我正在尝试检索已经从字节转换为位图的图像数据。但是没有显示任何图片，而是显示图片。在logcat中，我可以清楚地看到我的图像数据变成了位图。
这是我保存mydata的java代码
items Item= new items();
db.getWritableDatabase();
Item.setName(name.getText().toString());
Item.setCategory(SpCate.getSelectedItem().toString());
Item.setDetails(details.getText().toString());
Item.setImage(imageInByte);
db.addItemSpinner(new items());
// Save the Data in Database
MyDb entry= new MyDb(SellingItem.this);
entry.getWritableDatabase();
entry.addItemSpinner(Item);
entry.close();
Toast.makeText(getApplicationContext(), "Account Successfully Created ", Toast.LENGTH_LONG).show();
Log.d("name", Item.getName());
Log.d("category", Item.getCategory().toString());
Log.d("details", Item.getDetails());
Log.d("image", Item.getImage().toString());
Intent i=new Intent(SellingItem.this,SearchItem.class);
startActivity(i);
这是我的数据库，用于检索数据。
public List<items> getAllContacts() {
List<items> itemlist = new ArrayList<items>();
// Select All Query
String selectQuery = "SELECT * FROM PRODUCT ORDER BY name";
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
items item = new items();
item.setId(Integer.parseInt(cursor.getString(0)));
item.setName(cursor.getString(1));
item.setImage(cursor.getBlob(2));
// Adding contact to list
itemlist.add(item);
} while (cursor.moveToNext());
}
// close inserting data from database
db.close();
// return contact list
return itemlist;
}
这是我在listview中显示数据的java代码
dataList = (ListView) findViewById(R.id.list);
db = new MyDb(this);
List<items> Item = db.getAllContacts();
for (items cn : Item) {
String log = "Id:" + cn.getId()
+ " ,Image: " + cn.getImage();
// Writing Contacts to log
Log.d("Result: ", log);
// add contacts data in arrayList
imageArray.add(cn);
}
adapter = new CustomListAdapter(this, R.layout.screen_list,
imageArray);
dataList.setAdapter(adapter);
dataList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
imageName = imageArray.get(position).getImage();
imageid = imageArray.get(position).getId();
//convert byte to bitmap
ByteArrayInputStream imageStream = new ByteArrayInputStream(
imageName);
theImage = BitmapFactory.decodeStream(imageStream);
Intent intent = new Intent(SearchItem.this,
DisplayDetails.class);
intent.putExtra("imageid", imageid);
intent.putExtra("imagename", theImage);
startActivity(intent);
}
});
这是logcat，它显示了可以读取的图像位图和id。
Id:2 ,Image: [B@428e21d8
我不知道我的代码有什么问题，但我需要在listview中查看该图像。任何帮助将不胜感激。
这是我的CustomListAdapter
package com.example.projectonline;
import java.io.ByteArrayInputStream;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class CustomListAdapter extends ArrayAdapter<items>{
ArrayList<items> data= new ArrayList<items>();
Context context;
int layoutResourceId;
public CustomListAdapter(Context context, int layoutResourceId, ArrayList<items> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ImageHolder holder = null;
if(row == null)
{
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new ImageHolder();
holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle);
holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon);
row.setTag(holder);
}
else
{
holder = (ImageHolder)row.getTag();
}
items picture = data.get(position);
holder.txtTitle.setText(picture.name);
//convert byte to bitmap take from contact class
byte[] outImage=picture.image;
ByteArrayInputStream imageStream = new ByteArrayInputStream(outImage);
Bitmap theImage = BitmapFactory.decodeStream(imageStream);
holder.imgIcon.setImageBitmap(theImage);
return row;
}
static class ImageHolder
{
ImageView imgIcon;
TextView txtTitle;
}
}