Android Studio 无法识别 AndroidManifest 中的使用权限

Question

我遇到问题，我的 Android Studio 似乎无法识别 AndroidManifest.xml 文件中的使用权限。在我的主要活动中，当我尝试调用某些需要 INTERNET 和 ACCESS_NETWORK_STATE 的功能时，该活动似乎无法识别我已经将权限放入 AndroidManifest.xml 文件中。

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

以下是调用 ACCESS_NETWORK_STATE 的方法。调用时的部分

public boolean isNetworkAvailable(Context context) {
        boolean isOnline = false;
        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        try {
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
                NetworkCapabilities capabilities = manager.getNetworkCapabilities(manager.getActiveNetwork());
                isOnline = capabilities != null && capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED);
            } else {
                NetworkInfo activeNetworkInfo = manager.getActiveNetworkInfo();
                isOnline = activeNetworkInfo != null && activeNetworkInfo.isConnectedOrConnecting();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return isOnline;
    }

private void showConnectDialog() {
        Log.d(TAG, "showConnectDialog: trying to show the connect dialog");
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this,R.style.MyAlertDialogStyle);
        builder.setMessage("Please connect to the internet to proceed further")
                .setCancelable(false)
                .setPositiveButton("Connect", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int i) {
                        startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));
                    }
                });
        builder.show();
    }

在我的主要活动 oncreate 中：

if (!isNetworkAvailable(MainActivity.this)){
            showConnectDialog();
        }
        if (isServicesOK()) {
            init();
        }

MobileAds.initialize(this, new OnInitializationCompleteListener() {
            @Override
            public void onInitializationComplete(InitializationStatus initializationStatus) {
            }
        });
        AdView mAdView = findViewById(R.id.adViewMain);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);

您可以在图像（附在下面）中看到，我的 isNetworkAvailable 方法以及我的 Google AdMob 都有错误。如果我将鼠标悬停在错误上，Android Studio 会提到我需要为 isNetworkAvailable 方法添加 ACCESS_NETWORK_STATE 权限，并为 Google AdMob 添加 INTERNET 权限。但我的 AndroidManifest.xml 中已经有了它们。我还遗漏了什么吗？非常感谢您的帮助。

Google AdMob 中出现错误

isNetworkAvailable 方法错误

Answer 1

我自己尝试了你的代码并且运行成功。;)

package com.mansi.stackissue;

import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkCapabilities;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.MobileAds;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (!isNetworkAvailable(MainActivity.this)){
            showConnectDialog();
        }


        MobileAds.initialize(this, initializationStatus -> {
        });
        AdView mAdView = findViewById(R.id.adViewMain);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);
    }

    public boolean isNetworkAvailable(Context context) {
        boolean isOnline = false;
        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        try {
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
                NetworkCapabilities capabilities = manager.getNetworkCapabilities(manager.getActiveNetwork());
                isOnline = capabilities != null && capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED);
            } else {
                NetworkInfo activeNetworkInfo = manager.getActiveNetworkInfo();
                isOnline = activeNetworkInfo != null && activeNetworkInfo.isConnectedOrConnecting();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return isOnline;
    }

    private void showConnectDialog() {
        Log.d("TAG", "showConnectDialog: trying to show the connect dialog");
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this,R.style.Theme_AppCompat_DayNight_Dialog_Alert);
        builder.setMessage("Please connect to the internet to proceed further")
                .setCancelable(false)
                .setPositiveButton("Connect", (dialog, i) -> startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS)));
        builder.show();
    }
}

清单文件（添加您的APP ID）

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mansi.stackissue">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<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/Theme.StackIssue">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <meta-data
        android:name="com.google.android.gms.ads.APPLICATION_ID"
        android:value="ca-app-pub-**********"/>
</application>

布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="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">

<com.google.android.gms.ads.AdView
    android:id="@+id/adViewMain"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    ads:adSize="BANNER"
    ads:adUnitId="YOUR_UNIT_ID" />

</LinearLayout>

请清理您的项目并再次重新构建。它会起作用的。快乐编码！