我在我的Android应用程序中使用水平进度条，我想改变它的进度颜色(默认为黄色)。我如何使用代码(而不是XML)做到这一点?
当前回答
水平ProgressBar使用矩形形状绘制背景，ClipDrawable从矩形形状构建的进展(主要和次要)。着色将颜色改变为某种色调。如果你想分别为这三种颜色设置目标颜色，你可以使用ProgressBar.setProgressDrawable()，如下所示:
LayerDrawable progressBarDrawable = new LayerDrawable(
new Drawable[]{
new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
new int[]{Color.parseColor("#ff0000ff"),Color.parseColor("#ff0000ff")}),
new ClipDrawable(
new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
new int[]{Color.parseColor("#ff00ff00"),Color.parseColor("#ff00ff00")}),
Gravity.START,
ClipDrawable.HORIZONTAL),
new ClipDrawable(
new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
new int[]{Color.parseColor("#ffff0000"),Color.parseColor("#ffff0000")}),
Gravity.START,
ClipDrawable.HORIZONTAL)
});
progressBarDrawable.setId(0,android.R.id.background);
progressBarDrawable.setId(1,android.R.id.secondaryProgress);
progressBarDrawable.setId(2,android.R.id.progress);
((ProgressBar)findViewById(R.id.progressBar)).setProgressDrawable(progressBarDrawable);
注意，在初始化LayerDrawable时，可绘制层的顺序很重要。首先绘制的应该是背景。根据我的实验，切换id是行不通的。如果你将填充设置为progressbar，那么这种方法将不起作用。如果你需要填充，那么你可以使用一个容器的进度条，如线性布局。
其他回答
适用于SDK 21及以上版本
android:indeterminateTint="@color/orange"
对我来说是很简单的。
水平ProgressBar使用矩形形状绘制背景，ClipDrawable从矩形形状构建的进展(主要和次要)。着色将颜色改变为某种色调。如果你想分别为这三种颜色设置目标颜色，你可以使用ProgressBar.setProgressDrawable()，如下所示:
LayerDrawable progressBarDrawable = new LayerDrawable(
new Drawable[]{
new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
new int[]{Color.parseColor("#ff0000ff"),Color.parseColor("#ff0000ff")}),
new ClipDrawable(
new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
new int[]{Color.parseColor("#ff00ff00"),Color.parseColor("#ff00ff00")}),
Gravity.START,
ClipDrawable.HORIZONTAL),
new ClipDrawable(
new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,
new int[]{Color.parseColor("#ffff0000"),Color.parseColor("#ffff0000")}),
Gravity.START,
ClipDrawable.HORIZONTAL)
});
progressBarDrawable.setId(0,android.R.id.background);
progressBarDrawable.setId(1,android.R.id.secondaryProgress);
progressBarDrawable.setId(2,android.R.id.progress);
((ProgressBar)findViewById(R.id.progressBar)).setProgressDrawable(progressBarDrawable);
注意，在初始化LayerDrawable时，可绘制层的顺序很重要。首先绘制的应该是背景。根据我的实验，切换id是行不通的。如果你将填充设置为progressbar，那么这种方法将不起作用。如果你需要填充，那么你可以使用一个容器的进度条，如线性布局。
如果有人想通过编程改变颜色:
progressBar.progressTintList = ColorStateList.valueOf(Color.RED)
对于水平风格的ProgressBar，我使用:
import android.widget.ProgressBar;
import android.graphics.drawable.GradientDrawable;
import android.graphics.drawable.ClipDrawable;
import android.view.Gravity;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
public void setColours(ProgressBar progressBar,
int bgCol1, int bgCol2,
int fg1Col1, int fg1Col2, int value1,
int fg2Col1, int fg2Col2, int value2)
{
//If solid colours are required for an element, then set
//that elements Col1 param s the same as its Col2 param
//(eg fg1Col1 == fg1Col2).
//fgGradDirection and/or bgGradDirection could be parameters
//if you require other gradient directions eg LEFT_RIGHT.
GradientDrawable.Orientation fgGradDirection
= GradientDrawable.Orientation.TOP_BOTTOM;
GradientDrawable.Orientation bgGradDirection
= GradientDrawable.Orientation.TOP_BOTTOM;
//Background
GradientDrawable bgGradDrawable = new GradientDrawable(
bgGradDirection, new int[]{bgCol1, bgCol2});
bgGradDrawable.setShape(GradientDrawable.RECTANGLE);
bgGradDrawable.setCornerRadius(5);
ClipDrawable bgclip = new ClipDrawable(
bgGradDrawable, Gravity.LEFT, ClipDrawable.HORIZONTAL);
bgclip.setLevel(10000);
//SecondaryProgress
GradientDrawable fg2GradDrawable = new GradientDrawable(
fgGradDirection, new int[]{fg2Col1, fg2Col2});
fg2GradDrawable.setShape(GradientDrawable.RECTANGLE);
fg2GradDrawable.setCornerRadius(5);
ClipDrawable fg2clip = new ClipDrawable(
fg2GradDrawable, Gravity.LEFT, ClipDrawable.HORIZONTAL);
//Progress
GradientDrawable fg1GradDrawable = new GradientDrawable(
fgGradDirection, new int[]{fg1Col1, fg1Col2});
fg1GradDrawable.setShape(GradientDrawable.RECTANGLE);
fg1GradDrawable.setCornerRadius(5);
ClipDrawable fg1clip = new ClipDrawable(
fg1GradDrawable, Gravity.LEFT, ClipDrawable.HORIZONTAL);
//Setup LayerDrawable and assign to progressBar
Drawable[] progressDrawables = {bgclip, fg2clip, fg1clip};
LayerDrawable progressLayerDrawable = new LayerDrawable(progressDrawables);
progressLayerDrawable.setId(0, android.R.id.background);
progressLayerDrawable.setId(1, android.R.id.secondaryProgress);
progressLayerDrawable.setId(2, android.R.id.progress);
//Copy the existing ProgressDrawable bounds to the new one.
Rect bounds = progressBar.getProgressDrawable().getBounds();
progressBar.setProgressDrawable(progressLayerDrawable);
progressBar.getProgressDrawable().setBounds(bounds);
// setProgress() ignores a change to the same value, so:
if (value1 == 0)
progressBar.setProgress(1);
else
progressBar.setProgress(0);
progressBar.setProgress(value1);
// setSecondaryProgress() ignores a change to the same value, so:
if (value2 == 0)
progressBar.setSecondaryProgress(1);
else
progressBar.setSecondaryProgress(0);
progressBar.setSecondaryProgress(value2);
//now force a redraw
progressBar.invalidate();
}
一个调用的例子是:
setColours(myProgressBar,
0xff303030, //bgCol1 grey
0xff909090, //bgCol2 lighter grey
0xff0000FF, //fg1Col1 blue
0xffFFFFFF, //fg1Col2 white
50, //value1
0xffFF0000, //fg2Col1 red
0xffFFFFFF, //fg2Col2 white
75); //value2
如果您不需要“次要进度”，只需将value2设置为value1。
ProgressBar freeRamPb = findViewById(R.id.free_ram_progress_bar);
freeRamPb.getProgressDrawable().setColorFilter(
Color.BLUE, android.graphics.PorterDuff.Mode.SRC_IN);
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