今天搞了一天不用XML，在java程序代码中修改ProgressBar的样式，网上找来半天都没有，好在还是弄出来了！

ProgressBar pb = new ProgressBar(this,null,android.R.attr.progressBarStyleHorizontal);

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(200,20);

params.setMargins(10, 10, 0, 0);

pb.setLayoutParams(params);

pb.setMax(100);

pb.setProgress(45);

pb.setSecondaryProgress(50);

LayerDrawable progressDrawable = (LayerDrawable) pb.getProgressDrawable();

Drawable[] outDrawables = new Drawable[progressDrawable.getNumberOfLayers()];

for (int i = 0; i < progressDrawable.getNumberOfLayers(); i++) {

switch (progressDrawable.getId(i)) {

case android.R.id.background://设置进度条背景

outDrawables[i] = progressDrawable.getDrawable(i);

break;

case android.R.id.secondaryProgress://设置二级进度条

//

outDrawables[i] = progressDrawable.getDrawable(i);

break;

case android.R.id.progress://设置进度条

GradientDrawable mDrawable = new GradientDrawable(

GradientDrawable.Orientation.TOP_BOTTOM,

new int[] {Color.parseColor("#FF0000"), Color.parseColor("#ff747674")});

mDrawable.setGradientCenter(0.0f, 0.75f);

mDrawable.setGradientRadius((float)(Math.sqrt(5) * 60));

mDrawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);

mDrawable.setCornerRadii(new float[] { 5, 5, 5, 5, 5, 5, 5, 5 });

ClipDrawable oidDrawable = (ClipDrawable) progressDrawable.getDrawable(i);

ClipDrawable proDrawable = new ClipDrawable(mDrawable, Gravity.LEFT,ClipDrawable.HORIZONTAL);

proDrawable.setLevel(oldDrawable.getLevel());

outDrawables[i] = proDrawable;

break;

default:

break;

}

}

progressDrawable = new LayerDrawable(outDrawables);

pb.setProgressDrawable(progressDrawable);