Androidseekbar实现可拖动进度条

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>

 
 
 
 
 
 
 

package com.example.lenovo.seekbar;
 
import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
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=findViewById(R.id.tv1);
    tv2=findViewById(R.id.tv2);
    seekBar=findViewById(R.id.seekBar);
    //设置监听器 监听数值改变情况
    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("停止拖动");
  }
}