Question

public class Gallery extends AppCompatActivity {
static ArrayList<String> images;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_gallery);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle("Gallery");

        toolbar.setTitleTextColor(ContextCompat.getColor(Gallery.this, R.color.white));
        images = new ArrayList<>();
        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onBackPressed();
            }
        });
        final GridView gridview = (GridView) findViewById(R.id.gridview);
        final ProgressDialog progressDialog = new ProgressDialog(Gallery.this);
        progressDialog.setMessage("Loading data...");
        progressDialog.show();
        ConnectivityManager manager = (ConnectivityManager) getApplicationContext().getSystemService(CONNECTIVITY_SERVICE);
        NetworkInfo info = manager.getActiveNetworkInfo();
        final boolean isconnected = info != null && info.isConnectedOrConnecting();
        Firebase.setAndroidContext(Gallery.this);
        if (Firebase.getDefaultConfig().isPersistenceEnabled() == false)   //check if persistence is enabled or disbled
            Firebase.getDefaultConfig().setPersistenceEnabled(true);
        String URL = "someurl";
        Firebase firebase = new Firebase(URL);
        final ImageAdapter adapter = new ImageAdapter(Gallery.this, images);

        final Firebase imagefolder = firebase.child("imagesfolder");
        imagefolder.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                    images.add(snapshot.getValue(String.class));
                    adapter.notifyDataSetChanged();
                }
            }

            @Override
            public void onCancelled(FirebaseError firebaseError) {

            }
        });

} }

这是来自Android设备监视器的崩溃报告

java.lang.RuntimeException：出了点问题，请报告给 support@firebase.com 在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2195）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2245）在android.app.ActivityThread.access $ 800（ActivityThread.java:135）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1196）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:136）在android.app.ActivityThread.main（ActivityThread.java:5017） at java.lang.reflect.Method.invokeNative（Method.java）在java.lang.reflect.Method.invoke（Method.java:515）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:779）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:595）在dalvik.system.NativeStart.main（NativeStart.java）

Answer 1

使用DatabaseReference类而不是使用Firebase

解决了错误

private DatabaseReference mDatabase;
    FirebaseDatabase database = FirebaseDatabase.getInstance();
    mDatabase=database.getReference().child("imagesfolder");
    final ImageAdapter adapter = new ImageAdapter(Gallery.this, images);
     mDatabase.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                    images.add(snapshot.getValue(String.class));
                    adapter.notifyDataSetChanged();
                }
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });

Android使用Firebase Build APK工作正常但发布APK崩溃

1 个答案: