小编Dom*_*omi的帖子

我正在构建一个从Firebase获取数据的应用程序,将其添加到数组适配器中并将其显示在列表视图中.当我尝试构建应用程序时,它失败了:

错误:任务':app:transformClassesWithInstantRunForDebug'的执行失败.java.lang.IllegalStateException:预期为BEGIN_ARRAY,但在第1行第1行为STRING路径$

我的活动:

    package app.nert;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdSize;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.MobileAds;
import com.google.firebase.database.ChildEventListener;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Locale;

public class display extends AppCompatActivity {
    private AdView mAdView;
    private ArrayList<String> ttable = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_display);
        MobileAds.initialize(this, "ca-app-pub-...");
        AdView adView = new AdView(this);
        adView.setAdSize(AdSize.BANNER);
        adView.setAdUnitId("ca-app-pub-...");
        mAdView …