java - 如何在 RecyclerView.Adapter 中使用 onActivityResult

Question

我想在 RecyclerView.Adapter 中使用 onActivityResult。但是我不明白这个版本在我的情况下是如何发布的。我有一个动态的 RecyclerView.Adapter

RecyclerView.Adapter:

public class SettingsRecyclerAdapter extends RecyclerView.Adapter {

    private ArrayList<SettingsTypeModel> dataSet;
    Context mContext;
    int total_types;


    TextInputLayout textInputLayoutIncome;
    TextInputLayout textInputLayoutCosts;
    EditText editIncome;
    EditText editCosts;

    public MoneyTypeViewHolder(View itemView) {
        super(itemView);

        textInputLayoutIncome = (TextInputLayout) itemView.findViewById(R.id.textInputLayoutIncome);
        editIncome = (EditText) textInputLayoutIncome.findViewById(R.id.editIncome);

        textInputLayoutCosts = (TextInputLayout) itemView.findViewById(R.id.textInputLayoutCosts);
        editCosts = (EditText) textInputLayoutCosts.findViewById(R.id.editCosts);
        }
    }
    public static class SendToMailTypeViewHolder extends RecyclerView.ViewHolder {

        Switch switchSendMailReport;

        public SendToMailTypeViewHolder(View itemView) {
            super(itemView);
            switchSendMailReport = (Switch) itemView.findViewById(R.id.switchSendMailReport);
        }
    }

    public static class SendToDriveTypeViewHolder extends RecyclerView.ViewHolder {

        Switch switchDriveReport;

        public SendToDriveTypeViewHolder(View itemView) {
            super(itemView);

            switchDriveReport = (Switch) itemView.findViewById(R.id.switchDriveReport);
        }
    }

    public SettingsRecyclerAdapter(ArrayList<SettingsTypeModel> data, Context context) {
        this.dataSet = data;
        this.mContext = context;
        total_types = dataSet.size();
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view;
        switch (viewType) {
            case SettingsTypeModel.TYPE_SEND_TO_MAIL:
                view = LayoutInflater.from(parent.getContext()).inflate(R.layout.type_send_to_mail, parent, false);
                return new SendToMailTypeViewHolder(view);
            case SettingsTypeModel.TYPE_SEND_TO_DRIVE:
                view = LayoutInflater.from(parent.getContext()).inflate(R.layout.type_send_to_drive, parent, false);
                return new SendToDriveTypeViewHolder(view);
        }
        return null;
    }

    @Override
    public int getItemViewType(int position) {
        switch (dataSet.get(position).type) {
            case 4:
                return SettingsTypeModel.TYPE_SEND_TO_MAIL;
            case 5:
                return SettingsTypeModel.TYPE_SEND_TO_DRIVE;
            default:
                return -1;
        }
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int listPosition) {

        SettingsTypeModel object = dataSet.get(listPosition);
        if (object != null) {
            switch (object.type) {
                case SettingsTypeModel.TYPE_SEND_TO_MAIL:

                    ((SendToMailTypeViewHolder) holder).switchSendMailReport.setChecked(false);
                    ((SendToMailTypeViewHolder) holder).switchSendMailReport.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                        @Override
                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                            if (isChecked) {

                            } else {

                            }
                        }
                    });
                    //       switchSendMailReport.setChecked(getSwitchSendReportMail());

                    break;

                case SettingsTypeModel.TYPE_SEND_TO_DRIVE:

                    ((SendToDriveTypeViewHolder) holder).switchDriveReport.setChecked(false);
                    ((SendToDriveTypeViewHolder) holder).switchDriveReport.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                        @Override
                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                            if (isChecked) {
                                ((SendToDriveTypeViewHolder) holder).switchDriveReport.setChecked(false);

                            } else {

                            }
                        }
                    });

                    break;
                }
            }
        }

        @Override
        public int getItemCount() {
            return dataSet.size();
        }
     }

Activity :

public class SettingsActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_settings);

        ArrayList<SettingsTypeModel> list= new ArrayList<>();
        list.add(new SettingsTypeModel(SettingsTypeModel.TYPE_SEND_TO_MAIL));
        list.add(new SettingsTypeModel(SettingsTypeModel.TYPE_SEND_TO_DRIVE));

        SettingsRecyclerAdapter adapter = new SettingsRecyclerAdapter(list,this);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, OrientationHelper.VERTICAL, false);

        RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.recyclerVieww);
        mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL));
        mRecyclerView.setLayoutManager(linearLayoutManager);
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());
        mRecyclerView.setClickable(true);
        mRecyclerView.setAdapter(adapter);
    }

    public void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
    }

    @Override
    public void onBackPressed() {
        super.onBackPressed();
    }
}

点击 switchSendMailReport 或 switchDriveReport 后，我​​需要调用函数 onActivityResult。

如何在 RecyclerView.Adapter 中使用onActivityResult？

非常感谢!

Answer 1

在您的 SettingsRecyclerAdapter 中创建一个接口(interface):

  public interface OnAdapterResult {
            public void onAdapterResult(boolean isChecked);
        }

并将接口(interface)附加到它的构造函数中:

 public SettingsRecyclerAdapter (Context context){
            mContext = context;
            // .. Attach the interface
            try{
                onAdapterResult = (OnAdapterResult) context;
            }catch(ClassCastException ex){

                Log.e("MyAdapter","error"+ ex,);
            }
        }

然后初始化你的接口(interface)方法:

((SendToMailTypeViewHolder) holder).switchSendMailReport.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                        @Override
                        public void onCheckedChanged(CompoundButton buttonView, 
                         boolean isChecked) {
                            if (isChecked) {
                            onAdapterResult.onAdapterResult(isChecked); \\ here
                            } else {

                            }
                        }
                    });

然后实现你的SettingsActivity来自adepter.OnAdapterResult接口(interface):

public class SettingsActivity extends AppCompatActivity implements adepter.OnAdapterResult {
.
.
.


    @Override
        public void onAdapterResult(boolean isChecked) {
            // 
        }

}