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android 应用架构随笔六(Loading加载页面)

时间:2016-11-19 12:10:46      阅读:236      评论:0      收藏:0      [点我收藏+]

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import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import com.heima.googleplay.R;
import com.heima.googleplay.manager.ThreadManager;
import com.heima.googleplay.utils.UIUtils;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.FrameLayout;
/**
 * 
 * 
 * ============================================================
 **/
public abstract class LoadingPage extends FrameLayout {
    //默认状态
    private final int UN_LOADING  =  1;
    //加载状态
    private final int LOADING = 2;
    //加载失败状态
    private final int ERROR = 3;
    //加载成功。然后服务器没有返回数据
    private final int EMPTY = 4;
    //加载成功的状态
    private final int SUCCESS = 5;
    //用来记录某种状态
    private int mState;
    private View mLoadingView;
    private View mErrorView;
    private View mEmptyView;

    private View mSuccessView;
    public LoadingPage(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    private void init() {
        //首先赋值
        mState = UN_LOADING;
        
        mLoadingView = createLoadingView();
        
        if(null != mLoadingView){
            addView(mLoadingView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        }
        
        mErrorView = createErrorView();
        
        if(null != mErrorView){
            addView(mErrorView,new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        }
        
        mEmptyView = createEmptyView();
        
        if(null != mEmptyView ){
            addView(mEmptyView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        }
        //成功页面根据业务不同页面将不同,所以在此无法添加统一界面
     //只能在主线程中展示出来 showSafePage(); }
  
private void showSafePage() { UIUtils.runInMainThread(new Runnable() { @Override public void run() { showPage(); } }); }
  //三种页面已经添加到FrameLayout中,通过显示和隐藏来控制显示那个
protected void showPage() { if(null != mLoadingView){ mLoadingView.setVisibility(mState == UN_LOADING || mState == LOADING ? View.VISIBLE : View.INVISIBLE); } if(null != mErrorView){ mErrorView.setVisibility(mState == ERROR ? View.VISIBLE : View.INVISIBLE); } if(null != mEmptyView){ mEmptyView.setVisibility(mState == EMPTY ? View.VISIBLE : View.INVISIBLE); } if(null == mSuccessView && mState == SUCCESS ){ mSuccessView = createSuccessView(); addView(mSuccessView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); } if(null != mSuccessView){ mSuccessView.setVisibility(mState == SUCCESS ? View.VISIBLE : View.INVISIBLE); } } public abstract View createSuccessView();//创建成功后显示的业务界面 private View createEmptyView() { // TODO Auto-generated method stub return UIUtils.inflate(R.layout.loading_page_empty); } private View createErrorView() { // TODO Auto-generated method stub return UIUtils.inflate(R.layout.loading_page_error); } private View createLoadingView() { // TODO Auto-generated method stub return UIUtils.inflate(R.layout.loading_page_loading); } public LoadingPage(Context context, AttributeSet attrs) { super(context, attrs); init(); } public LoadingPage(Context context) { super(context); init(); } // //加载失败状态 // private final int ERROR = 3; // //加载成功。然后服务器没有返回数据 // private final int EMPTY = 4; // //加载成功的状态 // private final int SUCCESS = 5; public enum LoadResult{ ERROR(3),EMPTY(4),SUCCESS(5); int value ; LoadResult(int value){ this.value = value; } public int getValue() { return value; } }
  //利用线程池
private class LoadTask implements Runnable{ @Override public void run() { final LoadResult result = Load(); UIUtils.runInMainThread(new Runnable() { @Override public void run() { mState = result.getValue(); showPage(); } }); } } public void show() { if(mState == ERROR || mState == EMPTY){ mState = UN_LOADING; } if(mState == UN_LOADING){ mState = LOADING; LoadTask task = new LoadTask(); ThreadManager.getLongPool().execute(task); // ExecutorService service = Executors.newFixedThreadPool(3); // LoadTask task = new LoadTask(); // service.execute(task); } showSafePage();//加载完数据,在主线程中展示界面出来
}   
  
  //从服务器加载数据,返回加载状态(加载数据成功、失败?)
public abstract LoadResult Load() ; }

 

技术分享
import java.util.List;

import com.heima.googleplay.utils.UIUtils;
import com.heima.googleplay.utils.ViewUtils;
import com.heima.googleplay.widget.LoadingPage;
import com.heima.googleplay.widget.LoadingPage.LoadResult;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;

public abstract class BaseFragment extends Fragment {

    private LoadingPage mContentPage;
    
    
    
    //setContentView
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        //当前的view已经有了一个父亲。必须移除
        if(mContentPage == null){
            mContentPage = new LoadingPage(UIUtils.getContext()) {

                @Override
                public View createSuccessView() {
                    // TODO Auto-generated method stub
                    return BaseFragment.this.createSuccessView();
                }

                @Override
                public LoadResult Load() {
                    // TODO Auto-generated method stub
                    return BaseFragment.this.load();
                }
            };
        }else{
            ViewUtils.removeSelfFromParent(mContentPage);
        }
        
        return mContentPage;
    }
    /**
     * 检查服务器返回的json数据
     * @param object
     * @return
     */
    protected LoadResult chece(Object object) {
        if (object == null) {
            return LoadResult.ERROR;
        }
        if (object instanceof List) {
            List list = (List) object;
            if (list.size() == 0) {
                return LoadResult.EMPTY;
            }
        }

        return LoadResult.SUCCESS;
    }

    protected abstract LoadResult load();

    protected abstract View createSuccessView();

    //在MainActivity中调用
    public void show() {
        if (null != mContentPage) {
            mContentPage.show();
        }

    }

}
View Code
技术分享
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.Menu;

import com.heima.googleplay.fragment.AppFragment;
import com.heima.googleplay.fragment.BaseFragment;
import com.heima.googleplay.fragment.FragmentFactory;
import com.heima.googleplay.fragment.GameFragment;
import com.heima.googleplay.fragment.HomeFragment;
import com.heima.googleplay.utils.UIUtils;
import com.heima.googleplay.widget.PagerTab;

public class MainActivity extends BaseActivity implements OnPageChangeListener {


    private PagerTab mTabs;
    private ViewPager mPager;


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

     private class MainAdapter extends FragmentStatePagerAdapter{

        private String[] tab_names;
        private BaseFragment fragment;

        public MainAdapter(FragmentManager fm) {
            super(fm);
            tab_names = UIUtils.getStringArray(R.array.tab_names);
        }

        @Override
        public CharSequence getPageTitle(int position) {
            // TODO Auto-generated method stub
            return tab_names[position];
        }
        
        @Override
        public Fragment getItem(int position) {
            
            return FragmentFactory.createFragment(position);
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return tab_names.length;
        }
         
     }

    @Override
    protected void initView() {
        setContentView(R.layout.activity_main);
        mTabs = (PagerTab) findViewById(R.id.tabs);
        mPager = (ViewPager) findViewById(R.id.pager);
        MainAdapter adapter = new MainAdapter(getSupportFragmentManager());
        mPager.setAdapter(adapter);
        //绑定到一起
        mTabs.setViewPager(mPager);
        mTabs.setOnPageChangeListener(this);
    }

    @Override
    public void onPageScrollStateChanged(int arg0) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void onPageScrolled(int arg0, float arg1, int arg2) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void onPageSelected(int arg0) {
        BaseFragment fragment = FragmentFactory.createFragment(arg0);
        fragment.show();
    }

}
MainActivity

 

android 应用架构随笔六(Loading加载页面)

标签:image   over   turn   service   rri   click   onclick   数据   bar   

原文地址:http://www.cnblogs.com/ecollab/p/6079983.html

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