Question

我正在开发使用Firebase数据库作为后端的Android应用程序。列表查看从我的Json密钥检索的项目。例如： -

 {
    "Player3" : {
        "LY" : "ewfw",
        "Ty" : "rwerw"
      }
 }

然后，＆＃34; LY＆＃34;和＆＃34; TY＆＃34;将被加载在As列表中查看项目（工作正常）。在我想要的是什么时候＆＃34; LY＆＃34;或＆＃34; TY＆＃34; （列表查看项目）点击＆＃34; ewfw＆＃34;或者＆＃34; rwerw＆＃34;将在细节活动上显示。问题是只有Key显示在详细活动而非Value。如何为详细活动加载价值？这是我的代码......

ListItemActivity.Java

public class ListItemActivity5 extends Fragment {
    private static final String TAG = "Tab4Fragment";
    //String[] values = new String[]{"", "", "", "", "", "", "", "", ""};
    ListView listView;
    TextView textView;
    Array array;
    RelativeLayout relativeLayout;
    ViewGroup.LayoutParams layoutparams;
    private DatabaseReference mDatabase;
    RelativeLayout container;
    AnimationDrawable anim;
    Context context;

    //private TextView text;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.activity_conferance, container, false);
        //text = (TextView) view.findViewById(R.id.textView1);
        listView = (ListView) view.findViewById(R.id.list);
        container = (RelativeLayout) view.findViewById(R.id.container5);
        final TextView textView1 = (TextView) view.findViewById(R.id.textView1);
        anim = (AnimationDrawable) container.getBackground();
        anim.setEnterFadeDuration(2000);
        anim.setExitFadeDuration(3000);
        final ListView listView = (ListView) view.findViewById(R.id.list);
        final ArrayList<String> friends = new ArrayList<String>();

        mDatabase = FirebaseDatabase.getInstance().getReference("Player");
        mDatabase.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(final DataSnapshot dataSnapshot) {
                friends.clear();
                for (final DataSnapshot player : dataSnapshot.getChildren()) {
                    Log.i("Player", player.getKey());
                    friends.add(player.getKey());
                    player.getValue();


                    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                        public void onItemClick(AdapterView<?> parent, View view,
                                                int position, long id) {
                            player.getValue();
                            //player2 = (String) String.valueOf(player.getValue());
                            //String topic = String.valueOf(player.getValue());
                            //topic = (String) parent.getItemAtPosition(position);
                            Intent intent = new Intent(getContext(), Details.class);

                            intent.putExtra("key", String.valueOf(player.getValue()));

                            startActivity(intent);


                        }

                    });
                }
                ArrayAdapter arrayAdapter = new ArrayAdapter(getContext(), android.R.layout.simple_list_item_1,
                        friends) {

                    @Override
                    public View getView(int position, View convertView, ViewGroup parent) {

                        View view = super.getView(position, convertView, parent);

                        layoutparams = view.getLayoutParams();
                        TextView textView = (TextView) view.findViewById(android.R.id.text1);

            /*YOUR CHOICE OF COLOR*/
                        textView.setTextColor(Color.WHITE);
                        textView.setTextSize(22);

                        //Define your height here.
                        //layoutparams.height = 240;

                        view.setLayoutParams(layoutparams);

                        return view;


                    }
                };
                listView.setAdapter(arrayAdapter);
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }


        });

        return view;
    }

}

Details.Java

public class Details extends Activity {
    RelativeLayout container;
    AnimationDrawable anim;
    ScrollView mScrollView;
    TextView textView1;
    private DatabaseReference mDatabase;
    private ListItemActivity1 mylist1;
    private DataSnapshot dataSnapshot;
    FloatingActionButton floatingActionButton;
    private ListItemActivity5 listItemActivity5;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ab1);

        textView1 = (TextView) findViewById(R.id.textView1);
        //mref = new Firebase("https://tafach-love-2.firebaseio.com/");
        Intent intent = getIntent();

        if(intent.hasExtra("key")){
            textView1.setText(intent.getStringExtra("key"));
        }
        textView1.setMovementMethod(new ScrollingMovementMethod());

 }
}

感谢您的帮助。

Answer 1

我的问题得到了答案。我将这些行放在List ItemActivity上的代码中，并在ChildEventListner中设置onclickListner而不是AddEventLister ......

 mDatabase.addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(DataSnapshot dataSnapshot, String s) {
                final String playerName = dataSnapshot.getValue(String.class);
                hy.add(playerName);
                listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    public void onItemClick(AdapterView<?> parent, View view,
                                            int position, long id) {
                        //player.getValue();
                        //player2 = (String) String.valueOf(player.getValue());
                        //String topic = String.valueOf(player.getValue());
                        //topic = (String) parent.getItemAtPosition(position);
                        Intent intent = new Intent(getContext(), Details.class);

                        intent.putExtra("key", String.valueOf(hy.get(position)));

                        startActivity(intent);


                    }

                });
            }

单击ListView项目时如何在详细活动上加载Firebase DB Vaule

1 个答案: