Question

我的android程序中有一个ListView（字符串数组中的一组预定义的引号），当选择一个项目时，它似乎不起作用。 ListView已填充，但我的onClickListener中的toast消息从未被调用。我不确定这里的问题是什么。我以前从未遇到过这个问题。

这是我的onCreate方法

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main); 
        listView = (ListView)findViewById(R.id.listView);
        List<String> quotesList = new ArrayList<String>(Arrays.asList(quotes));
        ArrayAdapter arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, quotesList);
        listView.setAdapter(arrayAdapter);  
        listView.setOnItemSelectedListener(new ListView.OnItemSelectedListener(){
            @Override
            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
                Toast.makeText(getApplicationContext(), "Toast", Toast.LENGTH_SHORT).show();
            }
            @Override
            public void onNothingSelected(AdapterView<?> parentView) {}
        });
    }

这是我的activity_main.xml

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#b2cfff"
    tools:context="com.examples.myteststuff.listviews.MainActivity">
    <LinearLayout
        android:layout_width="368dp"
        android:layout_height="495dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">
        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:src="@drawable/icon"
            android:layout_height="wrap_content" />
        <ListView
            android:layout_width="match_parent"
            android:id="@+id/listView"
            android:background="@drawable/border"
            android:layout_marginHorizontal="8dp"
            android:layout_marginVertical="8dp"
            android:layout_height="match_parent"/>
    </LinearLayout>
</android.support.constraint.ConstraintLayout>

Answer 1

请尝试setOnItemClickListener：

    list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
               Toast.makeText(getApplicationContext(), "Toast", Toast.LENGTH_SHORT).show();
            }
        });

希望这有帮助

Android：ListView“setOnItemSelectedListener”无法正常工作

1 个答案: