This example demonstrates about Detect home button press in android
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.
<?xml version = "1.0" encoding = "utf-8"?> <LinearLayout xmlns:android = "https://schemas.android.com/apk/res/android" android:orientation = "vertical" android:layout_width = "match_parent" android:gravity = "center" android:layout_height = "match_parent"> <TextView android:id = "@+id/text" android:layout_width = "fill_parent" android:gravity = "center" android:textSize = "30sp" android:layout_height = "wrap_content" android:text = "Click here" /> </LinearLayout>
In the above code, we have taken a text view.
Step 3 − Add the following code to src/MainActivity.java
package com.example.myapplication; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity { TextView text; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); text = findViewById(R.id.text); text.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { onUserLeaveHint(); } }); } @Override protected void onUserLeaveHint() { text.setText("Home buton pressed"); Toast.makeText(MainActivity.this,"Home buton pressed",Toast.LENGTH_LONG).show(); super.onUserLeaveHint(); } }
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 the android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –
Now click on home button, it will show the result as follows