android - 为 Android AppWidget 实施许可服务

Question

实施应用程序许可非常简单，但看起来示例代码是为完整的 android 应用程序而不是小部件量身定制的。

就像，在应用程序中，我们主要在启动屏幕或主要活动中添加许可代码，如果不允许用户，那么我们只是完成活动并且不允许使用应用程序。

同样，在小部件中，任何人都可以就在哪里添加许可代码以及如果不允许用户采取什么措施提供一些线索？

如果有人能举出例子，那就太好了。

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。如果您没有得到肯定的结果，请不要让他们添加小部件。您可以在小部件更新服务中进行定期许可证检查。

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。以下是许可服务实施的配置活动：

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();
    }

}