ListView OnItemClickListener并不总是触发

时间:2017-06-11 23:55:31

标签: android listview

似乎我的ListView OnItemClickListener似乎并不总是被调用。 ListView使用嵌入式TextView。

如果您点击每个项目的顶部或底部3px,则听众会触发。

如果单击TextView的文本,则侦听器不会像使用/阻止单击一样触发。

我尝试了很多将focusable="false"clickable="false"focusableInTouchMode="false"添加到TextView并将android:descendantFocusability="beforeDescendants"添加到根视图的组合。

activity_local_explorer.xml

<?xml version="1.0" encoding="utf-8"?>
<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:descendantFocusability="beforeDescendants"
tools:context="my.package.FileBrowser">

<ListView
    android:id="@+id/local_file_view"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:clickable="true" />

<TextView
    android:id="@+id/local_file_view_text"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:clickable="false"
    android:focusable="false"
    android:focusableInTouchMode="false"
    android:textSize="25sp"/>

</android.support.constraint.ConstraintLayout>

活动

public class LocalExplorer extends AppCompatActivity {

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

    String[] values = { "Hello", "My", "Friend"};

    ListView listView = (ListView) findViewById(R.id.local_file_view);
    listView.setAdapter(new ArrayAdapter<>(this, R.layout.activity_local_explorer, R.id.local_file_view_text, values));
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {

            String selectedValue = getItemAtPosition(position);
            Snackbar.make(listView, selectedValue, 2).show();
        }    
    });
}

任何帮助都会非常感激,因为我花了好几个小时来完成这个简单的活动!

1 个答案:

答案 0 :(得分:0)

首先,我要感谢那些试图帮我回答问题的人,非常感谢你的时间。

好的,我通过略微改变方法,终于让这个工作了。我将TextView从activity_local_explorer.xml移出到它自己的xml布局文件中,并在创建适配器时使用了不同的构造函数。

activity_local_explorer.xml

<?xml version="1.0" encoding="utf-8"?>
<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:descendantFocusability="blocksDescendants"
tools:context="my.package.FileBrowser">

    <ListView
        android:id="@+id/local_file_view"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:layout_constraintBottom_creator="1"
        tools:layout_constraintLeft_creator="1"
        tools:layout_constraintRight_creator="1"
        tools:layout_constraintTop_creator="1" />

</android.support.constraint.ConstraintLayout>

local_explorer_row.xml

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rowTextView"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:padding="10dp"
    android:textSize="16sp" >
</TextView>

活动

public class LocalExplorer extends AppCompatActivity {

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

    String[] values = { "Hello", "My", "Friend"};

    ListView listView = (ListView) findViewById(R.id.local_file_view);
    listView.setAdapter(new ArrayAdapter<>(this, R.layout.local_explorer_row, values));
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {

            String selectedValue = getItemAtPosition(position);
            Snackbar.make(listView, selectedValue, 2).show();
        }    
    });
}