如何將圖像加載到網格視圖？

我有一個數據庫鏈接的圖像，我怎麼能從服務器下載圖像&顯示它在網格視圖。以及我已經通過這個代碼here 任何人都可以幫助我。如何將圖像加載到網格視圖？

2013-05-30 Uday

當您在URL（圖像）的列表，並希望將其加載到GridView中，你可以試試：

2013-05-30 10:45:50

ThankQ兄弟。它幫了我很多。 – Uday

我用下面的HomeActivity功能.java

public void loadGallery() throws Exception{ 
      String jBannerString = executeHttpGet("http://sujanmaharjan.com.np/joomla/index.php?option=com_atomicongallery&folder=root"); 
      // String jBannerString = executeHttpGet("http://localhost/new/himalmag/index.php?option=com_gk"); 

       jBannerString = "{'earthquakes':" + jBannerString; 
       jBannerString = jBannerString + "}"; 

         JSONArray r_jsBanner = null; 
         try 
         { 
         jObject = new JSONObject(jBannerString); 
         r_jsBanner = jObject.getJSONArray("earthquakes");  
         id = new String[r_jsBanner.length()]; 
         thumb_image = new String[r_jsBanner.length()]; 
         main_image = new String[r_jsBanner.length()]; 
         for (int i =0; i < r_jsBanner.length() ; i++){ 
          JSONObject arGallery = r_jsBanner.getJSONObject(i); 
          id[i]= i+""; 
          thumb_image[i]=arGallery.getString("thumbnail"); 
          main_image[i]=arGallery.getString("url"); 

         }      
         } catch(Exception es){   
         } 

      Message myMessage=new Message(); 
      Bundle resBundle = new Bundle(); 
      resBundle.putString("status", "SUCCESS"); 
      myMessage.obj=resBundle; 
      handlerGallery.sendMessage(myMessage); 
     } 
     private Handler handlerGallery = new Handler() { 

      public void handleMessage(Message msg) {     
      // dialog.dismiss(); 
       GkTab.gkTab.progressBar.setVisibility(View.GONE); 
       GridView gridGallery = (GridView)findViewById(R.id.gridGallery); 
       gridGallery.setAdapter(new ImageAdapter(HomeActivity.this,R.layout.gridview , thumb_image,1)); 
       gridGallery.setOnItemClickListener(
         new OnItemClickListener() 
         {        
          public void onItemClick(AdapterView<?> arg0, View arg1, int position , long id) { 

            Intent myintent =new Intent(getApplicationContext(), LayoutGallery.class); 
            myintent.putExtra("position",position); 
            myintent.putExtra("stringurl", main_image); 
            startActivity(myintent); 

           } 
         }); 
      } 
     }; 
     public String executeHttpGet(String httpUrl) throws Exception { 

      BufferedReader in = null; 
      StringBuffer sb = new StringBuffer(""); 
      try { 
      /* HttpParams httpParameters = new BasicHttpParams(); 
       HttpConnectionParams.setConnectionTimeout(httpParameters, 1000); // Connection timeout 
       HttpConnectionParams.setSoTimeout(httpParameters, 1000); // Socket timeout 
    */ 
       HttpClient client = new DefaultHttpClient(); 
       HttpGet request = new HttpGet(); 
       request.setURI(new URI(httpUrl)); 
       HttpResponse response = client.execute(request); 
       in = new BufferedReader 
       (new InputStreamReader(response.getEntity().getContent())); 

       String line = ""; 
       String NL = System.getProperty("line.separator"); 
       while ((line = in.readLine()) != null) { 
        sb.append(line + NL); 
       } 
       in.close(); 
       // parse(sb.toString()); 
       } 
      finally { 
       if (in != null) { 
        try { 
         in.close(); 
         } catch (IOException e) { 
         e.getMessage(); 
        }     
       } 
      } 

      return sb.toString(); 
     }

創建新的活動La youtGallery.java

public class LayoutGallery extends Activity { 
CustomGallery galleryPictureImage; 
/** Called when the activity is first created. */ 
@Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    //makes full screen and takes away title bar 
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    // 
    Display display = getWindowManager().getDefaultDisplay(); 
    int width = display.getWidth(); 
    int height = width*3/4; 

    setContentView(R.layout.gallerylayout); 
    Intent i = getIntent(); 
    // Receiving the Data 
    int position= i.getIntExtra("position", 0); 
    String[] stringurl = i.getStringArrayExtra("stringurl"); 
    galleryPictureImage = (CustomGallery)findViewById(R.id.picturegallerynew); 
    galleryPictureImage.setSpacing(50); 
    galleryPictureImage.setAdapter(new LazyGalleryAdapter(LayoutGallery.this,stringurl,null,width,height,1)); 
    galleryPictureImage.setSelection(position); 

    } 


}

創建CustomGallery.java

import android.content.Context; 
import android.util.AttributeSet; 
import android.view.MotionEvent; 
import android.widget.Gallery; 

public class CustomGallery extends Gallery{ 

    public CustomGallery(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { 
     return super.onFling(e1, e2, 0, velocityY); 
    } 

}

創建gallerylayout.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="horizontal" 
    > 
     <com.np.sujanmaharjan.gk.CustomGallery 
       xmlns:android="http://schemas.android.com/apk/res/android" 
       android:id="@+id/picturegallerynew" 
       android:fadingEdge="none" 
       android:layout_height="wrap_content" 
       android:layout_width="match_parent" 
       android:layout_gravity="center" 
       android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" /> 

</LinearLayout>

創建LazyGalleryAdapter.java

package com.np.sujanmaharjan.gk; 


import android.app.Activity; 
import android.content.Context; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.BaseAdapter; 
import android.widget.Gallery; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 
import android.widget.ProgressBar; 
import android.widget.TextView; 


public class LazyGalleryAdapter extends BaseAdapter{ 

    private Activity activity; 
    private String[] data; 
    private static LayoutInflater inflater=null; 
    private ProgressBar mProgressBar; 
    public ImageLoader imageLoader; 
    public int width; 
    public int height; 
    public int imgwidth; 
    private String[] caption; 
    public int widthStatus=0; 
    public LazyGalleryAdapter(Activity a, String[] d) { 
     activity = a; 
     data=d; 
     inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     imageLoader=new ImageLoader(activity.getApplicationContext()); 

    } 
    public LazyGalleryAdapter(Activity a, String[] d,String[] c,int wid,int h,int mainGallery) { 
     activity = a; 
     caption= c; 
     data=d; 
     inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     imageLoader=new ImageLoader(activity.getApplicationContext()); 
     width=wid; 
     height=h; 
     if(mainGallery==1) 
      widthStatus=1; // for main gallery of picture 

    } 

    public int getCount() { 
     return data.length; 
    } 

    public Object getItem(int position) { 
     return position; 
    } 

    public long getItemId(int position) { 
     return position; 
    } 

    public static class ViewHolder{ 
     public TextView text; 
     public ImageView image; 
     public ProgressBar progressBar; 
     public LinearLayout ProgressContain; 
     public LinearLayout imageCaptionLayout; 
    } 

    public View getView(int position, View convertView, ViewGroup parent) { 
     View vi=convertView; 
     ViewHolder holder; 
     if(convertView==null){ 
      vi = inflater.inflate(R.layout.gallerypage, null); 
      holder=new ViewHolder(); 
      holder.image=(ImageView)vi.findViewById(R.id.imageGallery); 
      holder.progressBar = (ProgressBar)vi.findViewById(R.id.idProgressBar); 
      holder.ProgressContain = (LinearLayout)vi.findViewById(R.id.idProgressContain); 
      holder.imageCaptionLayout = (LinearLayout)vi.findViewById(R.id.imageCaptionLayout); 
      holder.text =(TextView)vi.findViewById(R.id.imageCaption); 

       imgwidth=width; 
       holder.image.getLayoutParams().width=imgwidth; 
       holder.image.getLayoutParams().height=imgwidth*2/3; 
       holder.image.setScaleType(ImageView.ScaleType.FIT_XY); 
       holder.ProgressContain.getLayoutParams().width=imgwidth; 
       holder.ProgressContain.getLayoutParams().height=imgwidth*2/3; 
       holder.ProgressContain.setBackgroundColor(0xFF414141);   

      vi.setTag(holder); 
     } 
     else 
      holder=(ViewHolder)vi.getTag(); 

      if(caption[position].equals("")){ 
       holder.text.setText("no caption"); 
       holder.text.setVisibility(View.INVISIBLE); 
       holder.imageCaptionLayout.getBackground().setAlpha(0); 
      } 
      else{ 
       holder.imageCaptionLayout.getBackground().setAlpha(100); 
       holder.text.setText(caption[position]+" "); 
       holder.text.setVisibility(View.VISIBLE); 
      } 

     holder.image.setTag(data[position]); 
     imageLoader.DisplayImage(data[position], activity, holder.image,holder.ProgressContain); 

     return vi; 
    } 

}

來源

2013-05-30 11:08:59 Techlord

如何將圖像加載到網格視圖？

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