This example demonstrates How to launch another app from your app
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" xmlns:app = "https://schemas.android.com/apk/res-auto" xmlns:tools = "https://schemas.android.com/tools" android:layout_width = "match_parent" android:gravity = "center" android:layout_height = "match_parent" tools:context = ".MainActivity" android:orientation = "vertical"> <Button android:id = "@+id/applist" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:layout_alignParentTop = "true" android:layout_centerHorizontal = "true" android:layout_marginTop = "27dp" android:text = "Select app list"/> </LinearLayout>
In the above code, we have taken button view to open YouTube application.
Step 3 − Add the following code to src/MainActivity.java
package com.example.myapplication; import android.content.ActivityNotFoundException; import android.content.Intent; import android.content.pm.ResolveInfo; import android.content.res.Configuration; import android.graphics.PixelFormat; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.Gravity; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.WindowManager; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import java.util.List; import java.util.Locale; public class MainActivity extends AppCompatActivity { private WindowManager windowManager; private ImageView chatHead; WindowManager.LayoutParams params; @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViewById(R.id.applist).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent mIntent = getPackageManager().getLaunchIntentForPackage("com.google.android.youtube"); if (mIntent ! = null) { try { startActivity(mIntent); } catch (ActivityNotFoundException err) { Toast t = Toast.makeText(getApplicationContext(), "App is not found", Toast.LENGTH_SHORT); t.show(); } } } }); } }
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 Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –
Click on button it will open youtube app.