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"
和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!
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();
}
});
}