SeekBar进度条背景图片和按钮图标的动态切换

代码如下：

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package com.android.camera.manager;

import android.view.View;
import com.android.camera.Log;
import com.android.camera.R;

import android.graphics.Color;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Drawable;
import android.view.View;

import com.android.camera.Log;
import com.android.camera.ui.RotateModeItemView;

import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.graphics.Rect;

import com.android.camera.Util;
import android.content.Context;

public class ProferssionManager extends ViewManager implements View.OnClickListener{

    private SeekBar mProfessionSeekBar;
    private static Rect mBounds;
    private static final int[] PROFESSION_SEEKBAR_PROGRESS = new int[PROFESSION_NUM_COUNTS];
    static {
        PROFESSION_SEEKBAR_PROGRESS[0] = R.drawable.eq_seekbar_press1;
        PROFESSION_SEEKBAR_PROGRESS[1] = R.drawable.eq_seekbar_press2;
        PROFESSION_SEEKBAR_PROGRESS[2] = R.drawable.eq_seekbar_press3;
        PROFESSION_SEEKBAR_PROGRESS[3] = R.drawable.eq_seekbar_press4;
    };

    private static final int[] PROFESSION_SEEKBAR_THUMB = new int[PROFESSION_NUM_COUNTS];
    static {
        PROFESSION_SEEKBAR_THUMB[0] = R.drawable.eq_thumb1;
        PROFESSION_SEEKBAR_THUMB[1] = R.drawable.eq_thumb2;
        PROFESSION_SEEKBAR_THUMB[2] = R.drawable.eq_thumb3;
        PROFESSION_SEEKBAR_THUMB[3] = R.drawable.eq_thumb4;
    };

    public ProferssionManager(CameraActivity context) {
        super(context, VIEW_LAYER_OVERLAY);
    }

    @Override
    protected View getView() {
        View v = getContext().inflate(R.layout.proferssion_background, getViewLayer());
        
        mProfessionSeekBar.setThumb(getContext().getResources().getDrawable(R.drawable.eq_thumb_default));
        mProfessionSeekBar.setProgressDrawable(getContext().getResources().getDrawable(R.drawable.eq_seekbar_default));
        //一定要获取到原进度条的Bounds
mBounds = mProfessionSeekBar.getProgressDrawable().getBounds();
        return v;
    }


    @Override
    public void onClick(View view) {
        for (int i = 0; i < PROFESSION_NUM_COUNTS; i++) {
            //mProfessionViews[i]可以忽视，这只是一个判断条件
            if (mProfessionViews[i] == view) {
switchSeekBar(i);
            }
        }
    }
    public void switchSeekBar(int i) {
Drawable progressDrawable = getContext().getResources().getDrawable(PROFESSION_SEEKBAR_PROGRESS[i]);
mProfessionSeekBar.setProgressDrawable(progressDrawable);
//如果没有下面这一步，新切换的进度条背景图会拉伸填满整个进度条的布局
mProfessionSeekBar.getProgressDrawable().setBounds(mBounds);

Drawable thumbDrawable= getContext().getResources().getDrawable(PROFESSION_SEEKBAR_THUMB[i]);
mProfessionSeekBar.setThumb(thumbDrawable);
    }

    private void applyListener() {
        if (mProfessionSeekBar!= null) {
            mProfessionSeekBar.setOnSeekBarChangeListener(mSeekBarLisenter1);
        }
    }

    private OnSeekBarChangeListener mSeekBarLisenter = new OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
           //切换进度条背景和按钮后，监听会执行一次progress = 0 的操作，不知道为什么会如此，
           //但是这样会给编程中的一些操作造成困扰
        }

@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
    };
}