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
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。
其他回答
如果不确定的:
((ProgressBar)findViewById(R.id.progressBar))
.getIndeterminateDrawable()
.setColorFilter(Color.RED, PorterDuff.Mode.SRC_IN);
更改进度条的前景和背景颜色的最简单的方法是
<ProgressBar
style="@android:style/Widget.ProgressBar.Horizontal"
android:id="@+id/pb_main"
android:layout_width="match_parent"
android:layout_height="8dp"
android:progress="30"
android:progressTint="#82e9de"
android:progressBackgroundTint="#82e9de"
/>
只需添加
android:progressTint="#82e9de" //for foreground colour
android:progressBackgroundTint="#82e9de" //for background colour
简单的使用方法:
PorterDuff.Mode mode = PorterDuff.Mode.SRC_IN;
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.GINGERBREAD_MR1) {
mode = PorterDuff.Mode.MULTIPLY;
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
progressBar.setProgressTintList(ColorStateList.valueOf(Color.RED));
progressBar.setProgressBackgroundTintList(ColorStateList.valueOf(Color.RED));
} else {
Drawable progressDrawable;
progressDrawable = (progressBar.isIndeterminate() ? progressBar.getIndeterminateDrawable() : progressBar.getProgressDrawable()).mutate();
progressDrawable.setColorFilter(context.getResources().getColor(Color.RED), mode);
progressBar.setProgressDrawable(progressDrawable);
}
将此自定义样式应用于进度条。
<style name="customProgress" parent="@android:style/Widget.ProgressBar.Small">
<item name="android:indeterminateDrawable">@drawable/progress</item>
<item name="android:duration">40</item>
<item name="android:animationCache">true</item>
<item name="android:drawingCacheQuality">low</item>
<item name="android:persistentDrawingCache">animation</item>
</style>
@drawable / progress.xml -
<?xml version="1.0" encoding="utf-8"?>
<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@drawable/spinner_white"
android:pivotX="50%"
android:pivotY="50%" />
使用此类型的图像作为进度条。
为了获得更好的效果,您可以使用多个进度图像。请不要犹豫使用图像,因为Android平台本身使用图像作为进度条。 代码是从sdk中提取的:)
使用attr非常简单,如果你正在处理多风格的应用程序:
试试这个方法:
在属性attrs.xml下面声明
<attr name="circularProgressTheme" format="reference"></attr>
将下面的代码粘贴到styles.xml中
<style name="ProgressThemeWhite" parent="ThemeOverlay.AppCompat.Light">
<item name="colorAccent">#FF0000</item>
</style>
<style name="circularProgressThemeWhite">
<item name="android:theme">@style/ProgressThemeWhite</item>
</style>
<style name="AppTheme" parent="Theme.AppCompat.NoActionBar">
<item name="circularProgressTheme">@style/circularProgressThemeWhite</item>
</style>
使用进度条如下所示
<ProgressBar
style="?attr/circularProgressTheme"
android:id="@+id/commonProgress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="visible"/>
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