All Projects → drydart → Flutter_android

drydart / Flutter_android

Licence: unlicense
Android bindings plugin for Flutter.

Programming Languages

dart
5743 projects

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Flutter Android Bindings

Project license Dart compatibility Pub package Dartdoc reference

This is a Flutter plugin for using Android's numerous platform-specific APIs in Flutter apps.

Screenshot

Screenshot of Android settings

Prerequisites

Compatibility

Android only.

Installation

dependencies:
  flutter_android: ^0.8.0

Features

  • Implements bindings to a growing set of Android's platform-specific APIs.

  • Reduces duplication of effort by centralizing Android bindings in a single package.

Feature Table

Feature Flutter API
Activity launch android_content.Intent#startActivity()
Bluetooth scanning android_bluetooth.BluetoothLeScanner
Distance calculation android_location.Location.distanceBetween()
Face detection android_media.FaceDetector
Heart-rate monitoring android_hardware.SensorManager.getDefaultSensor()
Parcel serialization android_os.Parcel
Sensor event streams android_hardware.Sensor#subscribe()

TODO: dirs

Examples

Activity launch

import 'package:flutter_android/android_content.dart' show Intent;

await Intent(
  action: "android.intent.action.VIEW", // Intent.ACTION_VIEW
  data: Uri.parse("https://flutter.dev"),
).startActivity();

Parcel serialization

import 'package:flutter_android/android_os.dart' show Parcel;

var parcel = Parcel.obtain()
  ..writeBoolean(true)
  ..writeInt(42)
  ..writeDouble(3.1415)
  ..writeString("Hello, world!")
  ..writeList(<Object>[1, 2, 3])
  ..writeMap(<String, Object>{"a": 1, "b": 2, "c": 3});

await _channel.invokeMethod('someJavaMethod', parcel.asUint8List());

// In Java, your MethodCallHandler's call.arguments contains the marshaled Parcel

Face detection

import 'package:flutter_android/android_graphics.dart' show Bitmap;
import 'package:flutter_android/android_media.dart' show Face, FaceDetector;

var photo = Image.asset("images/einstein.png");

var bitmap = Bitmap.fromAssetImage(photo.image as AssetImage);
var detector = FaceDetector(width: 280, height: 396);

for (var face in await detector.findFaces(bitmap)) {
  if (face.confidence < Face.CONFIDENCE_THRESHOLD) {
    continue; // skip dubious results below the cut-off threshold
  }
  print("Found a face at (${face.midPoint.x}, ${face.midPoint.y}) with confidence ${face.confidence}");
}

Heart-rate monitoring

import 'package:flutter_android/android_hardware.dart'
    show Sensor, SensorEvent, SensorManager;

var sensor = await SensorManager.getDefaultSensor(Sensor.TYPE_HEART_RATE);

var events = await sensor.subscribe();
events.listen((SensorEvent event) {
  print(event.values[0]);
});

Frequently Asked Questions

TODO

Caveats

  • iOS is not and cannot be supported. All flutter_android APIs throw an AssertionError if they are invoked when running on iOS. For cross-platform apps, we recommend that you depend on the platform package to conditionalize your use of Android APIs.

Reference

android

import 'package:flutter_android/android.dart' as android;

android_app

import 'package:flutter_android/android_app.dart' as android_app;

android_bluetooth

import 'package:flutter_android/android_bluetooth.dart' as android_bluetooth;

android_content

import 'package:flutter_android/android_content.dart' as android_content;

android_database

import 'package:flutter_android/android_database.dart' as android_database;

android_graphics

import 'package:flutter_android/android_graphics.dart' as android_graphics;

android_hardware

import 'package:flutter_android/android_hardware.dart' as android_hardware;

android_location

import 'package:flutter_android/android_location.dart' as android_location;

android_media

import 'package:flutter_android/android_media.dart' as android_media;

android_os

import 'package:flutter_android/android_os.dart' as android_os;

Cross-Reference

Android Flutter
android.app android_app
android.app.Activity android_app.Activity
android.app.ActivityManager android_app.ActivityManager
android.app.AlarmManager android_app.AlarmManager
android.app.AuthenticationRequiredException android_app.AuthenticationRequiredException
android.app.DownloadManager android_app.DownloadManager
android.app.KeyguardManager android_app.KeyguardManager
android.app.Notification android_app.Notification
android.app.Notification.Action android_app.NotificationAction
android.app.Notification.Builder android_app.NotificationBuilder
android.app.NotificationManager android_app.NotificationManager
android.app.PendingIntent android_app.PendingIntent
android.app.SearchManager android_app.SearchManager
android.app.WallpaperColors android_app.WallpaperColors
android.app.WallpaperInfo android_app.WallpaperInfo
android.app.WallpaperManager android_app.WallpaperManager
android.bluetooth android_bluetooth
android.bluetooth.BluetoothAdapter android_bluetooth.BluetoothAdapter
android.bluetooth.BluetoothDevice android_bluetooth.BluetoothDevice
android.bluetooth.BluetoothHeadset android_bluetooth.BluetoothHeadset
android.bluetooth.BluetoothManager android_bluetooth.BluetoothManager
android.bluetooth.le.BluetoothLeScanner android_bluetooth.BluetoothLeScanner
android.bluetooth.le android_bluetooth
android.content android_content
android.content.ActivityNotFoundException android_content.ActivityNotFoundException
android.content.ComponentName android_content.ComponentName
android.content.ContentValues android_content.ContentValues
android.content.Context android_content.Context
android.content.Intent android_content.Intent
android.content.IntentFilter android_content.IntentFilter
android.content.SharedPreferences android_content.SharedPreferences
android.database android_database
android.database.Cursor android_database.Cursor
android.database.CursorIndexOutOfBoundsException android_database.CursorIndexOutOfBoundsException
android.database.DatabaseUtils android_database.DatabaseUtils
android.database.MatrixCursor android_database.MatrixCursor
android.database.SQLException android_database.SQLException
android.graphics android_graphics
android.graphics.Bitmap android_graphics.Bitmap
android.graphics.Color dart-ui.Color
android.graphics.Point android_graphics.Point
android.graphics.PointF android_graphics.PointF
android.graphics.drawable.Icon flutter.Icon
android.hardware android_hardware
android.hardware.Sensor android_hardware.Sensor
android.hardware.SensorEvent android_hardware.SensorEvent
android.hardware.SensorEventListener android_hardware.SensorEventListener
android.hardware.SensorManager android_hardware.SensorManager
android.location android_location
android.location.Location android_location.Location
android.media android_media
android.media.FaceDetector android_media.FaceDetector
android.media.FaceDetector.Face android_media.Face
android.net android_net
android.nfc android_nfc
android.os android_os
android.os.BatteryManager android_os.BatteryManager
android.os.Build android_os.Build
android.os.Bundle android_os.Bundle
android.os.Environment android_os.Environment
android.os.HardwarePropertiesManager android_os.HardwarePropertiesManager
android.os.Parcel android_os.Parcel
android.os.Parcelable android_os.Parcelable
android.os.PowerManager android_os.PowerManager
android.os.Process android_os.Process
android.os.StatFs android_os.StatFs
android.os.SystemClock android_os.SystemClock
android.os.UserManager android_os.UserManager
android.os.VibrationEffect android_os.VibrationEffect
android.os.Vibrator android_os.Vibrator
android.provider android_provider
android.security android_security
android.speech android_speech
android.telephony android_telephony
android.view android_view
java.util.Locale dart-ui.Locale

See Also

  • The win32 package provides bindings to the most common Win32 APIs.
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