Android SeekBar显示进度在thumb上

参考：
参考进行了修改

参考网上的一个项目进行了修改，只保留了两个按钮，和一个进度条，可以显示进度到拖动按钮，效果如下：

xml布局文件

             <com.tcl.navigator.setting.view.mSeekBar
                android:id="@+id/day_light_progress"
                android:layout_width="352px"
                android:layout_height="wrap_content"
                android:layout_toRightOf="@id/btn_screen_brightness_minus"
                android:layout_marginLeft="10px"
                android:focusable="false"
                android:max="15"
                android:progressDrawable="@drawable/seekbar_horizonta"
                android:paddingLeft="18px"
                android:paddingRight="18px"
                android:thumbOffset="0px"
                android:maxHeight="4px"
                android:minHeight="4px" />

SeekBar.java 代码文件

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.SeekBar;

public class mSeekBar extends SeekBar {
    //比例对应的原点分辨率
    private int ScreenWidth = 720;
    private int screenHeight = 1280;
    private Drawable thumb;
    private Resources res;
    private Paint paint;
    private Bitmap bmp;
    private Drawable mThumb;

    public mSeekBar(Context context) {
        this(context, null);
    }

    @SuppressWarnings("deprecation")
    public mSeekBar(Context context, AttributeSet attrs) {
        super(context, attrs);

        paint = new Paint();
        paint.setTextAlign(Paint.Align.CENTER);
        paint.setColor(getResources().getColor(R.color.color_white));
        res = context.getResources();
        if(Pixels.getpixels_x(100) == 720){
            bmp = BitmapFactory.decodeResource(res, R.drawable.seek_thumb);
        }else{
            bmp = BitmapFactory.decodeResource(res, R.drawable.seek_thumb);
        }
        thumb = new BitmapDrawable(bmp);

       paint.setTextSize(30);
        // 设置拖动的图片
        setThumb(thumb);
        // 图片的位置
        setThumbOffset(thumb.getIntrinsicWidth());
    }

    @Override
    public void setThumb(Drawable thumb) {
        // TODO Auto-generated method stub
        super.setThumb(thumb);
        this.mThumb = thumb;
    }

    public Drawable getSeekBarThumb(){
        return mThumb;
    }

    //设置thumb的偏移数值
    @Override
    public void setThumbOffset(int thumbOffset) {
        // TODO Auto-generated method stub
        super.setThumbOffset(thumbOffset/3);
    }

    String temp_str = "0";
    @Override
    protected synchronized void onDraw(Canvas canvas) {
        // TODO Auto-generated method stub
        super.onDraw(canvas);
        canvas.save();
        int data = Integer.parseInt(temp_str);
        Rect rect = getSeekBarThumb().getBounds();
        float fontwidth = paint.measureText(temp_str);
        if(data < 10){
            canvas.drawText(temp_str, rect.left + (rect.width()) /2.0F, rect.top - paint.ascent() + (rect.height() - (paint.descent() - paint.ascent()))/2.0F,  paint);
        }else{
            canvas.drawText(temp_str, rect.left + (rect.width() ) /2.0F, rect.top - paint.ascent() + (rect.height() - (paint.descent() - paint.ascent()))/2.0F,  paint);    
        }

        canvas.restore();
    }

    private  Bitmap drawableToBitmap(Drawable drawable) {
        // 取 drawable 的长宽
        int w = drawable.getIntrinsicWidth();
        int h = drawable.getIntrinsicHeight();
        // 取 drawable 的颜色格式
        Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
                : Bitmap.Config.RGB_565;
        // 建立对应 bitmap
        Bitmap bitmap = Bitmap.createBitmap(w, h, config);
        // 建立对应 bitmap 的画布
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, w, h);
        // 把 drawable 内容画到画布中
        drawable.draw(canvas);
        return bitmap;
    }

    public void SetValue(String value){
        StringBuffer sb = new StringBuffer();
        sb.append(value);
        temp_str = sb.toString();
        invalidate();
    }

    @SuppressLint("NewApi")
    @Override
    protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    @Override
    public void setOnSeekBarChangeListener(final OnSeekBarChangeListener l) {
        super.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                if (l != null) {
                    l.onProgressChanged(seekBar, progress, fromUser);
                }
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {


                if (l != null) {
                    l.onStartTrackingTouch(seekBar);
                }
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

                if (l != null) {
                    l.onStopTrackingTouch(seekBar);
                }
            }
        });
    }
}

Pixels.java 代码文件

import android.app.Activity;
import android.util.DisplayMetrics;

/**
 * 获得屏幕像素 
 * @author Administrator
 *
 */
public class Pixels {

    private static int[] px = new int[101];
    private static int[] py = new int[101];
    private int w,h;
    private DisplayMetrics dm;
    public Pixels(Activity activity){
        dm = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
        w = dm.widthPixels;
        h = dm.heightPixels;
        int length = px.length;
        for(int index=0;indexint)(w*0.01*index);
            py[index] = (int)(h*0.01*index);
        }
    }
    /**
     * 获得x点值
     * @param index
     * @return
     */
    public static int getpixels_x(int index){
        return px[index];
    }
    /**
     * 获得y点值
     * @param index
     * @return
     */
    public static int getpixels_y(int index){
        return py[index];
    }
}

seekbar_horizonta.xml

 <layer-list  
  xmlns:android="http://schemas.android.com/apk/res/android">  
    <item android:id="@android:id/background">  
        <shape>  
             <corners android:radius="5.0dip" />
            <solid android:color="#878278"/>
        shape>  
    item>  
    <item android:id="@android:id/secondaryProgress">  
        <clip>  
            <shape>  
                 <corners android:radius="5.0dip" />
                <solid android:color="#878278" />
            shape>  
        clip>  
    item>  
    <item android:id="@android:id/progress">  
        <clip>  
            <shape>  
                 <corners android:radius="5.0dip" />
                <solid android:color="#878278" /> 
            shape>  
        clip>  
    item>  
layer-list>

调用代码文件

        private mSeekBar dayLightProgress
        dayLightProgress.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

            @Override
            public void onStopTrackingTouch(SeekBar arg0) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onStartTrackingTouch(SeekBar arg0) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                // TODO Auto-generated method stub
                dayLightProgress.SetValue(progress+"");

            }
        });