我有一个图像库，用于显示再循环视图中的图像，使用滑动并通过单击Recyclerview中的每个图像，该图像在视图寻呼机中打开。一切都很好，一开始，recyclerview很好，在viewpager中打开的图像和在viewpager中滑动都很好。但当我按下关闭viewpager和goback到recyclerview突然分配的内存增加到约400 MB！ 有8个图像约490 * 420像素和72 KB大小 MainGallery.xml
<android.support.v7.widget.RecyclerView
android:id="@+id/recView_Gallery1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"
>
</android.support.v7.widget.RecyclerView>
<Button
android:id="@+id/btn_retry_Gallery"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="تلاش مجدد"
android:textSize="16sp"
android:visibility="gone"
android:layout_gravity="center"
android:gravity="center"/>
</android.support.design.widget.CoordinatorLayout>
GalleryEnter.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorAccent">
<ImageView
android:id="@+id/iv_photoGallety"
android:adjustViewBounds="true"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:layout_margin="2dp"
android:layout_width="match_parent"
android:background="@android:color/white"/>
</LinearLayout>
ImageDetail.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorAccent"
tools:context="com.parsroyan.restaurant.imageDetailActivity">
<android.support.v4.view.ViewPager
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.design.widget.CoordinatorLayout>
MainGalleryActivity.java
public class GalleryMain_Activity extends AppCompatActivity {
public static final int CONNECTION_TIMEOUT = 10000;
public static final int READ_TIMEOUT = 15000;
public static RecyclerView recListMenuTypes;
public static ImageAdapter mta;
ArrayList<ImageGallery> data = new ArrayList<>();
Button btn_retry;
TextView tv_message;
ImageView imv_message;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gallery_main_);
btn_retry = (Button) findViewById(R.id.btn_retry_Gallery);
recListMenuTypes = (RecyclerView) findViewById(R.id.recView_Gallery1)
;
recListMenuTypes.setHasFixedSize(true);
GridLayoutManager mLayoutManager = new
GridLayoutManager(GalleryMain_Activity.this, 2);
recListMenuTypes.setLayoutManager(mLayoutManager);
//LinearLayoutManager llm = new
LinearLayoutManager(GalleryMain_Activity.this);
//llm.setOrientation(LinearLayoutManager.VERTICAL);
//recListMenuTypes.setLayoutManager(llm);
recListMenuTypes.setItemAnimator(new DefaultItemAnimator());
mta = new ImageAdapter(GalleryMain_Activity.this, data);
recListMenuTypes.setAdapter(mta);
Check_Connection_Retrive();
btn_retry.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Check_Connection_Retrive();
}
});
}
private void alertView1(String message,boolean success) {
final TypedArray styledAttributes =
GalleryMain_Activity.this.getTheme().obtainStyledAttributes(new int[] {
android.R.attr.actionBarSize });
int Y = (int) styledAttributes.getDimension(0, 0);
styledAttributes.recycle();
LayoutInflater inflater = getLayoutInflater();
View toastLayout = inflater.inflate(R.layout.custom_toast,
(ViewGroup)
findViewById(R.id.custom_toast_layout));
tv_message = (TextView)
toastLayout.findViewById(R.id.custom_toast_message);
tv_message.setText(message);
Toast toast = new Toast(getApplicationContext());
toast.setDuration(Toast.LENGTH_LONG);
toast.setGravity(Gravity.TOP | Gravity.START |
Gravity.FILL_HORIZONTAL,0,Y);
toast.setView(toastLayout);
imv_message = (ImageView)
toastLayout.findViewById(R.id.custom_toast_image);
if(!success){
toastLayout.setBackgroundColor(Color.parseColor("#cc0000"));
imv_message.setBackgroundResource(android.R.drawable.ic_dialog_alert);
}
else {
imv_message.setBackgroundResource(android.R.drawable.ic_dialog_info);
}
toastLayout.setAlpha(.8f);
toast.show();
}
public void Check_Connection_Retrive()
{
if(InternetConnection.checkConnection(getApplicationContext(),this))
{
btn_retry.setVisibility(View.GONE);
new FetchGallery().execute();
}
else
{
btn_retry.setVisibility(View.VISIBLE);
}
}
@Override
public void onBackPressed() {
super.onBackPressed();
}
private class FetchGallery extends AsyncTask<String, String, String> {
TransparentProgressDialog pdLoading = new
TransparentProgressDialog
(GalleryMain_Activity.this,R.drawable.progress_circle);
HttpURLConnection conn;
URL url = null;
@Override
protected void onPreExecute() {`enter code here`
super.onPreExecute();
//pdLoading.setMessage("\tLoading...");
pdLoading.setCancelable(false);
//pdLoading.setProgress(10);
pdLoading.show();
}
@Override
protected String doInBackground(String... params) {
try {
url = new URL("My_URL");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "1";
}
try {
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(READ_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("GET");
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return "2";
}
try {
int response_code = conn.getResponseCode();
// Check if successful connection made
if (response_code == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
StringBuilder result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
// Pass data to onPostExecute method
return (result.toString());
} else {
return "3";
}
} catch (IOException e) {
return "4";
} finally {
conn.disconnect();
}
}
@Override
protected void onPostExecute(String result) {
//this method will be running on UI thread
pdLoading.dismiss();
switch(result) {
case "1":
break;
case "2":
break;
case "3":
break;
case "4":
break;
default:
try {
btn_retry.setVisibility(View.GONE);
JSONArray jArray = new JSONArray(result);
for (int i = 0; i < jArray.length(); i++) {
//JSONObject json_data = jArray.getJSONObject(i);
ImageGallery image = new ImageGallery();
//image.name = json_data.getString("name");
image.title = jArray.get(i).toString();
image.url = "MY_URL" + image.title;
data.add(image);
}
// Setup and Handover data to recyclerview
mta.notifyDataSetChanged();
recListMenuTypes.addOnItemTouchListener(new
RecyclerViewTouchListener(getApplicationContext(), recListMenuTypes, new
RecyclerViewClickListener() {
@Override
public void onClick(View view, int position) {
Intent intent = new Intent(GalleryMain_Activity.this,
imageDetailActivity.class);
intent.putParcelableArrayListExtra("data", data);
intent.putExtra("pos", position);
startActivity(intent);
}
@Override
public void onLongClick(View view, int position){
}
}));
} catch (JSONException e) {
Toast.makeText(GalleryMain_Activity.this,
e.toString(), Toast.LENGTH_LONG).show();
}
}
}
}
}
ImageAdapter.java
public class ImageAdapter extends
RecyclerView.Adapter<ImageAdapter.MenuViewHolder> {
private List<ImageGallery> imageGalleryList;
private Context context;
protected int lastPosition = -1;
public ImageAdapter(Context Context,List<ImageGallery> contactList)
{
this.imageGalleryList = contactList;
this.context = Context;
}
@Override
public int getItemCount() {
return imageGalleryList.size();
}
@Override
public void onBindViewHolder(ImageAdapter.MenuViewHolder menuViewHolder,
int i) {
final ImageGallery m = imageGalleryList.get(i);
Glide.with(context).load("MyURL"+m.title)
.thumbnail(.1f)
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.SOURCE)
.override(200,200).placeholder(R.drawable.logoback)
.into(menuViewHolder.vImage);
setFadeAnimation(menuViewHolder,i);
}
@Override
public int getItemViewType(int position) {
return super.getItemViewType(position);
}
@Override
public ImageAdapter.MenuViewHolder onCreateViewHolder(ViewGroup
viewGroup, int i) {
final View itemView = LayoutInflater.
from(viewGroup.getContext()).
inflate(R.layout.activity_gallery_enter, viewGroup, false);
return new ImageAdapter.MenuViewHolder(itemView);
}
@Override
public void onViewDetachedFromWindow(ImageAdapter.MenuViewHolder holder)
{
((ImageAdapter.MenuViewHolder)holder).itemView.clearAnimation();
}
public class MenuViewHolder extends RecyclerView.ViewHolder{
protected ImageView vImage;
public MenuViewHolder(View v) {
super(v);
vImage = (ImageView) v.findViewById(R.id.iv_photoGallety);
}
}
private void setFadeAnimation(ImageAdapter.MenuViewHolder view, int
position) {
if (position > lastPosition) {
AlphaAnimation anim = new AlphaAnimation(0.0f, 2.0f);
anim.setDuration(1000);
view.itemView.startAnimation(anim);
lastPosition = position;
}
}
}
ImageDetailActivity.java
public class imageDetailActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
public ArrayList<ImageGallery> data = new ArrayList<>();
int pos;
Toolbar aboveToolbar;
/**
* The {@link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_detail);
//aboveToolbar = (android.support.v7.widget.Toolbar) findViewById(R.id.detail_toolbar);
//setSupportActionBar(aboveToolbar);
//getSupportActionBar().setDisplayHomeAsUpEnabled(true);
data = getIntent().getParcelableArrayListExtra("data");
pos = getIntent().getIntExtra("pos", 0);
setTitle(data.get(pos).getName());
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager(), data);
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setPageTransformer(true, new DepthPageTransformer());
mViewPager.setAdapter(mSectionsPagerAdapter);
mViewPager.setCurrentItem(pos);
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
//noinspection ConstantConditions
setTitle(data.get(position).getName());
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public ArrayList<ImageGallery> data = new ArrayList<>();
public SectionsPagerAdapter(FragmentManager fm, ArrayList<ImageGallery> data) {
super(fm);
this.data = data;
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position, data.get(position).getName(), data.get(position).getUrl());
}
@Override
public int getCount() {
// Show 3 total pages.
return data.size();
}
// @Override
//public CharSequence getPageTitle(int position) {
//return data.get(position).getName();
// }
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
String name, url;
ImageView ImageView;
int pos;
private static final String ARG_SECTION_NUMBER = "section_number";
//private static final String ARG_IMG_TITLE = "image_title";
private static final String ARG_IMG_URL = "image_url";
@Override
public void setArguments(Bundle args) {
super.setArguments(args);
this.pos = args.getInt(ARG_SECTION_NUMBER);
//this.name = args.getString(ARG_IMG_TITLE);
this.url = args.getString(ARG_IMG_URL);
}
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber, String name, String url) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
//args.putString(ARG_IMG_TITLE, name);
args.putString(ARG_IMG_URL, url);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public void onStart() {
super.onStart();
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_image_detail, container, false);
this.ImageView = (ImageView) rootView.findViewById(R.id.detail_image);
Glide.with(getActivity()).load(url).thumbnail(0.1f).crossFade()
.diskCacheStrategy(DiskCacheStrategy.SOURCE)
.override(200,200).placeholder(R.drawable.tiara3)
.into(this.ImageView);
return rootView;
}
}
}
错误日志：
E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:501)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:354)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:785)
at android.content.res.Resources.loadDrawable(Resources.java:1970)
at android.content.res.Resources.getDrawable(Resources.java:660)
at com.bumptech.glide.request.GenericRequest.getPlaceholderDrawable(GenericRequest.java:416)
at com.bumptech.glide.request.GenericRequest.clear(GenericRequest.java:323)
at com.bumptech.glide.request.ThumbnailRequestCoordinator.clear(ThumbnailRequestCoordinator.java:106)
at com.bumptech.glide.manager.RequestTracker.clearRequests(RequestTracker.java:94)
at com.bumptech.glide.RequestManager.onDestroy(RequestManager.java:221)
at com.bumptech.glide.manager.ActivityFragmentLifecycle.onDestroy(ActivityFragmentLifecycle.java:64)
at com.bumptech.glide.manager.SupportRequestManagerFragment.onDestroy(SupportRequestManagerFragment.java:147)
at android.support.v4.app.Fragment.performDestroy(Fragment.java:2322)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1240)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1272)
at android.support.v4.app.FragmentManagerImpl.dispatchDestroy(FragmentManager.java:2186)
at android.support.v4.app.FragmentController.dispatchDestroy(FragmentController.java:271)
at android.support.v4.app.FragmentActivity.onDestroy(FragmentActivity.java:388)
at android.support.v7.app.AppCompatActivity.onDestroy(AppCompatActivity.java:209)
at android.app.Activity.performDestroy(Activity.java:5273)
at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1110)
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3438)
at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3469)
at android.app.ActivityThread.access$1200(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1287)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
真实设备结果： enter image description here smulator结果： enter image description here
答案 0 :(得分：0)
在Menifest文件中的Application标记中添加以下行：
android:largeHeap="true"