Java read picture thumbnail bug

Be sure to create a cache under the album View

A recent connection to the application of the server, need to read pictures, general for users to publish the product selection upload pictures, the original picture list should be thumbnail, only to determine, only upload original image, ok not much to say on the code

Package Edu.buaa.erhuo;
Import Java.io.File;
Import java.util.ArrayList;
Import Java.util.HashMap;
Import java.util.List;
    
    
Import Java.util.Map;
Import Org.json.JSONArray;
    
    
Import Org.json.JSONObject;
Import Android.net.Uri;
Import Android.os.Bundle;
Import Android.os.Handler;
Import Android.os.Message;
Import android.app.Activity;
Import Android.app.AlertDialog.Builder;
Import Android.app.ProgressDialog;
Import Android.content.DialogInterface;
Import android.content.Intent;
Import Android.view.Menu;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.ArrayAdapter;
Import Android.widget.Button;
Import Android.widget.EditText;
Import Android.widget.ImageView;
Import Android.widget.Spinner;
Import Android.widget.TextView;
Import Android.widget.Toast;
Import EDU.BUAA.ERHUO.R;
    
    
Import Edu.buaa.erhuo.Utils.NetworkUtils; public class Pubactivity extends activity {private edittext et_title,et_des; private Button Btn_Choose,btn_addsubmit;
Private Spinner Spinner_typeid;
Private arrayadapter<string> adapter;
Private list<string> allvalues = new arraylist<string> ();
Private list<integer> alltypeids = new arraylist<integer> ();
Private Handler Handler;
    
    
Private ImageView photoimg;
Private String FilePath; @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (
R.LAYOUT.ACTIVITY_PUB);
Et_title= (EditText) Findviewbyid (r.id.et_title);
Et_des= (EditText) Findviewbyid (r.id.et_description);
Btn_choose= (Button) Findviewbyid (R.id.btn_choose_photo);
btn_addsubmit= (Button) Findviewbyid (r.id.btn_add_submit);
Spinner_typeid= (Spinner) Findviewbyid (R.id.spinner_type);
    
Photoimg= (ImageView) Findviewbyid (R.id.img_photo); Handler=new handler () {public void Handlemessage (message msg) {if (msg.what==0) {//has network and read to data adapter=new arrayadapter&lt ; String> (Pubactivity.this, Android.)
R.layout.simple_spinner_item,allvalues); Adapter.Setdropdownviewresource (Android.
R.layout.simple_spinner_dropdown_item);
Spinner_typeid.setadapter (adapter); else if (msg.what==1) {//commit to Background successful Toast.maketext (Pubactivity.this, "add Success", Toast.length_short). Show (); et_
Title.settext ("");
Et_des.settext ("");
Spinner_typeid.setselection (0);
Photoimg.setimageuri (NULL);
Filepath=null;
else if (msg.what==2) {//submit to Background failure Toast.maketext (Pubactivity.this, add failed, Toast.length_short). Show ();
}; Invokes the tool class, querying all commodity classification data thread T=new thread () {public void run () {try {Jsonarray Array=networkutils.getjsonarraybyurl (netw
Orkutils.get_all_product_type_url);
System.out.println (array+ "Kane ... ..."); " Iterate through the data, save it to the list collection for (int i = 0; i < array.length (); i++) {Jsonobject obj = array.getjsonobject (i); allvalues.ad
D (obj.getstring ("type_name"));
Alltypeids.add (Obj.getint ("type_id"));
} handler.sendemptymessage (0);
catch (Exception e) {//TODO auto-generated catch block E.printstacktrace ();}}
};
    
T.start (); Btn_addsubmit.setonclicklistener (nEW Onclicklistener () {@Override public void OnClick (View arg0) {final ProgressDialog dialog=new ProgressDialog (Puba
Ctivity.this);
Dialog.settitle ("hint");
Dialog.setmessage ("Submitting the data ...");
Dialog.show (); Thread T=new thread () {public void run () {map<string,string> params=new hashmap<string, string> (); Params.pu
T ("Product.product_name", Et_title.gettext (). toString ());
Params.put ("Product.description", Et_des.gettext (). toString ());
Params.put ("product.type_id", Alltypeids.get (Spinner_typeid.getselecteditemposition ()). ToString ()); if (filepath==null) {try {String result=networkutils.postdatabyurl (networkutils.product_insert_url, params); if ( Result.equals ("OK")) {handler.sendemptymessage (1);} else {handler.sendemptymessage (2);}}
    
catch (Exception e) {//TODO auto-generated catch block E.printstacktrace (); Handler.sendemptymessage (2);} else {try {String result = Networkutils.postfilebyurl (Networkutils.product_insert_url, params, filePath); EQuals ("OK")) {handler.sendemptymessage (1);} else {handler.sendemptymessage (2);}}
catch (Exception e) {e.printstacktrace (); Handler.sendemptymessage (2);}}
Dialog.dismiss ();
}
};
    
T.start ();
    
}
}); Btn_choose.setonclicklistener (New Onclicklistener () {@Override public void OnClick (View arg0) {Builder builder=new
Builder (Pubactivity.this);
Builder.settitle ("Please choose"); Builder.setitems (New string[]{"Photo", "Select from album"}, New Dialoginterface.onclicklistener () {@Override public void OnClick (Di Aloginterface dialoginterface, int which) {switch (which) {case 0:intent intent=new Intent (pubactivity.this,cameraactiv
Ity.class);
StartActivity (Intent);
    
    
Break
Case 1:intent in = new Intent (pubactivity.this, Selectimageactivity.class);
    
    
Startactivityforresult (in, 1);
Break
}
}
}); Builder.setpositivebutton ("Cancel", new Dialoginterface.onclicklistener () {public void OnClick (Dialoginterface dialogint
Erface, int which) {//TODO auto-generated method stub}});
Builder.create (). Show ();
}
}); }//Requested activity returns a result @Override protected void onactivityresult (int requestcode, int resultcode, Intent data) {if results Code = = RESULT_OK) {FilePath = Data.getstringextra ("FilePath"); Photoimg.setimageuri (Uri.fromfile (New File (FilePath))
);
    
    
}} package Edu.buaa.erhuo;
Import Java.io.File;
Import Java.util.HashMap;
Import java.util.List;
    
    
Import Java.util.Map;
Import Edu.buaa.erhuo.adapter.PhotoImageAdapter;
Import Android.net.Uri;
Import Android.os.Bundle;
Import Android.provider.MediaStore;
Import Android.provider.MediaStore.Images;
Import Android.provider.MediaStore.Images.Media;
Import Android.provider.MediaStore.Images.Thumbnails;
Import android.app.Activity;
Import Android.app.AlertDialog.Builder;
Import Android.content.DialogInterface;
Import Android.content.DialogInterface.OnClickListener;
Import android.content.Intent;
Import Android.database.Cursor;
Import Android.view.Menu;
Import Android.view.View; Import anDroid.widget.AdapterView;
Import Android.widget.ImageView;
Import Android.widget.AdapterView.OnItemClickListener;
    
    
Import Android.widget.GridView; public class Selectimageactivity extends activity {private GridView GridView; private Photoimageadapter adapter; private
  List<map<string, object>> allvalues=new arraylist<map<string,object>> (); @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (
R.layout.activity_select_image);
gridview= (GridView) Findviewbyid (R.id.grid); To get data, thumbnails thumbnails, you must first view the album to form a cache, otherwise there is no thumbnail Cursor c=getcontentresolver (). Query (
    
MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, NULL, null,null,null);
C.movetofirst (); while (!c.isafterlast ()) {map<string,object> map=new hashmap<string, object> ();////corresponding to the original ID map.put ("
imageID ", C.getlong (C.getcolumnindex (thumbnails.image_id)));
    
DATA is the path name Map.put ("filepath", C.getstring (C.getcolumnindex (thumbnails.data)); AlLvalues.add (map);
C.movetonext ();
    
    
} c.close ();
Adapter=new Photoimageadapter (allvalues, this);
    
Gridview.setadapter (adapter); Gridview.setonitemclicklistener (New Onitemclicklistener () {@Override public void Onitemclick (ADAPTERVIEW&LT;?&G T
arg0, View arg1, int position, long Arg3) {final map<string,object> map=allvalues.get (position);
Builder builder=new Builder (selectimageactivity.this); Builder.settitle (Are you sure you want to use this good photo?)
");
ImageView img=new ImageView (selectimageactivity.this);
Img.setimageuri (Uri.fromfile (New File (Map.get ("filepath"). ToString ()));
Builder.setview (IMG);  Builder.setpositivebutton (OK), new Onclicklistener () {@Override public void OnClick (dialoginterface arg0, int arg1) {//Get Picture Original location//need associated query Cursor c=getcontentresolver (). Query (images.media.external_content_uri,null,media._id+ "=?"),
New String[]{map.get ("imageID"). ToString ()}, NULL);
String Realpath=null; if (C.movetofirst ()) {realpath=c.getstring (C.getcolumnindex (Media.data));} C.cloSE ();
Intent in=new Intent ();
In.putextra ("filepath", Realpath);
Setresult (result_ok,in)//give feedback to the source that called the activity ();
}
}); Builder.setnegativebutton ("Cancel", new Onclicklistener () {@Override public void OnClick (dialoginterface arg0, int arg1)
{//TODO auto-generated Method stub}});
Builder.create (). Show ();
}
}); }
}

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Adapter that need to be used

Package edu.buaa.erhuo.adapter;
Import Java.io.File;
Import java.util.List;
    
    
Import Java.util.Map;
Import Android.content.Context;
Import Android.net.Uri;
Import Android.view.LayoutInflater;
Import Android.view.View;
Import Android.view.ViewGroup;
Import Android.widget.AbsListView.LayoutParams;
Import Android.widget.BaseAdapter;
Import Android.widget.ImageView;
Import EDU.BUAA.ERHUO.R;
    
    
Import Edu.buaa.erhuo.Utils.Globals; public class Photoimageadapter extends Baseadapter {private list<map<string, object>> allvalues; pr
    
    
Ivate context CTX;
Public Photoimageadapter (list<map<string, object>> allvalues, Context ctx) {this.allvalues = allValues;
This.ctx = CTX;
    
    
@Override public int GetCount () {return allvalues.size ();}
    
    
@Override public Object getitem (int position) {return allvalues.get (position);}
    
    
@Override public long getitemid (int position) {return position;} @OverridE public View getview (int position, View Convertview, ViewGroup parent) {if (Convertview = null) {Convertview = Layouti
Nflater.from (CTX). Inflate (r.layout.grid_image_line, NULL);
Convertview.setlayoutparams (New Layoutparams (Layoutparams.match_parent, GLOBALS.SCREEN_HEIGHT/6));
    
    
} map<string, object> Map = allvalues.get (position);
    
    
ImageView img = (imageview) convertview. Findviewbyid (R.id.photo_img_line);
    
    
Img.setimageuri (Uri.fromfile (New File (Map.get ("FilePath"). ToString ()));
return convertview; }
    
    
}