可以随着SeekBar滑块滑动显示的Demo

//关于Seek的自定义样式，之前也有总结过，但是，一直做不出随着滑块移动的效果，查询了很多资料终于解决了这个问题，现在把代码写出来有bug的地方

希望大家批评指正。

Step 1 ：自定义一个Viewgroup的类：

package com.example.seekbartest;

import android.content.Context;
import android.util.AttributeSet;
import android.view.ViewGroup;

public class TextMoveLayout extends ViewGroup {

    public TextMoveLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        // TODO Auto-generated method stub

    }

    public TextMoveLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }

    public TextMoveLayout(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }

}

Step 2 ： 在布局文件中放置简单的布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <com.example.seekbartest.TextMoveLayout
        android:id="@+id/textLayout"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        />
    <SeekBar
        android:id="@+id/seekBar1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

Step 3 ：在MainActivity中进行业务逻辑的操作

package com.example.seekbartest;

import android.support.v7.app.ActionBarActivity;
import android.annotation.SuppressLint;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;


@SuppressLint("NewApi") public class MainActivity extends ActionBarActivity {
    private SeekBar sb;
    private int step;
    private TextMoveLayout textLayout;
    private TextView text;
    private int screenWidth;
    private ViewGroup.LayoutParams params;
    

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sb = (SeekBar)findViewById(R.id.seekBar1);
        text = new TextView(this);
        textLayout = (TextMoveLayout)findViewById(R.id.textLayout);
        screenWidth = getWindowManager().getDefaultDisplay().getWidth();
   /*     screenWidth = getWindowManager().getDefaultDisplay().getWidth();
                text = new TextView(this);
                text.setBackgroundColor(Color.rgb(245, 245, 245));
                text.setTextColor(Color.rgb(0, 161, 229));
                text.setTextSize(16);
                layoutParams = new ViewGroup.LayoutParams(screenWidth, 50);
                textMoveLayout = (TextMoveLayout) findViewById(R.id.textLayout);
                textMoveLayout.addView(text, layoutParams);
                text.layout(0, 20, screenWidth, 80);*/
        text.setBackgroundColor(Color.rgb(240, 240, 240));
        text.setTextColor(Color.rgb(0, 161,229));
        text.setTextSize(12);
        params = new ViewGroup.LayoutParams(screenWidth, 50);
        textLayout.addView(text, params);
        text.layout(0, 20, screenWidth, 80);
        
        sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
            
            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                hideText();
                
            }
            
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                showText();
                
            }
            
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress,
                    boolean fromUser) {
                // TODO Auto-generated method stub
/*                text.layout((int) (progress * moveStep), 20, screenWidth, 80);
                text.setText(getCheckTimeBySeconds(progress, startTimeStr));*/
                showText();
                text.layout((int)progress*sb.getWidth()/sb.getMax(), 20, screenWidth, 80);
                text.setText(progress+"%");
            }
        });
        
    }
    public void hideText(){
        text.setAlpha(0);
        
    }
    public void showText(){
        text.setAlpha(1);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

Step ：效果图

不拖动滑块时的效果：

拖动滑块时的效果