在所有设备上使用片段和查看寻呼机的按钮效果不佳

Question

在我的应用程序中，我在一个活动中使用了2个片段，而且我有一个共同点 两个片段的按钮，我使用ViewPager和SectionsPagerAdapter。

此代码适用于我的LG g3 ，但在较旧的设备上，按钮侦听器在启动时处于非活动状态，而其上的文本是另一个片段。 并且在片段之间滑动一次后也能正常工作

onCreate功能代码：`

    sendButton = (Button) findViewById(R.id.send_button);


    // Create the adapter that will return a fragment for each of the three
    // primary sections of the activity.
    mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());


    // Set up the ViewPager with the sections adapter.
    mViewPager = (ViewPager) findViewById(R.id.container);
    mViewPager.setAdapter(mSectionsPagerAdapter);


    // listener on page selected - for each fragment
    mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener(){

        // This method will be invoked when a new page becomes selected.
        @Override
        public void onPageSelected(int position) {
           setSendButton(position);
        }

        // This method will be invoked when the current page is scrolled
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            // Code goes here
        }

        // Called when the scroll state changes:
        // SCROLL_STATE_IDLE, SCROLL_STATE_DRAGGING, SCROLL_STATE_SETTLING
        @Override
        public void onPageScrollStateChanged(int state) {
            // Code goes here
        }
    });


    mViewPager.setCurrentItem(0);
    setSendButton(0);


    sendButton.setOnClickListener(new View.OnClickListener()
    {

        @Override
        public void onClick(View v)
        {
            if(sendMod == 0) {
                setUnitConfigurationByte(getUnitConfigurationByte());
                //  setFlowSetPointByte(getFlowSetPointBytes())
                writeConfiguration();
            }
            else
            {
                flowSetPointFragment.sendPPvCommand();
            }


        }

    });
}

寻呼机类代码：

public class SectionsPagerAdapter extends FragmentPagerAdapter {
    public SectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }


    @Override
    public Fragment getItem(int position) {
        // getItem is called to instantiate the fragment for the given page.
        // Return a PlaceholderFragment (defined as a static inner class below).
        switch (position)
        {
            case 0: {
                unitConfigurationFragment = new UnitConfigurationFragment();
                setSendButton(0);
                return unitConfigurationFragment;
            }
            case 1: {
                flowSetPointFragment = new FlowSetPointFragment();
                setSendButton(1);
                return flowSetPointFragment;
            }
        }

        return null;
    }



    @Override
    public int getCount() {
        // Show 2 total pages.
        return 2;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        switch (position) {

            case 0:
                setSendButton(0);
                return "UNIT CONFIGURATION";


            case 1:
                setSendButton(1);
                return "PULSE PER VOLUME";
        }


        return null;
    }
}

和按钮的设置者

   public void setSendButton(int fragment) {
    if (fragment == 0) {
        sendButton.setText("send units");
        sendMod = 0;
    }
    if (fragment == 1) {
        sendButton.setText("send pulse per volume");
        sendMod = 1;
    }
}

编辑： OnClick监听器：

        sendButton.setOnClickListener(new View.OnClickListener()
    {

        @Override
        public void onClick(View v)
        {
            if(sendMod == 0) {
                setUnitConfigurationByte(getUnitConfigurationByte());
                //  setFlowSetPointByte(getFlowSetPointBytes())
                writeConfiguration();
            }
            else
            {
                flowSetPointFragment.sendPPvCommand();
            }


        }

    });

谢谢你们！