Question

我的AndroidManifest.xml文件如下

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     package="com.example.varianttecnology.uberclone">

<!--
     The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
     Google Maps Android API v2, but you must specify either coarse or fine
     location permissions for the 'MyLocation' functionality. 
-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <!--
         The API key for Google Maps-based APIs is defined as a string resource.
         (See the file "res/values/google_maps_api.xml").
         Note that the API key is linked to the encryption key used to sign the APK.
         You need a different API key for each encryption key, including the release key that is used to
         sign the APK for publishing.
         You can define the keys for the debug and release targets in src/debug/ and src/release/. 
    -->
    <meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="@string/google_maps_key" />

    <activity
        android:name=".Welcome"
        android:label="@string/title_activity_welcome"></activity>
</application>

我正在使用build.gradle版本

buildscript {

repositories {
    google()
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.3.1'
    classpath 'com.google.gms:google-services:4.1.0'


    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
    }
  }

allprojects {
  repositories {
    google()
    jcenter()
    maven {
        url 'https://maven.google.com'
    }
    maven {
        url "http://dl.bintray.com/glomadrian/maven"
      }
   }
}

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

build.gradle（APP）文件如下所示

apply plugin: 'com.android.application'

android {
     compileSdkVersion 28
     defaultConfig {
        applicationId "com.example.varianttecnology.uberclone"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

packagingOptions {
    exclude 'META-INF/services/javax.annotation.processing.Processor'
}

lintOptions {
    disable 'InvalidPackage'
   }
 }

dependencies {
   implementation fileTree(dir: 'libs', include: ['*.jar'])
   implementation 'com.android.support:appcompat-v7:28.0.0'
   implementation 'com.android.support.constraint:constraint-layout:1.1.3'
   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'

//Add libraries
implementation 'com.google.firebase:firebase-core:16.0.7'
implementation 'com.google.firebase:firebase-database:16.0.6'
implementation 'com.google.firebase:firebase-auth:16.1.0'

implementation 'com.android.support:design:28.0.0'
implementation 'com.rengwuxian.materialedittext:library:2.1.4'
implementation 'uk.co.chrisjenx:calligraphy:2.3.0'

implementation 'com.android.support:support-v4:28.0.0'
implementation 'com.github.d-max:spots-dialog:1.1@aar'
implementation 'com.android.support:support-media-compat:28.0.0'

implementation 'com.google.android.gms:play-services-maps:16.0.0'
implementation 'com.google.android.gms:play-services-location:16.0.0'
implementation 'com.android.support:cardview-v7:28.0.0'
implementation 'com.google.android.gms:play-services-base:16.1.0'
implementation 'com.google.android.gms:play-services:16.1.0'

implementation 'com.firebase:geofire-android:2.1.2'
implementation 'com.android.support:mediarouter-v7:28.0.0'
implementation 'com.github.glomadrian:MaterialAnimatedSwitch:1.1@aar'
}
apply plugin: 'com.google.gms.google-services'

但是它总是在AndroidManifest.xml文件中显示此警告，如何解决此警告？

E:\Andriod\EdmtDev\Uber 
Clone\UberClone\app\src\main\AndroidManifest.xml:24:9-31:50 Warning:
activity#com.google.firebase.auth.internal.FederatedSignInActivity@android:l 
aunchMode was tagged at AndroidManifest.xml:24 to replace other declarations 
but no other declaration present

问题：

这个新标签是AS 3.2.1中的新功能吗？还是因为AS 3.2.1查找到新的警告（以前的版本没有警告）而显示？
这是关于什么警告？
我该如何解决？

Answer 1

可以通过合并多个清单文件的权限来解决此问题

<uses-permission tools:node="merge" android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission tools:node="merge" android:name="android.permission.ACCESS_COARSE_LOCATION" />

Answer 2

请尝试在AndroidManifest.xml中输入此代码。

#include <iostream>

constexpr static size_t N = 10;

int main()
{  
    int* A = new int[N];

    /* fill array A */

    int sum(0), k(0), S(0);
    for (size_t i = 0; i < N; ++i)
    {
        S += A[i];
        if (A[i] % 2 == 0)
        {
            ++k;
            sum += A[i];
            if (i == 0) // nothing before index 0
                A[i] = 0;
            else
                A[i] = S - A[i]; // here's the trick
        } 
    }

    delete[] A; // don't forget this!

    return 0;
}

替换其他声明，但没有其他声明吗？

2 个答案: