我正在使用materialviewpager库。我有几个片段，在它们里面是网格视图。当您选择其中一个时，在同一个活动中会有一个新片段替换之前的片段。我通过创建如下函数来完成这项工作。
public void initialViewPager(final String extra)
{
mViewPager.getViewPager().setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager(),extra));
......
}
并且在带有switch case的getItem方法中返回一个新片段。
运行几次后出现此错误：
Throwing OutOfMemoryError "Failed to allocate a 279372 byte allocation with 216600 free bytes and 211KB until OOM。
如何在不将片段存储在内存中的情况下编写适配器？或者如何解决这个问题？
MainActivity类如下：
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
ButterKnife.inject(this);
if (toolbar != null) {
setSupportActionBar(toolbar);
getSupportActionBar().setTitle(null);
}
View guillotineMenu = LayoutInflater.from(this).inflate(R.layout.guillotine, null);
root.addView(guillotineMenu);
new GuillotineAnimation.GuillotineBuilder(guillotineMenu, guillotineMenu.findViewById(R.id.guillotine_hamburger), contentHamburger)
.setStartDelay(RIPPLE_DURATION)
.setActionBarViewForAnimation(toolbar)
.build();
if (!BuildConfig.DEBUG)
Fabric.with(this, new Crashlytics());
mViewPager = (MaterialViewPager) findViewById(R.id.materialViewPager);
if(getIntent().getStringExtra("query")!=null) {
extra2= getIntent().getStringExtra("query");
if(getIntent().getStringExtra("query")!=null) {
tab_name = getIntent().getStringExtra("tabname");
}
}else{extra2="7";}
initialViewPager(extra2);
public void initialViewPager(final String extra)
{
mViewPager.getViewPager().setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager()) {
int currentPage = 0;
private SparseArray<Fragment> mPageReferenceMap = new SparseArray<Fragment>();
int pos;
@Override
public Fragment getItem(int position) {
switch (position % 3) {
case 0:
pos=0;
if( extra.equals("8")||extra.equals("9")){
RuleItem.back_frament="Rule";
RuleItem.level=1;
myFragment = RuleItem.newInstance("select * from rules" +
" where category='" + String.valueOf((int) (Math.floor(Integer.parseInt(extra)))) + "'",MainActivity.this);
mPageReferenceMap.put(0, myFragment);
mFragments.add(new WeakReference<Fragment>(myFragment));
return myFragment;
}
if(extra.equals("exam")){
myFragment = Exam.newInstance();
mPageReferenceMap.put(0, myFragment);
mFragments.add(new WeakReference<Fragment>(myFragment));
return myFragment;
}
if(extra.equals("Rule")){
myFragment =Rule.newInstance(MainActivity.this);
mPageReferenceMap.put(0, myFragment);
mFragments.add(new WeakReference<Fragment>(myFragment));
return myFragment;
}
if(extra.equals("0") ||extra.equals("1")||extra.equals("2")||extra.equals("3")
||extra.equals("4")||extra.equals("5")||extra.equals("6")||
extra.equals("10")|| extra.equals("7")||extra.equals("71") ||
extra.equals("72")|| extra.equals("05")||extra.equals("08")
|| extra.equals("36") || extra.equals("37")) {
///////for back bt
if(extra.equals("7")){
Slider.back_frament="Rule";
Slider.level=1;
myFragment =Slider.newInstance(extra, MainActivity.this);
mPageReferenceMap.put(0, myFragment);
mFragments.add(new WeakReference<Fragment>(myFragment));
return myFragment;
}
if(extra.equals("0") ||extra.equals("1")||extra.equals("2")||extra.equals("3")
||extra.equals("4")||extra.equals("5")||extra.equals("6")
||extra.equals("10")){
Slider.back_frament="Rule";
Slider.level=1;
myFragment =Slider.newInstance(extra, MainActivity.this);
mPageReferenceMap.put(0, myFragment);
mFragments.add(new WeakReference<Fragment>(myFragment));
return myFragment;
}
if(extra.equals("71") ||
extra.equals("72")|| extra.equals("05")||extra.equals("08")
|| extra.equals("36") || extra.equals("37")){
back_fragment="Rule";
level=1;
Slider.back_frament="7";
Slider.level=1;
myFragment =Slider.newInstance(extra, MainActivity.this);
mPageReferenceMap.put(0, myFragment);
mFragments.add(new WeakReference<Fragment>(myFragment));
return myFragment;
}
}
case 1:
pos=1;
if( extra.equals("8")||extra.equals("9")){
myFragment =QuestionPage.newInstance("select * from exam" +
" where " + exam.KEY_TYPE + "='" + extra + "'",MainActivity.this);
mPageReferenceMap.put(1, myFragment);
mFragments.add(new WeakReference<Fragment>(myFragment));
return myFragment;
}
if(extra.equals("7") ){
myFragment =RuleItem.newInstance("select * from rules" +
" where category='" + String.valueOf((int) (Math.floor(Integer.parseInt("7")))) + "'",MainActivity.this);
mPageReferenceMap.put(1, myFragment);
mFragments.add(new WeakReference<Fragment>(myFragment));
return myFragment;
}
case 2:
pos=2;
if(extra.equals("7") ) {
myFragment =QuestionPage.newInstance("select * from exam" +
" where " + exam.KEY_TYPE + "='" + "7" + "'",MainActivity.this);
mPageReferenceMap.put(1, myFragment);
mFragments.add(new WeakReference<Fragment>(myFragment));
return myFragment;
}
default:
return RecyclerViewFragment.newInstance();
}
}
@Override
public int getCount() {
return 3;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
super.destroyItem(container, position, object);
mPageReferenceMap.remove(Integer.valueOf(position));
}
public Fragment getCurrentItem() {
return mPageReferenceMap.get(currentPage);
}
});
mViewPager.getViewPager().setOffscreenPageLimit(mViewPager.getViewPager().getAdapter().getCount());
mViewPager.getPagerTitleStrip().setViewPager(mViewPager.getViewPager());
View logo = findViewById(R.id.logo_white);
if (logo != null)
logo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mViewPager.notifyHeaderChanged();
Toast.makeText(getApplicationContext(), "Yes, the title is clickable", Toast.LENGTH_SHORT).show();
}
});
mViewPager.notifyHeaderChanged();
}
}