Popup Menu和Context menu有些类似,都是指定某个view弹出菜单,但Context Menu需要长按,用户体验较差。Popup Menu使用自定义方式启动,比如单击启动,用户体验会更换。
实现原理很简单,在某个view上添加单击监听事件,触发显示Popup Menu菜单,然后监听菜单的点击事件,做出处理。
效果如下:
代码如下:
public class PopupMenuActivity extends Activity {
private static final String TAG = "PopupMenuActivity";
private Context context;
private View view;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_popup_menu);
context = PopupMenuActivity.this;
view = (View) findViewById(R.id.view);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showPopupMenu(v);
}
});
}
private void showPopupMenu(View view) {
PopupMenu popup = new PopupMenu(context, view, Gravity.CENTER_HORIZONTAL);
popup.getMenuInflater().inflate(R.menu.menu_popup_menu, popup.getMenu());
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.action_settings:
Log.d(TAG, "onMenuItemClick action_settings");
return true;
case R.id.action_test:
Log.d(TAG, "onMenuItemClick action_test");
return true;
}
return false;
}
});
popup.show();
}
}
这里使用的是xml定义的菜单,也很简单:
<menu 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"
tools:context="com.example.hornsey.myapplication.Demo.PopupMenuActivity">
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:title="@string/action_settings"
app:showAsAction="never" />
<item
android:id="@+id/action_test"
android:orderInCategory="101"
android:title="@string/hello_world"
app:showAsAction="never" />
</menu>