Monday, 21 January 2019

How to Make Blinking Animation in Android




1) anim/blinkinh_animation.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">

    <alpha
        android:duration="400"
        android:fromAlpha="0.0"
        android:interpolator="@android:anim/accelerate_interpolator"
        android:repeatCount="infinite"
        android:repeatMode="reverse"
        android:toAlpha="1.0" />


</set>

2) MainActivity.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:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Android Blinking Animation"
        android:textSize="22sp"
        android:textStyle="bold"
        android:textAlignment="center"/>

    <Button
        android:id="@+id/blinking_animation"
        android:layout_width="wrap_content"
        android:layout_height="100dp"
        android:layout_marginTop="16dp"
        android:text="Blinking Animation"
        android:layout_gravity="center"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:id="@+id/start"
        android:text="Start" />

</LinearLayout>

3) MainActivity.java

public class MainActivity extends AppCompatActivity {

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

        start = (Button) findViewById(R.id.start);
        button = (Button) findViewById(R.id.blinking_animation);

        start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(start.getText().toString().matches("Start")){
                    startBlinkingAnimation();
                    start.setText("Stop");
                } else {
                    button.setAnimation(null);
                    start.setText("Start");
                }
            }
        });
    }
    public void startBlinkingAnimation() {
        Animation startAnimation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.blinking_animation);
        button.startAnimation(startAnimation);
    }

}

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