TextSwitching animation in ANDROID or Using TextSwitcher Control in ANDROID

Hi all…..

Today I will show you how to do a simple and beautiful text animation while switching the text in a textView in android

The advantage is that you don’t need a seperate xml file for animation in this program, all is done inside the java code.

This is the main java file.

package pack.coderzheaven;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ViewSwitcher;

public class TextSwitcherDemo extends Activity implements ViewSwitcher.ViewFactory,
        View.OnClickListener {

    private TextSwitcher mSwitcher;

    private int mCounter = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        mSwitcher = (TextSwitcher) findViewById(R.id.switcher);
        mSwitcher.setFactory(this);

        Animation in = AnimationUtils.loadAnimation(this,  android.R.anim.fade_in);
        Animation out = AnimationUtils.loadAnimation(this, android.R.anim.fade_out);
        mSwitcher.setInAnimation(in);
        mSwitcher.setOutAnimation(out);

        Button nextButton = (Button) findViewById(R.id.next);
        nextButton.setOnClickListener(this);

        updateCounter();
    }

    public void onClick(View v) {
        mCounter++;
        updateCounter();
    }

    private void updateCounter() {
        mSwitcher.setText(String.valueOf(mCounter));
    }

    public View makeView() {
        TextView t = new TextView(this);
        t.setGravity(Gravity.CENTER | Gravity.CENTER_HORIZONTAL);
        t.setTextSize(70);
        t.setTextColor(Color.RED);
        return t;
    }
}

Here we use a widget called TextSwitcher in android.
Now the main.xml file.

<?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="fill_parent"
    android:orientation="vertical">

	<TextView android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello"
        android:textStyle="bold|italic"/>

    <Button android:id="@+id/next"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Switch"
        android:textStyle="bold|italic" />

    <TextSwitcher android:id="@+id/switcher"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

Strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">TextSwitcher Demo from CoderzHeaven</string>
    <string name="app_name">TextSwitcher Demo</string>
</resources>

AndroidManifest.xml file contents.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="pack.coderzheaven"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".TextSwitcherDemo"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

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