SeekBar制作可拖动的进度条

SeekBar的介绍

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SeekBar是ProgerssBar的子类

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• SeekBar的点击事件

  
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 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        seekbar=(SeekBar) findViewById(R.id.seekbar);
        text1=(TextView)findViewById(R.id.text1);
        text2=(TextView)findViewById(R.id.text2);
        seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
          //数值改变
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                text1.setText("正在拖动");
                text2.setText("当前数值："+progress);
            }
             //开始拖动
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                text1.setText("开始拖动");
            }
            //停止拖动
            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                text1.setText("停止拖动");
            }
        });
    }

• SeekBar和ProgerssBar的区别
• SeekBar可以用手指拖动
• ProgressBar用代码进行调整

自定义一个SeekBar

改变滑块的样式

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/select" android:state_pressed="true"  android:state_window_focused="true" />
    <item android:drawable="@drawable/select" android:state_focused="true" android:state_window_focused="true" />
    <item android:drawable="@drawable/select" android:state_selected="true"  android:state_window_focused="true"/>
    <item android:drawable="@drawable/normal"/>
</selector>

在xml文件引入此文件就可以啦

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