How to change Action Bar and Status Bar color in activity?

Question

I want to change the color of my action bar and status bar programmatically only on one activity, depending it's state, green for go and red for stop. I want to keep the system wide theme of orange and only have the red or green depending on the outcome of whats inside the activity, with an if Statement.
How could it be possible to do that?

I also need to change the colour of my status bar – Feb 22 '18 at 14:19 — , Feb 22 '18 at 14:19

Mattia Ferigutti · Accepted Answer · 2018-02-22T14:43:52.173

5

if I understand correctly you want to change from java code .. When you call an if try to use this method:

import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Build;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        changeColor(R.color.red);
    }


    public void changeColor(int resourseColor) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            getWindow().setStatusBarColor(ContextCompat.getColor(getApplicationContext(), resourseColor));
        }

        ActionBar bar = getSupportActionBar();
        bar.setBackgroundDrawable(new ColorDrawable(getResources().getColor(resourseColor)));

    }

}

edited Feb 22 '18 at 14:43

answered Feb 22 '18 at 14:25

Mattia Ferigutti

2,608
1
18
22

What do I call "red"? can I call it as a variable named "#FF0000 – Feb 22 '18 at 14:48
`R.color.red` is defined color name in *`res/values/colors.xml`*. Example: `#770000` @zarrexx – Dumbo Feb 22 '18 at 14:52
@MattDeveloper How to do that in lover version than API 21? – Dumbo Feb 22 '18 at 14:55
no but red is undefined – Feb 22 '18 at 15:00
How can i set it within the java rather than xml? – Feb 22 '18 at 15:01
`changeColor(Color.parseColor("#00FF00"));` causes my activity to crash – Feb 22 '18 at 15:05
@zarrexx if you want to use class variable with "#FF0000" value. You can use `Color.parseColor(stringVariable);` instead of `ContextCompat.getColor(getApplicationContext(), resourseColor)` and `getResources().getColor(resourseColor)`. – Dumbo Feb 22 '18 at 15:06
Could you show how I could adapt the `changeColor` method to use `changeColor(Color.parseColor("#00FF00"));` – Feb 22 '18 at 15:09
@zarrexx look there: https://www.dropbox.com/s/4w2kqnaak8149wx/answer_.txt?dl=0 – Dumbo Feb 22 '18 at 15:14
Thank you very much – Feb 22 '18 at 15:18

Dumbo · Answer 2 · 2018-02-22T14:45:53.007

4

You can do it by defining the custom theme for activity. First you need to create styles.xml file in res/values/ path.

styles.xml

<resources>
    <style name="MyCustomTheme" parent="Theme.AppCompat.Light">
        <item name="android:statusBarColor">@color/color_primary</item>
        <item name="android:actionBarStyle">@style/MyActionBar</item>
    </style>

    <style name="MyActionBar" parent="@android:style/Widget.Holo.Light.ActionBar">
        <item name="android:background">@color/color_primary</item>
    </style>
</resources>

Then in your AndroidManifest.xml write:

<activity 
       android:name=".MyActivity"
       android:theme="@style/MyCustomTheme"/>

Or in your activity:

setTheme(android.R.style.MyCustomTheme);

edited Feb 22 '18 at 14:45

answered Feb 22 '18 at 14:26

Dumbo

1,630
18
33

Needs to be done programmatically within the activity not the XML file – Feb 22 '18 at 14:29
You can use `setTheme(android.R.style.MyCustomTheme)` method after your `if()` statement. @zarrexx – Dumbo Feb 22 '18 at 14:33

How to change Action Bar and Status Bar color in activity?

2 Answers2

styles.xml