如何将复选框状态从活动传递到片段

Question

我的应用程序背景：

这是一个健身监视应用程序。

我想做的：

如果用户单击复选框，则必须更新练习进度，例如

，我想更新足够的textview（在这种情况下为squats for squats）到当前级别。

我的应用程序当前要做的事情：

我有一个用于练习活动的回收天口适配器。我设法保存了复选框的检查状态并检索它。我猜TinyDB只是一个类似于共享流程的库。

课程开始：

public class ExercisesRecyclerView extends RecyclerView.Adapter<ExercisesRecyclerView.MyViewHolder>
{
    String[] data1, data2, videoURL;
    String exercise;
    int[] images;
    Context context;
    TinyDBManager tinyDB;

        public ExercisesRecyclerView(Context ct, String[] s1, String[] s2, String[] videoArray,
                                     String exerciseType) {
            context = ct;
            data1 = s1;
            data2 = s2;
            videoURL = videoArray;
            exercise = exerciseType;
            tinyDB = TinyDB.getInstance(context);
        }

保存复选框状态的代码：

 holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
                if(isChecked){

                    tinyDB.putBoolean("checkBox"+data2[position]+exercise, true);


                }else{
                    tinyDB.putBoolean("checkBox"+data2[position]+exercise, false);
                }
            }
        });

        TinyDBManager manager2 = TinyDB.getInstance(context);

        if(manager2.getBoolean("checkBox" + data2[position] + exercise, false)) {
            holder.checkBox.setChecked(true);
        }else{
            holder.checkBox.setChecked(false);
        }
        

练习活动：

public class exercises extends AppCompatActivity {

    String data1;
    RecyclerView recyclerView;
    String[] s1,s2,s3;
    int[] images = {R.drawable.squat,R.drawable.pull_up,R.drawable.handstand,R.drawable.leg_raises,
            R.drawable.push_up,R.drawable.dips,R.drawable.horizontal_pull,R.drawable.plank};
    ImageView goBackArrow;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_exercises);
        Objects.requireNonNull(getSupportActionBar()).hide();
        goBackArrow = findViewById(R.id.go_back_arrow2);
        data1 = getIntent().getStringExtra("data1");

        Log.d("IntentToExercises", "onCreate: " + data1);


        recyclerView = findViewById(R.id.exercisesRecyclerView);

        if(data1.equals("SQUATS")) {
            s1 = getResources().getStringArray(R.array.LEVEL);
            s2 = getResources().getStringArray(R.array.SQUATS);
            s3 = getResources().getStringArray(R.array.SQUATS_VIDEOURL);
            ExercisesRecyclerView exercisesRecyclerView = new ExercisesRecyclerView(this,
                    s1,s2,s3,"squat");
            recyclerView.setAdapter(exercisesRecyclerView);
            recyclerView.setLayoutManager(new LinearLayoutManager(this));
        } else if(data1.equals("PULL UPS")){
            s1 = getResources().getStringArray(R.array.LEVEL);
            s2 = getResources().getStringArray(R.array.PULL_UPS);
            s3 = getResources().getStringArray(R.array.PULL_UPS_VIDEOURL);
            ExercisesRecyclerView exercisesRecyclerView = new ExercisesRecyclerView(this,
                    s1,s2,s3,"pullup");
            recyclerView.setAdapter(exercisesRecyclerView);
            recyclerView.setLayoutManager(new LinearLayoutManager(this));
        }else if(data1.equals("HANDSTAND PUSH UPS")){
            s1 = getResources().getStringArray(R.array.LEVEL);
            s2 = getResources().getStringArray(R.array.HANDSTAND);
            s3 = getResources().getStringArray(R.array.HANDSTAND_VIDEOURL);
            ExercisesRecyclerView exercisesRecyclerView = new ExercisesRecyclerView(this,
                    s1,s2,s3,"handstand");
            recyclerView.setAdapter(exercisesRecyclerView);
            recyclerView.setLayoutManager(new LinearLayoutManager(this));
        }else if(data1.equals("LEG RAISES")){
            s1 = getResources().getStringArray(R.array.LEVEL);
            s2 = getResources().getStringArray(R.array.LEGRAISES);
            s3 = getResources().getStringArray(R.array.LEGRAISES_VIDEOURL);
            ExercisesRecyclerView exercisesRecyclerView = new ExercisesRecyclerView(this,
                    s1,s2,s3,"legraises");
            recyclerView.setAdapter(exercisesRecyclerView);
            recyclerView.setLayoutManager(new LinearLayoutManager(this));
        }else if(data1.equals("PUSH UPS")){
            s1 = getResources().getStringArray(R.array.LEVEL);
            s2 = getResources().getStringArray(R.array.PUSH_UPS);
            s3 = getResources().getStringArray(R.array.PUSH_UPS_VIDEOURL);
            ExercisesRecyclerView exercisesRecyclerView = new ExercisesRecyclerView(this,
                    s1,s2,s3,"pushups");
            recyclerView.setAdapter(exercisesRecyclerView);
            recyclerView.setLayoutManager(new LinearLayoutManager(this));
        }else if(data1.equals("DIPS")){
            s1 = getResources().getStringArray(R.array.LEVEL);
            s2 = getResources().getStringArray(R.array.DIPS);
            s3 = getResources().getStringArray(R.array.DIPS_VIDEOURL);
            ExercisesRecyclerView exercisesRecyclerView = new ExercisesRecyclerView(this,
                    s1,s2,s3,"dips");
            recyclerView.setAdapter(exercisesRecyclerView);
            recyclerView.setLayoutManager(new LinearLayoutManager(this));
        }else if(data1.equals("HORIZONTAL PULLS")){
            s1 = getResources().getStringArray(R.array.LEVEL);
            s2 = getResources().getStringArray(R.array.HORIZONTAL_PULLS);
            s3 = getResources().getStringArray(R.array.HORIZONTAL_PULLS_VIDEOURL);
            ExercisesRecyclerView exercisesRecyclerView = new ExercisesRecyclerView(this,
                    s1,s2,s3,"horizontalpulls");
            recyclerView.setAdapter(exercisesRecyclerView);
            recyclerView.setLayoutManager(new LinearLayoutManager(this));
        }

我的猜测是我必须为每个复选框分配索引，请添加所有数据到阵列或数组列表，然后将其传递到练习进度片段，然后循环通过此数组，以找到最高的索引，这将是用户当前所在的级别，但是我不知道我是否猜正确。如果我的猜测是正确的，那么我可以以某种方式处理，但是我需要一些指导。

Answer 1

首先，我会建议您的练习活动进行代码重构，因为您有很多dupicated代码，而且在较低情况下命名您的活动并不是一个好习惯。

最后，从片段中，您可以访问包含实例的活动。如果您将fragment your fragment.getactivity（）放在“练习”中，并在您的类中实现一种实现您所需逻辑的方法，那么您的问题将得到解决。

我希望我有帮助，请让我知道我是否可以帮助其他任何事情。 :)

重构：
如果您使用S1，S2和S3创建类，则在您的内部使用，如果您只需实例化该对象。这样，您的代码将非常简单。

YourObject object = null
if (firstCase) {object = YourObject(LEVEL, "pushups", "ksajdfh");}
else if (secondCase) {object = YourObject(LEVEL, "run", "ksajdfh");}
......
ExercisesRecyclerView exercisesRecyclerView = new ExercisesRecyclerView(this,
                object.s1,object.s2,object.s3,object.s4);
        recyclerView.setAdapter(exercisesRecyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));