[英]Button in ListView not clickable
我想单击ListView项内的按钮,并且单击整个项应具有相同的效果。 但是,当我单击按钮时,什么都没有发生,当我单击图像时,它全部是Okey。 如何解决? 我尝试在按钮上进行设置:android:focusable =“ true” android:clickable =“ true”我也尝试了android:descendantFocusability。
我的尝试都没有使按钮可点击。
my_item.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:descendantFocusability="blocksDescendants"
>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/button"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:focusable="false"
android:focusableInTouchMode="false"
android:layout_toLeftOf="@+id/imageArrow"
android:layout_toStartOf="@+id/imageArrow"
/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageArrow"
android:layout_alignTop="@+id/button"
android:focusable="false"
android:focusableInTouchMode="false"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:background="@drawable/r_arr" />
</RelativeLayout>
MainActivity.java
public class MainActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_main);
ListView listView = (ListView)findViewById(R.id.listView);
String[] values = new String[] { "Android", "iPhone", "WindowsMobile",
"Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
"Linux", "OS/2" };
MyCustomAdapter adapter = new MyCustomAdapter(this, values);
setListAdapter(adapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
String item = (String) getListAdapter().getItem(position);
Toast.makeText(this, item + " selected", Toast.LENGTH_SHORT).show();
}
}
MyCustomAdapter.java
public class MyCustomAdapter extends ArrayAdapter<String> {
private final Activity context;
private final String[] names;
static class ViewHolder {
public TextView myButton;
public ImageView image;
}
public MyCustomAdapter(Activity context, String[] names) {
super(context, R.layout.my_item, names);
this.context = context;
this.names = names;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView = convertView;
// reuse views
if (rowView == null) {
LayoutInflater inflater = context.getLayoutInflater();
rowView = inflater.inflate(R.layout.my_item, null);
// configure view holder
ViewHolder viewHolder = new ViewHolder();
viewHolder.myButton = (Button)rowView.findViewById(R.id.button);
viewHolder.image = (ImageView) rowView.findViewById(R.id.imageArrow);
viewHolder.myButton.setFocusable(false);
rowView.setTag(viewHolder);
}
// fill data
ViewHolder holder = (ViewHolder) rowView.getTag();
String s = names[position];
String abs=Integer.toString(position + 1);
holder.myButton.setText(s+ " number " + abs);
holder.image.setImageResource(R.drawable.r_arr);
return rowView;
}
}
您只需要配置如下的onClick方法:
findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//your code goes here
}
});
请在按钮上写onclicklistener。
将按钮单击侦听器放入getView中
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView = convertView;
// reuse views
if (rowView == null) {
LayoutInflater inflater = context.getLayoutInflater();
rowView = inflater.inflate(R.layout.my_item, null);
// configure view holder
ViewHolder viewHolder = new ViewHolder();
viewHolder.myButton = (Button) rowView.findViewById(R.id.button);
viewHolder.image = (ImageView) rowView.findViewById(R.id.imageArrow);
viewHolder.myButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// Button click functionalty here
});
rowView.setTag(viewHolder);
}
// fill data
ViewHolder holder = (ViewHolder) rowView.getTag();
String s = names[position];
String abs=Integer.toString(position + 1);
holder.myButton.setText(s+ " number " + abs);
holder.image.setImageResource(R.drawable.r_arr);
return rowView;
}
}
若要使您的列表视图项和按钮都可单击,请执行此操作。
使ListView可聚焦android:focusable =“ true”
按钮在您的自定义列表视图项目android:focusable =“ false”中无法聚焦
方法1:
首先按如下所示替换xml中的按钮代码<Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/button" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:focusable="false" android:onClick="onClick" android:focusableInTouchMode="false" android:layout_toLeftOf="@+id/imageArrow" android:layout_toStartOf="@+id/imageArrow" />
然后转到您的活动并编写如下代码
public void onClick(View v)
{
super.onClick(v);
if (v.getId() == R.id.button)
{
//your code goes here
}
}
或者,您可以在oncreate的代码中添加以下代码
方法2:
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
不建议在列表视图中为同一行项目设置两个单击侦听器。
要么
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