"/>

</RelativeLayout>

请帮助我解决问题，我尝试通过其他方式将制表符重力设置为MODE_SCROLLABLE，但仍然对我不起作用.

Please help me to solve my problem, I tried to set tab gravity to MODE_SCROLLABLE and other way but still not working for me.

推荐答案

我试图将制表符重力设置为MODE_SCROLLABLE

I tried to set tab gravity to MODE_SCROLLABLE

那不是重力值.那是要传递给TabLayout(tabs.setTabMode(TabLayout.MODE_SCROLLABLE))上的setTabMode()的值.

That is not a gravity value. That is a value to be passed to setTabMode() on the TabLayout (tabs.setTabMode(TabLayout.MODE_SCROLLABLE)).

This sample project from this book has an activity that toggles between three fixed tabs and ten scrollable tabs:

/***
  Copyright (c) 2012-15 CommonsWare, LLC
  Licensed under the Apache License, Version 2.0 (the "License"); you may not
  use this file except in compliance with the License. You may obtain a copy
  of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
  by applicable law or agreed to in writing, software distributed under the
  License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
  OF ANY KIND, either express or implied. See the License for the specific
  language governing permissions and limitations under the License.

  From _The Busy Coder's Guide to Android Development_
    https://commonsware.com/Android
 */

package com.commonsware.android.tablayout;

import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends AppCompatActivity {
  private SampleAdapter adapter;
  private TabLayout tabs;

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

    ViewPager pager=(ViewPager)findViewById(R.id.pager);

    adapter=new SampleAdapter(this, getSupportFragmentManager());
    pager.setAdapter(adapter);

    tabs=(TabLayout)findViewById(R.id.tabs);
    tabs.setupWithViewPager(pager);
    tabs.setTabMode(TabLayout.MODE_FIXED);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.actions, menu);

    return(super.onCreateOptionsMenu(menu));
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId()==R.id.fixed) {
      item.setChecked(!item.isChecked());

      if (item.isChecked()) {
        adapter.setPageCount(3);
        tabs.setTabMode(TabLayout.MODE_FIXED);
      }
      else {
        adapter.setPageCount(10);
        tabs.setTabMode(TabLayout.MODE_SCROLLABLE);
      }

      adapter.notifyDataSetChanged();
      tabs.setTabsFromPagerAdapter(adapter);

      return(true);
    }

    return(super.onOptionsItemSelected(item));
  }
}

这篇关于如何在Android中制作可滚动标签?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！