在Marshmallow操作系统中运行时出错

Question

Hello Guys我目前正在编写一个具有滑动视图的片段应用程序，但是当我尝试将其运行到Marshmallow版本的操作系统时，它会停止并给出错误。我认为背景有问题，因为当我将图像更改为在运行之前创建的图像但使用新的应用程序时出现错误。我尝试在Lollipop版本中运行应用程序并且没有错误，被困在这里我真的需要帮助，这里是我的代码

这是java文件

package com.example.manginasal.manginasal;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;

import com.example.manginasal.manginasal.*;

public class SulitMeals extends Fragment {


    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.activity_sulit_meals, container, false);

        Button smone = (Button) v.findViewById(R.id.smonesolo);
        smone.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v){
                switch(v.getId()){

                    case R.id.smonesolo:
                        Intent intent1 = new Intent(getActivity(), SM1.class);
                        startActivity(intent1);//Edited here
                        break;


                }
            }
        });
        return v;
    }

    }

这是xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#0d6636"
    android:orientation="vertical">

    <LinearLayout
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:layout_gravity="center"
        android:orientation="vertical">

    <LinearLayout
        android:layout_marginTop="20dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/smonesolo"
            android:layout_width="150dp"
            android:layout_height="150dp"
            android:onClick="buttonClick"
            android:background="@drawable/smonesolobutton"/>

        <Button
            android:id="@+id/smonedrink"
            android:layout_width="150dp"
            android:layout_height="150dp"
            android:background="@drawable/smonedrinkbutton"/>

    </LinearLayout>

        <LinearLayout
            android:layout_marginTop="20dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:orientation="horizontal">

            <Button
                android:id="@+id/smtwosolo"
                android:layout_width="150dp"
                android:layout_height="150dp"
                android:background="@drawable/smtwosolobutton"/>
            <Button
            android:id="@+id/smtwodrink"
            android:layout_width="150dp"
            android:layout_height="150dp"
             android:background="@drawable/smtwodrinkbutton"/>

        </LinearLayout>

    </LinearLayout>
</LinearLayout>

主片段在这里

package com.example.manginasal.manginasal;

import android.app.ActionBar;
import android.graphics.Color;
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.PagerTabStrip;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;


public class MainMenu extends FragmentActivity {

    ViewPager pager;
    PagerTabStrip tab_strp;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_menu);
        Category_Adapter mapager=new Category_Adapter(getSupportFragmentManager());
        pager=(ViewPager)findViewById(R.id.pager);

        pager.setAdapter(mapager);
        tab_strp=(PagerTabStrip)findViewById(R.id.tab_strip);
        tab_strp.setTextColor(Color.WHITE);
        tab_strp.setTabIndicatorColor(Color.WHITE);
    }



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.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 a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

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

        return super.onOptionsItemSelected(item);
    }
}

这是xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context="com.example.manginasal.manginasal.MainMenu" >

    <android.support.v4.view.ViewPager
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/pager"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

        <android.support.v4.view.PagerTabStrip
            android:layout_width="wrap_content"
            android:layout_height="150dp"
            android:textSize="20sp"
            android:background="@drawable/tabbackground"
            android:id="@+id/tab_strip"
            android:focusableInTouchMode="false">



        </android.support.v4.view.PagerTabStrip>


    </android.support.v4.view.ViewPager>



</LinearLayout>

这里是logcat

  08-20 01:21:42.042  14177-14177/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.manginasal.manginasal, PID: 14177
    java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
            at com.example.manginasal.manginasal.SulitMeals.onCreateView(SulitMeals.java:26)
            at android.support.v4.app.Fragment.performCreateView(Fragment.java:1962)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1016)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1197)
            at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
            at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1562)
            at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:535)
            at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
            at android.support.v4.view.ViewPager.populate(ViewPager.java:1106)
            at android.support.v4.view.ViewPager.populate(ViewPager.java:952)
            at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1474)
            at android.view.View.measure(View.java:17482)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
            at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1083)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:615)
            at android.view.View.measure(View.java:17482)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
            at android.view.View.measure(View.java:17482)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
            at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
            at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
            at android.view.View.measure(View.java:17482)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5464)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:430)
            at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2594)
            at android.view.View.measure(View.java:17482)
            at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2006)
            at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1171)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1377)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1059)
            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5804)
            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
            at android.view.Choreographer.doCallbacks(Choreographer.java:580)
            at android.view.Choreographer.doFrame(Choreographer.java:550)
            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
            at android.os.Handler.handleCallback(Handler.java:739)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5261)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:939)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:734)