错误：（51，9）错误：找不到符号变量mTracker Google Analytics

Question

嗨，我试着把谷歌分析在我的应用程序，我看到留档，但不为我工作，我有这个错误错误：（51,9）错误：找不到符号变量mTracker：

分析pplication.java

public class AnalyticsApplication extends Application {
private Tracker mTracker;

/**
 * Gets the default {@link Tracker} for this {@link Application}.
 * @return tracker
 */
synchronized public Tracker getDefaultTracker() {
    if (mTracker == null) {
        GoogleAnalytics analytics = GoogleAnalytics.getInstance(this);
        // To enable debug logging use: adb shell setprop log.tag.GAv4 DEBUG
        mTracker = analytics.newTracker(R.xml.global_tracker);
    }
    return mTracker;
}

显示：

<?xml version="1.0" encoding="utf-8"?>

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />


<application
    .....
</application>

主要活动

public class MainActivity extends Activity {

int n;
String adc;

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    // Obtain the shared Tracker instance.
    MYPACKAGE.AnalyticsApplication application = (MYPACKAGE.AnalyticsApplication) getApplication();
    mTracker = application.getDefaultTracker();

...

错误：错误：（51,9）错误：找不到符号变量mTracker

修复：问题是我需要将其放入主活动：

公共类主活动扩展活动{

int n;
String adc;
**private Tracker mTracker;**
@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    // Obtain the shared Tracker instance.

Answer 1

将此添加到您的清单中：

<application
name = "yourpackagename.applicationclassname"
    .....
</application>

试试这个，这个会管用的

Answer 2

MainActivity类正在使用应用程序中定义的字段mTracker。

建议您这样更改代码：

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    // Obtain the shared Tracker instance.
    MYPACKAGE.AnalyticsApplication application = (MYPACKAGE.AnalyticsApplication) getApplication();
    Tracker tracker = application.getDefaultTracker(); // Changed.