为Android AppWidget实施授权服务

Question

实现应用程序授权非常简单，但它看起来好像示例代码是为完整的android应用程序而非小部件量身定制的。

就像在应用程序中，我们大多数都是在启动屏幕或主要活动中添加授权代码，并且如果用户不被允许，那么我们只完成活动并且不允许使用该应用程序。

同样，在小部件中，任何人都可以提供一些线索，说明在哪里添加许可代码以及在不允许用户的情况下应采取的操作？

如果有人能指出例子，那将会很棒。

预先感谢您。

Answer 1

将配置活动添加到您的小部件并在那里实现您的许可逻辑。如果你没有得到积极的结果，不要让他们添加小部件。您可以在小部件更新服务中定期执行许可证检查。

Answer 2

感谢Nikolay指向配置活动。这就是实施许可服务的实际情况。以下是执行许可服务的配置活动：

package com.mobisys.android.contactwidget; 

import com.google.android.vending.licensing.AESObfuscator; 
import com.google.android.vending.licensing.LicenseChecker; 
import com.google.android.vending.licensing.LicenseCheckerCallback; 
import com.google.android.vending.licensing.ServerManagedPolicy; 

import android.app.Activity; 
import android.app.AlertDialog; 
import android.app.Dialog; 
import android.app.ProgressDialog; 
import android.appwidget.AppWidgetManager; 
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; 

public class ConfigActivity extends Activity { 
    private LicenseChecker mChecker; 
    private LicenseCheckerCallback mLicenseCheckerCallback; 
    public static final String BASE64_PUBLIC_KEY = "PUBLIC KEY OF YOUR ACCOUNT"; 
    public static final byte[] SALT = new byte[] { 
    -120, 30, 50, -20, 33, -100, 32, -90, -98, 104, 12, 
    110, 78, -34, 105, 21, 62, 35, -12, 97 
    }; 

    private AESObfuscator mObsfuscator; 
    private String android_id; 
    ProgressDialog pg; 
    int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID; 

    @Override 
    public void onCreate(Bundle bundle){ 
     super.onCreate(bundle); 

     setResult(RESULT_CANCELED); 
     Intent intent = getIntent(); 
     Bundle extras = intent.getExtras(); 
     if (extras != null) { 
      mAppWidgetId = extras.getInt(
        AppWidgetManager.EXTRA_APPWIDGET_ID, 
        AppWidgetManager.INVALID_APPWIDGET_ID); 
     } 

     // If they gave us an intent without the widget id, just bail. 
     if (mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID) { 
      finish(); 
     } 

     pg=ProgressDialog.show(this, "Verification", "Verifying purchase"); 
     pg.show(); 
     android_id = Secure.getString(this.getContentResolver(), Secure.ANDROID_ID); 
     mObsfuscator = new AESObfuscator(SALT, getPackageName(), android_id); 
     ServerManagedPolicy serverPolicy = new ServerManagedPolicy(this,mObsfuscator); 

     mLicenseCheckerCallback = new MyLicenseCheckerCallback(); 
     mChecker = new LicenseChecker(
      this, serverPolicy, 
      BASE64_PUBLIC_KEY // Your public licensing key. 
      ); 
     mChecker.checkAccess(mLicenseCheckerCallback); 
    } 

    private void onAllow(){ 
     Intent resultValue = new Intent(); 
     resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId); 
     setResult(RESULT_OK, resultValue); 
     finish(); 
    } 

    private class MyLicenseCheckerCallback implements LicenseCheckerCallback { 
     @Override 
     public void allow(int reason) { 
      if(pg!=null&&pg.isShowing()) 
       pg.dismiss(); 
      if (isFinishing()) { 
       // Don't update UI if Activity is finishing. 
       return; 
      } 
      runOnUiThread(new Runnable(){ 

       @Override 
       public void run() { 
        onAllow(); 
       } 

      }); 
     } 

     @Override 
     public void dontAllow(int reason) { 
      if(pg!=null&&pg.isShowing()) 
       pg.dismiss(); 

      if (isFinishing()) { 
       // Don't update UI if Activity is finishing. 
       return; 
      } 

      showDialog(0); 
     } 

     @Override 
     public void applicationError(int errorCode) { 
      Toast.makeText(ConfigActivity.this, "Application Error:"+errorCode, Toast.LENGTH_SHORT).show(); 
      if(pg!=null&&pg.isShowing()) 
       pg.dismiss(); 
      if (isFinishing()) return; 

      finish(); 
     } 
    } 

    @Override 
    protected Dialog onCreateDialog(int id) { 
     // We have only one dialog. 
     AlertDialog.Builder builder=new AlertDialog.Builder(this) 
     .setTitle("Application Not Licensed") 
     .setCancelable(false) 
     .setMessage("This application is not licensed. Please purchase it from Google play") 
     .setPositiveButton("Buy App", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog,int which) { 
       Intent marketIntent = new Intent(
        Intent.ACTION_VIEW, 
        Uri.parse("market://details?id=" + getPackageName())); 
        startActivity(marketIntent); 
        finish(); 
       }}) 
       .setNegativeButton("Exit",new DialogInterface.OnClickListener() { 
        @Override 
        public void onClick(DialogInterface dialog, int which) { 
         finish(); 
       } 
      } 
     ); 

     return builder.create(); 
    } 

}