Android Linearlayout Gradient Background

Android LinearLayout Gradient Background

Ok I have managed to solve this using a selector. See code below:

main_header.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="50dip"
    android:orientation="horizontal"
    android:background="@drawable/main_header_selector">
</LinearLayout>

main_header_selector.xml:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
    <shape>
        <gradient
            android:angle="90"
            android:startColor="#FFFF0000"
            android:endColor="#FF00FF00"
            android:type="linear" />
    </shape>
</item>
</selector>

Hopefully this helps someone who has the same problem.

How to make gradient background in android

You can create this 'half-gradient' look by using an xml Layer-List to combine the top and bottom 'bands' into one file. Each band is an xml shape.

See this previous answer on SO for a detailed tutorial: Multi-gradient shapes.

adding color gradient between 2 linear layouts

Try this:

Gradient drawable :

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
    android:startColor="#5b5cb8df"
    android:centerColor="#c501a0e4"
    android:endColor="#009FE3"
    android:angle="270"/>
</shape>

In xml use like :

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_login"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/company_bg"
        android:orientation="vertical" />

     <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="@drawable/background_blur" />

</RelativeLayout>

How to make a gradient background for a LinearLayout?

Besides xml you can also use GradientDrawable it has corresponding methods for all xml attributes

Android linear layout with gradient transparency background

Since you are manipulating Bitmap to generate the blurred image, you can use a LinearGradient shader to add transparency to it as in this answer.

public Bitmap addGradient(Bitmap src) {
    int w = src.getWidth();
    int h = src.getHeight();
    Bitmap overlay = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(overlay);

    canvas.drawBitmap(src, 0, 0, null);

    Paint paint = new Paint();
    LinearGradient shader = new LinearGradient(0, 0, 0, h, 0xFFFFFFFF, 0x00FFFFFF, Shader.TileMode.REPEAT);
    paint.setShader(shader);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
    canvas.drawRect(0, h - h, w, h, paint);

    return overlay;
}

How to create android layout gradient background from middle to bottom of the screen?

Use android:centerColor in your my_bg.xml

Set the background colour of a Layout view to a gradient in Android?

create gradient.xml in /res/drawable:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <gradient
        android:startColor="#FFFFFF"
        android:endColor="#00000000"
        android:angle="45"/>    
</shape>

and in your main.xml layout file in /res/layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/gradient"
    >   
</LinearLayout>

you can specify the angle by replacing the android:angle value and start/end colour by replacing android:startColor and android:endColor

How do I programmatically set the background color gradient on a Custom Title Bar?

To do this in code, you create a GradientDrawable.

The only chance to set the angle and color is in the constructor.
If you want to change the color or angle, just create a new GradientDrawable and set it as the background

    View layout = findViewById(R.id.mainlayout);

    GradientDrawable gd = new GradientDrawable(
            GradientDrawable.Orientation.TOP_BOTTOM,
            new int[] {0xFF616261,0xFF131313});
    gd.setCornerRadius(0f);

    layout.setBackgroundDrawable(gd);

For this to work, I added an id to your main LinearLayout as follows

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/mainlayout"
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
<ImageView   
              android:layout_width="fill_parent"
              android:layout_height="wrap_content"
              android:src="@drawable/title_bar_logo"
              android:gravity="center_horizontal"
              android:paddingTop="0dip"/>

</LinearLayout>

And to use this as for a custom title bar

    getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.custom_title_bar);
    View title = getWindow().findViewById(R.id.mainlayout);
    title.setBackgroundDrawable(gd);

Gradient shape blending position in LinearLayout

Try this:

<?xml version="1.0" encoding="utf-8" ?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient
        android:startColor="#ffffff"  
        android:centerColor="#ffffff"        
        android:endColor="#ff0000"
        android:angle="270"
     />        
</shape>

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