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How to check the amount of RAM to be used by an Android App using Kotlin?
This example demonstrates how to create a smooth image rotation in Android using Kotlin.
Step 1 − Create a new project in Android Studio, go to File? New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
Example
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="8dp" tools:context=".MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_marginTop="50dp" android:text="Tutorials Point" android:textAlignment="center" android:textColor="@android:color/holo_green_dark" android:textSize="32sp" android:textStyle="bold" /> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:textColor="@android:color/background_dark" android:textSize="24sp" android:textStyle="bold" /> </RelativeLayout>
Step 3 − Add the following code to src/MainActivity.kt
Example
import android.app.ActivityManager
import android.content.Context
import android.os.Bundle
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
private lateinit var textView: TextView
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
title = "KotlinApp"
textView = findViewById(R.id.textView)
textView.text = getMemoryInfo()
}
private fun getMemoryInfo(): CharSequence? {
val memoryInfo = ActivityManager.MemoryInfo()
val activityManager = getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
activityManager.getMemoryInfo(memoryInfo)
val runtime = Runtime.getRuntime()
val builder = StringBuilder()
builder.append("Available Memory: ").append(memoryInfo.availMem).append("\
n").append("Total Memory: ").append(memoryInfo.totalMem).append("
").append("Runtime
Maximum Memory: ").append(runtime.maxMemory()).append("
").append("Runtime Total Memory:
").append(runtime.totalMemory()).append("
").append("Runtime Free Memory:
").append(runtime.freeMemory()).append("
")
return builder.toString()
}
}Step 4 − Add the following code to androidManifest.xml
Example
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.myapplication"> <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>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run icon
from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen
Updated on: 23-May-2020
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