安卓——使用SeekBar制作可拖动的进度条

傷城~ 2022-05-29 05:18 227阅读 0赞

![Image 1][]

运行截图：

拖动时变颜色

![Image 1][]

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");
        }
    }

[Image 1]: