側拉框,fragment展示資料
Mainactivity
package com.example.a24476.myapplication.ui.activity;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.MenuItem;
import com.example.a24476.myapplication.ui.adapter.MainPageAdapter;
import com.example.a24476.myapplication.ui.fragment.LeftFragment;
import com.example.a24476.myapplication.R;
public class MainActivity extends AppCompatActivity { private DrawerLayout drawerLayout; private ActionBarDrawerToggle toggle; private ViewPager contents; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //為空才新增Fragment: 左邊選單s if(savedInstanceState == null) { getSupportFragmentManager().beginTransaction() .add(R.id.left_drawer, new LeftFragment()) .commit(); } //初始化View initView(); //載入資料 initData(); } private void initData() { } private void initView() { //允許標題欄展示左邊icon getSupportActionBar().setDisplayHomeAsUpEnabled(true); drawerLayout = findViewById(R.id.drawer); //actionbar 和 DrawerLahyout中間人, 把中間人創建出來 toggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.open_drawer, R.string.close_drawer); drawerLayout.addDrawerListener(toggle); toggle.syncState(); contents = findViewById(R.id.contents); //繫結adapter contents.setAdapter(new MainPageAdapter(getSupportFragmentManager())); TabLayout tabLayout = findViewById(R.id.bottom_indicator); //建立底部三個tab //tabLayout.addTab(); //tabLayout.addTab(); //tabLayout.addTab(); //1 adapter裡返回標題 //2 根據ViewPager設定TabLayout tabLayout.setupWithViewPager(contents); //tabLayout.getTabAt(0).setText("首頁"); //tabLayout.getTabAt(1).setText("視訊"); //tabLayout.getTabAt(2).setText("我的"); //tabLayout.getTabAt(0).setIcon(); } //顯示具體頁面 0 - 3 public void showPage(int position) { contents.setCurrentItem(position); drawerLayout.closeDrawer(Gravity.START); } @Override public boolean onOptionsItemSelected(MenuItem item) { if(toggle.onOptionsItemSelected(item)) { return true; } return super.onOptionsItemSelected(item); } }
HomePageAdapter
package com.example.a24476.myapplication.ui.adapter;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import com.example.a24476.myapplication.ui.fragment.BaseFragment;
import com.example.a24476.myapplication.ui.fragment.RecommendFragment;
public class HomePageAdapter extends FragmentPagerAdapter {
private String[] pageNames = new String[]{"推薦", "小視訊", "視訊", "熱點", "北京", "娛樂", "財經", "軍事"};
public HomePageAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int i) {
switch (i) {
case 0:
return new RecommendFragment();
default:
return new BaseFragment();
}
}
@Nullable
@Override
public CharSequence getPageTitle(int position) {
return pageNames[position];
}
@Override
public int getCount() {
return pageNames.length;
}
}
LeftMenuadapter
package com.example.a24476.myapplication.ui.adapter;
import android.content.Context;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.a24476.myapplication.R;
import javax.xml.validation.TypeInfoProvider;
public class LeftMenuAdapter extends BaseAdapter {
private String[] menus = new String[]{
"首頁", "視訊", "我的"
};
private Context mContext;
public LeftMenuAdapter(Context mContext) {
this.mContext = mContext;
}
@Override
public int getCount() {
return menus.length + 1;
}
private final int ITEM_COUTN = 2;
private final int IMAGE_TYPE = 0;
private final int TEXT_TYPE = 1;
@Override
public int getViewTypeCount() {
return ITEM_COUTN;
}
@Override
public int getItemViewType(int position) {
return position == 0 ? IMAGE_TYPE : TEXT_TYPE;
}
@Override
public String getItem(int position) {
//預防postion == 0的情況
if (position == 0) {
return null;
}
return menus[position - 1];
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(
getItemViewType(position) == IMAGE_TYPE ? R.layout.menu_image_item : R.layout.menu_text_item
, parent, false);
viewHolder = new ViewHolder(convertView);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
//
if (getItemViewType(position) == TEXT_TYPE) {
viewHolder.bindData(getItem(position));
}
//!!!!!!!!!!!!!!!!!!!!!!!!!!
return convertView;
}
class ViewHolder {
ImageView imageView;
TextView textView;
public ViewHolder(View itemView) {
imageView = itemView.findViewById(R.id.icon);
textView = itemView.findViewById(R.id.text);
itemView.setTag(this);
}
public void bindData(String text) {
textView.setText(text);
}
public void displayIcon() {
}
}
}
Mainpageadapter
package com.example.a24476.myapplication.ui.adapter;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import com.example.a24476.myapplication.ui.fragment.HomeFragment;
import com.example.a24476.myapplication.ui.fragment.MineFragment;
import com.example.a24476.myapplication.ui.fragment.VideoFragment;
import java.util.ArrayList;
import java.util.List;
public class MainPageAdapter extends FragmentPagerAdapter {
private String[] menus = new String[]{
"首頁", "視訊", "我的"
};
public MainPageAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int i) {
//使用集合存起來,不重複建立Fragment
/*List<Fragment> fragmentList = new ArrayList<>();
fragmentList.add(new HomeFragment());
fragmentList.add(new VideoFragment());
fragmentList.add(new MineFragment());
return fragmentList.get(i);*/
//FragmentPagerAdapter
//show hide
//add remove
switch (i) {
case 0:
return new HomeFragment();
case 1:
return new VideoFragment();
case 2:
return new MineFragment();
default:
return new Fragment();
}
}
@Nullable
@Override
public CharSequence getPageTitle(int position) {
return menus[position];
}
@Override
public int getCount() {
return menus.length;
}
}
Fragment自佈局
package com.example.a24476.myapplication.ui.fragment;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class BaseFragment extends Fragment {
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
TextView textView = new TextView(getActivity());
textView.setText("頁面");
return textView;
}
}
HoneFragment
package com.example.a24476.myapplication.ui.fragment;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TableLayout;
import android.widget.TextView;
import com.example.a24476.myapplication.R;
import com.example.a24476.myapplication.ui.adapter.HomePageAdapter;
public class HomeFragment extends Fragment {
private TabLayout tabLayout;
private ViewPager contents;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_home, container, false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
tabLayout = view.findViewById(R.id.top_indicator);
contents = view.findViewById(R.id.contents);
//
//Fragment巢狀Fragment,使用getChildFragmentManager()
//getFragmentManager();
contents.setAdapter(new HomePageAdapter(getChildFragmentManager()));
//TableLayout
tabLayout.setupWithViewPager(contents);
//FragmentActivity; Fragment 3.0//封裝了Fragment, 讓你在低版本Android上能用
//
//AppCompatActivity;//封閉了ActionBar
}
}
Fragment佈局
package com.example.a24476.myapplication.ui.fragment;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import com.example.a24476.myapplication.R;
import com.example.a24476.myapplication.ui.activity.MainActivity;
import com.example.a24476.myapplication.ui.adapter.LeftMenuAdapter;
public class LeftFragment extends Fragment {
private ListView menus;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_left_drawer, container, false);
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
menus = view.findViewById(R.id.menus);
menus.setAdapter(new LeftMenuAdapter(getActivity()));
menus.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//圖片 不做跳轉
if(position == 0) {
return;
}
//切換頁面
((MainActivity)getActivity()).showPage(position - 1);
}
});
}
}
清單檔案註冊
<?xml version="1.0" encoding="utf-8"?><application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".ui.activity.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
佈局檔案主佈局
<?xml version="1.0" encoding="utf-8"?><android.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/drawer"
xmlns:tools=“http://schemas.android.com/tools”
android:layout_width=“match_parent”
android:layout_height=“match_parent”
tools:context=".ui.activity.MainActivity">
<!--
內容佈局
選單佈局: layout_gravity
-->
<!--
match_parent 根據父佈局適應
wrap_content 根據內容適應
-->
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.TabLayout
android:id="@+id/bottom_indicator"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
app:tabTextColor="@color/colorPrimary"
app:tabSelectedTextColor="@color/colorAccent"
app:tabIndicatorColor="@android:color/transparent"
app:tabIndicatorHeight="1dp"
/>
<!-- app:tabTextAppearance="" -->
<android.support.v4.view.ViewPager
android:id="@+id/contents"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@id/bottom_indicator"/>
</RelativeLayout>
<FrameLayout
android:id="@+id/left_drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#ffffff" />
</android.support.v4.widget.DrawerLayout>
Fragment_home
<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android=“http://schemas.android.com/apk/res/android”
android:layout_width=“match_parent”
android:layout_height=“match_parent”
xmlns:app=“http://schemas.android.com/apk/res-auto”>
<!--
填充是 0dp,並根據約束來做
-->
<android.support.design.widget.TabLayout
android:id="@+id/top_indicator"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:tabMode="scrollable"
/>
<android.support.v4.view.ViewPager
android:id="@+id/contents"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/top_indicator"
app:layout_constraintBottom_toBottomOf="parent"/>
</android.support.constraint.ConstraintLayout>