How to create Animated Background Gradient ?
OutPut :
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/linearlayout1"
android:layout_gravity="center"
android:gravity="center"
android:background="@drawable/gradient_animation"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Background Gradients!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:textSize="40sp"
android:layout_gravity="center"
android:gravity="center"
/>
</LinearLayout>
Then After Creating this activity_main.xml file you have to create Four Different Gradients designs of differrent colors.
GO TO res > drawable > and create new drawable resource file.
gradient_one.xml
<?xml version = "1.0" encoding = "utf-8"?>
<shape xmlns:android = "http://schemas.android.com/apk/res/android">
<gradient
android:angle = "135"
android:endColor = "#FFC400"
android:startColor = "#FF6F00" />
</shape>
gradient_two.xml
<?xml version = "1.0" encoding = "utf-8"?>
<shape xmlns:android = "http://schemas.android.com/apk/res/android">
<gradient
android:angle = "0"
android:endColor = "#00E676"
android:startColor = "#1B5E20"/>
</shape>
gradient_three.xml
<?xml version = "1.0" encoding = "utf-8"?>
<shape xmlns:android = "http://schemas.android.com/apk/res/android">
<gradient
android:angle = "45"
android:endColor = "#FF1744"
android:startColor = "#B71C1C" />
</shape>
gradient_four.xml
<?xml version = "1.0" encoding = "utf-8"?>
<shape xmlns:android = "http://schemas.android.com/apk/res/android">
<gradient
android:angle = "90"
android:endColor = "#D500F9"
android:startColor = "#4A148C" />
</shape>
After creating these four gradients xml files then you have to create one more drawable.xml file
gradient_animation.xml
<?xml version = "1.0" encoding = "utf-8"?>
<animation-list xmlns:android = "http://schemas.android.com/apk/res/android">
<item
android:drawable = "@drawable/gradients"
android:duration = "3000" />
<item
android:drawable = "@drawable/gradient_two"
android:duration = "3000" />
<item
android:drawable = "@drawable/gradient_three"
android:duration = "3000" />
<item
android:drawable = "@drawable/gradient_four"
android:duration = "3000" />
</animation-list>
At Last let's work on MainActivity.java
MainActivity.java
public class MainActivity extends AppCompatActivity {
private LinearLayout mLinearLayout;
private AnimationDrawable animationDrawable;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mLinearLayout = (LinearLayout) findViewById(R.id.linearlayout1);
animationDrawable = (AnimationDrawable) mLinearLayout.getBackground();
animationDrawable.setEnterFadeDuration(3000);
animationDrawable.setExitFadeDuration(2000);
}
@Override
protected void onPostResume() {
super.onPostResume();
if (animationDrawable != null && !animationDrawable.isRunning()){
animationDrawable.start();
}
}
@Override
protected void onPause () {
super.onPause();
if (animationDrawable != null && animationDrawable.isRunning()){
animationDrawable.stop();
}
}
}
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