簡單基類抽取+http服務+上拉載入下拉重新整理
阿新 • • 發佈：2018-12-10
//BaseActivity
public abstract class BaseActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(initLayout());
//初始化控制元件
initView();
//設定資料
getNews();
}
/**
* 設定佈局
*
* @return 佈局檔案
*/
protected abstract int initLayout();
/**
* 初始化控制元件
*/
protected abstract void initView();
/**
* 設定資料
*/
protected abstract void getNews();
}
//主Activity
public class MainActivity extends BaseActivity implements View.OnClickListener {
private ViewPager view_pager;
private ArrayList<Fragment> fragmentlist;
private Button btn_1,btn_2,btn_3,btn_4,btn_5;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//建立集合
fragmentlist = new ArrayList<>();
OneFragment oneFragment = new OneFragment();
TwoFragment twoFragment = new TwoFragment();
ThreeFragment threeFragment = new ThreeFragment();
FourFragment fourFragment = new FourFragment();
FiveFragment fiveFragment = new FiveFragment();
fragmentlist.add(oneFragment);
fragmentlist.add(twoFragment);
fragmentlist.add(threeFragment);
fragmentlist.add(fourFragment);
fragmentlist.add(fiveFragment);
//設定監聽
view_pager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) {
@Override
public Fragment getItem(int i) {
return fragmentlist.get(i);
}
@Override
public int getCount() {
return fragmentlist.size();
}
});
btn_1.setOnClickListener(this);
btn_2.setOnClickListener(this);
btn_3.setOnClickListener(this);
btn_4.setOnClickListener(this);
btn_5.setOnClickListener(this);
}
@Override
protected int initLayout() {
return R.layout.activity_main;
}
@Override
protected void initView() {
//初始化控制元件
view_pager = findViewById(R.id.view_pager);
btn_1 = findViewById(R.id.bnt_1);
btn_2=findViewById(R.id.bnt_2);
btn_3=findViewById(R.id.bnt_3);
btn_4=findViewById(R.id.bnt_4);
btn_5=findViewById(R.id.bnt_5);
//初始化資料
view_pager.setOffscreenPageLimit(4);
}
@Override
protected void getNews() {
//
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.bnt_1:
view_pager.setCurrentItem(0);
break;
case R.id.bnt_2:
view_pager.setCurrentItem(1);
break;
case R.id.bnt_3:
view_pager.setCurrentItem(2);
break;
case R.id.bnt_4:
view_pager.setCurrentItem(3);
break;
case R.id.bnt_5:
view_pager.setCurrentItem(4);
break;
}
}
}
//BaseFragment
public abstract class BaseFragment extends Fragment {
//view 建立完成回撥
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
initView(view);
getDatas();
}
abstract void initView(View view);
abstract void getDatas();
}
//ImageLoader
public class BaseApplication extends Application {
private File file;
private DiskCache diskCache;
@Override
public void onCreate() {
super.onCreate();
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
File rootSD = Environment.getExternalStorageDirectory();
file = new File(rootSD, "imagefile");
if (!file.exists()){
file.mkdirs();
}
}
try {
diskCache = new LruDiskCache(file, new Md5FileNameGenerator(), 50 * 1024 * 1024);
} catch (IOException e) {
e.printStackTrace();
}
BitmapDisplayer displayer = new RoundedBitmapDisplayer(10);
DisplayImageOptions options = new DisplayImageOptions.Builder()
.cacheInMemory(true)
.cacheOnDisk(true)
.bitmapConfig(Bitmap.Config.ARGB_4444)
.displayer(displayer)
.showImageForEmptyUri(R.mipmap.ic_launcher)
.showImageOnFail(R.mipmap.ic_launcher)
.showImageOnLoading(R.mipmap.ic_launcher)
.build();
ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this)
.diskCache(diskCache)
.memoryCache(new LruMemoryCache(12*1024*1024))
.threadPoolSize(3)
.defaultDisplayImageOptions(options)
.build();
ImageLoader.getInstance().init(configuration);
}
}
//http工具類
public class HttpUtil {
public static String getHttpUrlConnection(String urlString){
String result = "";
try {
URL url = new URL(urlString);
//連線
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
//優化
//請求型別
connection.setRequestMethod("GET");
connection.setDoInput(true);
connection.setDoOutput(false);
connection.setUseCaches(false);
//超時時間
connection.setConnectTimeout(3000);
connection.connect();
//獲取狀態碼 200 成功
if(connection.getResponseCode() == 200){
InputStream is = connection.getInputStream();
result = getInputStream(is);
}
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
private static String getInputStream(InputStream is) {
String result = "";
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int count = -1;
byte[] buffer = new byte[1024];
while ((count = is.read(buffer,0,buffer.length)) != -1){
baos.write(buffer,0,count);
baos.flush();
}
result = baos.toString();
baos.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
}
//fragment碎片
public class TwoFragment extends BaseFragment {
private ViewPager view_p;
private TabLayout tab_layout;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//初始化控制元件
View view = inflater.inflate(R.layout.fragment_two, container, false);
return view;
}
@Override
void initView(View view) {
view_p= view.findViewById(R.id.viewpager);
tab_layout=view.findViewById(R.id.tab_layout);
initVIewPager();
}
//初始DrawerLayout,ViewPager,Fragment
private void initVIewPager() {
ArrayList<Fragment> fragments = new ArrayList<>();
fragments.add(new ListFragment());
fragments.add(new ListtFragment());
MyPagerAdapter adapter = new MyPagerAdapter(getFragmentManager());
adapter.setFragments(fragments);
view_p.setAdapter(adapter);
//tabLayout指示器有幾個,建立幾個
tab_layout.addTab(tab_layout.newTab());
tab_layout.addTab(tab_layout.newTab());
//是tablayout和VIewPager
tab_layout.setupWithViewPager(view_p);
//給TabLayout指示器設定文字,萬物從0開始
tab_layout.getTabAt(0).setText("正在上映");
tab_layout.getTabAt(1).setText("即將上映");
}
@Override
void getDatas() {
//
}
}
//資料碎片
public class ListFragment extends BaseFragment {
public static final String NEWS_URL="http://172.17.8.100/movieApi/movie/v1/findHotMovieList?count=10&page=";
private int page=1;
private boolean isLoadMore= false;
public ArrayList<News.ResultBean> list;
public MyAdpater adpater;
private XListView list_one;
private Handler handler = new Handler(){};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.fragment_list, container, false);
return view;
}
@Override
void initView(View view) {
list_one=view.findViewById(R.id.list_viewone);
//建立集合
list=new ArrayList<>();
adpater=new MyAdpater(list,getActivity());
list_one.setAdapter(adpater);
//設定上拉載入下拉重新整理
list_one.setPullLoadEnable(true);
list_one.setPullRefreshEnable(true);
//設定Xlistview監聽事件
list_one.setXListViewListener(new XListView.IXListViewListener() {
@Override
public void onRefresh() {
if (page>1){
page--;
}else {
Toast.makeText(getActivity(),"給不了親更多資訊了!!!",Toast.LENGTH_LONG).show();
}
isLoadMore=false;
getDatas();
handler.postDelayed(new Runnable() {
@Override
public void run() {
list_one.stopRefresh();
}
},1000);
long l = System.currentTimeMillis();
Date date = new Date(l);
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm");
list_one.setRefreshTime(format.format(date));
}
@Override
public void onLoadMore() {
page ++;
isLoadMore = true;
getDatas();
News news = new News();
ArrayList<News.ResultBean> result = (ArrayList<News.ResultBean>) news.getResult();
if (result == null){
Toast.makeText(getActivity(),"沒有更多的資料了",Toast.LENGTH_SHORT).show();
}
handler.postDelayed(new Runnable() {
@Override
public void run() {
list_one.stopLoadMore();
}
},1000);
}
});
}
@Override
void getDatas() {
new AsyncTask<String,Integer,String>(){
@Override
protected String doInBackground(String... strings) {
return HttpUtil.getHttpUrlConnection(strings[0]);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
Gson gson = new Gson();
News news = gson.fromJson(s, News.class);
if (news != null){
ArrayList<News.ResultBean> result = (ArrayList<News.ResultBean>) news.getResult();
if (result != null){
if (!isLoadMore){
list.clear();
}
list.addAll(result);
adpater.notifyDataSetChanged();
}
}
}
}.execute(NEWS_URL+page);
}
}
//介面卡
public class MyAdpater extends BaseAdapter {
private ArrayList<News.ResultBean> list;
private Context context;
public MyAdpater(ArrayList<News.ResultBean> list, Context context) {
this.list = list;
this.context = context;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHouder houder =null;
if (convertView==null){
houder = new ViewHouder();
convertView=View.inflate(context ,R.layout.list_time,null);
houder.img_view=convertView.findViewById(R.id.img_view);
houder.name=convertView.findViewById(R.id.text_name);
houder.title=convertView.findViewById(R.id.text_title);
convertView.setTag(houder);
}else {
houder=(ViewHouder) convertView.getTag();
}
houder.name.setText(list.get(position).getName());
houder.title.setText(list.get(position).getSummary());
ImageLoader.getInstance().displayImage(list.get(position).getImageUrl(),houder.img_view);
return convertView;
}
class ViewHouder{
ImageView img_view;
TextView name;
TextView title;
}
}
public class MyPagerAdapter extends FragmentPagerAdapter {
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
private List<Fragment> mFragments;
//建立一個方法,接收外界傳來的Fragment的集合
public void setFragments(List<Fragment> fragments){
mFragments =fragments;
}
@Override
public Fragment getItem(int i) {
Fragment fragment = mFragments.get(i);
return fragment;
}
@Override
public int getCount() {
return mFragments.size();
}
}
//清單檔案
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.bawei.activity">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:name=".BaseApplication"
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=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".BaseActivity"></activity>
</application>
</manifest>