android activity doesn't recognize my import

Question

this question is related to this one. My activity can't implement lifecycleOwner I suppose this question may contains the answer of lifecycleOwner one. I find this answer AppCompatActivity not implementing LifecycleOwner but it didn't solve my problem

I'm doing an android project in android. In every activity, it just doesn't recognize my imports. like this:

private EditText edAccount;
edAccount = findViewById(R.id.edAccount);

it says: required: android.widget.EditText Found:android.view.View But I do imports android.widget.EditText. This happened after i import a new library module. But i don't know what's going on.

Also, the AppCompatActivity doesn't implement lifecycleOwner anymore.

Thank you for your answer

the build.gradle

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.example.finaldesigntest"
        minSdkVersion 16
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            debuggable true
        }
    }
    buildToolsVersion '27.0.3'
    productFlavors {
    }
}


repositories {
    flatDir {
        dirs 'libs'
    }
    mavenCentral()
}

repositories {
    flatDir { dirs project(':library').file('libs') }
//    maven { url 'https://jitpack.io' }
    maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
    mavenCentral()
}

allprojects {
    repositories {
        //jcenter()
        //maven { url 'https://maven.google.com' }
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation 'com.squareup.okhttp3:okhttp:3.10.0'
    implementation 'com.contrarywind:Android-PickerView:4.0.1'
    implementation 'com.android.support:support-annotations:27.1.1'
    implementation project(':library')
    compile 'io.reactivex.rxjava2:rxjava:2.1.6'
    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
    implementation 'android.arch.lifecycle:runtime:1.1.1'
    implementation 'android.arch.lifecycle:extensions:1.1.1'
    implementation 'android.arch.lifecycle:reactivestreams:1.1.1'
    annotationProcessor "android.arch.lifecycle:compiler:1.1.1"
}

this is activity's layout.xml

   <?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.example.finaldesigntest.LoginActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:textSize="18sp"
            android:text="Account: "/>
        <EditText
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:id="@+id/edAccount"
            android:layout_gravity="center_vertical"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:orientation="horizontal">
        <TextView
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:textSize="18sp"
            android:text="Password: "/>
        <EditText
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:id="@+id/edPassword"
            android:layout_gravity="center_vertical"
            android:inputType="textPassword"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/remember_pass"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="18sp"
            android:text="Remember password"/>
    </LinearLayout>

    <Button
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:id="@+id/login"
        android:text="Login"/>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/view_login_result"/>

</LinearLayout>

It doesn't happen in the first place. I want to know how to make it back to the old way. then I may solve my lifecycleOwner problem. Thx — Endrol, Apr 13 '18 at 12:08
Please expand the question with relevant .xml and build.gradle dependencies. — Gotiasits, Apr 13 '18 at 12:11
You probably have name coalison. I had a similar problem with multi-library projects. Rename .xml files to be unique in across all modules. Also I do not see `edAccount` in posted .xml — Gotiasits, Apr 13 '18 at 12:31
sorry, I got the wrong xml, now I changed it. But all my .xml names are unique. @Gotiasits — Endrol, Apr 13 '18 at 12:41

score 2 · Answer 1 · answered Apr 13 '18 at 11:58

2

Make sure you build your project successfully. it only happen when gradle build is not success.

answered Apr 13 '18 at 11:58

Prashant Jajal

3,469
5
24
38

4

shouldn't this be a comment? – Aswin P Ashok Apr 13 '18 at 11:58
It was a successful project until I import a module library. then this happen – Endrol Apr 13 '18 at 12:25
after adding your library in your project, is build success.? @xiLianPeng – Prashant Jajal Apr 13 '18 at 12:26
the issue happens after the import module so not success @PrashantJajal – Endrol Apr 13 '18 at 12:35
may be your imported module have some configuration error. can you please add some `Gradle Log` in question for better idea. – Prashant Jajal Apr 13 '18 at 12:38
the imported module is a ok. what's gradle log by the way. – Endrol Apr 13 '18 at 12:56

score 0 · Answer 2 · answered Apr 13 '18 at 12:44

0

You need to cast it like this:

 private EditText edAccount;
 edAccount = (EditText) findViewById(R.id.edAccount);

answered Apr 13 '18 at 12:44

D. O.

109
2
9

I know it works, but i wanna know why it suddenly went wrong. I hope to know the reason to solve this one. https://stackoverflow.com/q/49812582/9608562 – Endrol Apr 13 '18 at 12:54

android activity doesn't recognize my import

2 Answers2