How to make the textview blinking

Question

Guys i have a textview which i need it to be blinking please help me with it.

Answer 1

Edited

It is a deprecated answer to Android before version 3.0 honeycomb, please uses SolArabehety's answer or look at this thread.

The only reason I keep this answer is to historical reasons before android 3.0 Android animations had a lot of problems, this "bad" solution work at that time, nowadays it is unthinkable to use it, so just go for an animation solution, don't use this code.

Original Answer

package teste.blink;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.TextView;

public class TesteBlinkActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        blink();
}

private void blink(){
    final Handler handler = new Handler();
    new Thread(new Runnable() {
        @Override
        public void run() {
        int timeToBlink = 1000;    //in milissegunds
        try{Thread.sleep(timeToBlink);}catch (Exception e) {}
            handler.post(new Runnable() {
                @Override
                    public void run() {
                    TextView txt = (TextView) findViewById(R.id.usage);
                    if(txt.getVisibility() == View.VISIBLE){
                        txt.setVisibility(View.INVISIBLE);
                    }else{
                        txt.setVisibility(View.VISIBLE);
                    }
                    blink();
                }
                });
            }
        }).start();
    }

---

<TextView 
   android:id="@+id/usage"
   android:layout_marginTop="220dip"
   android:layout_marginLeft="45dip"
   android:layout_marginRight="15dip"
   android:typeface="serif"            
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="Google "
   android:textColor="#030900"/>

Answer 2

public final class BlinkEffectUtils {

    private static BlinkEffectUtils blinkEffect;

    public enum PROPERTY_TYPE {
        BACKGROUND_COLOR,
        TEXT_COLOR
    }

    private BlinkEffectUtils() {
    }

    public static BlinkEffectUtils getInstance(Context context) {
        if (blinkEffect == null) {
            blinkEffect = new BlinkEffectUtils();
        }

        return blinkEffect;
    }

    public void setBlinkEffect(Object targetView, PROPERTY_TYPE property_type, int duration, int defaultColor, int effectColor) {
        String propertyName = "";

        switch (property_type) {

            case TEXT_COLOR:
                propertyName = "textColor";
                break;

            case BACKGROUND_COLOR:
                propertyName = "backgroundColor";
                break;
        }

        @SuppressLint("ObjectAnimatorBinding")
        ObjectAnimator anim = ObjectAnimator.ofInt(targetView, propertyName,
                effectColor,
                defaultColor);
        anim.setDuration(duration);
        anim.setEvaluator(new ArgbEvaluator());
        anim.setRepeatMode(ValueAnimator.REVERSE);
        anim.setRepeatCount(ValueAnimator.INFINITE);
        anim.start();

    }

}

Answer 3

You can use this:

TextView myText = (TextView) findViewById(R.id.myText );

Animation anim = new AlphaAnimation(0.0f, 1.0f);
anim.setDuration(50); //You can manage the blinking time with this parameter
anim.setStartOffset(20);
anim.setRepeatMode(Animation.REVERSE);
anim.setRepeatCount(Animation.INFINITE);
myText.startAnimation(anim);

It's the same answer I gave in this post Blinking Text in android view

Hope this helps!

Answer 4

private fun blink() {
        val handler = Handler()
        Thread(Runnable {
            val timeToBlink = 500    //in milissegunds
            try {
                Thread.sleep(timeToBlink.toLong())
            } catch (e: Exception) {
            }

            handler.post(Runnable {

                if (usage.visibility == View.VISIBLE) {
                    usage.visibility = View.INVISIBLE
                } else {
                    usage.visibility = View.VISIBLE
                }
                blink()
            })
        }).start()
    }

Answer 5

Create an AlphaAnimation and apply it to the textview in the activity where you setup the textview. The blinking would be accomplished by repeating an animation from 1.0 alpha to 0.0 alpha to 1.0 alpha.

---

Edit: Google provideth.

Answer 6

Courtesy to the top answer, this is what i did:

 textBlink = new TimerTask() {
        int countdown = 10;

        @Override
        public void run() {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    if (countdown <= 0) {
                        timer.cancel();
                        textview.setVisibility(View.GONE);
                    } else {
                            textview.setVisibility(textview.getVisibility() == View.VISIBLE?View.GONE:View.VISIBLE);
                        countdown--;
                    }
                }
            });
        }
    };

then somewhere on the code:

  timer = new Timer();
  timer.scheduleAtFixedRate(textBlink,0,500);

This will do a blink effect for 5 seconds. Recommended for if you don't want the fadeIn-fadeOut effect.