监控Activity在前后台状态的切换

public class BaseActivity extends Activity{

@Override
protected void onStop() {
    boolean isOnForeground=isAppOnForeground();
    RaiingLog.d("前后台测试-->>onStop-->>" + isAppOnForeground()+", name-->>"+this.getClass().getName()+", isShowDialog-->>"+isShowDialog);
    super.onStop();
}

@Override
protected void onResume() {
    super.onResume();
    boolean isOnForeground=isAppOnForeground();
    RaiingLog.d("前后台测试-->>onResume-->>" + isAppOnForeground()+", name-->>"+this.getClass().getName()+", isShowDialog-->>"+isShowDialog);

}
/**
 * 程序是否在前台运行
 *
 * @return
 */
public boolean isAppOnForeground() {
    // Returns a list of application processes that are running on the
    // device

    ActivityManager activityManager = (ActivityManager) getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);
    String packageName = getApplicationContext().getPackageName();

    List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager
            .getRunningAppProcesses();
    if (appProcesses == null)
        return false;

    for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) {
        // The name of the process that this object is associated with.
        if (appProcess.processName.equals(packageName)
                && appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
            return true;
        }
    }

    return false;
}
}