导航抽屉：fragmentTransaction.commit() 使我的应用程序崩溃
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【中文标题】导航抽屉：fragmentTransaction.commit() 使我的应用程序崩溃【英文标题】：Navigation Drawer: fragmentTransaction.commit() is crashing my application 【发布时间】：2018-01-12 00:33:43 【问题描述】：我正在创建导航抽屉，在我开始添加片段之前它一直有效，它在fragmentTransaction.commit(); 之后崩溃。但我无法理解为什么会这样。谢谢！
这是我的代码：
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.util.Log;
public class MainActivity extends AppCompatActivity
Toolbar toolbar;
DrawerLayout drawerLayout;
ActionBarDrawerToggle actionBarDrawerToggle;
FragmentTransaction fragmentTransaction;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar= (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawerLayout= (DrawerLayout) findViewById(R.id.drawer_layout);
actionBarDrawerToggle=new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.drawer_open,R.string.drawer_close);
drawerLayout.setDrawerListener(actionBarDrawerToggle);
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.main_container, new HomeFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Home . . .");
这是日志：
FATAL EXCEPTION: main
Process: com.example.hakobm.navdrawer, PID: 351
java.lang.RuntimeException: Unable to start activity ComponentInfocom.example.hakobm.navdrawer/com.example.hakobm.navdrawer.MainActivity: java.lang.RuntimeException: com.example.hakobm.navdrawer.MainActivity@f0b255b must implement OnFragmentInteractionListener
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.RuntimeException: com.example.hakobm.navdrawer.MainActivity@f0b255b must implement OnFragmentInteractionListener
at com.example.hakobm.navdrawer.HomeFragment.onAttach(HomeFragment.java:75)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1231)
at android.support.v4.app.FragmentTransition.addToFirstInLastOut(FragmentTransition.java:1085)
at android.support.v4.app.FragmentTransition.calculateFragments(FragmentTransition.java:976)
at android.support.v4.app.FragmentTransition.startTransitions(FragmentTransition.java:95)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2146)
at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2103)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2013)
at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:607)
at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:178)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1237)
at android.app.Activity.performStart(Activity.java:6268)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
【问题讨论】：
在这里发布错误日志。 只要确保你在两个类中使用相同的导入 ***.com/questions/28822229/… 我找到了问题，我的片段 Activity 有问题，我只是创建了一个空的 Activity 并扩展了 Fragment，现在它可以工作了，感谢 ALL 【参考方案1】：使用以下代码调用您的片段...
FragmentTransaction fragmenttransaction = getSupportFragmentManager().beginTransaction();
HomeFragment regcomplainfragment = new HomeFragment();
fragmenttransaction.replace(R.id.main_container, regcomplainfragment).addToBackStack("tag");
fragmenttransaction.commit();
并删除下面的行；
getSupportActionBar().setTitle("Home . . .");
【讨论】：
再次迷恋，我已经添加了日志【参考方案2】：我觉得这对你有用
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawer = (RelativeLayout) findViewById(R.id.drawer);
mDrawerList = (ListView) findViewById(R.id.drawer_listview);
if (savedInstanceState == null)
FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.main_container,new HomeFragment());
tx.commit();
actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.drawer_open, R.string.drawer_close);
drawerLayout.setDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.syncState();
title = new String[] Here you use menu title
;
icon = new int[] here show menu icon;
mMenuAdapter = new HomeMenuListAdapter(context, title, icon);
mDrawerList.setAdapter(mMenuAdapter);
mMenuAdapter.notifyDataSetChanged();
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener()
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id)
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
switch (position)
case 0:
ft.commit();
mDrawerList.setItemChecked(position, true);
drawerLayout.closeDrawer(mDrawer);
);
【讨论】：
【参考方案3】：你的 MainActivity 应该实现接口 OnFragmentInteractionListener
【讨论】：
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