案例使用的图片如下:
1.在res/drawable目录下新增一个xml风格文件,seekbar_define_style.xml
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<? xml version = "1.0" encoding = "utf-8" ?> < layer-list xmlns:android = "http://schemas.android.com/apk/res/android" > <!-- 未选中 --> < item android:id = "@android:id/background" android:drawable = "@drawable/hou" /> <!-- 中 --> < item android:id = "@android:id/progress" android:drawable = "@drawable/qian" /> < item android:id = "@android:id/secondaryProgress" android:drawable = "@drawable/qian" /> </ layer-list > |
2.在res/drawable下定义个seekbar_thumb.xml文件
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<? xml version = "1.0" encoding = "utf-8" ?> < selector xmlns:android = "http://schemas.android.com/apk/res/android" > <!-- 按下状态--> < item android:state_focused = "true" android:state_pressed = "true" android:drawable = "@drawable/ic_launcher" /> <!-- 普通无焦点状态 -拖动按钮--> < item android:state_focused = "false" android:state_pressed = "false" android:drawable = "@drawable/orbino_icon_pack_006" /> <!-- 有焦点状态--> < item android:state_focused = "true" android:state_pressed = "false" android:drawable = "@drawable/ios" /> <!-- 有焦点 --> < item android:state_focused = "true" android:drawable = "@drawable/ios" /> </ selector > |
3.在res/layut下定义布局资源文件seekbar_define.xml
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<? xml version = "1.0" encoding = "utf-8" ?> < ScrollView xmlns:android = "<a href=" http://schemas.android.com/apk/res/android" rel = "nofollow" >http://schemas.android.com/apk/res/android</ a >" android:layout_width="fill_parent" android:layout_height="fill_parent" > < LinearLayout android:layout_width = "fill_parent" android:layout_height = "fill_parent" android:orientation = "vertical" > < TextView android:id = "@+id/seekbar_tetview_one" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:text = "SeekBar自定义" /> < TextView android:id = "@+id/seekbar_tetview_two" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:text = "SeekBar拖动时信息提示" /> < SeekBar android:layout_width = "321px" android:layout_height = "wrap_content" android:layout_centerInParent = "true" android:maxHeight = "20px" android:minHeight = "20px" android:paddingLeft = "18px" android:paddingRight = "18px" android:max = "100" android:progressDrawable = "@drawable/seekbar_define_style" android:thumb = "@drawable/seekbar_thumb" android:id = "@+id/seekBar" /> </ LinearLayout > </ ScrollView > |
4.定义java文件通过 引用布局文件:
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package com.test; import android.R.integer; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; import android.widget.TextView; public class SeekBarDemo_DefineDemo extends Activity { private SeekBar seekBar; private TextView textView_one, textView_two; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.seekbar_define); seekBar = (SeekBar) findViewById(R.id.seekBar); textView_one = (TextView) findViewById(R.id.seekbar_tetview_one); textView_two = (TextView) findViewById(R.id.seekbar_tetview_two); seekBar.setOnSeekBarChangeListener(seekbarChangeListener); } private OnSeekBarChangeListener seekbarChangeListener = new OnSeekBarChangeListener() { // 停止拖动时执行 @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub textView_two.setText( "停止拖动了!" ); } // 在进度开始改变时执行 @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub textView_two.setText( "进度开始改变" ); } // 当进度发生改变时执行 @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { textView_two.setText( "正在进行拖动操作,还没有停下来一直再拖动" ); Message message = new Message(); Bundle bundle = new Bundle(); // 存放数据 float pro = seekBar.getProgress(); float num = seekBar.getMax(); float result = (pro / num) * 100 ; bundle.putFloat( "key" , result); message.setData(bundle); message.what = 0 ; handler.sendMessage(message); } }; /** * 用Handler来更新UI */ private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { textView_one.setText( "当前拖动位置占 : " + msg.getData().getFloat( "key" ) + "/100" ); } }; } |
最后执行效果:
二:使用颜色显示,和尚面是一样的,只有我们定义颜色资源来替代图片资源文件seekbar_define_color_style.xml:如下:
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<? xml version = "1.0" encoding = "UTF-8" ?> < layer-list xmlns:android = "http://schemas.android.com/apk/res/android" > < item android:id = "@android:id/background" android:paddingTop = "3px" android:paddingBottom = "3px" > < shape > < corners android:radius = "10dip" /> < gradient android:startColor = "#ffffffff" android:centerColor = "#ff000000" android:endColor = "#ff808A87" android:centerY = "0.45" android:angle = "270" /> </ shape > </ item > < item android:id = "@android:id/progress" android:paddingTop = "3px" android:paddingBottom = "3px" > < clip > < shape > < corners android:radius = "10dip" /> < gradient android:startColor = "#ffffffff" android:centerColor = "#ffFFFF00" android:endColor = "#ffAABD00" android:centerY = "0.45" android:angle = "270" /> </ shape > </ clip > </ item > </ layer-list > |
之后再SeekBar标签使用如下属性进行引入:其他保持不变
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android:progressDrawable="@drawable/seekbar_define_color_style" |
执行效果:
由于SeekBar的属性thumb引入了自定义的seekbar_thumb.xml文件,拖动图标是我们自定义的图片:除去这个属性
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android:thumb="@drawable/seekbar_thumb" |
就回复系统默认状态效果最后效果如下:
我们可以通过颜色值再次休息seekbar_thumb.xml文件,使拖动按钮设置成自定义颜色:
原文:http://www.cnblogs.com/wangfeng520/p/5481365.html