如何显示在Android的图片廊 [英] How to display Image Gallery in Android
本文介绍了如何显示在Android的图片廊的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我是新android开发。
我的问题是我能够检索源码数据库中的数据。
我将在图片数据中图片。
我需要从数据库中检索和显示的图片库的所有图像数据。
有没有办法做到这一点。
下面是我的code
进口的java.util.ArrayList;
进口android.app.Activity;
进口android.content.Context;
进口android.content.Intent;
进口android.content.res.TypedArray;
进口android.database.Cursor;
进口android.database.sqlite.SQLiteDatabase;
进口android.graphics.Bitmap;
进口android.graphics.BitmapFactory;
进口android.os.Bundle;
进口android.util.Log;
进口android.view.View;
进口android.view.ViewGroup;
进口android.widget.AdapterView;
进口android.widget.AdapterView.OnItemClickListener;
进口android.widget.BaseAdapter;
进口android.widget.Gallery;
进口android.widget.ImageView;
公共类task1images延伸活动{
私人整数[] myImageIds;
私人画廊的画廊;
私人ImageView的imgView;
@覆盖
公共无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.images）;
SQLiteDatabase MYDB = this.openOrCreateDatabase（test.db的，SQLiteDatabase.OPEN_READWRITE，NULL）;
尝试{
光标C = myDB.rawQuery（选择照片从邮件中，其中任务= 1和照片=''！，NULL）;
//从光标库项目
ArrayList的galleryList =新的ArrayList（）;
为（c.moveToFirst（）;! c.isAfterLast（）; c.moveToNext（））{
整数加仑;
加仑= c.getInt（c.getColumnIndex（图片））;
galleryList.add（GAL）;
}
的System.out.println（大小:::+ galleryList.size（））;
myImageIds =（整数[]）galleryList.toArray（新的整数[galleryList.size（））;
的System.out.println（myImageIds [0]）;
imgView =（ImageView的）findViewById（R.id.ImageView01）;
imgView.setImageResource（myImageIds [0]）;
画廊=（图库论坛）findViewById（R.id.examplegallery）;
gallery.setAdapter（新AddImgAdp（本））;
gallery.setOnItemClickListener（新OnItemClickListener（）{
公共无效onItemClick（适配器视图父，视图V，INT位置，长的id）{
imgView.setImageResource（myImageIds [位置]）;
}
}）;
}
赶上（例外五）{
Log.e（错误，错误，E）;
} 最后 {
如果（MYDB！= NULL）
myDB.close（）;
}
}
公共类AddImgAdp扩展了BaseAdapter {
INT GalItemBg;
私人语境续;
公共AddImgAdp（上下文C）{
CONT = C;
TypedArray typArray = obtainStyledAttributes（R.styleable.GalleryTheme）;
GalItemBg = typArray.getResourceId（R.styleable.GalleryTheme_android_galleryItemBackground，0）;
typArray.recycle（）;
}
公众诠释getCount将（）{
返回myImageIds.length;
}
公共对象的getItem（INT位置）{
返回的位置;
}
众长getItemId（INT位置）{
返回的位置;
}
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
ImageView的imgView =新ImageView的（续）
imgView.setImageResource（myImageIds [位置]）;
imgView.setLayoutParams（新Gallery.LayoutParams（80，70））;
imgView.setScaleType（ImageView.ScaleType.FIT_XY）;
imgView.setBackgroundResource（GalItemBg）;
返回imgView;
}
}
}
解决方案
没有必要做循环，你必须做出一个适配器并将其设置为您的画廊 的http://saigeethamn.blogspot.com/2010/05/gallery-view-android-developer-tutorial.html
编辑：
在getView（）
cursor.moveToPosition（位置）;
imageView.setImageBitmap（getImageFromBLOB（cursor.getBlob（cursor.getColumnIndex（字段名））））;
方法：从一滴得到位图
公共位图getImageFromBLOB（byte []的mBlob）{
byte []的BB = mBlob;
返回BitmapFactory.de codeByteArray（BB，0，bb.length）;
}
编辑：
@覆盖
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
查看VI = convertView;
ImageView的mImageView;
cursor.moveToPosition（位置）;
如果（convertView == NULL）
{
LayoutInflater INF = mActivity.getLayoutInflater（）;
VI = inf.inflate（R.layout.xxxxxx，NULL）;
mImageView =（ImageView的）vi.findViewById（R.id.imgview_row）;
vi.setTag（mImageView）;
}
其他
mImageView =（ImageView的）vi.getTag（）;
尝试 {
cursor.moveToPosition（位置）;
mImageView.image.setImageBitmap(AllMethod.getImageFromBLOB(cursor.getBlob(cursor.getColumnIndex("fieldname"))));
}赶上（例外五）{
// TODO：处理异常
e.printStackTrace（）;
}
}
返回六;
}
I am new to android development.
My question is i am able to retrieve the data from sqlite database.
i am converting the image data in to image.
I need to retrieve all the images data from database and display as image gallery.
Is there any way to do it.
Below is my code
import java.util.ArrayList;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.TypedArray;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
public class task1images extends Activity {
private Integer[] myImageIds;
private Gallery gallery;
private ImageView imgView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.images);
SQLiteDatabase myDB = this.openOrCreateDatabase("test.db", SQLiteDatabase.OPEN_READWRITE, null);
try{
Cursor c = myDB.rawQuery("select photo from messages where task=1 and photo!=''" , null);
//get the gallery items from the cursor
ArrayList galleryList = new ArrayList();
for(c.moveToFirst();!c.isAfterLast();c.moveToNext()){
Integer gal;
gal = c.getInt(c.getColumnIndex("photo"));
galleryList.add(gal);
}
System.out.println("size:::"+galleryList.size());
myImageIds =(Integer[])galleryList.toArray(new Integer[galleryList.size()]);
System.out.println(myImageIds[0]);
imgView = (ImageView)findViewById(R.id.ImageView01);
imgView.setImageResource(myImageIds[0]);
gallery = (Gallery) findViewById(R.id.examplegallery);
gallery.setAdapter(new AddImgAdp(this));
gallery.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
imgView.setImageResource(myImageIds[position]);
}
});
}
catch(Exception e) {
Log.e("Error", "Error", e);
} finally {
if (myDB != null)
myDB.close();
}
}
public class AddImgAdp extends BaseAdapter {
int GalItemBg;
private Context cont;
public AddImgAdp(Context c) {
cont = c;
TypedArray typArray = obtainStyledAttributes(R.styleable.GalleryTheme);
GalItemBg = typArray.getResourceId(R.styleable.GalleryTheme_android_galleryItemBackground, 0);
typArray.recycle();
}
public int getCount() {
return myImageIds.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imgView = new ImageView(cont);
imgView.setImageResource(myImageIds[position]);
imgView.setLayoutParams(new Gallery.LayoutParams(80, 70));
imgView.setScaleType(ImageView.ScaleType.FIT_XY);
imgView.setBackgroundResource(GalItemBg);
return imgView;
}
}
}
解决方案
No need to do looping, you have make an adapter and set it to your gallery http://saigeethamn.blogspot.com/2010/05/gallery-view-android-developer-tutorial.html
EDITED:
in getView()
cursor.moveToPosition(position);
imageView.setImageBitmap(getImageFromBLOB(cursor.getBlob(cursor.getColumnIndex("fieldname"))));
Method: to get Bitmap from Blob
public Bitmap getImageFromBLOB(byte[] mBlob) {
byte[] bb = mBlob;
return BitmapFactory.decodeByteArray(bb, 0, bb.length);
}
Edited:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
ImageView mImageView;
cursor.moveToPosition(position);
if(convertView==null)
{
LayoutInflater inf=mActivity.getLayoutInflater();
vi=inf.inflate(R.layout.xxxxxx, null);
mImageView=(ImageView)vi.findViewById(R.id.imgview_row);
vi.setTag(mImageView);
}
else
mImageView=(ImageView)vi.getTag();
try {
cursor.moveToPosition(position);
mImageView.image.setImageBitmap(AllMethod.getImageFromBLOB(cursor.getBlob(cursor.getColumnIndex("fieldname"))));
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
return vi;
}
这篇关于如何显示在Android的图片廊的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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