博客

运行截图：

拖动时变颜色

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.lenovo.seekbar.MainActivity">

    <SeekBar
        android:thumb="@drawable/my_thumb"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/seekBar"
        android:max="100"
        android:progress="50"
        />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/tv1"
        />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/tv2"
        />

</LinearLayout>

my_thumb.xml

select和normal是两张图片，可以换成别的图片哦

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/select" android:state_pressed="true" android:state_window_focused="true"/>
    <item android:drawable="@drawable/select" android:state_focused="true" android:state_window_focused="true"/>
    <item android:drawable="@drawable/select" android:state_selected="true" android:state_window_focused="true"/>
    <item android:drawable="@drawable/normal"/>

</selector>

MainActivity.java

package com.example.lenovo.seekbar;

import android.app.Activity;
import android.os.Bundle;
import android.widget.SeekBar;
import android.widget.TextView;

public class MainActivity extends Activity implements SeekBar.OnSeekBarChangeListener{

    private  SeekBar seekBar;
    private TextView tv1;
    private TextView tv2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv1=(TextView)findViewById(R.id.tv1);
        tv2=(TextView)findViewById(R.id.tv2);
        seekBar=(SeekBar)findViewById(R.id.seekBar);
        seekBar.setOnSeekBarChangeListener(this);
    }

    //数值改变
    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

        tv1.setText("正在拖动");
        tv2.setText("当前数值："+progress);

    }

    //开始拖动
    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {

        tv1.setText("开始拖动");
    }

    //停止拖动
    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {

        tv1.setText("终止拖动");
    }
}