java在使用片段时无法启动activity ComponentInfo
我正在尝试做一个基本的导航抽屉活动来启动一个应用程序项目。抽屉和一切都很好，然后我尝试使用片段为抽屉中的选项添加功能。我要买一个java。lang.RuntimeException:无法启动活动组件信息错误
主要活动。java
package edu.fsu.cs.mobile.productselectiontoolv4;
import 安卓.support.annotation.NonNull;
import 安卓.support.design.widget.NavigationView;
import 安卓.support.v4.view.GravityCompat;
import 安卓.support.v4.widget.DrawerLayout;
import 安卓.support.v7.app.ActionBarDrawerToggle;
import 安卓.support.v7.app.AppCompatActivity;
import 安卓.os.Bundle;
import 安卓.view.MenuItem;
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mToggle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer);
NavigationView navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
mToggle = new ActionBarDrawerToggle(this,mDrawerLayout, R.string.open,R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
/*
* Avoid reloading fragment when device is rotated
*/
if(savedInstanceState == null)
{
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_home, new HomeFragment()).commit();
navigationView.setCheckedItem(R.id.fragment_home);
}
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
switch(menuItem.getItemId()) {
case R.id.home:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_home, new HomeFragment()).commit();
break;
case R.id.history:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_history, new HistoryFragment()).commit();
break;
case R.id.settings:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_settings, new SettingsFragment()).commit();
break;
case R.id.help:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_help, new HelpFragment()).commit();
break;
}
mDrawerLayout.closeDrawer(GravityCompat.START);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(mToggle.onOptionsItemSelected(item))
return true;
return super.onOptionsItemSelected(item);
}
}
主要活动。xml
<?xml version="1.0" encoding="utf-8"?>
<安卓.support.v4.widget.DrawerLayout
xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
xmlns:tools="http://schemas.安卓.com/tools"
xmlns:app="http://schemas.安卓.com/apk/res-auto"
安卓:layout_width="match_parent"
安卓:layout_height="match_parent"
安卓:id="@+id/drawer"
tools:context=".MainActivity">
<安卓.support.design.widget.NavigationView
app:headerLayout="@layout/header"
安卓:layout_width="wrap_content"
安卓:id="@+id/nav_view"
安卓:layout_height="match_parent"
安卓:background="@color/darkerGray"
app:itemTextColor="@color/white"
app:itemIconTint="@color/white"
app:menu="@menu/drawermenu"
安卓:layout_gravity="start">
</安卓.support.design.widget.NavigationView>
</安卓.support.v4.widget.DrawerLayout>
家庭片段。java
package edu.fsu.cs.mobile.productselectiontoolv4;
import 安卓.os.Bundle;
import 安卓.support.annotation.NonNull;
import 安卓.support.annotation.Nullable;
import 安卓.support.v4.app.Fragment;
import 安卓.view.LayoutInflater;
import 安卓.view.View;
import 安卓.view.ViewGroup;
public class HomeFragment extends Fragment {
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_home, container, false);
}
}
fragment\u回家。xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:安卓="http://schemas.安卓.com/apk/res/安卓" 安卓:layout_width="match_parent"
安卓:layout_height="match_parent"
安卓:id="@+id/fragment_home"
安卓:background="@color/colorPrimary">
<TextView
安卓:id="@+id/textView"
安卓:layout_width="wrap_content"
安卓:layout_height="wrap_content"
安卓:layout_alignParentTop="true"
安卓:layout_centerHorizontal="true"
安卓:layout_marginTop="225dp"
安卓:text="Home fragment"
安卓:textSize="30dp"/>
</RelativeLayout>
Logcat错误
2019-01-24 21:00:27.158 10247-10247/edu.fsu.cs.mobile.productselectiontoolv4 E/AndroidRuntime: FATAL EXCEPTION: main
Process: edu.fsu.cs.mobile.productselectiontoolv4, PID: 10247
java.lang.RuntimeException: Unable to start activity ComponentInfo{edu.fsu.cs.mobile.productselectiontoolv4/edu.fsu.cs.mobile.productselectiontoolv4.MainActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f08004d (edu.fsu.cs.mobile.productselectiontoolv4:id/fragment_home) for fragment HomeFragment{9bc7706 #0 id=0x7f08004d}
at 安卓.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
at 安卓.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at 安卓.app.ActivityThread.-wrap11(Unknown Source:0)
at 安卓.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at 安卓.os.Handler.dispatchMessage(Handler.java:106)
at 安卓.os.Looper.loop(Looper.java:164)
at 安卓.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.安卓.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.IllegalArgumentException: No view found for id 0x7f08004d (edu.fsu.cs.mobile.productselectiontoolv4:id/fragment_home) for fragment HomeFragment{9bc7706 #0 id=0x7f08004d}
at 安卓.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1454)
at 安卓.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
at 安卓.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
at 安卓.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:802)
at 安卓.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
at 安卓.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
at 安卓.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
at 安卓.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2273)
at 安卓.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3273)
at 安卓.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3229)
at 安卓.support.v4.app.FragmentController.dispatchActivityCreated(FragmentController.java:201)
at 安卓.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:620)
at 安卓.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:178)
共 (0) 个答案