我制作的第一个 Android 布局有点问题。在我的界面上,我的界面顶部有一个 EditText,下面有一个 ListView,展示了一个元素列表。当用户触摸 ListView 时,我希望 EditText 失去焦点并且虚拟键盘消失。我基于这个页面http://developer.android.com/guide/topics/ui/ui-events.html。
问题是,虽然我的代码这样做了,但它也阻止了与 ListView 本身的任何其他形式的交互(无法在 ListView 中导航或选择元素)。有没有办法与我添加的行为一起重新建立默认行为?
这是我的 MainActivity.java:
public class MainActivity extends Activity {
// Variable declarations
EditText ed;
ListView lv;
// Function called when the application starts
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Elements declaration
ed = (EditText) findViewById(R.id.search_text);
lv = (ListView) findViewById(R.id.media_list);
// Events declaration
lv.setOnTouchListener(listViewListener);
// We create a task to load the media list in a different thread.
DownloadMediaList task = (DownloadMediaList) new DownloadMediaList (MainActivity.this,new TheInterface() {
@Override
public void theMethod(ArrayList<Media> result) {
lv.setAdapter(new MediathequeListAdapter(MainActivity.this, result));
}
}).execute();
}
private OnTouchListener listViewListener = new OnTouchListener() {
public boolean onTouch(View v, MotionEvent motion){
ed.clearFocus();
InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(ed.getWindowToken(), 0);
return true;
}
};
// Interface to communicate with the async load.
public interface TheInterface {
public void theMethod(ArrayList<Media> result);
}
}
编辑:如果有帮助,这是我的主要布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:descendantFocusability="beforeDescendants"
android:focusableInTouchMode="true" >
<LinearLayout android:id="@+id/container_search"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:paddingLeft="5dp"
android:paddingRight="5dp">
<EditText android:id="@+id/search_text"
android:inputType="text"
android:hint="@string/search_bar"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.80" />
<Button android:id="@+id/search_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.20" />
</LinearLayout>
<ListView
android:id="@+id/media_list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:dividerHeight="1dp" />
</LinearLayout>