Question

我有一个具体问题。我正在创建一个应用程序，允许我显示某些菜肴的接收。我设计了一个包含TextView和RatingBar的自定义适配器。所以在我的其他Activity（ViewDatabase）中，我从JSON-File（方法被称为：showData）中检索dish-name，并将其显示在获取自定义适配器的ListView上。

我现在的问题是，我不知道为什么我只能选择我的菜名（所以我的适配器的textview）或者评级栏（也在我的适配器中）。

我试图输入方法：myListView.setItemsCanFocus（true）;但仍然无法工作。

我没有在适配器中为我的文本实现clicklistener吗？我试图实现一个。我需要一个明确的意图，交换活动，但我不能从一个Adapterclass转到intent中的另一个类。

在ViewDatabse-类是onItem单击我的方法，如果我点击文本，我将更改激活。

这是我的代码：

适配器：

A）

public UserInformationAdapter(Context context, List<UserInformation> objects) {
    super(context, R.layout.rating_item, objects);
    this.context = context;
    table = objects;
}

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

    if (v == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = inflater.inflate(R.layout.rating_item, null);
    }

    TextView name = (TextView) v.findViewById(R.id.hauptgerichte);
    RatingBar ratingBar = (RatingBar) v.findViewById(R.id.rate_bar);

    UserInformation userInformation = table.get(position);


    ratingBar.setOnRatingBarChangeListener(onRatingChangedListener(position));

    ratingBar.setTag(position);
    ratingBar.setRating(getItem(position).getRatingStar());

    name.setText(userInformation.getName());

    name.setTag(position);
    return v;
}

private RatingBar.OnRatingBarChangeListener onRatingChangedListener(final int position) {
    return new RatingBar.OnRatingBarChangeListener() {
        @Override
        public void onRatingChanged(RatingBar ratingBar, float v, boolean b) {
            UserInformation item = getItem(position);
            assert item != null;
            item.setRatingStar(v);
            Log.i("Adapter", "star: " + v);
        }
    };
}

}

这是项目（名称和评级栏）：

公共类UserInformation {

private String name;
private float ratingStar;


public UserInformation(){

}

public String getName() {
    return name;
}


public void setName(String name) {
    this.name = name;
}

void setRatingStar(float ratingStar) {
    this.ratingStar = ratingStar;
}

float getRatingStar() {
    return 0;
}


    @Override
public String toString(){
    return name;
}

}

这是检索名称的活动：

的活动：

公共类ViewDatabase扩展了AppCompatActivity {

private static final String TAG = "ViewDatabase";
private FirebaseDatabase mFirebaseDatabase;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
private DatabaseReference myRef;
private String userID;
private  ArrayList<String> array;

private final List<UserInformation>  arr = new ArrayList<>();
private UserInformationAdapter adapter2;

private ListView mListView;




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

    array = new ArrayList<>();
    mListView = (ListView) findViewById(R.id.list_karnivoure);
    mListView.setItemsCanFocus(true);


    mAuth = FirebaseAuth.getInstance();
    mFirebaseDatabase = FirebaseDatabase.getInstance();
    myRef = mFirebaseDatabase.getReference();


    FirebaseUser user = mAuth.getCurrentUser();
    userID = user.getUid();





    myRef.child("shakes").addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            // This method is called once with the initial value and again
            // whenever data at this location is updated.
            showData(dataSnapshot);
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });
}

private void showData(DataSnapshot dataSnapshot) {

    Iterable<DataSnapshot> children = dataSnapshot.getChildren();

    for (DataSnapshot child: children){

        UserInformation uInfo =  child.getValue(UserInformation.class);
        arr.add(uInfo);

        adapter2 = new UserInformationAdapter(ViewDatabase.this, arr);

        mListView.setAdapter(adapter2);
        mListView.setItemsCanFocus(true);

        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                mListView.setItemsCanFocus(true);
                Object listItem = mListView.getItemAtPosition(position);
                Intent i = new Intent(ViewDatabase.this,KarnivoureInput.class);
                i.putExtra("name", listItem.toString());
                startActivity(i);
            }
        });

    }

Answer 1

https://stackoverflow.com/a/8955441/5608931

尝试将此归因添加到$message = new AMQPMessage($data); $headers = new Wire\AMQPTable(array( 'x-foo'=>'bar', 'table'=>array('figuf', 'ghf'=>5, 5=>675), 'num1' => -4294967295, 'num2' => 5, 'num3' => -2147483648, 'true' => true, 'false' => false, 'void' => null, 'date' => new DateTime(), 'array' => array(null, 'foo', 'bar', 5, 5674625, 'ttt', array(5, 8, 2)), 'arr_with_tbl' => array( 'bar', 5, array('foo', 57, 'ee', array('foo'=>'bar', 'baz'=>'boo', 'arr'=>array(1,2,3, true, new DateTime()))), 67, array( 'foo'=>'bar', 5=>7, 8=>'boo', 'baz'=>3 ) ), '64bitint' => 9223372036854775807, '64bit_uint' => '18446744073709600000', '64bitint_neg' => -pow(2, 40) )); $headers->set('shortshort', -5, Wire\AMQPTable::T_INT_SHORTSHORT); $headers->set('short', -1024, Wire\AMQPTable::T_INT_SHORT); $message->set('application_headers', $headers);和TextView。它可以点击但不会得到专注

RatingBar

Android - 如何处理单个ListViewItem中的多个元素？

1 个答案: