ui test for switching activities

app/build.gradle

@@ -1,12 +1,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 31
-    buildToolsVersion "30.0.1"
+    compileSdkVersion 28
+    buildToolsVersion "28.0.3"
     defaultConfig {
         applicationId "com.example.simpleparadox.listycity"
-        minSdkVersion 15
-        targetSdkVersion 31
+        minSdkVersion 16
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -21,7 +21,6 @@ android {
         sourceCompatibility = 1.8
         targetCompatibility = 1.8
     }
-
     packagingOptions {
         exclude 'META-INF/LICENSE.md'
         exclude 'META-INF/DEPENDENCIES'
@@ -40,10 +39,12 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'com.google.android.material:material:1.3.0'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test:runner:1.2.0'
     androidTestImplementation 'androidx.test:rules:1.2.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+
     androidTestImplementation 'com.jayway.android.robotium:robotium-solo:5.3.1'
 }

app/src/androidTest/java/com/example/simpleparadox/listycity/MainActivityTest.java

@@ -91,6 +91,15 @@ public void checkCiyListItem(){
         assertEquals("Edmonton", city);
     }
 
+    /**
+     * switching between activities
+     */
+    @Test
+    public void switchactivities(){
+        solo.clickOnButton("Show Activity");
+        solo.clickOnButton("Main Activity");
+    }
+
     /**
      * Close activity after each test
      * @throws Exception

app/src/main/AndroidManifest.xml

@@ -9,6 +9,9 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+        <activity
+            android:name=".ShowActivity"
+            android:exported="false" />
         <activity android:name=".MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/com/example/simpleparadox/listycity/MainActivity.java

@@ -2,6 +2,7 @@
 
 import androidx.appcompat.app.AppCompatActivity;
 
+import android.content.Intent;
 import android.os.Bundle;
 import android.util.Log;
 import android.util.SparseBooleanArray;
@@ -71,6 +72,14 @@ public void onClick(View v) {
             }
         });
 
+        final Button showact = findViewById(R.id.gotoshowactivity);
+        showact.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                Intent intent = new Intent(MainActivity.this, ShowActivity.class);
+                startActivity(intent);
+            }
+        });
+
     }
 
 

app/src/main/java/com/example/simpleparadox/listycity/ShowActivity.java

@@ -0,0 +1,25 @@
+package com.example.simpleparadox.listycity;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+
+public class ShowActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_show);
+
+        final Button mainact = findViewById(R.id.gotomainactivity);
+        mainact.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                Intent intent = new Intent(ShowActivity.this, MainActivity.class);
+                startActivity(intent);
+            }
+        });
+    }
+}

app/src/main/res/layout/activity_main.xml

@@ -5,13 +5,17 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
-    tools:context=".MainActivity">
+    tools:context=".MainActivity"
+    android:layout_margin="10dp">
 
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="horizontal">
-
+        android:orientation="vertical">
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
         <Button
             android:id="@+id/button_add"
             android:layout_width="180dp"
@@ -23,6 +27,13 @@
             android:layout_width="180dp"
             android:layout_height="wrap_content"
             android:text="ClEAR ALL" />
+        </LinearLayout>
+
+        <Button
+            android:id="@+id/gotoshowactivity"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Show Activity" />
     </LinearLayout>
 
     <ListView

app/src/main/res/layout/activity_show.xml

@@ -0,0 +1,15 @@
+<?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"
+    tools:context=".ShowActivity">
+    <Button
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:id="@+id/gotomainactivity"
+        android:text="Main Activity"></Button>
+
+</LinearLayout>