Android TextSwitcher



Android TextSwitcher




  1. Create TextSwitcher with Manual Controls and Conditions



Step 1 : Select File -> New -> Project -> Android Application Project (or) Android Project. Fill the forms and click "Finish" button. If you have any doubt regarding create a new project Click Here.

Step 2 : Open res -> layout -> activity_main.xml (or) main.xml and add following code :


<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#1E90FF" >
 
    <Button android:id="@+id/Add"
        android:textColor="#FFFFFF"
        android:layout_centerHorizontal="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="60dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Addition" />
 
    <Button android:id="@+id/Subtract"
        android:textColor="#FFFFFF"
        android:layout_centerHorizontal="true"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="60dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Subtraction" />
 
    <Button android:id="@+id/Multiple"
        android:textColor="#FFFFFF"
        android:layout_centerVertical="true"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="0dp"
        android:rotation="270"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Multiplication" />
 
    <Button android:id="@+id/Divide"
        android:textColor="#FFFFFF"
        android:layout_centerVertical="true"
        android:layout_alignParentRight="true"
        android:layout_marginRight="10dp"
        android:rotation="90"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Division" />
 
    <TextSwitcher android:id="@+id/switcher"
        android:textColor="#FFFFFF"    
        android:layout_centerInParent="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</RelativeLayout>


Step 3 : Open src -> package -> MainActivity.java and add following code :

package com.gudivada.hemanthsomaraju;

import android.app.Activity;
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 MainActivity extends Activity implements ViewSwitcher.ViewFactory,
        View.OnClickListener {

    TextSwitcher switcher;
    float counter = 0;
    Button Add, Subtract, Multiple, Divide;

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

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

        Animation in = AnimationUtils.loadAnimation(this, android.R.anim.fade_in);
        Animation out = AnimationUtils.loadAnimation(this, android.R.anim.fade_out);
     
        switcher.setInAnimation(in);
        switcher.setOutAnimation(out);
     
        Add = (Button) findViewById(R.id.Add);
        Subtract = (Button) findViewById(R.id.Subtract);
        Multiple = (Button) findViewById(R.id.Multiple);
        Divide = (Button) findViewById(R.id.Divide);
     
        Add.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub

counter++;
switcher.setText(String.valueOf(counter));
}
});
     
        Subtract.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub

counter--;
switcher.setText(String.valueOf(counter));
}
});
     
        Multiple.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub

counter = counter*2;
switcher.setText(String.valueOf(counter));
}
});
     
        Divide.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub

counter = counter/2;
switcher.setText(String.valueOf(counter));
}
});
    }

    public View makeView() {
        TextView t = new TextView(this);
        t.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL);
        t.setTextSize(36);
        return t;
    }

    public void onClick(View v) {
// TODO Auto-generated method stub
    }
}

Step 4 : Open AndroidManifest.xml and add following code :


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.gudivada.hemanthsomaraju"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.gudivada.hemanthsomaraju.MainActivity"
            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>

Step 5 : Our output will be like this :