我在片段代码中的应用程序恢复时发生崩溃。我自己从未见过这种崩溃,但我通过 TestFlight 收到了用户返回的崩溃报告。
我想我缺少一些东西,因为代码在大多数机器上运行良好。任何帮助将不胜感激。
这是调用堆栈。
java.lang.NullPointerException
android.support.v4.app.Fragment.setUserVisibleHint in Fragment.java on Line 819
android.support.v4.app.FragmentPagerAdapter.setPrimaryItem in FragmentPagerAdapter.java on Line 130
android.support.v4.view.ViewPager.populate in ViewPager.java on Line 1066
android.support.v4.view.ViewPager.populate in ViewPager.java on Line 914
android.support.v4.view.ViewPager.onMeasure in ViewPager.java on Line 1436
android.view.View.measure in View.java on Line 15323
android.view.ViewGroup.measureChildWithMargins in ViewGroup.java on Line 4924
android.widget.LinearLayout.measureChildBeforeLayout in LinearLayout.java on Line 1421
android.widget.LinearLayout.measureVertical in LinearLayout.java on Line 698
android.widget.LinearLayout.onMeasure in LinearLayout.java on Line 579
android.view.View.measure in View.java on Line 15323
android.view.ViewGroup.measureChildWithMargins in ViewGroup.java on Line 4924
android.widget.FrameLayout.onMeasure in FrameLayout.java on Line 315
android.view.View.measure in View.java on Line 15323
android.support.v4.widget.DrawerLayout.onMeasure in DrawerLayout.java on Line 639
android.view.View.measure in View.java on Line 15323
android.view.ViewGroup.measureChildWithMargins in ViewGroup.java on Line 4924
android.widget.FrameLayout.onMeasure in FrameLayout.java on Line 315
android.view.View.measure in View.java on Line 15323
android.view.ViewGroup.measureChildWithMargins in ViewGroup.java on Line 4924
android.widget.LinearLayout.measureChildBeforeLayout in LinearLayout.java on Line 1421
android.widget.LinearLayout.measureVertical in LinearLayout.java on Line 698
android.widget.LinearLayout.onMeasure in LinearLayout.java on Line 579
android.view.View.measure in View.java on Line 15323
android.view.ViewGroup.measureChildWithMargins in ViewGroup.java on Line 4924
android.widget.FrameLayout.onMeasure in FrameLayout.java on Line 315
com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure in PhoneWindow.java on Line 2155
android.view.View.measure in View.java on Line 15323
android.view.ViewRootImpl.performMeasure in ViewRootImpl.java on Line 1854
android.view.ViewRootImpl.measureHierarchy in ViewRootImpl.java on Line 1102
android.view.ViewRootImpl.performTraversals in ViewRootImpl.java on Line 1275
android.view.ViewRootImpl.doTraversal in ViewRootImpl.java on Line 1000
android.view.ViewRootImpl$TraversalRunnable.run in ViewRootImpl.java on Line 4218
android.view.Choreographer$CallbackRecord.run in Choreographer.java on Line 725
android.view.Choreographer.doCallbacks in Choreographer.java on Line 555
android.view.Choreographer.doFrame in Choreographer.java on Line 525
android.view.Choreographer$FrameDisplayEventReceiver.run in Choreographer.java on Line 711
android.os.Handler.handleCallback in Handler.java on Line 615
android.os.Handler.dispatchMessage in Handler.java on Line 92
android.os.Looper.loop in Looper.java on Line 137
android.app.ActivityThread.main in ActivityThread.java on Line 4744
java.lang.reflect.Method.invokeNative(Native Method)
java.lang.reflect.Method.invoke in Method.java on Line 511
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run in ZygoteInit.java on Line 786
com.android.internal.os.ZygoteInit.main in ZygoteInit.java on Line 553
dalvik.system.NativeStart.main(Native Method)
首先,我在活动的 OnResume 函数中设置视图寻呼机。
private void initialiseViewPager()
{
mLoginFragment = new WeakReference<LoginFragment>(new LoginFragment());
Bundle loginBundle = new Bundle();
loginBundle.putInt("SpinnerIndex", HDMSLiveSession.getInstance().getSpinnerPosition());
loginBundle.putString("UserName", HDMSLiveSession.getInstance().getUsername());
loginBundle.putString("Password", HDMSLiveSession.getInstance().getPassword());
loginBundle.putInt("Mode", HDMSLiveSession.getInstance().getConnectionMode().ordinal());
loginBundle.putBoolean("LoggedIn", HDMSLiveSession.getInstance().isLoggedIn());
loginBundle.putBoolean("Connected", HDMSLiveSession.getInstance().isConnected());
loginBundle.putString("LoginResult", HDMSLiveSession.getInstance().getLoginResult());
loginBundle.putString("System", HDMSLiveSession.getInstance().getSystem());
loginBundle.putInt("code", HDMSLiveSession.getInstance().getAccessCode());
loginBundle.putLong("bytesSent", mCurrentSB);
loginBundle.putLong("bytesReceived", mCurrentRB);
loginBundle.putLong("nbytesSent", mNCurrentSB);
loginBundle.putLong("nbytesReceived", mNCurrentRB);
loginBundle.putInt("appid", mApp.getApplicationInfo().uid);
loginBundle.putString(mWebSocketAddressPreference, mConnect.getWebSocketURL());
loginBundle.putString(mAPIAddressPreference, mLogin.getLiveServerURL());
loginBundle.putBoolean(mAutoLoginPreference, mAutoLoginEnabled);
loginBundle.putBoolean(mAutoConnectPreference, mLogin.isAutoConnectEnabled());
loginBundle.putInt(mAutoReconnectTimePreference, mConnect.getAutoReconnectTime());
loginBundle.putInt(mMaxAutoReconnectionAttemptsPreference, mConnect.getMaxAutoReconnectionAttempts());
loginBundle.putInt(mPingResponseTimePreference, mConnect.getPingResponseTime());
loginBundle.putInt(mAutoPingTimePreference, mConnect.getAutoPingTime());
loginBundle.putInt(mCurrentPingPreference, mConnect.getCurrentPing());
loginBundle.putInt(mAutoReconnectAttemptsPreference, mConnect.getAutoReconnectAttempts());
loginBundle.putInt(mAutoReconnectTotalAttemptsPreference, mConnect.getAutoReconnectTotalAttempts());
loginBundle.putBoolean(mPlayListMessagePreference, messageSubscriptionContains(mPlayListMessage));
loginBundle.putBoolean(mAutoPageSwapPreference, mAutoPageSwap);
loginBundle.putBoolean(mWifiCheckedPreference, mWifiChecked);
loginBundle.putBoolean(mAutoWebCheckedPreference, mConnect.isAutoWebChecked());
loginBundle.putBoolean(mGatewayCheckedPreference, mGatewayChecked);
loginBundle.putBoolean(mDHS1CheckedPreference, mDNS1Checked);
loginBundle.putBoolean(mHDMSLiveCheckedPreference, mHDMSLiveChecked);
loginBundle.putBoolean(mGoogleCheckedPreference, mGoogleChecked);
loginBundle.putBoolean(mHDMSCheckedPreference, mHDMSChecked);
loginBundle.putBoolean(mParrotCheckedPreference, mParrotChecked);
loginBundle.putBoolean(mLocalIPCheckedPreference, mLocalIPChecked);
loginBundle.putString(mLocalIPPreference, mLocalIP);
loginBundle.putInt(mMaxImagesFromWebPreference, mMaxImagesFromWeb);
loginBundle.putInt(mMaxPingAttemptsPreference, mConnect.getMaxPingAttempts());
loginBundle.putInt(mFailedPingsPreference, mConnect.getFailedPings());
loginBundle.putBoolean("AutoLogin", mLogin.isAutoLogin());
loginBundle.putBoolean("wasLoggedIn", HDMSLiveSession.getInstance().wasLoggedIn());
mLoginFragment.get().setArguments(loginBundle);
mBAUFragment = new WeakReference<BAUFragment>(new BAUFragment());
Bundle bauBundle = new Bundle();
bauBundle.putBoolean("jump", mJumpToCurrent);
bauBundle.putInt("place", mBAUPosition);
bauBundle.putBoolean(mBAUExpandedPreference, mBAUExpanded);
mBAUFragment.get().setArguments(bauBundle);
mPlayerFragment = new WeakReference<PlayerFragment>(new PlayerFragment());
mListFragment = new WeakReference<ListFragment>(new ListFragment());
Bundle listBundle = new Bundle();
listBundle.putInt(mListModePreference, mListMode);
mListFragment.get().setArguments(listBundle);
mSearchFragment = new WeakReference<SearchFragment>(new SearchFragment());
Bundle searchBundle = new Bundle();
searchBundle.putInt(mSearchModePreference, mSearchMode);
searchBundle.putString("searchQueryA", mSearchTextA);
searchBundle.putString("searchQueryS", mSearchTextS);
searchBundle.putString("titleLast", mTitleLast);
searchBundle.putString("artistLast", mArtistLast);
searchBundle.putString("listLast", mListLast);
searchBundle.putString("yearLast", mYearLast);
searchBundle.putString("genreLast", mGenreLast);
mSearchFragment.get().setArguments(searchBundle);
mVideoFragment = new WeakReference<VideoFragment>(new VideoFragment());
Bundle videoBundle = new Bundle();
videoBundle.putInt(mVideoOutputPreference, mVideoOutput);
mVideoFragment.get().setArguments(videoBundle);
List<Fragment> fragments = new Vector<Fragment>();
fragments.add(mVideoFragment.get());
fragments.add(mPlayerFragment.get());
fragments.add(mBAUFragment.get());
fragments.add(mListFragment.get());
fragments.add(mSearchFragment.get());
fragments.add(mLoginFragment.get());
mPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager(), fragments);
mViewPager = (ViewPager)findViewById(R.id.contentViewPager);
mViewPager.setAdapter(mPagerAdapter);
mViewPager.setOnPageChangeListener(this);
mViewPager.setVisibility(View.VISIBLE);
ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
if (am.getMemoryClass() >= 32)
mViewPager.setOffscreenPageLimit(Fragments.Max.ordinal());
mLastFragment = -1;
UpdateDisplay();
}
除非是内存堆较小的设备,否则所有片段都会保留。目前有 6 个碎片,当内存中只有 4 个碎片时就会发生崩溃。所以我知道碎片的数量不是问题。我确实尝试将“查看寻呼机”设置保留为默认设置,唯一的区别是速度,因为应用程序需要在用户滑动时加载片段。当应用程序暂停时,所有片段都会被销毁。
@Override
protected void onSaveInstanceState(Bundle outState)
{
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
if (mLoginFragment.get() != null)
ft.remove(mLoginFragment.get());
if (mPlayerFragment.get() != null)
ft.remove(mPlayerFragment.get());
if (mBAUFragment.get() != null)
ft.remove(mBAUFragment.get());
if (mListFragment.get() != null)
ft.remove(mListFragment.get());
if (mSearchFragment.get() != null)
ft.remove(mSearchFragment.get());
if (mVideoFragment.get() != null)
ft.remove(mVideoFragment.get());
ft.commit();
mLoginFragment = new WeakReference<LoginFragment>(null);
mPlayerFragment = new WeakReference<PlayerFragment>(null);
mBAUFragment = new WeakReference<BAUFragment>(null);
mListFragment = new WeakReference<ListFragment>(null);
mSearchFragment = new WeakReference<SearchFragment>(null);
mVideoFragment = new WeakReference<VideoFragment>(null);
mPagerAdapter = null;
mViewPager = null;
mFragmentsLoaded = 0;
mLastFragment = -1;
}
这是我的查看寻呼机代码。
package com.hdms.manager.Fragments;
/**
* Created by bradj on 8/10/13.
*
*/
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import java.util.List;
public class ViewPagerAdapter extends FragmentPagerAdapter
{
private final List<Fragment> mFragments;
FragmentManager mFragmentManager;
public ViewPagerAdapter(FragmentManager aFragmentManager, List<Fragment> aFragments)
{
super(aFragmentManager);
mFragmentManager = aFragmentManager;
mFragments = aFragments;
}
@Override
public Fragment getItem(int aPosition)
{
return mFragments.get(aPosition);
}
@Override
public long getItemId(int aPosition)
{
return aPosition;
}
@Override
public void destroyItem(android.view.ViewGroup aContainer, int aPosition, java.lang.Object aObject)
{
if (aPosition <= getCount() && aObject != null)
{
FragmentTransaction trans = mFragmentManager.beginTransaction();
trans.remove((Fragment) aObject);
trans.commit();
}
}
@Override
public int getCount()
{
return mFragments.size();
}
}