滑翔：如何阻止加载图像滑翔从缓存中，而不是从服务器每次

Question

我尝试一切可能加载，但不能揣摩如何更新图像下滑每当我的JSON是更新

我的Android应用程序initally加载使用滑翔firsttime json的影像后，它只能从cache.It亘古不被更新的服务器，直到我删除应用程序，并重新安装加载图像加载图像它

我尝试使用diskCacheStrategy（DiskCacheStrategy.NONE）和.skipMemoryCache（true）但没有任何事发生

Glide.with(mContext).load(image.getMedium()) 
       .thumbnail(0.5f) 
       .crossFade() 
       .diskCacheStrategy(DiskCacheStrategy.NONE) 
       .skipMemoryCache(true) 
       .into(holder.thumbnail); 

这是我的代码GalleryAdapter.java

import android.content.Context; 
import android.support.v7.widget.RecyclerView; 
import android.view.GestureDetector; 
import android.view.LayoutInflater; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 

import com.bumptech.glide.Glide; 
import com.bumptech.glide.load.engine.DiskCacheStrategy; 

import java.util.List; 

import com.bumptech.glide.signature.StringSignature; 
import com.dailysolutions.sn.R; 
import com.dailysolutions.sn.model.Image; 

/** 
* Created by Sagunesh on 31/03/16. 
*/ 

public class GalleryAdapter extends RecyclerView.Adapter<GalleryAdapter.MyViewHolder> { 

    private List<Image> images; 
    private Context mContext; 

    public class MyViewHolder extends RecyclerView.ViewHolder { 
     public ImageView thumbnail; 

     public MyViewHolder(View view) { 
      super(view); 
      thumbnail = (ImageView) view.findViewById(R.id.thumbnail); 
     } 
    } 


    public GalleryAdapter(Context context, List<Image> images) { 
     mContext = context; 
     this.images = images; 
    } 

    @Override 
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View itemView = LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.gallery_thumbnail, parent, false); 

     return new MyViewHolder(itemView); 
    } 

    @Override 
    public void onBindViewHolder(MyViewHolder holder, int position) { 
     Image image = images.get(position); 

     Glide.with(mContext).load(image.getMedium()) 
       .thumbnail(0.5f) 
       .crossFade() 
       .diskCacheStrategy(DiskCacheStrategy.NONE) 
       .skipMemoryCache(true) 
       .into(holder.thumbnail); 

    } 

    @Override 
    public int getItemCount() { 
     return images.size(); 
    } 

    public interface ClickListener { 
     void onClick(View view, int position); 

     void onLongClick(View view, int position); 
    } 

    public static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener { 

     private GestureDetector gestureDetector; 
     private GalleryAdapter.ClickListener clickListener; 

     public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final GalleryAdapter.ClickListener clickListener) { 
      this.clickListener = clickListener; 
      gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() { 
       @Override 
       public boolean onSingleTapUp(MotionEvent e) { 
        return true; 
       } 

       @Override 
       public void onLongPress(MotionEvent e) { 
        View child = recyclerView.findChildViewUnder(e.getX(), e.getY()); 
        if (child != null && clickListener != null) { 
         clickListener.onLongClick(child, recyclerView.getChildPosition(child)); 
        } 
       } 
      }); 
     } 

     @Override 
     public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) { 

      View child = rv.findChildViewUnder(e.getX(), e.getY()); 
      if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) { 
       clickListener.onClick(child, rv.getChildPosition(child)); 
      } 
      return false; 
     } 

     @Override 
     public void onTouchEvent(RecyclerView rv, MotionEvent e) { 
     } 

     @Override 
     public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) { 

     } 
    } 
} 

这里是MainActivity.java的代码

import android.app.ProgressDialog; 
import android.content.Context; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.os.Bundle; 
import android.support.design.widget.NavigationView; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarDrawerToggle; 
import android.support.v7.widget.RecyclerView; 
import android.support.v7.widget.Toolbar; 
import android.view.LayoutInflater; 
import android.view.Menu; 
import android.view.View; 
import android.view.MenuItem; 
import android.view.animation.Animation; 
import android.view.animation.AnimationUtils; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.bumptech.glide.Glide; 
import com.dailysolutions.sn.R; 
import com.dailysolutions.sn.adapter.GalleryAdapter; 
import com.google.android.gms.ads.AdListener; 
import com.google.android.gms.ads.AdView; 

import android.app.ProgressDialog; 
import android.content.DialogInterface; 
import android.os.Bundle; 
import android.support.design.widget.NavigationView; 
import android.support.v4.app.FragmentTransaction; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarDrawerToggle; 
import android.support.v7.app.AlertDialog; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.DefaultItemAnimator; 
import android.support.v7.widget.GridLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.support.v7.widget.Toolbar; 
import android.util.Log; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.android.volley.Response; 
import com.android.volley.VolleyError; 
import com.android.volley.toolbox.JsonArrayRequest; 
import com.google.android.gms.ads.AdRequest; 


import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import java.util.ArrayList; 

import com.dailysolutions.sn.app.AppController; 
import com.dailysolutions.sn.model.Image; 
import com.google.android.gms.ads.InterstitialAd; 

import java.util.ArrayList; 

public class MainActivity extends BaseActivity { 
    private DrawerLayout drawerLayout; 
    private Toolbar toolbar; 



    private String TAG = MainActivity.class.getSimpleName(); 
    private static final String endpoint = "https://www.freesabkuch.com/api_mehndi/glide.json"; 
    private ArrayList<Image> images; 
    private ProgressDialog pDialog; 
    private GalleryAdapter mAdapter; 
    private RecyclerView recyclerView; 
    private AdView mAdView; 
    InterstitialAd interstitial; 

    // Our created menu to use 
    private Menu mymenu; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 


     toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 
     initNavigationDrawer(); 
     checkConnectivity(); 

     //advertisement 
     mAdView = (AdView) findViewById(R.id.adView); 
     AdRequest adRequest = new AdRequest.Builder() 
       .build(); 
     mAdView.loadAd(adRequest); 

     // Prepare the Interstitial Ad 
     interstitial = new InterstitialAd(MainActivity.this); 
// Insert the Ad Unit ID 
     interstitial.setAdUnitId(getString(R.string.admob_interstitial_id)); 

     interstitial.loadAd(adRequest); 
// Prepare an Interstitial Ad Listener 
     interstitial.setAdListener(new AdListener() { 
      public void onAdLoaded() { 
       // Call displayInterstitial() function 
       displayInterstitial(); 
      } 
     }); 

     recyclerView = (RecyclerView) findViewById(R.id.recycler_view); 

     pDialog = new ProgressDialog(this); 
     images = new ArrayList<>(); 
     mAdapter = new GalleryAdapter(getApplicationContext(), images); 

     RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(getApplicationContext(), 2); 
     recyclerView.setLayoutManager(mLayoutManager); 
     recyclerView.setItemAnimator(new DefaultItemAnimator()); 
     recyclerView.setAdapter(mAdapter); 

     recyclerView.addOnItemTouchListener(new GalleryAdapter.RecyclerTouchListener(getApplicationContext(), recyclerView, new GalleryAdapter.ClickListener() { 
      @Override 
      public void onClick(View view, int position) { 
       Bundle bundle = new Bundle(); 
       bundle.putSerializable("images", images); 
       bundle.putInt("position", position); 

       FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); 
       SlideshowDialogFragment newFragment = SlideshowDialogFragment.newInstance(); 
       newFragment.setArguments(bundle); 
       newFragment.show(ft, "slideshow"); 
      } 

      @Override 
      public void onLongClick(View view, int position) { 

      } 
     })); 

     fetchImages(); 




    } 

    public void displayInterstitial() { 
// If Ads are loaded, show Interstitial else show nothing. 
     if (interstitial.isLoaded()) { 
      interstitial.show(); 
     } 
    } 
    @Override 
    public void onResume() { 
     // Start or resume the game. 
     super.onResume(); 
     displayInterstitial(); 
    } 
    @Override 
    public void onStart() { 
     super.onStart(); 
     displayInterstitial(); 
    } 
    private void fetchImages() { 

     pDialog.setMessage("Downloading...."); 
     pDialog.show(); 

     JsonArrayRequest req = new JsonArrayRequest(endpoint, 
       new Response.Listener<JSONArray>() { 
        @Override 
        public void onResponse(JSONArray response) { 
         Log.d(TAG, response.toString()); 
         pDialog.hide(); 

         images.clear(); 
         for (int i = 0; i < response.length(); i++) { 
          try { 
           JSONObject object = response.getJSONObject(i); 
           Image image = new Image(); 
           image.setName(object.getString("name")); 

           JSONObject url = object.getJSONObject("url"); 
           image.setSmall(url.getString("small")); 
           image.setMedium(url.getString("medium")); 
           image.setLarge(url.getString("large")); 
           image.setTimestamp(object.getString("timestamp")); 

           images.add(image); 

          } catch (JSONException e) { 
           Log.e(TAG, "Json parsing error: " + e.getMessage()); 
          } 
         } 

         mAdapter.notifyDataSetChanged(); 
        } 
       }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       Log.e(TAG, "Error: " + error.getMessage()); 
       pDialog.hide(); 
      } 
     }); 

     // Adding request to request queue 
     AppController.getInstance().addToRequestQueue(req); 
    } 



    @Override 
    public void onBackPressed() { 
     exit(); 
    } 


    public void initNavigationDrawer() { 

     NavigationView navigationView = (NavigationView)findViewById(R.id.navigation_view); 
     navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { 
      @Override 
      public boolean onNavigationItemSelected(MenuItem menuItem) { 

       int id = menuItem.getItemId(); 

       switch (id){ 
        case R.id.home: 
         Toast.makeText(getApplicationContext(),"Home",Toast.LENGTH_SHORT).show(); 
         drawerLayout.closeDrawers(); 
         break; 
        case R.id.share: 
         Toast.makeText(getApplicationContext(),"Share",Toast.LENGTH_SHORT).show(); 
         drawerLayout.closeDrawers(); 
         try { 
          Intent i = new Intent(Intent.ACTION_SEND); 
          i.setType("text/plain"); 
          i.putExtra(Intent.EXTRA_SUBJECT, "My application name"); 
          String sAux = "\nLet me recommend you this application\n\n"; 
          sAux = sAux + "https://play.google.com/store/apps/details?id=Orion.Soft \n\n"; 
          i.putExtra(Intent.EXTRA_TEXT, sAux); 
          startActivity(Intent.createChooser(i, "choose one")); 
         } catch(Exception e) { 
          //e.toString(); 
         } 
        case R.id.trash: 
         Toast.makeText(getApplicationContext(),"Drawer Closed",Toast.LENGTH_SHORT).show(); 
         drawerLayout.closeDrawers(); 
         break; 
        case R.id.logout: 
         exit(); 

       } 
       return true; 
      } 
     }); 
     View header = navigationView.getHeaderView(0); 
     TextView tv_email = (TextView)header.findViewById(R.id.tv_email); 
     tv_email.setText("Daily Solutions"); 
     drawerLayout = (DrawerLayout)findViewById(R.id.drawer); 

     ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.drawer_open,R.string.drawer_close){ 

      @Override 
      public void onDrawerClosed(View v){ 
       super.onDrawerClosed(v); 
      } 

      @Override 
      public void onDrawerOpened(View v) { 
       super.onDrawerOpened(v); 
      } 
     }; 
     drawerLayout.addDrawerListener(actionBarDrawerToggle); 
     actionBarDrawerToggle.syncState(); 
    } 
    private void checkConnectivity(){ 
     if(ConnectionHelper.isConnectedOrConnecting(getApplicationContext())) { 
      hideErrorsBar(true); 

     }else { 
      //hideErrorsBar(false); 
      Intent Intent = new Intent(MainActivity.this,NoInternet.class); 
      startActivity(Intent); 
      finish(); 
     } 
    } 



    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Add our menu 
     getMenuInflater().inflate(R.menu.menu_main, menu); 

     // We should save our menu so we can use it to reset our updater. 
     mymenu = menu; 

     // 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     switch(item.getItemId()) { 
      case R.id.action_refresh: 
       // Do animation start 
       LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
       ImageView iv = (ImageView)inflater.inflate(R.layout.iv_refresh, null); 
       Animation rotation = AnimationUtils.loadAnimation(this, R.anim.rotate_refresh); 
       rotation.setRepeatCount(Animation.INFINITE); 
       iv.startAnimation(rotation); 
       item.setActionView(iv); 
       new UpdateTask(this).execute(); 
       return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 


    public void resetUpdating() 
    { 
     // Get our refresh item from the menu 
     MenuItem m = mymenu.findItem(R.id.action_refresh); 
     if(m.getActionView()!=null) 
     { 
      // Remove the animation. 
      m.getActionView().clearAnimation(); 
      m.setActionView(null); 
     } 
    } 



} 

请人帮助me.It将是真正伟大的，如果有人帮我此问题

Answer 1

那么大家非常感谢帮助:)

我决定通过禁止凌空库高速缓存这个问题是造成问题，但无论如何感谢帮助:)

//disabling caching for url 
     AppController.getInstance().getRequestQueue().getCache().remove(url); 

Answer 2

您可以使用Signature来使网络中的缓存和加载映像失效。尝试

Glide.with(Fragment/context) 
.load(imagePath) 
.signature(new StringSignature(yourVersion)) 
.into(ImageView); 

只是传递new StringSignature(System.currentTimeMillis()+"")的签名，以便它将从网络每次

Answer 3

您也可以尝试在缓存设置Signatures 按滑翔文档

试试这个

加载图像

Glide.with(context) 
    .load(url) . 
    signature(new StringSignature(System.currentTimeMillis())) 
.into(imageView); 

检查here了解更多详情