Android的viewpager出内存 [英] android viewpager out of memory
本文介绍了Android的viewpager出内存的处理方法，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
首先，我想说，英语不是我的母语。所以，请原谅我的错误。
first i would like to say that english is not my native language. So please forgive me my mistakes.
要我的问题：我有一个 ViewPager 10个页面和标签。第一窗口是用于设置和其它的是问题
To my problem: I have a ViewPager with 10 pages and tabs. The first window is for setting and the others are questions.
您开始第一个问题，我显示的图像，如果你点击是，否，那么你去那里的第二个图所示用另外一个问题下一个页面。
You start with the first question and i show an image, if you click "yes" "no" then you go to the next page where the second picture is shown with another question.
我每次得到的OOM错误（我得到的第7页）。我读了一些关于它的窍门我现在我使用位图德codeR每次我的形象绑定到我的的ImageView 。但是，不要太大的帮助。我仍然有同样的问题。我去codeR具有 * inPurgeable = TRUE;
I get everytime the oom error (as i get to the 7 page). I read some tipps about it i now i use bitmap decoder everytime i bind the image to my ImageView. But that dont help much. I still have the same problem. My decoder has *.inPurgeable = true;
我知道有改变你的manifest.xml让更多的堆大小的选项，但我认为这只会延缓错误。可有人去翻我的code，请告诉我的东西，我做错了。因为在我看来不错，但因为我是新来的节目我可以做出一些大错误：）
I know there is an option to change your manifest.xml to allow more heap size but i think that will only delay the error. Can someone look through my code please and tell me something that i am doing wrong. Cause it seems to me fine but cause i am new to programming i could have made some big mistakes :)
我viewpager与适配器：
My viewpager with the adapter:
public class WaldViewPager extends FragmentActivity implements ActionBar.TabListener {
private static AppSectionsPagerAdapter mAppSectionsPagerAdapter;
static private ViewPager mViewPager;
private static Context context;
public static int bitmap;
private int width, height;
private ViewGroup rootWald;
private static int textSize = 0;
private Dialog dialog;
public static int lastUsed = 1;
private static int ergebnis = 0;
private static int[] fragenListe = new int[8];
private static int[] antworten = new int[9];
public static void setErgebnis(int zahl){
ergebnis = zahl;
}
public static int getErgebnis(){
return ergebnis;
}
public static void setAntwort(int position, int antwort){
antworten[position-1] = antwort;
}
public static int getAntwort(int position){
return antworten[position-1];
}
public static void setPage(int position){
mViewPager.setCurrentItem(position, true);
}
public static int getPage(){
return mViewPager.getCurrentItem();
}
private void resetListe(){
for(int i=0; i<fragenListe.length; i++){
fragenListe[i]=0;
}
}
private void resetAntworten(){
for(int i=0; i<antworten.length; i++){
antworten[i]=0;
}
}
public static boolean getFrage(int position){
if(fragenListe[position-2] == 1){
return true;
}else{
return false;
}
}
public static void setPageVisible(int position, boolean status){
if(status == true){
fragenListe[position-2] = 1;
}else if(status == false){
fragenListe[position-2] = 0;
}
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_viewpager);
overridePendingTransition(R.anim.fade_out, R.anim.fade_in);
mAppSectionsPagerAdapter = new AppSectionsPagerAdapter(getSupportFragmentManager());
WaldViewPager.context = getApplicationContext();
berechneSchriftgroese();
setupHelpInfoDialog();
resetListe();
resetAntworten();
rootWald = (ViewGroup) findViewById(R.id.toast_layout_root);
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.setLogo(R.drawable.fake);
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mAppSectionsPagerAdapter);
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position){
actionBar.getTabAt(position).select();
ViewParent root = findViewById(android.R.id.content).getParent();
findAndUpdateSpinner(root, position);
}
private boolean findAndUpdateSpinner(Object root, int position){
if (root instanceof android.widget.Spinner){
Spinner spinner = (Spinner) root;
spinner.setSelection(position);
return true;
}else if (root instanceof ViewGroup){
ViewGroup group = (ViewGroup) root;
if (group.getId() != android.R.id.content){
for (int i = 0; i < group.getChildCount(); i++){
if (findAndUpdateSpinner(group.getChildAt(i), position)){
return true;
}
}
}
}
return false;
}
});
for (int i = 0; i < mAppSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(actionBar.newTab().setText(mAppSectionsPagerAdapter.getPageTitle(i)).setTabListener(this));
}
mViewPager.setCurrentItem(1, true);
}
@Override
public void onBackPressed() {
if (mViewPager.getCurrentItem() == 1) {
super.onBackPressed();
} else {
mViewPager.setCurrentItem(1, true);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.bottom_bar_frage, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_settings_frage:
if(mViewPager.getCurrentItem()==0){
mViewPager.setCurrentItem(lastUsed, true);
}else{
lastUsed = mViewPager.getCurrentItem();
mViewPager.setCurrentItem(0, true);
}
return true;
case R.id.menu_info:
dialog.show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void setupHelpInfoDialog(){
dialog = new Dialog(WaldViewPager.this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setCancelable(true);
dialog.setContentView(R.layout.dialog_info);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
TextView text = (TextView) dialog.findViewById(R.id.dialog_ueberschrift);
text.setText("Bedienung der App");
if(MainViewPager.getTextSize()!=0){
text.setTextSize(text.getTextSize()-MainViewPager.getTextSize());
}
text = (TextView) dialog.findViewById(R.id.dialog_text1);
text.setText("-Wischfunktion:");
if(MainViewPager.getTextSize()!=0){
text.setTextSize(text.getTextSize()-MainViewPager.getTextSize());
}
text = (TextView) dialog.findViewById(R.id.dialog_text1_sub);
text.setText("Zum Navigieren können Sie entweder auf die Tabs zurückgreifen oder Sie wischen das Fenster links oder rechts");
if(MainViewPager.getTextSize()!=0){
text.setTextSize(text.getTextSize()-MainViewPager.getTextSize());
}
text = (TextView) dialog.findViewById(R.id.dialog_text2);
text.setText("-Zoomfunktion:");
if(MainViewPager.getTextSize()!=0){
text.setTextSize(text.getTextSize()-MainViewPager.getTextSize());
}
text = (TextView) dialog.findViewById(R.id.dialog_text2_sub);
text.setText("Wenn Sie auf das Bild klicken, können Sie es mit 2 Fingern vergrößern bzw. verkleinern");
if(MainViewPager.getTextSize()!=0){
text.setTextSize(text.getTextSize()-MainViewPager.getTextSize());
}
text = (TextView) dialog.findViewById(R.id.dialog_text3);
text.setText("-Erklärungshilfe:");
if(MainViewPager.getTextSize()!=0){
text.setTextSize(text.getTextSize()-MainViewPager.getTextSize());
}
text = (TextView) dialog.findViewById(R.id.dialog_text3_sub);
text.setMovementMethod(LinkMovementMethod.getInstance());
text.setText(ClickableText.addClickablePart("Damit Sie wenig Zeit beim Suchen der Fremd/Fachwörtern verlieren, können Sie Wörter wie \u200EClypeus\u200E direkt hier nachschlagen", context, rootWald), BufferType.SPANNABLE);
if(MainViewPager.getTextSize()!=0){
text.setTextSize(text.getTextSize()-MainViewPager.getTextSize());
}
ImageView bild = (ImageView) dialog.findViewById(R.id.dialog_bild1);
ImageView bild = (ImageView) dialog.findViewById(R.id.dialog_bild1);
bild.setImageBitmap(DecodeImage.decode(bild.getContext().getResources(), R.drawable.swipe));
bild = (ImageView) dialog.findViewById(R.id.dialog_bild2);
bild.setImageBitmap(DecodeImage.decode(bild.getContext().getResources(),
R.drawable.swipe_bild));
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
mViewPager.setCurrentItem(tab.getPosition(), true);
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
AppSectionsPagerAdapter
AppSectionsPagerAdapter
public static class AppSectionsPagerAdapter extends FragmentStatePagerAdapter {
public AppSectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public Fragment getItem(int i) {
switch (i) {
case 0:
return new SettingsFrage();
case 1:
return new FrageA();
case 2:
return new FrageB();
case 3:
return new FrageC();
case 4:
return new FrageD();
case 5:
return new FrageE();
case 6:
return new FrageF();
case 7:
return new FrageG();
case 8:
return new FrageH();
case 9:
return new FrageI();
}
return null;
}
@Override
public int getCount() {
return 10;
}
@Override
public float getPageWidth(int position) {
if(position == 0){
return super.getPageWidth(position)*0.6f;
}
return super.getPageWidth(position);
}
@Override
public CharSequence getPageTitle(int position) {
switch(position){
case 0:
return "Settings";
case 1:
return "Einkerbung";
case 2:
return "Einbuchtung";
case 3:
return "Farbe";
case 4:
return "Stirndreieck";
case 5:
return "Haare";
case 6:
return "Beborstung";
case 7:
return "Hinterhaupt";
case 8:
return "Pigmentierung";
case 9:
return "Mesosoma";
}
return null;
}
}
public static Context getContext(){
return WaldViewPager.context;
}
public static int getTextSize(){
return textSize;
}
private void berechneSchriftgroese(){
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
width = size.x;
height = size.y;
if(width<=480 || height<=480){
textSize = 12;
}
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
overridePendingTransition(R.anim.fade_out, R.anim.fade_in);
}
}
我的一个问题：
public class FrageB extends Fragment implements OnClickListener{
public static ImageView bild;
public static TextView ueberschrift, frage, frageZusatz1, frageZusatz2;
public static View viewA, viewB, viewC;
public static RadioButton auswahlA, auswahlB, auswahlC;
String stringUeberschrift = "Einbuchtung";
String stringFrage = "Welche Form hat der Hinterrand des Kopfes?";
String stringAuswahlA = "keine Delle";
String stringAuswahlB = "Delle";
String stringAuswahlC = "unsicher";
String stringFrageZusatz1 = "keine Delle: nicht oder nur schwach eingebuchtet, keine deutliche Delle";
String stringFrageZusatz2 = "Delle: tief eingebuchtet, deutliche Delle";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fake_frage, container, false);
ViewGroup root = (ViewGroup) v.findViewById(R.id.toast_layout_root);
bild = (ImageView) v.findViewById(R.id.frage_bild);
frage = (TextView) v.findViewById(R.id.frage_frage);
ueberschrift = (TextView) v.findViewById(R.id.frage_ueberschrift);
auswahlA = (RadioButton) v.findViewById(R.id.frage_auswahl1);
auswahlB = (RadioButton) v.findViewById(R.id.frage_auswahl2);
auswahlC = (RadioButton) v.findViewById(R.id.frage_auswahl3);
frageZusatz1 = (TextView) v.findViewById(R.id.frage_zusatz1);
frageZusatz2 = (TextView) v.findViewById(R.id.frage_zusatz2);
viewA = (View) v.findViewById(R.id.fake_view1);
viewB = (View) v.findViewById(R.id.fake_view2);
viewC = (View) v.findViewById(R.id.fake_view3);
auswahlC.setEnabled(false);
bild.setOnClickListener(this);
auswahlA.setOnClickListener(this);
auswahlB.setOnClickListener(this);
auswahlC.setOnClickListener(this);
auswahlA.setEnabled(false);
auswahlB.setEnabled(false);
bild.setClickable(false);
if(WaldViewPager.getFrage(2)){
ZeigeFrage.unhide(2);
}
ueberschrift.setMovementMethod(LinkMovementMethod.getInstance());
frage.setMovementMethod(LinkMovementMethod.getInstance());
frageZusatz1.setMovementMethod(LinkMovementMethod.getInstance());
frageZusatz2.setMovementMethod(LinkMovementMethod.getInstance());
frageZusatz1.setText(ClickableText.addClickablePart(stringFrageZusatz1, WaldViewPager.getContext(), root), BufferType.SPANNABLE);
frageZusatz2.setText(ClickableText.addClickablePart(stringFrageZusatz2, WaldViewPager.getContext(), root), BufferType.SPANNABLE);
auswahlA.setText(stringAuswahlA);
auswahlB.setText(stringAuswahlB);
auswahlC.setText(stringAuswahlC);
ueberschrift.setText(ClickableText.addClickablePart(stringUeberschrift, WaldViewPager.getContext(), root), BufferType.SPANNABLE);
frage.setText(ClickableText.addClickablePart(stringFrage, WaldViewPager.getContext(), root), BufferType.SPANNABLE);
if(WaldViewPager.getTextSize()!=0){
auswahlA.setTextSize(auswahlA.getTextSize()-WaldViewPager.getTextSize());
auswahlB.setTextSize(auswahlB.getTextSize()-WaldViewPager.getTextSize());
auswahlC.setTextSize(auswahlC.getTextSize()-WaldViewPager.getTextSize());
ueberschrift.setTextSize(ueberschrift.getTextSize()-WaldViewPager.getTextSize());
frage.setTextSize(frage.getTextSize()-WaldViewPager.getTextSize());
frageZusatz1.setTextSize(frageZusatz1.getTextSize()-WaldViewPager.getTextSize());
frageZusatz2.setTextSize(frageZusatz2.getTextSize()-WaldViewPager.getTextSize());
}
return v;
}
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser) {
if(WaldViewPager.getFrage(2)){
ZeigeFrage.unhide(2);
}
}
}
@Override
public void onClick(View v) {
if(v == bild){
Intent intent = new Intent(WaldViewPager.getContext(), ShowImage.class);
WaldViewPager.bitmap = R.drawable.frage2;
startActivity(intent);
}
if(v == auswahlA){
WaldViewPager.setAntwort(WaldViewPager.getPage(), 1);
WaldViewPager.setPageVisible(3, true);
WaldViewPager.setErgebnis(0);
WaldViewPager.setPage(3);
}
if(v == auswahlB){
//coptoformica
WaldViewPager.setAntwort(WaldViewPager.getPage(), 2);
WaldViewPager.setErgebnis(2);
Intent intent = new Intent(WaldViewPager.getContext(), ErgebnisB.class);
startActivity(intent);
}
if(v == auswahlC){
}
}
}
我去$ C $的CImage
My decodeImage
public class DecodeImage {
public static Bitmap decode(Resources res, int resId){
BitmapFactory.Options bfOptions=new BitmapFactory.Options();
bfOptions.inDither = false;
bfOptions.inPurgeable = true;
bfOptions.inInputShareable = true;
bfOptions.inTempStorage = new byte[32 * 1024];
return BitmapFactory.decodeResource(res, resId, bfOptions);
}
}
我想AP preciate任何帮助。随时要求超过code的撕成小块。
这个程序能正常工作在某些设备上但在其他没有。已成为一些与堆大小的变化我猜。
I would appreciate any help. feel free to ask for over peaces of code. this app works fine on some devices but on other not. has to be something with heap size change i guess.
编辑：找到了解决办法。
与 bitmap.recycle答案（）的作品，但由于我的code的艺术，我是懒得换了很多，我用别的东西。
found the solution.
the answer with the bitmap.recycle() works but due to my art of code i was lazy to change a lot and i used something else.
为 ViewPager 的Android为您提供了
as for ViewPager android provides you with
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
}
我升级行
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser) {
//if you can see the fragment
}else{
//if you dont
}
}
到
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser) {
//if you can see the fragment
}else{
//if you dont
imageViewToDelete.setImageDrawable(null); //this is ImageView from Fragment
}
}
记住： setUserVisibleHint（）早于设置 onCreateView（）
好运气
推荐答案
对于每个ImageView的你将不得不调用循环（）方法。因此，前行：
For each imageView you will have to call recycle() method. So, before the line:
bild.setImageBitmap（德codeImage.de code（bild.getContext（）getResources（），R.drawable.swipe_bild））;
bild.setImageBitmap(DecodeImage.decode(bild.getContext().getResources(), R.drawable.swipe_bild));
您必须把行：
（（BitmapDrawable）bild.getDrawable（））getBitmap（）回收（）;
((BitmapDrawable) bild.getDrawable()).getBitmap().recycle();
如果问题仍然存在，这是因为图像过大，那么你将不得不对COM preSS它
If the problem persists, it's because the image is too large and then you will have to compress it
这篇关于Android的viewpager出内存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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