Example of implicit Android Intent, open a URL, send an email
2. Simple example with the implicit intent
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This simple example, when you click a Button which requires to see website by URL, you create an implicitly Intent, Intent sent to the Android system to decide which components will be opened, maybe in your equipment installs many different browsers (Firefox, Chrome, ..), the device will open it in your default browser or your preferred browser
In addition examples also include:
- Send an email
Note: The Android system will try to find its best application to send email. On the emulator, there may not be a good emailing application.
Create Android project with name "ImplicitIntentExample".
- Name: ImplicitIntentExample
- Package name: org.o7planning.implicitintentexample
The interface of the application:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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=".MainActivity">
<Button
android:id="@+id/button_openURL"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="38dp"
android:text="Open Google.com"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button_sendEmail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="42dp"
android:text="Send Email"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button_openURL" />
</androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.java
package org.o7planning.implicitintentexample;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Intent;
import android.net.Uri;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
private Button buttonOpenURL;
private Button buttonSendEmail;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.buttonOpenURL = (Button) this.findViewById(R.id.button_openURL);
this.buttonSendEmail = (Button) this.findViewById(R.id.button_sendEmail);
this.buttonOpenURL.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openURL();
}
});
this.buttonSendEmail.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendEmail();
}
});
}
// The method is called when the user clicks on "Open google.com" button.
public void openURL( ) {
String url="https://google.com";
// An implicit intent, request a URL.
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
this.startActivity(intent);
}
// The method is called when the user clicks on "Send Email" button.
public void sendEmail( ) {
// List of recipients
String[] recipients=new String[]{"friendemail@gmail.com"};
String subject="Hi, how are you!";
String content ="This is my test email";
Intent intentEmail = new Intent(Intent.ACTION_SEND, Uri.parse("mailto:"));
intentEmail.putExtra(Intent.EXTRA_EMAIL, recipients);
intentEmail.putExtra(Intent.EXTRA_SUBJECT, subject);
intentEmail.putExtra(Intent.EXTRA_TEXT, content);
intentEmail.setType("text/plain");
startActivity(Intent.createChooser(intentEmail, "Choose an email client from..."));
}
}
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