小编use*_*981的帖子

我正在尝试在列表导航模式下实现Android Action Bar,它在从列表中选择项目时成功更改了片段,但片段重叠,我可以看到前一个片段的内容仍然在屏幕上,当第二个是选择.这是Activity的OnCreate和OnNavigationItemSelected的代码:

public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    mFirstFragment = new FirstFragment();
    mSecondFragment = new SecondFragment();

    SpinnerAdapter mSpinnerAdapter = ArrayAdapter.createFromResource(
            this, 
            R.array.action_list, 
            android.R.layout.simple_spinner_dropdown_item);

    mActionBar = getActionBar();
    mActionBar.setDisplayShowTitleEnabled(false);
    mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
    mActionBar.setListNavigationCallbacks(mSpinnerAdapter, this);

    if(savedInstanceState != null) {
        mActionBar.setSelectedNavigationItem(
                savedInstanceState.getInt("currFragment"));
    }
}

public boolean onNavigationItemSelected(int position, long itemId) {
    FragmentTransaction mFragmentTransaction = 
            getFragmentManager().beginTransaction();

    switch(position) {
        case FIRST_FRAGMENT:
            mFragmentTransaction.replace(
                    android.R.id.content, 
                    mFirstFragment);
            break;
        case SECOND_FRAGMENT:
            mFragmentTransaction.replace(
                    android.R.id.content, 
                    mSecondFragment);
            break;
    }
    mFragmentTransaction.commit();

    return true;
}

提前致谢!

我有一个Android应用程序,它使用FTS4虚拟表在SQLite数据库中搜索数据.它工作正常,但当表中的数据包含特殊字符(如'á','é','í','ó','ú'或'ñ')时,SQLite MATCH函数不会产生任何结果.我此时迷路了.谢谢.

我想实现一个自定义SimpleCursorAdapter,它只在偶数行上显示背景颜色(在我的情况下为蓝色).我的实现如下:

public class ColoredCursorAdapter extends SimpleCursorAdapter {
    String backgroundColor;

    public ColoredCursorAdapter(
            Context context,
            int layout,
            String backgroundColor,
            Cursor c,
            String[] from,
            int[] to,
            int flags) {
        super(
                context, 
                layout, 
                c, 
                from, 
                to, 
                flags);
        this.backgroundColor = backgroundColor;
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
        super.bindView(view, context, cursor);
        if(cursor.getPosition() % 2 == 0) {
            view.setBackgroundColor(
                    Color.parseColor(backgroundColor));
        }
    }
}

它在开始时工作正常,但是当我反复向下滚动列表时,所有行都变为蓝色.

提前致谢.