如何授权我的Android应用程序？

Question

我即将完成我的Android应用程序。现在我想将我的应用程序上传到Android市场以获得付费应用程序。对于那些我已经从Android网站阅读文档：

android licensing

但我希望看到曾做过这样的许可任何演示或项目。我已经看到了主要活动的android开发人员网站上的演示。但是那里给出了处理程序，我想将该代码实现到我的项目的主要活动中。 在mymainactivity中，在应用程序的开始处有一个启动画面，并且我为它设置了一个处理程序。所以这就是为什么我需要一个例子，看看如何在我们自己的应用程序中实现许可。

我想知道的另一件事是，为了将付费应用程序上传到Android市场，是否必须实施Android许可？

是否可以将应用程序设置为付费而不实施Android应用程序的许可？
如果有，并且有任何演示可用，请给我一个链接。

Answer 1

在开始之前，请您已经包括在您的项目许可证库作为解释在这里： Licensing Your Applications | Android Developers

1. 请在您的项目中的新活动称为LicenseCheck.java

2. 粘贴以下在该活动中：

   import android.app.Activity; 
   import android.app.AlertDialog; 
   import android.app.Dialog; 
   import android.content.DialogInterface; 
   import android.content.Intent; 
   import android.net.Uri; 
   import android.os.Bundle; 
   import android.provider.Settings.Secure; 
   import android.widget.Toast; 
   import com.android.vending.licensing.AESObfuscator; 
   import com.android.vending.licensing.LicenseChecker; 
   import com.android.vending.licensing.LicenseCheckerCallback; 
   import com.android.vending.licensing.ServerManagedPolicy; 
   
   /** 
   * NOTES ON USING THIS LICENSE FILE IN YOUR APPLICATION: 
   * 1. Define the package 
   * of you application above 
   * 2. Be sure your public key is set properly @BASE64_PUBLIC_KEY 
   * 3. Change your SALT using random digits 
   * 4. Under AllowAccess, Add your previously used MainActivity 
   * 5. Add this activity to 
   * your manifest and set intent filters to MAIN and LAUNCHER 
   * 6. Remove Intent Filters from previous main activity 
   */ 
   public class LicenseCheck extends Activity { 
   private class MyLicenseCheckerCallback implements LicenseCheckerCallback { 
   @Override 
   public void allow() { 
        if (isFinishing()) { 
            // Don't update UI if Activity is finishing. 
            return; 
   } 
   // Should allow user access. 
   startMainActivity(); 
   
         } 
   
   @Override 
   public void applicationError(ApplicationErrorCode errorCode) { 
       if (isFinishing()) { 
        // Don't update UI if Activity is finishing. 
        return; 
       } 
       // This is a polite way of saying the developer made a mistake 
       // while setting up or calling the license checker library. 
       // Please examine the error code and fix the error. 
       toast("Error: " + errorCode.name()); 
       startMainActivity(); 
   
   } 
   
   @Override 
   public void dontAllow() { 
       if (isFinishing()) { 
        // Don't update UI if Activity is finishing. 
        return; 
       } 
   
       // Should not allow access. In most cases, the app should assume 
       // the user has access unless it encounters this. If it does, 
       // the app should inform the user of their unlicensed ways 
       // and then either shut down the app or limit the user to a 
       // restricted set of features. 
       // In this example, we show a dialog that takes the user to Market. 
       showDialog(0); 
   } 
   } 
   private static final String BASE64_PUBLIC_KEY = "PLACE YOUR BASE KEY FROM GOOGLE HERE"; 
   private static final byte[] SALT = new byte[] { INPUT 20 RANDOM INTEGERS HERE }; 
   private LicenseChecker mChecker; 
   
   // A handler on the UI thread. 
   
   private LicenseCheckerCallback mLicenseCheckerCallback; 
   private void doCheck() { 
        mChecker.checkAccess(mLicenseCheckerCallback); 
   } 
   
   @Override 
       public void onCreate(Bundle savedInstanceState) { 
   super.onCreate(savedInstanceState); 
   
   // Try to use more data here. ANDROID_ID is a single point of attack. 
   String deviceId = Secure.getString(getContentResolver(), 
        Secure.ANDROID_ID); 
   
   // Library calls this when it's done. 
   mLicenseCheckerCallback = new MyLicenseCheckerCallback(); 
   // Construct the LicenseChecker with a policy. 
   mChecker = new LicenseChecker(this, new ServerManagedPolicy(this, 
        new AESObfuscator(SALT, getPackageName(), deviceId)), 
        BASE64_PUBLIC_KEY); 
        doCheck(); 
       } 
   
   @Override 
       protected Dialog onCreateDialog(int id) { 
   // We have only one dialog. 
   return new AlertDialog.Builder(this) 
        .setTitle("Application Not Licensed") 
        .setCancelable(false) 
        .setMessage(
          "This application is not licensed. Please purchase it from Android Market") 
        .setPositiveButton("Buy App", 
          new DialogInterface.OnClickListener() { 
           @Override 
           public void onClick(DialogInterface dialog, 
             int which) { 
            Intent marketIntent = new Intent(
              Intent.ACTION_VIEW, 
              Uri.parse("http://market.android.com/details?id=" 
                + getPackageName())); 
            startActivity(marketIntent); 
            finish(); 
           } 
          }) 
        .setNegativeButton("Exit", 
          new DialogInterface.OnClickListener() { 
           @Override 
           public void onClick(DialogInterface dialog, 
             int which) { 
            finish(); 
           } 
          }).create(); 
       } 
       @Override 
       protected void onDestroy() { 
   super.onDestroy(); 
   mChecker.onDestroy(); 
       } 
   
       private void startMainActivity() { 
   startActivity(new Intent(this, MainActivity.class)); //REPLACE MainActivity.class WITH YOUR APPS ORIGINAL LAUNCH ACTIVITY 
   finish(); 
       } 
   
       public void toast(String string) { 
   Toast.makeText(this, string, Toast.LENGTH_SHORT).show(); 
       } 
   
   } 
   

3. 更改基本密钥为一个谷歌提供d，在SALT中放置20个随机整数，将MainActivity.class更改为应用程序的主要活动。

4. 更新您的新活动

   <!-- Old Launch Activity Here --> 
   <activity android:label="@string/app_name" android:name=".MainActivity" /> 
   <!-- New License Launch Activity with all intent filters from your previous main activity --> 
   <!-- Translucent.NoTitleBar is so that this activity is never shown to the user -->  
   <activity android:label="@string/app_name" android:name=".LicenseCheck" 
       android:theme="@android:style/Theme.Translucent.NoTitleBar"> 
       <intent-filter> 
        <action android:name="android.intent.action.MAIN" /> 
        <category android:name="android.intent.category.LAUNCHER" /> 
       </intent-filter> 
   </activity> 
   

5. 添加权限在清单标签，但不是在应用程序标签

   <uses-permission android:name="com.android.vending.CHECK_LICENSE" /> 
   

大功告成清单文件！确保在发布之前对其进行测试。 :) :)