学习TimePicker和DataPicker

学习网易云课堂的android课程，练习代码

课堂地址 http://study.163.com/course/courseLearn.htm?courseId=207001#/learn/video?lessonId=426042&courseId=207001

布局文件

android studio会提示在ScrollView中的TimePicker和DataPicker的layout_height为wrap_content

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.zhanghaibo.myapplication.MainActivity">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            >
    <TimePicker
        android:id="@+id/my_timepicker"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"

        >
    </TimePicker>
    <DatePicker
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        >
    </DatePicker>
        </LinearLayout>
    </ScrollView>
</RelativeLayout>

Activity代码

public class MainActivity extends AppCompatActivity {
    TimePicker mTimePicker;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mTimePicker = (TimePicker) findViewById(R.id.my_timepicker);
        mTimePicker.setIs24HourView(true);
        mTimePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
            @Override
            public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
                makeTost("hour = " + hourOfDay + " min = " + minute);
            }
        });
    }

    private void makeTost(String body){
        Toast.makeText(this, body, Toast.LENGTH_SHORT).show();
    }
}

主要是设置OnTimeChangedListener监听用户的选择事件

效果图