第三方的頻道管理
阿新 • • 發佈：2018-11-28
在清單檔案中註冊App
資料庫儲存資料
package com.example.yuekao.uitl;
import com.andy.library.AppApplication;
public class APP extends AppApplication {
}
依賴
implementation 'com.github.andyoom:draggrid:v1.1.4' implementation 'com.google.code.gson:gson:2.8.5' implementation 'com.android.support:design:28.0.0'
在專案中的build.gradle中新增
allprojects {
repositories {
google()
jcenter()
//只新增這一行
maven {url "https://jitpack.io"}
}
}
activity_main.xml//佈局不唯一 可根據自己的想法建立
<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <TextView android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="+" android:textSize="40dp" android:layout_marginRight="5dp" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toTopOf="@+id/viewpager" /> <android.support.design.widget.TabLayout android:id="@+id/tab" android:layout_width="0dp" android:layout_height="60dp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintRight_toLeftOf="@+id/text" app:tabMode="scrollable" /> <android.support.v4.view.ViewPager android:id="@+id/viewpager" android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintTop_toBottomOf="@+id/tab" /> </android.support.constraint.ConstraintLayout>
MainActivity頁面
public class MainActivity extends AppCompatActivity { private TextView textView; private TabLayout tabLayout; private ViewPager viewPager; private List<ChannelBean> channelBeans=new ArrayList<>(); private List<Fragment> fragments=new ArrayList<>(); private String jsonStr=""; private Gson gson; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = findViewById(R.id.text); tabLayout = findViewById(R.id.tab); viewPager = findViewById(R.id.viewpager); initData(); } private void initData() { channelBeans.add(new ChannelBean("熱點", true)); channelBeans.add(new ChannelBean("軍事", true)); channelBeans.add(new ChannelBean("八卦", true)); channelBeans.add(new ChannelBean("遊戲", true)); channelBeans.add(new ChannelBean("寵物", true)); channelBeans.add(new ChannelBean("汽車", true)); channelBeans.add(new ChannelBean("熱賣", true)); channelBeans.add(new ChannelBean("外賣", true)); channelBeans.add(new ChannelBean("條目1", true)); channelBeans.add(new ChannelBean("條目2", true)); channelBeans.add(new ChannelBean("條目3", false)); channelBeans.add(new ChannelBean("條目4", false)); channelBeans.add(new ChannelBean("條目5", false)); channelBeans.add(new ChannelBean("條目6", false)); channelBeans.add(new ChannelBean("條目7", false)); channelBeans.add(new ChannelBean("條目8", false)); fragments.add(new AFragment()); fragments.add(new BFragment()); fragments.add(new CFragment()); fragments.add(new BFragment()); fragments.add(new AFragment()); fragments.add(new BFragment()); fragments.add(new CFragment()); fragments.add(new BFragment()); fragments.add(new CFragment()); fragments.add(new AFragment()); fragments.add(new BFragment()); fragments.add(new AFragment()); fragments.add(new AFragment()); fragments.add(new AFragment()); fragments.add(new AFragment()); fragments.add(new AFragment()); for(int i=0;i<channelBeans.size();i++){ if(channelBeans.get(i).isSelect()){ tabLayout.addTab(tabLayout.newTab().setText(channelBeans.get(i).getName())); } } //viewpager設定介面卡 viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) { @Override public Fragment getItem(int i) { return fragments.get(i); } @Override public int getCount() { int count=0;//返回選中的條目數量 for(int i=0;i<channelBeans.size();i++){ if(channelBeans.get(i).isSelect()){ count++; } } return count; } @Nullable @Override public CharSequence getPageTitle(int position) { return channelBeans.get(position).getName(); } }); tabLayout.setupWithViewPager(viewPager); textView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Gson gson=new Gson(); String jsonArray = gson.toJson(channelBeans); Intent intent = new Intent(MainActivity.this,ChannelActivity.class); intent.putExtra(RESULT_JSON_KEY, jsonArray); startActivityForResult(intent, REQUEST_CODE); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if(requestCode==ChannelActivity.REQUEST_CODE&&resultCode==ChannelActivity.RESULT_CODE){ //得到欄目管理的結果 jsonStr=data.getStringExtra(ChannelActivity.RESULT_JSON_KEY); tabLayout.removeAllTabs();//清空之前所有的欄目 gson=new Gson();//進行gson解析 Type type=new TypeToken<List<ChannelBean>>(){}.getType(); channelBeans=gson.fromJson(jsonStr,type); //迴圈存入 for(int i=0;i<channelBeans.size();i++){ if(channelBeans.get(i).isSelect()){ try { tabLayout.addTab(tabLayout.newTab().setText(channelBeans.get(i).getName())); }catch (Exception e){ } } } //viewpager介面卡重新整理 viewPager.getAdapter().notifyDataSetChanged(); } } }