我正在为大学制作Android应用程序。应用程序是关于健身（跟踪大卡，锻炼......）。我已经卡住了我要为我的适配器notifyDatasetChange的部分。在我的活动中我有2个列表视图（第一个是显示练习，第二个是显示今天锻炼的选定练习）。当用户为自己“创建”新类型的练习时，我轻松地更新了ListView，因为Arraylist并从当前活动调用，但是对于第二个ListView，我在其适配器类中创建了Dialog，我希望关闭该对话框以更新ListView。这是我的代码和类：
public class MyWorkoutActivity extends AppCompatActivity {
ListView lv;
ListView lvsess;
Button create;
@Override
public void onBackPressed(){
finish();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_workout);
create=(Button) findViewById(R.id.btn_addexercise);
WorkoutDay workoutDay = SugarRecord.findById(WorkoutDay.class, (long) 1);
List<WorkoutDay> workoutDayArrayList = new ArrayList<>();
if(workoutDay.getWorkouts()!="") {
String[] workouts = workoutDay.getWorkouts().split(":");
String[] sets = workoutDay.getSets().split(":");
String[] reps = workoutDay.getReps().split(":");
String[] kgs = workoutDay.getKgs().split(":");
String[] duration = workoutDay.getDuration().split(":");
for (int i = 0; i < workouts.length; i++) {
workoutDayArrayList.add(new WorkoutDay(workouts[i],sets[i],reps[i],kgs[i],duration[i]));
}
}
final ArrayList<WorkoutDay> ddd = new ArrayList<>();
ddd.addAll(workoutDayArrayList);
List<Exercise> exerciseList = Exercise.listAll(Exercise.class);
final ArrayList<Exercise> exerciseArrayList= new ArrayList<>();
exerciseArrayList.addAll(exerciseList);
lv=(ListView) findViewById(R.id.lv_exercises);
lvsess=(ListView)findViewById(R.id.lv_currentsess);
final SessionAdapter sessionAdapter = new SessionAdapter(this,ddd);
final ExerciseAdapter exerciseAdapter= new ExerciseAdapter (this,exerciseArrayList);
lv.setAdapter(exerciseAdapter);
lvsess.setAdapter(sessionAdapter);
create.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
List<String> cathegories = new ArrayList<String>();
cathegories.add("Chest");
cathegories.add("Biceps");
cathegories.add("Triceps");
cathegories.add("Legs");
cathegories.add("Core");
cathegories.add("Abdomens");
cathegories.add("Cardio");
cathegories.add("Free style");
final Dialog addyourown= new Dialog(MyWorkoutActivity.this);
addyourown.setTitle("Add your exercise");
addyourown.setContentView(R.layout.addyourownex);
Button btn = (Button)addyourown.findViewById(R.id.btn_dialog_add);
final EditText et = (EditText)addyourown.findViewById(R.id.et_dialog_insertname);
final Spinner spinner = (Spinner)addyourown.findViewById(R.id.sp_cath);
ArrayAdapter<String> adapter ;
adapter = new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_spinner_dropdown_item,cathegories);
spinner.setAdapter(adapter);
addyourown.show();
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(et.getText().toString().isEmpty()){
Toast.makeText(getApplicationContext(),"EMPTY INPUT",Toast.LENGTH_SHORT).show();
}else {
Exercise exercise = new Exercise(et.getText().toString(), spinner.getSelectedItem().toString());
exercise.save();
exerciseArrayList.add(exercise);
exerciseAdapter.notifyDataSetChanged();
addyourown.cancel();
}
}
});
}
});
}
和我的适配器类，带对话框
public class ExerciseAdapter extends ArrayAdapter<Exercise> {
public Dialog newDialog;
public ExerciseAdapter(@NonNull Context context, ArrayList<Exercise> exercises) {
super(context,0,exercises);
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
final Exercise exercise = getItem(position);
if(convertView==null){
convertView= LayoutInflater.from(getContext()).inflate(R.layout.exercises_layout,parent,false);
}
TextView name = (TextView)convertView.findViewById(R.id.tv_exercise);
ImageButton ib= (ImageButton)convertView.findViewById(R.id.ib_plus);
name.setText(exercise.getName());
ib.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
newDialog = new Dialog(v.getRootView().getContext());
if(exercise.getCathegory().equals("Cardio")) {
newDialog.setContentView(R.layout.cardio_layout);
final EditText duration = (EditText)newDialog.findViewById(R.id.et_duration);
Button bt = (Button) newDialog.findViewById(R.id.btn_carconfirm);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(duration.getText().toString().equals("")){
Toast.makeText(getContext(),"EMPTY INPUT",Toast.LENGTH_SHORT).show();
}else {
WorkoutDay workoutDay = SugarRecord.findById(WorkoutDay.class,(long)1);
workoutDay.extendCardio(exercise.getName(),duration.getText().toString());
workoutDay.save();
newDialog.cancel();
}
}
});
} else {
newDialog.setContentView(R.layout.instervalue_exercises);
final EditText sets = (EditText)newDialog.findViewById(R.id.et_series);
final EditText reps = (EditText)newDialog.findViewById(R.id.et_reps) ;
final EditText kgs = (EditText)newDialog.findViewById(R.id.et_kg);
Button bt = (Button) newDialog.findViewById(R.id.btn_confirm);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(sets.getText().toString().equals("") || reps.getText().toString().equals("") || kgs.getText().toString().equals("")){
Toast.makeText(getContext(),"EMPTY INPUT",Toast.LENGTH_SHORT).show();
}else {
WorkoutDay workoutDay = SugarRecord.findById(WorkoutDay.class,(long)1);
workoutDay.extendExercise(exercise.getName(),sets.getText().toString(),reps.getText().toString(),kgs.getText().toString());
workoutDay.save();
newDialog.cancel();
}
}
});
}
newDialog.show();
}
});
return convertView;}