핸드폰 폴더에 있는 사진을 가져와 그리드뷰에 뿌릴려고 합니다.
현재 그리드뷰에 사진은 뿌려지는데 스크롤이 버벅거리면서 다음 사진으로 넘어가는게 많이 느립니다.
제가 만든 소스에서 추가사항으로 넣어야 하는게 있는지,
아니면 다른 방법으로 적용해야 하는지 감이 잡히지 않아 도움을 요청드려 봅니다.
부족한 점이 많은 초보개발자라 예제 위주로 가르쳐주시면 감사하겠습니다.
package com.example.seesaw;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.Toast;
public class DataIn extends Activity implements OnClickListener{
String sessionid;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.datain);
Intent intent1 = getIntent();
sessionid = intent1.getExtras().getString("sessionid");
GridView gridView = (GridView)findViewById(R.id.gridView1);
gridView.setAdapter(new ImageAdapter(this));
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(DataIn.this, ""+position, Toast.LENGTH_SHORT).show();
}
});
}
@Override
public void onClick(View v) {
}
}
package com.example.seesaw;
import java.io.File;
import java.io.IOException;
import java.util.Locale;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.view.WindowManager;
public class ImageAdapter extends BaseAdapter{
private Context mContext;
String [] filename, filepath;
int k;
int orientation, rotation;
Bitmap bitmap, rotateBitmap, resizebitmap, cutbitmap;
ImageView imageView;
public ImageAdapter(Context c) {
mContext = c;
}
@Override
public int getCount() {
imagesetting();
return k;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
int height, width;
@Override
public View getView(int position, View convertView, ViewGroup parent) {
height = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getHeight();
width = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getWidth();
if(convertView == null){
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(width*212/720,height*212/1280));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
}else{
imageView = (ImageView)convertView;
}
imageView.setBackgroundResource(R.drawable.photo_frame);
imageView.setImageBitmap(bitmapcreate(position));
return imageView;
}
public void imagesetting(){
filename = null;
filepath = null;
File f = new File(Environment.getExternalStorageDirectory()+"/DCIM/Camera1/");
File[] files = f.listFiles();
k = 0;
filename = new String[files.length];
filepath = new String[files.length];
for(int i=0;i<files.length;i++){
File file = files[i];
String curFile = file.getPath();
String ext = curFile.substring(curFile.lastIndexOf(".")+1,curFile.length()).toLowerCase(Locale.KOREA);
if(ext.equals("jpg") || ext.equals("jpeg") || ext.equals("gif") || ext.equals("png")){
filename[k] = file.getName();
filepath[k] = file.getPath();
k = k + 1;
}
}
}
public Bitmap bitmapcreate(int i){
bitmap = null;
rotateBitmap = null;
resizebitmap = null;
cutbitmap = null;
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filepath[i], bmOptions);
bmOptions.inJustDecodeBounds = false;
if (bmOptions.outWidth > 1600) {
bmOptions.inSampleSize = 8;
} else {
bmOptions.inSampleSize = 2;
}
bmOptions.inPurgeable = true;
bitmap = BitmapFactory.decodeFile(filepath[i], bmOptions);
try {
ExifInterface mExif = new ExifInterface(filepath[i]);
orientation = Integer.parseInt(mExif.getAttribute(ExifInterface.TAG_ORIENTATION));
} catch (IOException e){
Log.i("IOException e :",""+e);
e.printStackTrace();
} catch (Exception e){
Log.i("Exception e :",""+e);
}
if (orientation == 6){
rotation = 90;
} else if (orientation == 8){
rotation = 270;
} else if (orientation == 3){
rotation = 180;
} else if ((orientation == 1) || (orientation == 0)){
rotation = 0;
}
Matrix matrix = new Matrix();
matrix.postRotate(rotation);
rotateBitmap = Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix,true);
if(bitmap.getWidth() > bitmap.getHeight()){ // 기본 가로가 긴 사진
if(rotation == 0 || rotation == 180){ // 회전값이 0 또는 180 인 사진 (가로)
resizebitmap = Bitmap.createScaledBitmap(rotateBitmap, (int)((212*rotateBitmap.getWidth()/rotateBitmap.getHeight())*width/720), (int)(212*height/1280), true);
cutbitmap = Bitmap.createBitmap(resizebitmap, ((resizebitmap.getWidth()-resizebitmap.getHeight())/2), 0, (int)(212*width/720), (int)(212*height/1280));
} else if(rotation == 90 || rotation == 270){ // 회전값이 90 또는 270인 사진 (세로가 누운 사진)
resizebitmap = Bitmap.createScaledBitmap(rotateBitmap, (int)(212*width/720), (int)((212*rotateBitmap.getHeight()/rotateBitmap.getWidth())*height/1280), true);
cutbitmap = Bitmap.createBitmap(resizebitmap, 0, ((resizebitmap.getHeight()-resizebitmap.getWidth())/2), (int)(212*width/720), (int)(212*height/1280));
}
} else if(bitmap.getWidth() < bitmap.getHeight()){ // 기본 세로가 긴 사진
if(rotation == 0 || rotation == 180){
resizebitmap = Bitmap.createScaledBitmap(rotateBitmap, (int)(212*width/720), (int)((212*rotateBitmap.getHeight()/rotateBitmap.getWidth())*height/1280), true);
cutbitmap = Bitmap.createBitmap(resizebitmap, 0,((resizebitmap.getHeight()-resizebitmap.getWidth())/2), (int)(212*width/720), (int)(212*height/1280));
} else if(rotation == 90 || rotation == 270){
}
} else if(bitmap.getWidth() == bitmap.getHeight()){ // 기본 정사각형 사진
if(rotation == 0 || rotation == 180){
resizebitmap = Bitmap.createScaledBitmap(rotateBitmap, (int)(212*width/720), (int)(212*height/1280), true);
cutbitmap = Bitmap.createBitmap(resizebitmap, 0, 0, (int)(212*width/720), (int)(212*height/1280));
} else if(rotation == 90 || rotation == 270){
}
}
bitmap = cutbitmap;
return bitmap;
}
}
