Android SeekBar實現(xiàn)滑動條效果

2019-10-21 21:46:04

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本文實例為大家分享了Android SeekBar實現(xiàn)滑動條效果的具體代碼，供大家參考，具體內(nèi)容如下

SeekBar是ProgressBar的一個子類，下面我們用一個可以改變并顯示當(dāng)前進度的拖動條例子來演示一下它的使用：

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);      // 找到拖動條和文本框     final SeekBar sb = (SeekBar) findViewById(R.id.SeekBar01);     final TextView tv1 = (TextView) findViewById(R.id.TextView01);      // 設(shè)置拖動條的初始值和文本框的初始值     sb.setMax(100);     sb.setProgress(30);     tv1.setText("當(dāng)前進度：" + sb.getProgress());      // 設(shè)置拖動條改變監(jiān)聽器     OnSeekBarChangeListener osbcl = new OnSeekBarChangeListener() {        @Override       public void onProgressChanged(SeekBar seekBar, int progress,           boolean fromUser) {         tv1.setText("當(dāng)前進度：" + 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();       }      };      // 為拖動條綁定監(jiān)聽器     sb.setOnSeekBarChangeListener(osbcl);    } }

3、運行程序：

Android,SeekBar,滑動條