如何在Android中获取设备ID？

I am trying to have 2 things in my Android application.

我想在我的Android应用程序中有两件事。

Get the device id and then open a webpage with this id . eg myserver.com/deviceId

获取设备ID，然后打开具有此ID的网页。例如myserver.com/deviceId

My main java class looks like this :

我的主java类看起来像这样：

package es.unican.CityInfo;

import android.os.Bundle;
import android.app.Activity;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.provider.Settings.Secure;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main); 


        WebView mywebview = (WebView) findViewById(R.id.webview);
        mywebview.loadUrl("http://www.google.com");

        //enabling Javascript
        WebSettings webSettings = mywebview.getSettings();
        webSettings.setJavaScriptEnabled(true);

        //opening links in my webview. if you delete this line , any link pressed will cause the browser to start
        mywebview.setWebViewClient(new WebViewClient());

    }


}

In order to get the device id i read that i should do something like this :

为了得到设备ID我读到我应该做这样的事情：

import android.provider.Settings.Secure;

private String android_id = Secure.getString(getContext().getContentResolver(),
                                                        Secure.ANDROID_ID);

However i dont understand where i should place the android_id code as i always get an error.

但是，我不明白我应该放置android_id代码，因为我总是得到一个错误。

The error is:

错误是：

Multiple markers at this line:

- The method getcontext() is undefined for the type MainActivity
- Illegal modifier for parameter android_id; only final is permitted

6 个解决方案

#1

Replace your error line with this:

用这个替换你的错误行：

String android_id = Secure.getString(this.getContentResolver(),Secure.ANDROID_ID);

#2

private String android_id; // declared on top of class

android_id = Secure.getString(getContentResolver(), Secure.ANDROID_ID); // called inside onCreate

#3

Remove private modifier and also don't use getContext() instead use getApplicationContext() or simply getContentResolver()

删除私有修饰符也不要使用getContext（）而是使用getApplicationContext（）或只是getContentResolver（）

inside your onCreate() method:

在你的onCreate（）方法中：

String android_id = Secure.getString(getContentResolver(),Secure.ANDROID_ID);

#4

Change your line in code:

在代码中更改您的行：

    getContext to getBaseContext

#5

Use this line

使用此行

 String android_id = Secure.getString(this.getContentResolver(), Secure.ANDROID_ID);

Since you are declaring string inside a method it will be scoped inside it. You can get Activity context by using this.

由于您在方法中声明字符串，因此它将在其中作用域。您可以使用此方法获取Activity上下文。

#6

import android.provider.Settings.Secure;

    String android_id = Secure.getString(getApplicationContext().getContentResolver(),Secure.ANDROID_ID);

#1