Android 如何使用“设计库”选项卡布局更改工具栏标题?
我正在使用设计库支持TableAyout,我正在尝试在按下Tab或滑动ViewPager时更改工具栏的标题。但到目前为止还无法获得任何成功。这是以下代码:-Android 如何使用“设计库”选项卡布局更改工具栏标题?,android,material-design,android-design-library,android-tablayout,Android,Material Design,Android Design Library,Android Tablayout,我正在使用设计库支持TableAyout,我正在尝试在按下Tab或滑动ViewPager时更改工具栏的标题。但到目前为止还无法获得任何成功。这是以下代码:- public class ActivityHomePage extends AppCompatActivity { private TabLayout tabLayout; private ViewPager viewPager; Toolbar toolbar; DesignDemoPagerAdapter
public class ActivityHomePage extends AppCompatActivity {
private TabLayout tabLayout;
private ViewPager viewPager;
Toolbar toolbar;
DesignDemoPagerAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_homepage);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
// viewPager.getAdapter().getPageTitle();
tabLayout = (TabLayout) findViewById(R.id.tablayout);
tabLayout.setupWithViewPager(viewPager);
setupTabIcons();
}
private int[] tabIcons = {
R.drawable.ic_action_star,
R.drawable.ic_action_heart,
R.drawable.ic_action_square
};
private void setupViewPager(ViewPager viewPager) {
adapter = new DesignDemoPagerAdapter(getSupportFragmentManager());
adapter.addFrag(new FragmentStar(), "star");
adapter.addFrag(new FragmentHeart(), "heart");
adapter.addFrag(new FragmentSquare(), "square");
viewPager.setAdapter(adapter);
}
@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_main, menu);
return true;
}
private void setupTabIcons() {
tabLayout.getTabAt(0).setIcon(tabIcons[0]);
tabLayout.getTabAt(1).setIcon(tabIcons[1]);
tabLayout.getTabAt(2).setIcon(tabIcons[2]);
}
@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();
switch (id) {
case android.R.id.home:
mDrawerLayout.openDrawer(GravityCompat.START);
return true;
case R.id.action_settings:
return true;
}
return super.onOptionsItemSelected(item);
}
class DesignDemoPagerAdapter extends FragmentStatePagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public DesignDemoPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
public void addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
@Override
public CharSequence getPageTitle(int position) {
return null;
}
}
}
公共类活动主页扩展了AppCompatActivity{
私人摊位摊位;
私人视页机视页机;
工具栏;
设计雷达适配器;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_主页);
toolbar=(toolbar)findviewbyd(R.id.toolbar);
设置支持操作栏(工具栏);
getSupportActionBar().setDisplayShowTitleEnabled(false);
viewPager=(viewPager)findViewById(R.id.viewPager);
设置viewPager(viewPager);
//viewPager.getAdapter().getPageTitle();
tabLayout=(tabLayout)findViewById(R.id.tabLayout);
tabLayout.setupWithViewPager(viewPager);
setupTabIcons();
}
私有int[]选项卡图标={
R.drawable.ic_action_star,
R.drawable.ic_action_heart,
R.drawable.ic\u action\u square
};
专用无效设置ViewPager(ViewPager ViewPager){
适配器=新设计DemoPageRadapter(getSupportFragmentManager());
adapter.addFrag(新的FragmentStar(),“star”);
adapter.addFrag(newfragmentheart(),“heart”);
adapter.addFrag(新的FragmentSquare(),“square”);
viewPager.setAdapter(适配器);
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(右菜单菜单菜单主菜单);
返回true;
}
私有void setupTabIcons(){
tabLayout.getTabAt(0).setIcon(tabIcons[0]);
tabLayout.getTabAt(1).setIcon(tabIcons[1]);
tabLayout.getTabAt(2).setIcon(tabIcons[2]);
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击,只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId();
开关(id){
案例android.R.id.home:
mDrawerLayout.openDrawer(重力compat.START);
返回true;
案例R.id.action\u设置:
返回true;
}
返回super.onOptionsItemSelected(项目);
}
类DesignDemoPagerAdapter扩展FragmentStatePagerAdapter{
私有最终列表MFFragmentList=new ArrayList();
私有最终列表MFFragmentTitleList=new ArrayList();
公共设计DemoPageRadapter(碎片管理器){
高级经理;
}
@凌驾
公共片段getItem(int位置){
返回MFFragmentList.get(位置);
}
@凌驾
public int getCount(){
返回MFFragmentList.size();
}
public void addFrag(片段、字符串标题){
添加(片段);
MFFragmentTitleList.add(标题);
}
@凌驾
公共字符序列getPageTitle(int位置){
返回null;
}
}
}
最后,我终于能够做到这一点,可能对某些人有所帮助,因此以下是上述问题的答案:-
/** Tab & PageViewer Controller**/
tabLayout = (TabLayout) findViewById(R.id.tablayout);
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_action_star));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_action_heart));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_action_square));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
// setupTabIcons();
viewPager = (ViewPager) findViewById(R.id.viewpager);
pAdapter = new PagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(pAdapter);
toolbar.setTitle("Same Page");
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 Star");
break;
case 1:
viewPager.setCurrentItem(1);
toolbar.setTitle("Fragment Heart");
break;
case 2:
viewPager.setCurrentItem(2);
toolbar.setTitle("Fragment Squae");
break;
default:
viewPager.setCurrentItem(tab.getPosition());
toolbar.setTitle("Fragment Star");
break;
}
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
/** **/
public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
FragmentStar tab0 = new FragmentStar();
return tab0;
case 1:
FragmentHeart tab1 = new FragmentHeart();
return tab1;
case 2:
FragmentSquare tab2 = new FragmentSquare();
return tab2;
default:
return null;
}
}
@Override
public int getCount() {
return mNumOfTabs;
}
}
以防有人来这里寻求帮助。 这是@Khanna的代码的更简单更好的版本 根据选项卡名称初始化类中的数组 字符序列标题[]={“星”、“心”、“方”} 现在就用吧 setTitle(标题[tab.getPosition()]) 这是经过编辑的代码
CharSequence titles[] = {"Star","Heart", "Square"};
/** Tab & PageViewer Controller**/
tabLayout = (TabLayout) findViewById(R.id.tablayout);
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_action_star));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_action_heart));
tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_action_square));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
// setupTabIcons();
viewPager = (ViewPager) findViewById(R.id.viewpager);
pAdapter = new PagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(pAdapter);
toolbar.setTitle("Same Page");
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(0);
//Now just set title using your array
toolbar.setTitle(titles[tab.getPosition()]);
}
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
public class PagerAdapter extends FragmentStatePagerAdapter{
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
FragmentStar tab0 = new FragmentStar();
return tab0;
case 1:
FragmentHeart tab1 = new FragmentHeart();
return tab1;
case 2:
FragmentSquare tab2 = new FragmentSquare();
return tab2;
default:
return null;
}
}
@Override
public int getCount() {
return mNumOfTabs;
}
}
由于setOnAbsSelectedListener已被弃用,因此您可以像下面的示例一样使用它
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
switch (tab.getPosition()) {
case 0:
viewPager.setCurrentItem(0);
getSupportActionBar().setTitle("Recipes");
break;
case 1:
viewPager.setCurrentItem(1);
getSupportActionBar().setTitle("Categories");
break;
case 2:
viewPager.setCurrentItem(2);
getSupportActionBar().setTitle("Favorites");
break;
default:
viewPager.setCurrentItem(tab.getPosition());
getSupportActionBar().setTitle("Cook Book");
break;
}
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
在代码中,您在哪里更改标题?调用
setTitle()
将更改活动中工具栏的标题。对我无效-不更改标题/。总之,我在studio中插入了一个错误,因为viewPager应该声明为finalTried,这次我注意到您使用了toolbar.setTitle()。这导致应用程序名称被更改,而不是选项卡标题。现在它可以工作了。我不得不更改您的代码以使用tabLayout.getTabAt(position.setText(“Fragment”+position”)使其工作。谢谢你指出了正确的方向。我在发表评论时就这样做了,但由于某种原因,我发现它并没有增加我的评论。我现在又试了一次。