Android(安卓)SeekBar 拖动条 滑动条
16lz
2021-01-26
SeekBar可以作为音乐播放器的进度指示和调整工具,音量调整工具等,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
2、java:
3、运行程序:
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. */@Overridepublic 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() {@Overridepublic void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {tv1.setText("当前进度:" + sb.getProgress());Toast.makeText(getApplicationContext(), "onProgressChanged",Toast.LENGTH_SHORT).show();}@Overridepublic void onStartTrackingTouch(SeekBar seekBar) {Toast.makeText(getApplicationContext(), "onStartTrackingTouch",Toast.LENGTH_SHORT).show();}@Overridepublic void onStopTrackingTouch(SeekBar seekBar) {Toast.makeText(getApplicationContext(), "onStopTrackingTouch",Toast.LENGTH_SHORT).show();}};// 为拖动条绑定监听器sb.setOnSeekBarChangeListener(osbcl);}}
3、运行程序:
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