Android拖动条的实现代码

本文实例为大家分享了Android拖动条的具体代码，供大家参考，具体内容如下

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
 tools:context="com.amy.seekbartest.MainActivity"> 

 <TextView
  android:id="@+id/textView1"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="当前值：50"
  android:textSize="16sp"
  android:paddingTop="40dp"
  android:paddingLeft="15dp"
  tools:layout_editor_absoluteY="0dp"
  tools:layout_editor_absoluteX="0dp" />
 <!-- 拖动条 -->
 <SeekBar
  android:id="@+id/seekBar1"
  android:layout_height="wrap_content"
  android:max="100"
  android:layout_width="match_parent"
  android:progress="50"
  android:paddingTop="10dp"
  tools:layout_editor_absoluteY="0dp"
  tools:layout_editor_absoluteX="32dp" />
</android.support.constraint.ConstraintLayout>

MainActivity.java

package com.amy.seekbartest; 

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast; 

public class MainActivity extends AppCompatActivity { 

 private SeekBar seekBar;//拖动条
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  final TextView result = (TextView) findViewById(R.id.textView1);
  seekBar = (SeekBar) findViewById(R.id.seekBar1);
  seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
   @Override
   public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
    result.setText("当前值："+progress);
   } 

   @Override
   public void onStartTrackingTouch(SeekBar seekBar) {
    Toast.makeText(MainActivity.this,"开始滑动",Toast.LENGTH_SHORT).show();
   } 

   @Override
   public void onStopTrackingTouch(SeekBar seekBar) {
    Toast.makeText(MainActivity.this,"结束滑动",Toast.LENGTH_SHORT).show();
   }
  });
 }
}

效果图：

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