Question

我有一个选项卡式活动，该活动使用SectionsPagerAdapter来管理片段。如何发送字符串到片段？

我有一个使用SectionsPagerAdapter的选项卡式活动。 MainActivity控制用于从Bluetooth接收数据的handle方法。我需要将这些数据传递给我正在使用的3个片段。我已经尝试过bundle参数，但是Fragment中什么也没发生。

这是我的MainActivity onCreate

{
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(this, getSupportFragmentManager());
        final ViewPager viewPager = findViewById(R.id.view_pager);
        viewPager.setAdapter(sectionsPagerAdapter);
        TabLayout tabs = findViewById(R.id.tabs);
        tabs.setupWithViewPager(viewPager);

        //CONEXION BT

        Intent intent = getIntent();
        MACdireccion = intent.getStringExtra("EXTRA_ADDRESS");
        new ConnectBT().execute();

        btIn = new Handler(){
            public void handleMessage(Message msg){
                if(msg.what == handlerState){
                    String readMsg = (String) msg.obj;
                    recDataString.append(readMsg);
                    int endOfLineIndex = recDataString.indexOf("#");
                    if(endOfLineIndex > 0){
                        String dataIn = recDataString.substring(0,endOfLineIndex);
                        Date date = new Date();
                        DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");

                        hum = dataIn.substring(dataIn.indexOf("&")+1,dataIn.indexOf("H"));
                        temp = dataIn.substring(dataIn.indexOf("H")+1,dataIn.indexOf("C"));
                        DA = dataIn.substring(dataIn.indexOf("C")+1,dataIn.indexOf("A"));
                        DB = dataIn.substring(dataIn.indexOf("A")+1,dataIn.indexOf("B"));

                        DateTime = dateFormat.format(date);
                    }
                }

                sectionsPagerAdapter.Data(DA, DB, hum, temp, DateTime);
                //viewPager.getAdapter().notifyDataSetChanged();
            }

        };

这是我的SectionPagerAdapter

public Fragment getItem(int position) {
        Fragment fragment = null;
        switch (position){
            case 0:
                fragment = new Frag_GENERAL().newInstance(DA, DB, String.valueOf(DP), hum, temp);
                fragment.setArguments(bundleDA); fragment.setArguments(bundleDB);
                fragment.setArguments(bundleDP); fragment.setArguments(bundleHUM);
                fragment.setArguments(bundleTEMP);
                ((Frag_GENERAL) fragment).upDate();
                return fragment;
                //((Frag_GENERAL) fragment).DatosSonda();
            case 1:
                fragment = new Frag_GRAFICA();
                return fragment;
            case 2:
                fragment = new Frag_TXT();
                return fragment;
        }
        return null;
    }

    @Override
    public int getItemPosition(@NonNull Object object) {
        return POSITION_NONE;
    }

    public void Data(String A, String B, String H, String T, String dt){
        DA = A; DB = B; hum = H;
        temp = T; DateTime = dt;

        DP = 0.000000152;
        //DP = (Double.valueOf(DA)+Double.valueOf(DB))/2.00;
        escala = "mSv/h";

        if(DP < 1){
            DP = DP / 1000;
            escala = "uSv/h";
            if(DP < 1){
                DP = DP / 1000;
                escala = "nSv/h";
            }
        }

        bundleDA.putString("ARG_DA", "hola");
        bundleDB.putString("ARG_DB", "hola");
        bundleDP.putString("ARG_DP", "hola".toString());
        bundleHUM.putString("ARG_HUM", "hola");
        bundleTEMP.putString("ARG_TEMP", "hola");
    }

这是我的片段

public static Frag_GENERAL newInstance(String DosisA, String DosisB, String DosisP, String humedad, String temperatura) {
        Frag_GENERAL fragment = new Frag_GENERAL();
        Bundle args = new Bundle();

        args.putString(ARG_DA, DosisA);
        args.putString(ARG_DB, DosisB);
        args.putString(ARG_DP, DosisP);
        args.putString(ARG_HUM, humedad);
        args.putString(ARG_TEMP, temperatura);

        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            DA = getArguments().getString(ARG_DA);
            DB = getArguments().getString(ARG_DB);
            DP = getArguments().getString(ARG_DP);
            HUM = getArguments().getString(ARG_HUM);
            TEMP = getArguments().getString(ARG_TEMP);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        ViewGroup root = (ViewGroup) inflater.inflate(R.layout.frag_general, container, false);

        textDA = (TextView) root.findViewById(R.id.tv_DA);
        textDB = (TextView) root.findViewById(R.id.tv_DB);
        textDP = (TextView) root.findViewById(R.id.tv_DP);
        textHUM = (TextView) root.findViewById(R.id.tv_hum);
        textTEMP = (TextView) root.findViewById(R.id.tv_temp);
        textLATLONG = (TextView) root.findViewById(R.id.tv_latLONG);

        textDA.setText(DA);
        textDB.setText(DB);
        textDP.setText(DP);
        textHUM.setText(HUM);
        textTEMP.setText(TEMP);
        textLATLONG.setText("Lat: " + 14.00 + "Long: " + 15.00);
return root}

如何通过SectionPagerAdapter

0 个答案: