change the color of a ProgressBar based on a variable

Question

I'm making an Android app with some ProgressBars. The ProgressBar background must always be white, while the progress color must change based on a variable, for example:

• if i <= 50: the color must be green
• if i > 50: the color must be red

This is the XML file of the ProgressBar style:

 <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item> <shape android:shape="ring" android:thicknessRatio="16" android:useLevel="false"> <solid android:color="#FFFF"/> </shape> </item> <item android:id="@android:id/progress"> <shape android:shape="ring" android:thicknessRatio="16" android:useLevel="true"> <solid android:color="@color/white" /> </shape> </item> </layer-list>

The progress color is set to white as the background. How could i change it?

Answer 1

Set up your progress bar in xml:

 <ProgressBar
    android:id="@+id/progressBar1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:indeterminateDrawable="@drawable/nameofyourcustomprogressbar"

When you access the spinner you can set the progress color property:

ProgressBar spinner = (ProgressBar) findViewById(R.id.progressBar1);
spinner.getIndeterminateDrawable().setColorFilter(Color.parseColor("#bb86fc"), PorterDuff.Mode.MULTIPLY);

The #bb86fc is a color in a hex string format.

If you had listed a color in values/colors.xml and wanted to access a color that way:

<resources>
    <color name="purple_200">#FFBB86FC</color>
</resources>

Access the color you want from values/colors.xml :

Color.parseColor(getString(R.color.purple_200));

If you get an error underline - "expected resource of type string" just add the annotation

@SuppressLint("ResourceType")