如何解决Android Studio 无法识别 AndroidManifest 中的使用权限
我遇到了一个问题,我的 Android Studio 似乎无法识别我的 AndroidManifest.xml 文件中的使用权限。在我的主要 Activity 中,当我尝试调用某些需要 INTERNET 和 ACCESS_NETWORK_STATE 的函数时,该 Activity 似乎无法识别我已将权限放入 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" />
下面是调用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);
您可以在图片(下附)中看到,我的 isNetworkAvailable 方法以及我的 Google AdMob 都存在错误。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。但是我的 AndroidManifest.xml 中已经有了它们。 我还有什么遗漏吗?非常感谢您的帮助。
Error in isNetworkAvailable method
解决方法
我自己尝试了你的代码,它运行成功。 ;)
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(添加您的应用程序 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>
请清理您的项目并重新构建。它会起作用。 快乐编码!!
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