我正在构建一个具有浮动操作按钮的应用程序,可以打开菜单。我希望能够保持菜单的一致性,而不必将其添加到每个活动中。
我认为我可以简单地创建MainActivity并将一个ViewStub放在一个具有id" holder"的LinearLayout中。然后,当单击菜单按钮时,我只是从持有者中删除视图并添加新视图。
这种方法有什么缺陷吗?有关更好方法的任何建议吗?
这是我的主要活动:
public class MainActivity extends AppCompatActivity {
private LinearLayout holder;
private ViewStub viewStub;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
holder = (LinearLayout) findViewById(R.id.holder);
viewStub = (ViewStub) findViewById(R.id.viewStub);
viewStub.setLayoutResource(R.layout.content_main);
viewStub.inflate();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
@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();
switch(id){
case R.id.action_main:
loadLayout(R.layout.content_main);
break;
case R.id.action_secondary:
loadLayout(R.layout.content_secondary);
break;
}
return super.onOptionsItemSelected(item);
}
private void loadLayout(int layout){
holder.removeAllViews();
holder.addView(LayoutInflater.from(this).inflate(layout,holder,false));
}
}
这是我的主要布局,我将内容布局加载到" holder":
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
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:fitsSystemWindows="true"
tools:context="com.example.android.simplepopoutmenu.MainActivity">
<LinearLayout
android:id="@+id/holder"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ViewStub
android:id="@+id/viewStub"
android:inflatedId="@+id/main_layout"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|start"
android:layout_margin="@dimen/fab_margin"
app:srcCompat="@android:drawable/ic_menu_view" />
</android.support.design.widget.CoordinatorLayout>