在Viewpager中实现Google地图，错误：无法获取提供程序com.google.firebase.provider.FirebaseInitProvider。
在Viewpager中实现Google地图，错误：无法获取提供程序com.google.firebase.provider.FirebaseInitProvider。
我在ViewPager中的Android Google地图集成中遇到了异常，请帮助我解决这个问题。我使用了以下代码，请纠正我的错误。这是我诚挚的请求。如果我的问题不合格，请添加评论，我会删除我的帖子。谢谢
活动名称：
MapTradeActivity.class
package com.tradezap.toolbartest;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import java.util.ArrayList;
import java.util.List;
public class MapTradeActivity extends AppCompatActivity {
private TabLayout tabLayout;
private ViewPager parent_viewpager;
ViewPagerAdapter pageAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maptrade);
parent_viewpager = (ViewPager) findViewById(R.id.parent_viewpager);
setupViewPager(parent_viewpager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(parent_viewpager);
parent_viewpager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
setupTabIcons();
}
private void setupTabIcons() {
int[] tabIcons = {
R.drawable.ic_settings,R.drawable.ic_category_24dp,R.drawable.ic_deal1
};
tabLayout.getTabAt(0).setIcon(tabIcons[0]);
tabLayout.getTabAt(1).setIcon(tabIcons[1]);
tabLayout.getTabAt(2).setIcon(tabIcons[2]);
}
private void setupViewPager(ViewPager viewPager) {
pageAdapter = new ViewPagerAdapter(getSupportFragmentManager());
pageAdapter.addFrag(new fragment_settings());
pageAdapter.addFrag(new fragment_category());
pageAdapter.addFrag(new fragment_deal());
parent_viewpager.setAdapter(pageAdapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List mFragmentList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
System.out.println(""+mFragmentList.size());
return mFragmentList.size();
}
public void addFrag(Fragment fragment) {
mFragmentList.add(fragment);
}
@Override
public CharSequence getPageTitle(int position) {
return null;
}
}
private TabLayout.OnTabSelectedListener onTabSelectedListener(final ViewPager mPager) {
return new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
mPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
};
}
}
片段名称：fragment_deal
package com.tradezap.toolbartest;
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import java.lang.reflect.Field;
/**
* Created by apple1 on 13/06/16.,OnMapReadyCallback
*/
public class fragment_deal extends Fragment implements View.OnClickListener {
private View dealFragView;
private SupportMapFragment mSupportMapFragment;
private GoogleMap mMap;
private static final LatLng marker_latlng = new LatLng(11.01, 76.95);
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
dealFragView = inflater.inflate(R.layout.fragment_deal_layout, container, false);
return dealFragView;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
FragmentManager fm = getChildFragmentManager();
mSupportMapFragment = (SupportMapFragment) fm.findFragmentById(R.id.map_container);
if (mSupportMapFragment == null) {
mSupportMapFragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map_container, mSupportMapFragment).commit();
}
}
@Override
public void onResume() {
super.onResume();
if (mMap == null) {
mMap = mSupportMapFragment.getMap();
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)));
}
}
@Override
public void onClick(View v) {
}
@Override
public void onDetach() {
super.onDetach();
try {
Field childFragmentManager = Fragment.class
.getDeclaredField("mChildFragmentManager");
childFragmentManager.setAccessible(true);
childFragmentManager.set(this, null);
} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
}
AndroidManifest.xml
遇到的异常日志
06-13 17:37:34.977 16326-16326/com.tradezap.googlemaptest E/AndroidRuntime: FATAL EXCEPTION: main Process: com.tradezap.googlemaptest, PID: 16326 java.lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.tradezap.googlemaptest-1/base.apk"],nativeLibraryDirectories=[/data/app/com.tradezap.googlemaptest-1/lib/arm, /vendor/lib, /system/lib]]
at android.app.ActivityThread.installProvider(ActivityThread.java:5177)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4769)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4709)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1415)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.tradezap.googlemaptest-1/base.apk"],nativeLibraryDirectories=[/data/app/com.tradezap.googlemaptest-1/lib/arm, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at android.app.ActivityThread.installProvider(ActivityThread.java:5162)
at android.app.ActivityThread.installContentProviders(ActivityThread.java:4769)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4709)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1415)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
Suppressed: java.lang.ClassNotFoundException: com.google.firebase.provider.FirebaseInitProvider
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 12 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available
我遵循了这篇帖子：How to put Google Maps V2 on a Fragment Using ViewPager请帮忙，谢谢。
问题原因：使用了错误的方法onActivityCreated()导致该问题的出现。
解决方法：改用方法onViewCreated()来替代onActivityCreated()，并进行相应的代码调整。以下是修改后的代码：
public void onViewCreated(View view, Bundle savedInstanceState) {
insertNestedFragment();
}
// 动态嵌入子片段
private void insertNestedFragment() {
FragmentManager fm = getChildFragmentManager();
mSupportMapFragment = (SupportMapFragment) fm.findFragmentById(R.id.child_fragment_container);
if (mSupportMapFragment == null) {
mSupportMapFragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.child_fragment_container, mSupportMapFragment).commit();
}
}
通过以上修改，问题应该得以解决。