小编ham*_*djj的帖子

我正在使用arrayadapter作为我的listview,我想在其中使用DownloadManager.但是数组适配器不知道这一行:

DownloadManager download =(DownloadManager) getSystemService(DOWNLOAD_SERVICE);

那么我怎么能使用这个我的适配器类,当用户触摸图像下载开始

我的适配器类:

public class MyAdapter extends ArrayAdapter<String>{

    private final Context context;
    private final String[] values;
    Context b;

    public MyAdapter(Context context, String[] values) {
        super(context, R.layout.item, values);
        this.context = context;
        this.values = values;
        b= (Context) context;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);       
        View rootview = inflater.inflate(R.layout.item, parent, false);

        TextView tv1 = (TextView)rootview.findViewById(R.id.txt_name);
        TextView tv2 = (TextView)rootview.findViewById(R.id.txt_numer);
        ImageView img = (ImageView) rootview.findViewById(R.id.imageView1);

        MyDatabase MyDatabase = …

我正在使用AnimationDrawable进行下载进度吧我将动画放入getview,它运行正常.但是当我滚动列表时,动画已被停止.在AnimationDrawable中有任何方法来解决这个问题.喜欢Dialog中的setCancelable.

请帮帮我...谢谢

ImageView anim = (ImageView) rootview.findViewById(R.id.imageView2);
AnimationDrawable animation = (AnimationDrawable) anim.getDrawable();
animation.start();

截图:

我正在使用CursorAdapter在listview中读取数据库.我在列表的每个项目中都有一个复选框,当用户选中复选框时,我的数据库中的收藏列会更改是,并且项目会添加到收藏夹中.

一切都很好,最喜欢的列已更改,但当我在列表中向上和向下滚动时,复选框将取消选中.如果您重新启动应用程序,则复选框已被选中

我该怎么办这个问题:

对不起,我的英语不好:

CursorAdapter类:

public class MyAdapter extends CursorAdapter {

    Context b;   
    LayoutInflater inflater;
    @SuppressWarnings("deprecation")
    public MyAdapter(Context context, Cursor c) {
        super(context, c);
        inflater = LayoutInflater.from(context);
        b= (Context) context;
    }

    @SuppressWarnings("unused")
    @Override
    public void bindView(View view, Context context, final Cursor cursor) {
        // TODO Auto-generated method stub

        TextView tv1 = (TextView)view.findViewById(R.id.txt_name);
        TextView tv2 = (TextView)view.findViewById(R.id.txt_numer);

        tv1.setText(cursor.getString(2));
        tv2.setText(cursor.getString(3));

        final int pos = cursor.getPosition();

        final CheckBox repeatChkBx = (CheckBox)view.findViewById(R.id.favorite_check);

        String me = cursor.getString(cursor.getColumnIndex("like"));

        if (me.equals("yes")) {
            repeatChkBx.setChecked(true);
        } else {
            repeatChkBx.setChecked(false); …

运行使用SqliteAssetHelper库的项目时出现此错误:

FATAL EXCEPTION: main
android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 24
at android.database.AbstractCursor.checkPosition(AbstractCursor.java:424)
at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)

这个错误是什么意思？

我读过这篇文章

但我无法解决我的问题.我在listview中使用CursorAdapter.

我在列表的每个项目中都有一个复选框.如果选中了复选框并向上和向下滚动.该复选框将被禁用.我无法解决它.请帮我.

@Override
public void bindView(View view, Context context, final Cursor cursor) {

    TextView tv1 = (TextView)view.findViewById(R.id.txt_name);
    TextView tv2 = (TextView)view.findViewById(R.id.txt_numer);

    tv1.setText(cursor.getString(2));
    tv2.setText(cursor.getString(3));

    final int pos = cursor.getPosition();

    final CheckBox repeatChkBx = (CheckBox)view.findViewById(R.id.favorite_check);

    String likes = cursor.getString(cursor.getColumnIndex("like"));

    if (likes.equals("yes")) {
        repeatChkBx.setChecked(true);
    } else {
        repeatChkBx.setChecked(false);
    }

    repeatChkBx.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View view) {
            MyDatabase mydatabase = new MyDatabase(b);
            SQLiteDatabase mydb = mydatabase.getWritableDatabase();
            cursor.moveToPosition(pos);

            if (repeatChkBx.isChecked()) {
                ContentValues cv = new ContentValues();
                cv.put("like", "yes");
                mydb.update("list", cv, "id …