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:orientation="vertical"
android:padding="10dp"
tools:context="com.example.malik.blog.MainActivity">
<Button
android:id="@+id/buttonOne"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Button One" />
<Button
android:id="@+id/buttonTwo"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Button Two" />
<Button
android:id="@+id/buttonThree"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Button Three" />
<Button
android:id="@+id/buttonFour"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Button Four" />
</LinearLayout>
MainActivity.java
package com.example.malik.blog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
Button one, two, three, four;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myMethod();
}
public void myMethod() {
one = (Button) findViewById(R.id.buttonOne);
two = (Button) findViewById(R.id.buttonTwo);
three = (Button) findViewById(R.id.buttonThree);
four = (Button) findViewById(R.id.buttonFour);
one.setOnClickListener(this);
two.setOnClickListener(this);
three.setOnClickListener(this);
four.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.buttonOne:
Toast.makeText(getApplicationContext(), "Button One", Toast.LENGTH_LONG).show();
break;
case R.id.buttonTwo:
Toast.makeText(getApplicationContext(), "Button Two", Toast.LENGTH_LONG).show();
break;
case R.id.buttonThree:
Toast.makeText(getApplicationContext(), "Button Three", Toast.LENGTH_LONG).show();
break;
case R.id.buttonFour:
Toast.makeText(getApplicationContext(), "Button Four", Toast.LENGTH_LONG).show();
break;
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.malik.blog">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
build.gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.example.malik.blog"
minSdkVersion 18
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
testCompile 'junit:junit:4.12'
}
