java - InflateException 和 IllegalStateException，同时将 fragment 用于自定义列表

Question

我正在开发一个 Android 应用程序，它使用 Fragment 和 listView 在 HomeActivity 上生成两个列表，它还针对使用 NavigationViewer 进行菜单自定义。

主要 Activity :

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener  {


    PackageManager packageManager;
    ListView apkList,l;
    ImageView i;
    int c=0,sys=1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
                Intent i1 = new Intent(MainActivity.this, SecondActivity.class);
                startActivity(i1);
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);

FragmentManager fm=getFragmentManager();
        FragmentTransaction ft=fm.beginTransaction();
        Fragment1 f1=new Fragment1();
        Fragment2 f2=new Fragment2();
        ft.replace(R.id.fragment_2,f2);
        ft.replace(R.id.fragment_1,f1);
        ft.commit();


    }
    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify img parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.themes) {
            Intent i1=new Intent(MainActivity.this,SettingsActivity.class);
            startActivity(i1);

        } else if (id == R.id.settings) {
            Intent i1=new Intent(MainActivity.this,SettingsActivity.class);
            startActivity(i1);
        } else if (id == R.id.share) {

        } else if (id == R.id.send) {

        } else if (id == R.id.rating) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

fragment 1:

public class Fragment1 extends ListFragment {
 PackageManager pm;
    ListView apList;
    int c = 1;

    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";


    private String mParam1;
    private String mParam2;

    private OnFragmentInteractionListener mListener;

    public Fragment1() {

    }


    public static Fragment1 newInstance(String param1, String param2) {
        Fragment1 fragment = new Fragment1();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }

        apList=(ListView) getActivity().findViewById(R.id.listView);
        pm = getActivity().getPackageManager();
        List<PackageInfo> packageList = pm
                .getInstalledPackages(PackageManager.GET_PERMISSIONS);

        List<PackageInfo> packageList1 = new ArrayList<PackageInfo>();

        for (PackageInfo pi : packageList) {
            boolean b = isSystemPackage(pi);
            if (!b) {
                packageList1.add(pi);
            }

        }

        apList.setAdapter(new ApkAdapter(this, packageList1, pm, c));

    }
    private boolean isSystemPackage(PackageInfo pkgInfo) {
        if((pkgInfo.applicationInfo.flags & (ApplicationInfo.FLAG_SYSTEM|ApplicationInfo.FLAG_UPDATED_SYSTEM_APP)) >0)
        {
            return true;
        }
        else{
            return true;
        }
 }
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_1, container, false);
    }

    public void onButtonPressed(Uri uri) {
        if (mListener != null) {
            mListener.onFragmentInteraction(uri);
        }
    }
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof OnFragmentInteractionListener) {
            mListener = (OnFragmentInteractionListener) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }


    public interface OnFragmentInteractionListener {

        void onFragmentInteraction(Uri uri);
    }
}

fragment 2:

public class Fragment2 extends ListFragment {
    int c=0;
    String str[]= {"Wifi","Bluetooth"};

    public View onCreateView(LayoutInflater inflater, ViewGroup vg, Bundle s) {
        View view = inflater.inflate(R.layout.fragment_2, vg, false);

    List<String> l = new ArrayList<>();
    l.add("Wifi");
    l.add("Bluetooth");
    ApkAdapter ad = new ApkAdapter(this,l ,c);
    setListAdapter(ad);
    return view;
    }

    public void onCreate(Bundle s) {
        ListView l1;
        l1=(ListView)getActivity().findViewById(R.id.listView1);
        List<String> l=new ArrayList<>();
        l.add("Wifi");
        l.add("Bluetooth");
        ApkAdapter ad=new ApkAdapter(this,l,c);
        l1.setAdapter(ad);

    }
}

应用程序适配器:

public class ApkAdapter extends BaseAdapter {

    List<PackageInfo> packageList;
    List<String> s1;
    Fragment1 context;
    Fragment2 context1;
    PackageManager packageManager;
    Switch s;

    int c;
    String appName;
    String str[];
    int img[]={R.drawable.wifi,R.drawable.bluetooth};
    public ApkAdapter(Fragment1 context, List<PackageInfo> packageList,
                      PackageManager packageManager, int c) {
        super();
        this.context = context;
        this.packageList = packageList;
        this.packageManager = packageManager;
        this.c=c;
    }
    public ApkAdapter(Fragment2 context,List<String> s,int c)
    {
        super();
        this.context1=context;
        this.s1=s;
        this.c=c;
    }
    private class ViewHolder {
        TextView apkName;
        ImageView i;

    }

    public int getCount() {
        if (c == 1) {
            return packageList.size();
        }
        else if(c==0)
        {
            return str.length;
        }
        else return 0;
    }

    public Object getItem(int position) {
        if(c==1){
            return packageList.get(position);
        }
        else
            return position;
    }


    public long getItemId(int position) {
        return 0;
    }

    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder holder,h1;
        LayoutInflater inflater = context.getActivity().getLayoutInflater();
        LayoutInflater inflater1 = context1.getActivity().getLayoutInflater();
        ArrayList<String> ar = new ArrayList<String>();

        if (convertView == null) {
            if(c==0) {
                convertView = inflater.inflate(R.layout.apklist_item, null);
            }
            else if(c==1)
            {
                convertView = inflater1.inflate(R.layout.apklist_item, null);
            }
            holder = new ViewHolder();

            holder.apkName = (TextView) convertView.findViewById(R.id.appname);
            holder.i=(ImageView)convertView.findViewById(R.id.imageView);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
try{
        if(c==0) {
            int j = 0;
            while (j < 2) {
                int ser=(Integer) getItem(position);
                appName=s1.get(ser);
                Drawable dr = context.getResources().getDrawable(img[j]);
                dr.setBounds(0,0,10,10);
                resize(dr);
                holder.apkName.setCompoundDrawablesWithIntrinsicBounds(img[j], 0, 0, 0);
                holder.apkName.setCompoundDrawablePadding(3);
                holder.apkName.setText("\n" + "  " + appName);
                j++;
            }
        }
        else if(c==1) {
            PackageInfo packageInfo = (PackageInfo) getItem(position);
            Drawable appIcon = packageManager
                    .getApplicationIcon(packageInfo.applicationInfo);
            appName = packageManager.getApplicationLabel(
                    packageInfo.applicationInfo).toString();
            appIcon.setBounds(0, 0, 100, 100);
            holder.apkName.setCompoundDrawables(appIcon, null, null, null);
            holder.apkName.setCompoundDrawablePadding(25);
            holder.apkName.setText("\n" + "  " + appName);
        }
    holder.i.setScaleY(0.5f);
         holder.i.setImageResource(R.drawable.images);
     }
     catch(Exception e) {
         e.printStackTrace();
     }
        return convertView;
    }
    public Drawable resize(Drawable i)
    {
        Bitmap b=((BitmapDrawable)i).getBitmap();
        Bitmap br=Bitmap.createScaledBitmap(b,10,10,false);
        return new BitmapDrawable(Resources.getSystem(),br);
    }
}

还有一个 AppData 类，它有 getPackageInfo() 和 setPackageInfo() 方法。

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">

    <include
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

</android.support.v4.widget.DrawerLayout>

content_main.xml :

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:weightSum="1">

    <fragment
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:id="@+id/fragment_2"
        android:name="com.example.sardwal.applock.Fragment2"
        tools:layout="@layout/fragment_2" />
    <fragment
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:id="@+id/fragment_1"
        android:name="com.example.sardwal.applock.Fragment1"
        tools:layout="@layout/fragment_1"
        android:layout_marginTop="30dp" />
</LinearLayout>

fragment_1.xml 和 fragment_2.xml 有 listView 和 TextView，前者使用 frameLayout，后者使用 linear。两者都有一个 id 标签设置为 android:idlist

apklist_item.xml : 它有一个 textview 和 ImageView。由于字数限制无法放置他们的代码。我想这不会有任何区别。

我在 logcat 中收到以下异常，但不知道如何解决它们:

FATAL EXCEPTION: main
                                                   Process: com.example.sardwal.applock, PID: 21919
                                                   java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.sardwal.applock/com.example.sardwal.applock.MainActivity}: android.view.InflateException: Binary XML file line #11: Binary XML file line #9: Error inflating class fragment
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2584)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2666)
                                                       at android.app.ActivityThread.-wrap11(ActivityThread.java)
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1493)
                                                       at android.os.Handler.dispatchMessage(Handler.java:111)
                                                       at android.os.Looper.loop(Looper.java:207)
                                                       at android.app.ActivityThread.main(ActivityThread.java:5769)
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
                                                    Caused by: android.view.InflateException: Binary XML file line #11: Binary XML file line #9: Error inflating class fragment
                                                       at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
                                                       at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
                                                       at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
                                                       at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267)
                                                       at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129)
                                                       at com.example.sardwal.applock.MainActivity.onCreate(MainActivity.java:44)
                                                       at android.app.Activity.performCreate(Activity.java:6583)
                                                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1114)
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2531)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2666) 
                                                       at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1493) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:111) 
                                                       at android.os.Looper.loop(Looper.java:207) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:5769) 
                                                       at java.lang.reflect.Method.invoke(Native Method) 
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679) 
                                                    Caused by: android.view.InflateException: Binary XML file line #9: Error inflating class fragment
                                                       at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:782)
                                                       at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
                                                       at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
                                                       at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
                                                       at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
                                                       at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
                                                       at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
                                                       at android.view.LayoutInflater.parseInclude(LayoutInflater.java:971)
                                                       at android.view.LayoutInflater.rInflate(LayoutInflater.java:831)
                                                       at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
                                                       at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
                                                       at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
                                                       at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
                                                       at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:267) 
                                                       at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:129) 
                                                       at com.example.sardwal.applock.MainActivity.onCreate(MainActivity.java:44) 
                                                       at android.app.Activity.performCreate(Activity.java:6583) 
                                                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1114) 
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2531) 
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2666) 
                                                       at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1493) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:111) 
                                                       at android.os.Looper.loop(Looper.java:207) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:5769) 
                                                       at java.lang.reflect.Method.invoke(Native Method) 
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679) 

除此之外，最近当我在我的联想设备上运行相同的代码时，我在 logcat 错误上遇到以下错误:

 E/AppOnlineConfigurationUpdateTask: Get app configuration fail. Target host must not be null, or set in parameters. scheme=null, host=null, path=/reaper/server/appparams
                                                                   java.lang.IllegalStateException: Target host must not be null, or set in parameters. scheme=null, host=null, path=/reaper/server/appparams
                                                                       at org.apache.http.impl.client.DefaultRequestDirector.determineRoute(DefaultRequestDirector.java:603)
                                                                       at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:299)
                                                                       at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:601)
                                                                       at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:519)
                                                                       at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:497)
                                                                       at com.lenovo.lps.reaper.sdk.i.b.a(Unknown)
                                                                       at com.lenovo.lps.reaper.sdk.i.a.run(Unknown)
                                                                       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
                                                                       at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                                                                       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                                                       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                                                       at java.lang.Thread.run(Thread.java:818)

E/ConfigurationUpdateTask: Same stuff IllegalStateException 

 E/SurfaceFlinger: strok layer name=none

 E/EventReportHandler: Same stuff IllegalStateException

 E/SurfaceFlinger: strok layer name=none

 E/WifiTrafficPoller: TRAFFIC_STATS_POLL true Token 1540 num clients 10
 E/WifiTrafficPoller:  packet count Tx=1476881 Rx=1685658
 E/InputMethodManagerService: Ignoring updateSystemUiLocked due to an invalid token. uid:1000 token:null
 E/SwitchMobileDataTile: mobile data not ready or disabled
 E/InputDispatcher: channel 'f377d75  (server)' ~ Channel is unrecoverably broken and will be disposed!
 E/MountService: setDefaultPath new path=/storage/emulated/0

我陷入了这些错误，却不知道如何解决它们。谢谢

Answer 1

应用程序崩溃，因为您正在 Fragments 的 onCreate 方法中查找您的列表。你应该在 fragment 中使用这样的东西:

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { ListView l1;
    l1=(ListView)view.findViewById(R.id.listView1);
    List<String> l=new ArrayList<>();
    l.add("Wifi");
    l.add("Bluetooth");
    ApkAdapter ad=new ApkAdapter(this,l,c);
    l1.setAdapter(ad);}

这是在 Fragment 的 onCreateView 方法之后调用的，因此您的 Fragment 布局将被设置，您将不会寻找空的 ListView。