单击其他菜单项时,如何在操作栏上获取菜单项ID

Question

所以我在动作栏上有菜单项.在onOptionsItemSelected上,我想更改菜单项图像.

这是我的代码

    @Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle presses on the action bar items
    switch (item.getItemId()) {
    case R.id.todaySched:{
        viewTodaySched();
        item.setIcon(R.drawable.calendarselected);
        infoLog=(MenuItem)findViewById(R.id.infoLog);
        infoLog.setIcon(R.drawable.book);

        return true;}
    case R.id.infoLog:{
        viewInfoLog();
        item.setIcon(R.drawable.bookselected);
                    todaySched=(MenuItem)findViewById(R.id.todaySched);
        todaySched.setIcon(R.drawable.calenderselected);
        return true;}
    default:
        return super.onOptionsItemSelected(item);
    }
}

但是当我点击它时图标不会改变,我得到了运行时错误.例如:当我点击todaySched图标时,好像我无法获取infoLog项目ID.

我的LogCat:LogCat

Answer 1

根据你的logcat,你得到了类强制转换异常,你已经使用了sharlockactionbar.所以请尝试检查您是否导入了正确的MenuItem和Menu,它们应该是这样的:

import com.actionbarsherlock.view.MenuItem;
and
import com.actionbarsherlock.view.Menu; 

代替

import android.view.MenuItem;
and
import android.view.Menu;

编辑:

以下是只需单击一下即可更改两个图标的方法:

  private Menu menu;
private MenuItem item1, item2;
Boolean original = true;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    getSupportMenuInflater().inflate(R.menu.menu, menu);

    this.menu = menu;
    return true;

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    int id = item.getItemId();

    if (id == R.id.todaySched) {
        update();

    } else if (id == R.id.infoLog) {

        update();
    }

    return true;

}

private void update() {

    item1 = menu.findItem(R.id.todaySched);
    item2 = menu.findItem(R.id.infoLog);

    if (original) {
        item1.setIcon(getResources().getDrawable(
                android.R.drawable.ic_menu_search));
        item2.setIcon(getResources().getDrawable(
                android.R.drawable.ic_menu_report_image));
        original = false;
    } else if (!original) {

        item1.setIcon(getResources().getDrawable(
                android.R.drawable.ic_menu_my_calendar));
        item2.setIcon(getResources().getDrawable(
                android.R.drawable.ic_menu_info_details));
        original = true;
    }

}

检查并正在工作.现在根据您的要求使用它..

干杯....