App執行時遇到 Error:

consent form can be used with custom provider selection only.

或 Error:

consent form can be used with custom provider selection only.

這 2個都是因為選擇了 “Commonly used set of ad technology providers”.

According to documentation on Google Developers site:

Important: The Google-rendered consent form is not supported if any of your publisher IDs use the commonly used set of ad technology providers. Attempting to load the Google-rendered consent form will always fail in this case.

結論：the only case you can make use of Google-rendered form is use “Custom set of ad technology providers”.

解法 1號，選成 Custom 去挑 12個就可以了。

解法 2號，使用自己畫的 dialog, 這個解決會比較好，比較簡單，也可以解決  Consent SDK 翻譯的問題：

The Consent SDK allows to show a consent form which, however, it is currently in English only (version 1.0.3 of the SDK). SDK page says:

To update consent text of the Google-rendered consent form, modify the consentform.html file included in the Consent SDK as required.

解法 2號 URL:

解法 2號執行畫面：

原作者表示，可以使用他提供的 source code:

You are free to use my code, however consult your legal advisor, if the text is appropriate for you. I cannot provide legal advice on the consent text that is appropriate for you.

Add to your gradle file:

implementation 'com.google.android.ads.consent:consent-library:1.0.3'

Add member variables:

public boolean mShowNonPersonalizedAdRequests = false;
private AlertDialog mEuDialog;

In onCreate() call checkConsentStatus():

@Override
protected void onCreate(Bundle savedInstanceState) {
    // ...
    checkConsentStatus();
    // ...   
}

Add checkConsentStatus() method which uses Google’s Consent SDK:

// https://developers.google.com/admob/android/eu-consent
private void checkConsentStatus(){
    ConsentInformation consentInformation = ConsentInformation.getInstance(this);
    ConsentInformation.getInstance(this).addTestDevice("YOUR-DEVICE-ID"); // enter your device id, if you need it for testing

    String[] publisherIds = {"pub-YOUR-ADMOB-PUB-ID"}; // enter your admob pub-id
    consentInformation.requestConsentInfoUpdate(publisherIds, new ConsentInfoUpdateListener() {
        @Override
        public void onConsentInfoUpdated(ConsentStatus consentStatus) {
            log("User's consent status successfully updated: " +consentStatus);

            if (ConsentInformation.getInstance(MainActivity.this).isRequestLocationInEeaOrUnknown()){
                log("User is from EU");

                /////////////////////////////
                // TESTING - reset the choice
                //ConsentInformation.getInstance(MainActivity.this).setConsentStatus(ConsentStatus.UNKNOWN);
                /////////////////////////////

                // If the returned ConsentStatus is UNKNOWN, collect user's consent.
                if (consentStatus == ConsentStatus.UNKNOWN) {
                    showMyConsentDialog(false);
                }

                // If the returned ConsentStatus is PERSONALIZED or NON_PERSONALIZED
                // the user has already provided consent. Forward consent to the Google Mobile Ads SDK.
                else if (consentStatus == ConsentStatus.NON_PERSONALIZED) {

                    mShowNonPersonalizedAdRequests = true;

                    // The default behavior of the Google Mobile Ads SDK is to serve personalized ads.
                    // If a user has consented to receive only non-personalized ads, you can configure
                    // an AdRequest object with the following code to specify that only non-personalized
                    // ads should be returned.

                }


            } else {
                log("User is NOT from EU");
                // we don't have to do anything
            }

        }

        @Override
        public void onFailedToUpdateConsentInfo(String errorDescription) {
            log("User's consent status failed to update: " +errorDescription);
        }
    });
}

Add showMyConsentDialog() method:

public void showMyConsentDialog(boolean showCancel) {

    AlertDialog.Builder alertDialog = new AlertDialog.Builder(MainActivity.this, R.style.MyAlertDialogStyle);
    LayoutInflater inflater = getLayoutInflater();
    View eu_consent_dialog = inflater.inflate(R.layout.eu_consent, null);

    alertDialog.setView(eu_consent_dialog)
               .setCancelable(false);

    if (showCancel) alertDialog.setPositiveButton(R.string.dialog_close, null);

    mEuDialog = alertDialog.create();
    mEuDialog.show();

    Button btn_eu_consent_yes = eu_consent_dialog.findViewById(R.id.btn_eu_consent_yes);
    Button btn_eu_consent_no = eu_consent_dialog.findViewById(R.id.btn_eu_consent_no);
    Button btn_eu_consent_remove_ads = eu_consent_dialog.findViewById(R.id.btn_eu_consent_remove_ads);
    btn_eu_consent_yes.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mEuDialog.cancel();
            toast(getString(R.string.thank_you), MainActivity.this);
            ConsentInformation.getInstance(MainActivity.this).setConsentStatus(ConsentStatus.PERSONALIZED);
            mShowNonPersonalizedAdRequests = false;
        }
    });
    btn_eu_consent_no.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mEuDialog.cancel();
            toast(getString(R.string.thank_you), MainActivity.this);
            ConsentInformation.getInstance(MainActivity.this).setConsentStatus(ConsentStatus.NON_PERSONALIZED);
            mShowNonPersonalizedAdRequests = true;
        }
    });
    btn_eu_consent_remove_ads.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mEuDialog.cancel();
            IAP_buyAdsFree(); // YOUR REMOVE ADS METHOD
            }
        });

    TextView tv_eu_learn_more = eu_consent_dialog.findViewById(R.id.tv_eu_learn_more);
    tv_eu_learn_more.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            euMoreInfoDialog();
        }
    });  
}

This is the consent layout, save to eu_consent.xml:

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <LinearLayout
        android:id="@+id/ll_eu_consent"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="@dimen/activity_horizontal_margin"
        >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/eu_consent_text"
            android:textSize="14sp"
            android:paddingBottom="6dp"
            />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/eu_consent_question"
            android:textSize="14sp"
            android:paddingBottom="6dp"
            android:textStyle="bold"
        />

        <Button
            android:id="@+id/btn_eu_consent_yes"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/eu_consent_yes"
            android:textSize="13sp"
            />

        <Button
            android:id="@+id/btn_eu_consent_no"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/eu_consent_no"
            android:textSize="13sp"
            android:layout_marginTop="6dp"
            android:layout_marginBottom="6dp"
            />

        <Button
            android:id="@+id/btn_eu_consent_remove_ads"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/action_remove_ads"
            android:textSize="13sp"
            />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/eu_consent_change_setting"
            android:textSize="14sp"
            android:paddingTop="6dp"
            android:paddingBottom="6dp"
            />

        <TextView
            android:id="@+id/tv_eu_learn_more"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/learn_more"
            android:textSize="14sp"
            android:ellipsize="marquee"
            android:fadingEdge="horizontal"
            android:paddingTop="6dp"
            android:paddingBottom="6dp"
            android:textColor="@color/blue"
            style="@style/SelectableItem"
            />

    </LinearLayout>

</ScrollView>

Add euMoreInfoDialog():

private void euMoreInfoDialog(){

    AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this, R.style.MyAlertDialogStyle);

    ScrollView sv = new ScrollView(this);
    LinearLayout ll = new LinearLayout(this);
    ll.setOrientation(LinearLayout.VERTICAL);

    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.WRAP_CONTENT);
    params.setMargins(40, 20, 40, 20);

    TextView tv_my_privacy_policy = new TextView(this);
    String link = "<a href="+PRIVACY_URL+">"+getResources().getString(R.string.app_name)+"</a>";
    tv_my_privacy_policy.setText(Html.fromHtml(link));
    tv_my_privacy_policy.setMovementMethod(LinkMovementMethod.getInstance());
    ll.addView(tv_my_privacy_policy, params);

    TextView tv_google_partners = new TextView(this);
    tv_google_partners.setText(R.string.google_partners);
    tv_google_partners.setPadding(40,40,40,20);
    ll.addView(tv_google_partners);

    List<AdProvider> adProviders = ConsentInformation.getInstance(this).getAdProviders();
    for (AdProvider adProvider : adProviders) {
        //log("adProvider: " +adProvider.getName()+ " " +adProvider.getPrivacyPolicyUrlString());
        link = "<a href="+adProvider.getPrivacyPolicyUrlString()+">"+adProvider.getName()+"</a>";
        TextView tv_adprovider = new TextView(this);
        tv_adprovider.setText(Html.fromHtml(link));
        tv_adprovider.setMovementMethod(LinkMovementMethod.getInstance());
        ll.addView(tv_adprovider, params);
    }
    sv.addView(ll);

    builder.setTitle(R.string.privacy_policy)
           .setView(sv)
           .setPositiveButton(R.string.dialog_close, null);

    final AlertDialog createDialog = builder.create();
    createDialog.show();

}

In your AdMob web interface select the ad technology providers you wish to use. I suggest you don’t select more than 20 (or so), because I assume the euMoreInfoDialog() will become very slow if you select too many providers.

Add to onDestroy() to prevent errors on screen rotate:

@Override
public void onDestroy(){
    // ...
    if (mEuDialog != null && mEuDialog.isShowing()) mEuDialog.cancel();
    // ...
    super.onDestroy();
}

When you make an ad request, check the value of mShowNonPersonalizedAdRequests and add "npa" to the request if necessary:

Bundle extras = new Bundle();
if (mShowNonPersonalizedAdRequests)
    extras.putString("npa", "1");

AdRequest adRequest = new AdRequest.Builder()
    .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
    .addTestDevice("YOUR-DEVICE-ID-GOES-HERE") // insert your device id
    .addNetworkExtrasBundle(AdMobAdapter.class, extras)
    .build();

And lastly, add strings for all your languages to strings.xml:

<!-- EU GDPR Consent texts -->
<string name="privacy_policy">Privacy Policy</string>
<string name="dialog_close">Close</string>
<string name="action_remove_ads">Remove ADs</string>
<string name="eu_consent_text">Dear user!\n\nWe use Google Admob to show ads. Ads support our work, and enable further development of this app. In line with the new European Data Protection Regulation (GDPR), we need your consent to serve ads tailored for you.</string>
<string name="eu_consent_question">Can your data be used to show ads tailored for you?</string>
<string name="learn_more">Learn how your data is used</string>
<string name="google_partners">Google and its partners:</string>
<string name="eu_consent_yes">Yes, continue to show relevant ads</string>
<string name="eu_consent_no">No, show ads that are irrelevant</string>
<string name="eu_consent_change_setting">You can change this setting anytime in the \"About\" window.</string>
<string name="thank_you">Thank you!</string>

That’s it!

(Note: log() and toast() are my methods, replace them with your own. PRIVACY_URL is your String url to your privacy policy.)

toast() 可以試看看這一組：

    public void toast(String text, Context context) {
        Toast.makeText(context, text, Toast.LENGTH_LONG).show();
    }

作者漏掉的 style

<style name="SelectableItem" parent="@android:style/Theme.Material.Light">
    <item name="android:background">?android:attr/selectableItemBackground</item>
</style>

Color:

<color name="red">#FF0000</color>
<color name="green">#00FF00</color>
<color name="blue">#0000FF</color>

相關範例：