如何在同一个 onTimeSet() 中提取两个时间选择器对话框的小时和分钟？

Question

我已经在一个片段中实现了按钮按下时的时间选择器（Work）但是我如何提取两个对话框的小时和分钟以仅使用一个 onTimeSet() 来分隔变量，它位于 MainActivity?

这是我的 onTimeSet() 在我的 MainActivity:

    public void onTimeSet(TimePicker timePicker, int i, int i1) {
        TextView textView = (TextView)findViewById(R.id.textstart);
        textView.setText("Hour: "+ i + " Minutes: "+ i1);

        getSupportFragmentManager().getFragments();

    }

这是我的 Work 片段：

Button timeButton = (Button) view.findViewById(R.id.timeButton);
        timeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                DialogFragment timePicker = new TimePicker_Fragment();
                timePicker.show(getFragmentManager(), "Time Picker");
            }
        });

        Button timeButton2 = (Button) view.findViewById(R.id.timeButton2);
        timeButton2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                DialogFragment timePicker2 = new TimePicker_Fragment();
                timePicker2.show(getFragmentManager(), "Time Picker 2");
            }
        });

        return view;
    }

Answer 1

我不确定我是否理解问题。

你试过类似的东西吗（不确定确切的语法）：

public void onTimeSet(TimePicker timePicker, int i, int i1) {
    TextView textView = (TextView)findViewById(R.id.textstart);
    textView.setText("Hour: "+ timePicker.getHour() + " Minutes: "+ timePicker.getMinute());
}

您还可以向 TimePicker_Fragment 构造函数添加一个侦听器，以便在更新时获取新的小时和分钟。

Answer 2

一种选择是更改应用程序的体系结构：

由于 TimePickerFragment 是唯一可以理解 onTimeSet() 中的 TimePicker 参数的参数，因此它是实现 TimePickerDialog.OnTimeSetListener 的合理选择。

TimePicker_Fragment 的两个实例可以通过一些自定义接口向主机 WorkFragment（最终 Activity）报告。使用一些唯一值（String 或枚举）在您的自定义版本 onTimeSet() 中识别它们。

例如，您的 Activity 可以实现如下方法：

@Override
void onCustomTimeSet(String timePickerId, int hour, int minutes){
    switch(timePickerId){
        case "TIME_PICKER":
            // code for time  picker 1 here
            break;
        case "TIME_PICKER_2":
            // code for time  picker 1 here
            break;
    }
    // ...
}

...将在 TimePicker_Fragment

中执行 "normal" onTimeSet(TimePicker, int, int) 时调用

@Override
void onTimeSet(TimePicker timePicker, int i, int i2){
    ((CustomTimePickerListener)getActivity()).onCustomTimeSet("TIME_PICKER_1", i, i2)
}

另一种选择是利用 TimePicker 是 View，并且 View 可以有一个标签（可以是任何类型的 Object，参见 View.setTag()）。

因此您可以让 TimePicker_Fragment 将标签设置为 TimePicker。

因为 TimePicker 是 TimePickerDialog 的一部分，设置 标签的最简单方法 似乎是（再次）TimePicker_Fragment 实施 TimePickerDialog.OnTimeSetListener。但是这一次，Activity 可以实现相同的接口：

TimePicker_Fragment

中的代码

void onTimeSet(TimePicker timePicker, int i, int i2){
    timePicker.setTag("TIME_PICKER");
    ((TimePickerDialog.OnTimeSetListener)getActivity()).onTimeSet(timePicker, i, i2);
}

Activity

中的代码

void onTimeSet(TimePicker timePicker, int i, int i2){
    String tag = (String)timePicker.getTag();
    switch(tag){
        case "TIME_PICKER":
            // code for time  picker 1 here
            break;
        case "TIME_PICKER_2":
            // code for time  picker 2 here
            break;
    }
    // ...
}

为三个相关组件实现第二种解决方案的代码：

MainActivity.java

public class MainActivity extends AppCompatActivity implements TimePickerDialog.OnTimeSetListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, new Work()).commit();
    }

    public void onTimeSet(TimePicker timePicker, int i, int i1){
        String tag = (String)timePicker.getTag();
        switch(tag){
            case TIME_PICKER:
                TextView textView = (TextView)findViewById(R.id.textstart);
                textView.setText("Start Hour: "+ i + " Minutes: "+ i1);
                break;
            case TIME_PICKER_2:
                TextView textView2 = (TextView)findViewById(R.id.textend);
                textView2.setText("Start Hour: "+ i + " Minutes: "+ i1);
                break;
        }
    }
}

Work.java

public class Work extends Fragment {

    public static final String TIME_PICKER = "TIME_PICKER";
    public static final String TIME_PICKER_2 = "TIME_PICKER_2";

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.frag_work, container, false);
        getActivity().setTitle("Work");

        Button timeButton = (Button) view.findViewById(R.id.btn1);
        timeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                DialogFragment timePicker = TimePicker_Fragment.instance(TIME_PICKER);
                timePicker.show(getFragmentManager(), "Time Picker");
            }
        });

        Button timeButton2 = (Button) view.findViewById(R.id.btn2);
        timeButton2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                DialogFragment timePicker2 =TimePicker_Fragment.instance(TIME_PICKER_2);
                timePicker2.show(getFragmentManager(), "Time Picker 2");
            }
        });

        return view;
    }
}

TimePicker_Fragment.java

public class TimePicker_Fragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener {

    private static final String KEY_TIMEPICKER_TAG = "KEY_TIMEPICKER_TAG";

    /**
     *
     * @param timePickerTag the tag by which you can identify a TimePicker.  
     *             Will be set as tag to the TimePicker View in onTimeSet()
     * @return x
     */
    public static TimePicker_Fragment instance(String timePickerTag){
        TimePicker_Fragment fragment = new TimePicker_Fragment();
        Bundle b = new Bundle();
        b.putString(KEY_TIMEPICKER_TAG, timePickerTag);
        fragment.setArguments(b);
        return fragment;
    }

    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
        Calendar c = Calendar.getInstance();
        int hour = c.get(Calendar.HOUR_OF_DAY);
        int minute = c.get(Calendar.MINUTE);
        Context ctx = getContext();
        return new TimePickerDialog(ctx, this, hour, minute, DateFormat.is24HourFormat(ctx));
    }

    public void onTimeSet(TimePicker timePicker, int i, int i2){
        Bundle b = getArguments();
        assert b != null;
        timePicker.setTag(b.getString(KEY_TIMEPICKER_TAG));
        ((TimePickerDialog.OnTimeSetListener)getActivity()).onTimeSet(timePicker, i, i2);
    }
}

如何在同一个 onTimeSet() 中提取两个时间选择器对话框的小时和分钟？

How do I extract the hours and minutes of two time picker dialogs in the same onTimeSet()?

java

android

android-fragments

timepicker