Android NumberPicker 使用

相关方法：

mNumberPickerLow.setMinValue(1);
mNumberPickerLow.setMaxValue(20);
mNumberPickerLow.setValue(15);

代码：

package shortcut.song.com.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.NumberPicker;
import android.widget.TextView;

public class NumberPickerActivity extends AppCompatActivity {

    private NumberPicker mNumberPickerLow;
    private NumberPicker mNumberPickerHigh;

    int miniPrice = 10;
    int maxPrice = 100;

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

        mNumberPickerLow = (NumberPicker)findViewById(R.id.number_picker_low);
        mNumberPickerHigh = (NumberPicker)findViewById(R.id.number_picker_high);

        mNumberPickerLow.setMinValue(1);
        mNumberPickerLow.setMaxValue(20);
        mNumberPickerLow.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
                TextView mShowLow = (TextView)findViewById(R.id.tv_numberpicker_show_low);
                mShowLow.setText("Low Price:"+newVal +"  "+oldVal);
            }
        });

        mNumberPickerHigh.setMinValue(80);
        mNumberPickerHigh.setMaxValue(100);
        mNumberPickerHigh.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
                TextView mShowHigh = (TextView)findViewById(R.id.tv_numberpicker_show_high);
                mShowHigh.setText("High Price:"+newVal +"  "+oldVal);
            }
        });
    }
}

xml布局：

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="shortcut.song.com.myapplication.NumberPickerActivity">

    <TextView
        android:id="@+id/tv_numberpicker_show_low"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />
    <NumberPicker
        android:id="@+id/number_picker_low"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/tv_numberpicker_show_low"
        android:focusable="true"
        android:focusableInTouchMode="true"
        />

    <TextView
        android:id="@+id/tv_numberpicker_show_high"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/number_picker_low"
        />

    <NumberPicker
        android:id="@+id/number_picker_high"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/tv_numberpicker_show_high"
        android:focusable="true"
        android:focusableInTouchMode="true"
        />

</RelativeLayout>

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