Flutter: keyboard not showing up with Textfield on Android

Question

As already mentioned in the title my keyboard does not show up when i click on TextField-Widgets. That is the same for every TextField across my application, but wasn't like that always. Unfortunately i don't use version control so I can't find out what's the error causing it.

I don't think it's some error in the code, my flutter doctor is fine also. I'll put my pubspec.yaml aswell as my build.gradle files, since I changed some of the stuff in them, maybe that helps. I'll also put one example of a textfield.

It happens on both Android devices I've tested, which are both on Android 9.0. I tried it on emulator with 8.1 Oreo and the keyboard seems to work on there.

one of my usage cases:

SliverList(
  delegate: SliverChildListDelegate([
    ListTile(
      leading: Icon(Icons.call_to_action),
      title: TextField(
        decoration: InputDecoration(
            labelText: "Name", border: InputBorder.none),
      ),
    ),
  ]),

pubspec.yaml :

name: whatever
description: A new Flutter application.

dependencies:
  flutter:
    sdk: flutter

  google_sign_in: ^3.2.1

  googleapis: ^0.52.0

  googleapis_auth: ^0.2.5+2

  sqflite: ^0.12.2+1

  firebase_core: ^0.2.5+1

  firebase_database: ^1.0.5

  barcode_scan: ^0.0.7

  numberpicker: ^0.1.7

  flutter_speed_dial: ^1.0.8

  image_picker: ^0.4.10

  chewie: ^0.8.0

  sticky_headers: ^0.1.7

dev_dependencies:
  flutter_test:
    sdk: flutter

flutter:
  uses-material-design: true

  assets:
      - assets/

  fonts:
    - family: Circular
      fonts:
        - asset: fonts/circular-regular.ttf
        - asset: fonts/circular-bold.ttf
          weight: 700

App-Level build.gradle :

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

apply plugin: 'com.android.application'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 28

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.whatever"
        minSdkVersion 16
        targetSdkVersion 28
        multiDexEnabled true
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.google.firebase:firebase-core:16.0.4'
    implementation 'com.android.support:multidex:1.0.3'
}

apply plugin: 'com.google.gms.google-services'

Project-Level build.gradle :

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
        classpath 'com.google.gms:google-services:4.1.0'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Answer 1

Removing enableFlutterDriverExtension() from my void main() method, as noted here in Github solved this for me. I'm still running against API 28 (no need to downgrade to 27)

Answer 2

Targeting API 28 seems to have some problems with showing keyboard on physical devices providing some links hope they help with your problem

Github Flutter and API 28

Physical devices keyboard not popping up

Answer 3

将我的targetSdkVersion更改为27可解决我的问题... nonono