Android之弹出菜单框【注册上下文菜单】

注册上下文菜单：（长按弹出一个菜单）


第一种创建方法（与长按事件结合）：


public class MainActivity extends Activity {
private TextView username,password;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
username = (TextView) findViewById(R.id.username);
password = (TextView) findViewById(R.id.password);


username.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {


@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
menu.add("file");
menu.add("edit");
menu.add("source");


}
});




}
@Override
public boolean onContextItemSelected(MenuItem item) {
// TODO Auto-generated method stub
//当菜单上下文元素被选中时执行
Toast.makeText(this, item.getTitle()+"onContextItemSelected", 1).show();
return super.onContextItemSelected(item);
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
// TODO Auto-generated method stub
//菜单元素被选中时执行
Toast.makeText(this, item.getTitle()+"onMenuItemSelected", 1).show();
return super.onMenuItemSelected(featureId, item);
}
}






第二种方法：
（注册上下文菜单）




public class MainActivity extends Activity {
private TextView username,password;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
username = (TextView) findViewById(R.id.username);
password = (TextView) findViewById(R.id.password);


this.registerForContextMenu(username);//注册菜单
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
menu.add("file");
menu.add("edit");
super.onCreateContextMenu(menu, v, menuInfo);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
// TODO Auto-generated method stub
//当菜单上下文元素被选中时执行
Toast.makeText(this, item.getTitle()+"onContextItemSelected", 1).show();
return super.onContextItemSelected(item);
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
// TODO Auto-generated method stub
//菜单元素被选中时执行
Toast.makeText(this, item.getTitle()+"onMenuItemSelected", 1).show();
return super.onMenuItemSelected(featureId, item);
}
}