Android 滚动时间选择的示例代码

Sure! Here is a detailed guide on implementing a time picker with scrolling functionality in Android, along with two example explanations:

Step 1: Add Dependencies

To begin, make sure you have the necessary dependencies in your project's build.gradle file:

dependencies {
    implementation 'com.wdullaer:materialdatetimepicker:4.3.0'
}

Step 2: Create Layout

Next, create a layout file (activity_main.xml) that contains the necessary views for the time picker:

<LinearLayout xmlns:android=\"http://schemas.android.com/apk/res/android\"
    android:layout_width=\"match_parent\"
    android:layout_height=\"match_parent\"
    android:orientation=\"vertical\">

    <Button
        android:id=\"@+id/btn_pick_time\"
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
        android:text=\"Pick Time\" />

    <TextView
        android:id=\"@+id/tv_selected_time\"
        android:layout_width=\"wrap_content\"
        android:layout_height=\"wrap_content\"
        android:text=\"Selected Time: \" />

</LinearLayout>

Step 3: Implement Time Picker

In your activity or fragment, implement the time picker functionality:

import com.wdullaer.materialdatetimepicker.time.TimePickerDialog;
import com.wdullaer.materialdatetimepicker.time.Timepoint;

public class MainActivity extends AppCompatActivity implements TimePickerDialog.OnTimeSetListener {

    private TextView tvSelectedTime;

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

        tvSelectedTime = findViewById(R.id.tv_selected_time);

        Button btnPickTime = findViewById(R.id.btn_pick_time);
        btnPickTime.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showTimePicker();
            }
        });
    }

    private void showTimePicker() {
        Calendar now = Calendar.getInstance();
        TimePickerDialog timePickerDialog = TimePickerDialog.newInstance(
                MainActivity.this,
                now.get(Calendar.HOUR_OF_DAY),
                now.get(Calendar.MINUTE),
                true
        );

        timePickerDialog.show(getSupportFragmentManager(), \"TimePickerDialog\");
    }

    @Override
    public void onTimeSet(TimePickerDialog view, int hourOfDay, int minute, int second) {
        String selectedTime = String.format(Locale.getDefault(), \"%02d:%02d:%02d\", hourOfDay, minute, second);
        tvSelectedTime.setText(\"Selected Time: \" + selectedTime);
    }
}

In this example, we use the com.wdullaer:materialdatetimepicker library to create the time picker. The showTimePicker() method is called when the \"Pick Time\" button is clicked, which displays the time picker dialog. The selected time is then displayed in the TextView.

That's it! You now have a time picker with scrolling functionality in your Android app. Feel free to customize the layout and appearance of the time picker according to your needs.

I hope this guide helps! Let me know if you have any further questions.