Android4.0 -- UI控件之 Menu 菜单的的使用(四)

2) 程序实现

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item
android:id="@+id/share"
android:orderInCategory="100"
android:showAsAction="never"
android:title="Share"/>
<item
android:id="@+id/edit"
android:orderInCategory="100"
android:showAsAction="never"
android:title="Edit"/>
<item
android:id="@+id/delete"
android:orderInCategory="100"
android:showAsAction="never"
android:title="Delete"/>

</menu>

public class MainActivity extends Activity {

private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initComponent();
//这种就不需要长按事件
button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//当前这个v就是 button2控件
PopupMenu popupMenu = new PopupMenu(MainActivity.this, v);
popupMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() {

@Override
public boolean onMenuItemClick(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.edit:
Toast.makeText(MainActivity.this, "Edit", 3).show();
break;
case R.id.share:
Toast.makeText(MainActivity.this, "share", 3).show();
break;
case R.id.delete:
Toast.makeText(MainActivity.this, "delete", 3).show();
break;
}
return false;
}
});

MenuInflater inflater = popupMenu.getMenuInflater();
inflater.inflate(R.menu.main, popupMenu.getMenu());
popupMenu.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.main, menu);
return true;
}

private void initComponent(){
button = (Button)findViewById(R.id.button1);
}

}

3) 执行结果