Android(安卓)SeekBar(拖动条)
16lz
2021-12-04
效果图
xml文件:
<?xml version="1.0" encoding="utf-8"?>
java代码:
package com.example.blogtest;import android.graphics.BitmapFactory;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.Gravity;import android.widget.CompoundButton;import android.widget.RatingBar;import android.widget.SeekBar;import android.widget.Switch;import android.widget.TextView;import android.widget.Toast;import android.widget.ToggleButton;public class MainActivity extends AppCompatActivity { private TextView tv_main_text; private SeekBar sb_main_seek; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //根据id获得SeekBar的控件 sb_main_seek = (SeekBar) findViewById(R.id.sb_main_seek); tv_main_text = (TextView) findViewById(R.id.tv_main_text); //设置SeekBar控件的监听 sb_main_seek.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){ @Override //获取滑动过程的值 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { tv_main_text.setText("当前的值为:"+progress); } //开始滑动 @Override public void onStartTrackingTouch(SeekBar seekBar) { } //结束滑动 @Override public void onStopTrackingTouch(SeekBar seekBar) { } }); }}
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