网格视图crashe上滚动太多的图像应用程序 [英] Grid view crashe the app on scrolling on too many images
本文介绍了网格视图crashe上滚动太多的图像应用程序的处理方法，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
在我的项目中使用自定义适配器，网格视图，当我的网格视图负载很多，其中包含了再次滚动我的活动崩溃和重新加载图像的项目。这对加载图像资源的一些问题，我解决了@Raghunandan帮助
我的错误是出memmory的。因为我觉得loadfull尺寸的图像。
公共类MyAdapter扩展ArrayAdapter＆LT; StructureCase＆GT; { 私人LayoutInflater mInflater = NULL;
公共上下文的背景下;
公共类distinationActivity = NULL; 公共MyAdapter（上下文的背景下，INT textViewResourceId，列表与LT; StructureCase＆GT;对象）{
超（背景下，textViewResourceId，对象）;
mInflater = LayoutInflater.from（上下文）;
// mInflater =（LayoutInflater）G.currentActivity.getSystemService（Context.LAYOUT_INFLATER_SERVICE）; } 公共静态类ViewHolder {
公共ImageView的gem_img = NULL;
公众的TextView gem_name = NULL;
} @覆盖
公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
最后ViewHolder viewHolder;
最终视图V; 最后StructureCase项目=的getItem（位置）; 如果（convertView == NULL）{ convertView = this.mInflater.inflate（R.layout.my_grid_list，NULL）;
// mInflater =（LayoutInflater）G.currentActivity.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
convertView = mInflater.inflate（R.layout.my_grid_list，父母，假）;
viewHolder =新ViewHolder（）;
convertView.setTag（viewHolder）; viewHolder.gem_img =（ImageView的）convertView.findViewById（R.id.imageView_mygrid_list）;
viewHolder.gem_name =（TextView中）convertView.findViewById（R.id.textView_mygrid_list）; viewHolder.gem_name.setTypeface（G.typeFacePrs）; }其他{
viewHolder =（ViewHolder）convertView.getTag（）;
} INT温度= 0; viewHolder.gem_name.setText（item.g_name）;
INT ID = G.currentActivity.getResources（）则getIdentifier（item.g_image，可拉伸，G.currentActivity.getPackageName（））。
可绘制可绘制= G.currentActivity.getResources（）getDrawable（ID）。
如果（绘！= NULL）{
viewHolder.gem_img.setImageDrawable（绘制）;
}其他{
viewHolder.gem_img.setImageResource（R.drawable.almas）; } //viewHolder.newsThumb.setImageResource(temp）; viewHolder.gem_img.setOnClickListener（新OnClickListener（）{
@覆盖
公共无效的onClick（视图v）{
}
}）; 返回convertView;
} @覆盖
众长getItemId（INT位置）{
返回的位置;
}
解决方案
在 getview方法使用该code到，同时设置位图的ImageView 。
私人位图德codeURI（URI selectedImage）抛出FileNotFoundException异常
{
BitmapFactory.Options O =新BitmapFactory.Options（）;
o.inJustDe codeBounds = TRUE;
BitmapFactory.de codeStream（
。getContentResolver（）openInputStream（selectedImage），空，O）; 最终诠释REQUIRED_SIZE = 800; INT width_tmp = o.outWidth，height_tmp = o.outHeight;
int标= 1;
而（真）{
如果（width_tmp / 2'; REQUIRED_SIZE || height_tmp / 2版; REQUIRED_SIZE）
{
打破;
}
width_tmp / = 2;
height_tmp / = 2;
规模* = 2;
} BitmapFactory.Options O2 =新BitmapFactory.Options（）;
o2.inSampleSize =规模;`输入code here`
返回BitmapFactory.de codeStream（
getContentResolver（）openInputStream（selectedImage），空，O2）。
}
in my project that uses custom adapter with grid view , when my grid view load many Items that contain images on scrolling my activity crashes and reloads again. it had some resource problem on loading image that i solved with help of @Raghunandan my error is out of memmory. cause i think loadfull size images.
public class MyAdapter extends ArrayAdapter<StructureCase> {
private LayoutInflater mInflater = null;
public Context context;
public Class distinationActivity = null;
public MyAdapter(Context context, int textViewResourceId, List<StructureCase> objects) {
super(context, textViewResourceId, objects);
mInflater = LayoutInflater.from(context);
// mInflater = (LayoutInflater)G.currentActivity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public static class ViewHolder {
public ImageView gem_img = null;
public TextView gem_name = null;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder viewHolder;
final View v;
final StructureCase item = getItem(position);
if (convertView == null) {
convertView = this.mInflater.inflate(R.layout.my_grid_list, null);
//mInflater = (LayoutInflater)G.currentActivity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.my_grid_list, parent, false);
viewHolder = new ViewHolder();
convertView.setTag(viewHolder);
viewHolder.gem_img = (ImageView) convertView.findViewById(R.id.imageView_mygrid_list);
viewHolder.gem_name = (TextView) convertView.findViewById(R.id.textView_mygrid_list);
viewHolder.gem_name.setTypeface(G.typeFacePrs);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
int temp = 0;
viewHolder.gem_name.setText(item.g_name);
int id = G.currentActivity.getResources().getIdentifier(item.g_image, "drawable", G.currentActivity.getPackageName());
Drawable drawable = G.currentActivity.getResources().getDrawable(id);
if(drawable != null){
viewHolder.gem_img.setImageDrawable(drawable);
}else{
viewHolder.gem_img.setImageResource(R.drawable.almas);
}
//viewHolder.newsThumb.setImageResource(temp);
viewHolder.gem_img.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
}
});
return convertView;
}
@Override
public long getItemId(int position) {
return position;
}
解决方案
Use this code to in your getview method while setting bitmap in ImageView.
private Bitmap decodeUri(Uri selectedImage) throws FileNotFoundException
{
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(
getContentResolver().openInputStream(selectedImage), null, o);
final int REQUIRED_SIZE = 800;
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp / 2 < REQUIRED_SIZE || height_tmp / 2 < REQUIRED_SIZE)
{
break;
}
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;`enter code here`
return BitmapFactory.decodeStream(
getContentResolver().openInputStream(selectedImage), null, o2);
}
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