Android change color of ImageView / Bitmap

问题:

I need to find a way to change the color of bitmap in Android. I need to replace/change colors of oval image smoothly in my application depending on int value. I need something like if myValue=5 than change my image's color to RED and if myValue=322 change color to BLUE. The only way which I find I can do this was using xml file which looks like this :

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval" android:padding="10dp">
<!-- you can use any color you want I used here gray color-->
 <solid android:color="#cccccc"/> 
    <corners
     android:bottomRightRadius="10dp"
     android:bottomLeftRadius="10dp"
     android:topLeftRadius="10dp"
     android:topRightRadius="10dp"/>
</shape>

and after that when myValue is changing to set my ImageView image resource. But in this way I have to create 35 different xml files...which I don't think is a good idea.

So anyone who can suggest better solution to do this?

回答1:

This is how I solved this issue :

1. Declare an ImageView with src="@drawable/button"
2. Create a Drawable and set ColorFilter to it and after that use it as src to your declared ImageView like this :

>

Drawable myIcon = getResources().getDrawable( R.drawable.button );
ColorFilter filter = new LightingColorFilter( Color.BLUE, Color.BLUE );
myIcon.setColorFilter(filter);
color.setImageDrawable(myIcon);

回答2:

This solution doesn't work very well for me. In some images the final color was wrong. I use this solution instead:

Drawable myIcon = getResources().getDrawable(R.drawable.your_image); 
myIcon.setColorFilter(Color.BLUE, PorterDuff.Mode.SRC_ATOP); 
((ImageView)findViewById(R.id.view_to_change)).setImageDrawable(myIcon);

回答3:

getResources().getDrawable( R.drawable.button );

is now deprecated. Can also do it this way:

((ImageView) findViewById(R.id.my_icon))
  .setColorFilter(new LightingColorFilter(Color.BLUE, Color.BLUE));

回答4:

Should you this.

Drawable myIcon = getResources().getDrawable( R.drawable.button ); 
ColorFilter filter = new LightingColorFilter( Color.BLACK, Color.BLACK);
myIcon.setColorFilter(filter);

回答5:

You can use a TransitionDrawable to achieve this - http://developer.android.com/reference/android/graphics/drawable/TransitionDrawable.html