有谁知道如何创建某种下拉或弹出页面,以便我可以从我所在的页面转到任何页面?
例如我有一个菜单页面,但当我选择一个选项时,我希望能够导航到另一个页面而不是返回菜单
public class PopUpMenu extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.popupmenu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.location:
Intent intent1 = new Intent(getApplicationContext(), MyLocation.class);
startActivity(intent1);
return true;
case R.id.search:
Intent intent2 = new Intent(getApplicationContext(), Search.class);
startActivity(intent2);
return true;
case R.id.add:
Intent intent3 = new Intent(getApplicationContext(), AddSite.class);
startActivity(intent3);
return true;
// case R.id.help:
// Intent intent4 = new Intent(getApplicationContext(), Help.class);
// startActivity(intent4);
// return true;
case R.id.exit:
Intent intent5 = new Intent(Intent.ACTION_MAIN);
intent5.addCategory(Intent.CATEGORY_HOME);
intent5.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent5);
default:
return super.onOptionsItemSelected(item);
}
}
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/location" android:title="My Location" />
<item android:id="@+id/search" android:title="Search" />
<item android:id="@+id/add" android:title="Add Site" />
<item android:id="@+id/help" android:title="Help" />
<item android:id="@+id/exit" android:title="Exit" />
</menu>
答案 0 :(得分:2)
首先,这是一个很好的教程:Activity Testing
您在developers.android网站上有几个示例 最全面的是API Demos,其中包括广泛的工具和技术。
然后,为了您的目的,窗口小部件名为Spinner,其演示版为Spinner Test。
答案 1 :(得分:1)
菜单(XML格式):
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/food" android:title="Food" />
<item android:id="@+id/other" android:title="Other" />
</menu>
设置菜单:
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.mymenu, menu);
return true;
}
处理转换活动:
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.food:
Intent intent1 = new Intent(getContext(), Food.class);
startActivity(intent1);
return true;
case R.id.other:
Intent intent2 = new Intent(getContext(), Other.class);
startActivity(intent2);
return true;
default:
return super.onOptionsItemSelected(item);
}
}