Android SeekBar实现滑动条效果

Z时代
2024-01-10
分类：IT

本文实例为大家分享了Android SeekBar实现滑动条效果的具体代码，供大家参考，具体内容如下

SeekBar是ProgressBar的一个子类，下面我们用一个可以改变并显示当前进度的拖动条例子来演示一下它的使用：

1、main.xml


<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:orientation="vertical" android:layout_width="fill_parent" 
  android:layout_height="fill_parent"> 
  <SeekBar android:id="@+id/SeekBar01" android:layout_width="245px" 
    android:layout_height="25px" android:paddingLeft="16px" 
    android:paddingRight="15px" android:paddingTop="5px" 
    android:paddingBottom="5px" android:progress="0" android:max="0" 
    android:secondaryProgress="0" /> 
  <TextView android:layout_width="fill_parent" 
    android:layout_height="wrap_content" android:text="@string/hello" 
    android:id="@+id/TextView01" /> 
</LinearLayout>

2、java：


package com.esri.arcgis.sample; 
import android.app.Activity; 
import android.os.Bundle; 
import android.widget.SeekBar; 
import android.widget.SeekBar.OnSeekBarChangeListener; 
import android.widget.TextView; 
import android.widget.Toast; 
public class AndroidSeekBar extends Activity { 
  /** Called when the activity is first created. */ 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    // 找到拖动条和文本框 
    final SeekBar sb = (SeekBar) findViewById(R.id.SeekBar01); 
    final TextView tv1 = (TextView) findViewById(R.id.TextView01); 
    // 设置拖动条的初始值和文本框的初始值 
    sb.setMax(100); 
    sb.setProgress(30); 
    tv1.setText("当前进度：" + sb.getProgress()); 
    // 设置拖动条改变监听器 
    OnSeekBarChangeListener osbcl = new OnSeekBarChangeListener() { 
      @Override 
      public void onProgressChanged(SeekBar seekBar, int progress, 
          boolean fromUser) { 
        tv1.setText("当前进度：" + sb.getProgress()); 
        Toast.makeText(getApplicationContext(), "onProgressChanged", 
            Toast.LENGTH_SHORT).show(); 
      } 
      @Override 
      public void onStartTrackingTouch(SeekBar seekBar) { 
        Toast.makeText(getApplicationContext(), "onStartTrackingTouch", 
            Toast.LENGTH_SHORT).show(); 
      } 
      @Override 
      public void onStopTrackingTouch(SeekBar seekBar) { 
        Toast.makeText(getApplicationContext(), "onStopTrackingTouch", 
            Toast.LENGTH_SHORT).show(); 
      } 
    }; 
    // 为拖动条绑定监听器 
    sb.setOnSeekBarChangeListener(osbcl); 
  } 
}