android fragment学习5--fragment扩展 TabLayout非自定义
16lz
2021-12-04
Activity
/** * Created by steven on 2017/10/29 0029. */public class FloatActionBarActivity extends BaseActivity { private DrawerLayout mRootDl; private LinearLayout mMenuLl; private TabLayout mIndicatorTl; private ViewPager mContentVp; private List tabIndicators; private List tabFragments; private ContentPagerAdapter contentAdapter; private ActionBarDrawerToggle drawerToggle; public static void startActivity(Context context ){ Intent intent = new Intent(context, FloatActionBarActivity.class); context.startActivity(intent); } @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_fab); mIndicatorTl = (TabLayout) findViewById(R.id.tl_indicator); mContentVp = (ViewPager) findViewById(R.id.vp_content); initDrawer(); initContent(); initTab(); } private void initDrawer() { mRootDl = (DrawerLayout) findViewById(R.id.dl_root); drawerToggle = new ActionBarDrawerToggle(this, mRootDl, R.string.app_name, R.string.app_name); mRootDl.setDrawerListener(drawerToggle); mMenuLl = (LinearLayout) findViewById(R.id.ll_menu); DrawerLayout.LayoutParams layoutParams = (DrawerLayout.LayoutParams) mMenuLl.getLayoutParams(); layoutParams.width = getScreenSize()[0]/4*3; getSupportActionBar().setHomeButtonEnabled(true); getSupportActionBar().setDisplayHomeAsUpEnabled(true); } public int[] getScreenSize(){ int screenSize[] = new int[2]; DisplayMetrics displayMetrics = new DisplayMetrics(); this.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics); screenSize[0] = displayMetrics.widthPixels; screenSize[1] = displayMetrics.heightPixels; return screenSize; } public void onClickFab(View v){ Snackbar.make(findViewById(R.id.fab_add), "Show The Snackbar", Snackbar.LENGTH_SHORT).show(); } private void initTab(){ mIndicatorTl.setTabMode(TabLayout.MODE_FIXED); mIndicatorTl.setTabTextColors(ContextCompat.getColor(this, R.color.gray), ContextCompat.getColor(this, R.color.white)); mIndicatorTl.setSelectedTabIndicatorColor(ContextCompat.getColor(this, R.color.white)); ViewCompat.setElevation(mIndicatorTl, 10); mIndicatorTl.setupWithViewPager(mContentVp); } private void initContent(){ tabIndicators = new ArrayList<>(); for (int i = 0; i < 3; i++) { tabIndicators.add("Tab " + i); } tabFragments = new ArrayList<>(); for (String s : tabIndicators) { tabFragments.add(TabListFragment.newInstance(s)); } contentAdapter = new ContentPagerAdapter(getSupportFragmentManager()); mContentVp.setAdapter(contentAdapter); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_samples, menu); return true; } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); drawerToggle.onConfigurationChanged(newConfig); } @Override public void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); drawerToggle.syncState(); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (drawerToggle.onOptionsItemSelected(item)){ return true; } return super.onOptionsItemSelected(item); } class ContentPagerAdapter extends FragmentPagerAdapter { public ContentPagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { return tabFragments.get(position); } @Override public int getCount() { return tabIndicators.size(); } @Override public CharSequence getPageTitle(int position) { return tabIndicators.get(position); } }} 布局文件
<?xml version="1.0" encoding="utf-8"?>.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/dl_root" android:layout_width="match_parent" android:layout_height="match_parent"> .support.design.widget.CoordinatorLayout android:layout_width="match_parent" android:layout_height="match_parent"> .support.design.widget.AppBarLayout android:id="@+id/appbar" android:layout_width="match_parent" android:layout_height="wrap_content"> "@layout/include_toolbar" /> .support.design.widget.TabLayout android:id="@+id/tl_indicator" android:layout_width="match_parent" android:layout_height="wrap_content" /> .support.design.widget.AppBarLayout> .support.v4.view.ViewPager android:id="@+id/vp_content" android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior" /> "bottom" android:layout_width="wrap_content" android:layout_height="wrap_content"> .support.design.widget.CoordinatorLayout> "@+id/ll_menu" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="start" android:orientation="vertical" android:gravity="center" android:background="@color/white"> "wrap_content" android:layout_height="wrap_content" android:text="Menu Content" android:textColor="@color/black" android:textSize="@dimen/sp_16"/> .support.v4.widget.DrawerLayout> 子fragment
public class TabListFragment extends Fragment implements AdapterView.OnItemClickListener{ private static final String EXTRA_CONTENT = "content"; private ListView mContentLv; public static TabListFragment newInstance(String content){ Bundle arguments = new Bundle(); arguments.putString(EXTRA_CONTENT, content); TabListFragment tabContentFragment = new TabListFragment(); tabContentFragment.setArguments(arguments); return tabContentFragment; } @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View contentView = inflater.inflate(R.layout.fragment_tab_list, null); mContentLv = (ListView) contentView.findViewById(R.id.lv_content); mContentLv.setOnItemClickListener(this); ViewCompat.setNestedScrollingEnabled(mContentLv, true); mContentLv.setAdapter(new ContentAdapter()); return contentView; } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // TODO } private class ContentAdapter extends BaseAdapter{ @Override public int getCount() { return 10; } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return 0; } @Override public View getView(final int position, View convertView, ViewGroup parent) { View contentView = LayoutInflater.from(getActivity()).inflate(R.layout.item_simple_list_2, null); ImageView coverIv = (ImageView) contentView.findViewById(R.id.iv_cover); coverIv.setImageResource(getResources().getIdentifier("ic_palette_0"+position%4, "mipmap", getActivity().getPackageName())); contentView.findViewById(R.id.cv_content).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent detailIntent = new Intent(getActivity(), PaletteDetailActivity.class); detailIntent.putExtra(PaletteDetailActivity.EXTRA_INDEX, position); startActivity(detailIntent); } }); return contentView; } }}小结
这个demo跟fragment4一样的，都是tabLayout和viewpager,因为它使用到了 android.support.design.widget.CoordinatorLayout，可伸缩扩展的布局，所以拿出来，方便以后用到。这样的布局现新的app是经常用到的。用法，代码的含义在fragment4中有提到。
android fragment学习6–其他种类的tab
https://blog.csdn.net/qq_26296197/article/details/81147007
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