Question

我创建了一个包含我的联系人的列表视图......

tab_contact_list.xml ，包含listview：

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/tab_contact_list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1" />

</LinearLayout>

listview_detail_tab_contact_list.xml ，详细列出了listview的行：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >


    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:src="@drawable/defaultavatar" />

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >


        <TextView
            android:id="@+id/contact_name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="5dp"
            android:text="Who am I"
            android:textAppearance="?android:attr/textAppearanceLarge" />


        <TextView
            android:id="@+id/contact_number"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:text="000000000" />

    </LinearLayout> 

</LinearLayout>

defaultavatar.png 位于文件夹 drawable

而且，我有一些课程：

public class ContactStock {

    private String name;
    private String number;

    public ContactStock(String name, String number) {
        this.name = name;
        this.number = number;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setNumber(String number) {
        this.number = number;
    }

    public String getName() {
        return this.name;
    }

    public String getNumber() {
        return this.number;
    }

}

public class ContactListAdapter extends ArrayAdapter {
    private final Activity activity;
    private final List stocks;

    public ContactListAdapter(Activity activity, List objects) {
        super(activity, R.layout.listview_detail_tab_contact_list, objects);
        this.activity = activity;
        this.stocks = objects;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View rowView = convertView;
        ContactStockView sv = null;
        if (rowView == null) {
            // Get a new instance of the row layout view
            LayoutInflater inflater = activity.getLayoutInflater();
            rowView = inflater.inflate(
                    R.layout.listview_detail_tab_contact_list, null);

            // Hold the view objects in an object,
            // so they don't need to be re-fetched
            sv = new ContactStockView();
            sv.name = (TextView) rowView.findViewById(R.id.contact_name);

            sv.number = (TextView) rowView.findViewById(R.id.contact_number);

            // Cache the view objects in the tag,
            // so they can be re-accessed later
            rowView.setTag(sv);
        } else {
            sv = (ContactStockView) rowView.getTag();
        }
        // Transfer the stock data from the data object
        // to the view objects
        ContactStock currentStock = (ContactStock) stocks.get(position);
        sv.name.setText(currentStock.getName());
        sv.number.setText(currentStock.getNumber());

        // TODO Auto-generated method stub
        return rowView;
    }

    protected static class ContactStockView {
        protected TextView name;
        protected TextView number;
    }
}

我有课程显示listview：

public class addlistfromcontact extends Activity {
    private ListView lst;
    private List<ContactStock> contactstock;
    private Cursor mCursor;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tab_contact_list);
        lst = (ListView) findViewById(R.id.tab_contact_list);
        contactstock = new ArrayList<ContactStock>();

        mCursor = managedQuery(ContactsContract.Data.CONTENT_URI, null, Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'", null,
                ContactsContract.Data.DISPLAY_NAME + " ASC");
        int number = mCursor.getColumnIndex(Phone.NUMBER);      
        int name = mCursor.getColumnIndex(ContactsContract.Data.DISPLAY_NAME);
        while (mCursor.moveToNext()) {
            String phName = mCursor.getString(name);
            String phNumber = mCursor.getString(number);
            contactstock.add(new ContactStock(phName, phNumber));
        }
        lst.setAdapter(new ContactListAdapter(addlistfromcontact.this,
                contactstock));
    }

}

我的结果如下：

Listview results

现在我如何显示每个联系人的图片而不是defaultavatar.png？

Answer 1

尝试使用您的模型来保存图片..

public class ContactStock {

    private Bitmap picture;

    // your current code goes here       

    public void setPicture(Bitmap picture) {
        this.picture = picture;
    }

    public Bitmap getPicture() {
        return picture;
    }
}

确保在ArrayAdapter中实现getPicture（）方法，你只在那里使用你的名字和数字对象，在xml中你已经有了imageview的行，只需将它添加到ArrayAdapter ......所以如何你得到位图？这对我有用......

public Bitmap loadContactPhoto(ContentResolver cr, long id) { 
    Uri uri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, id); 
    InputStream input = ContactsContract.Contacts.openContactPhotoInputStream(cr, uri); 
    if (input == null) { 
return null; 
    } 
    return BitmapFactory.decodeStream(input); 
}

StackOverflow成员“wrongmissle”在这里发布了这个。 How do I load a contact Photo? 谢谢你的错误。既然您已经可以获取联系人的姓名和号码，只需提取ID，使用ContentResolver将其插入到该方法中，该方法返回一个可以放在列表中的位图！希望有所帮助。

Answer 2

上述答案可能会给您错误......以下是100％正常工作的代码

Uri uri = Uri.parse(url);
                             Bitmap bitmap = null;
                            try {
                                bitmap = MediaStore.Images.Media.getBitmap(contexts.getContentResolver(), uri);
                            } catch (FileNotFoundException e) {
                                // TODO Auto-generated catch block
                                bitmap = null;
                                e.printStackTrace();
                            } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                                bitmap = null;
                            }


                            if(bitmap != null)
                                friend.setImageURI(uri);
                            else
                                friend.setImageResource(R.drawable.avatar_photo);

ImageView是朋友。

Answer 3

首先你需要向ContactStock类添加一个位图，这将保存联系人照片。

将适配器类的末尾更改为以下代码：

        ContactStock currentStock = (ContactStock) stocks.get(position);
        sv.name.setText(currentStock.getName());
        sv.number.setText(currentStock.getNumber());
        sv.image.setImageBitmap(currentStock.getPicture());


        // TODO Auto-generated method stub
        return rowView;
    }

    protected static class ContactStockView {
        protected TextView name;
        protected TextView number;
        protected ImageView image;
    }

到主要活动（AddlistFromContact）添加以下功能：

public Bitmap getPhoto(long userId ) {
        Uri photoUri = null;
        ContentResolver cr = this.getContentResolver();
        photoUri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, userId);
        Bitmap defaultPhoto = BitmapFactory.decodeResource(getResources(), R.drawable.contacts);
        if (photoUri != null) {
            InputStream input = ContactsContract.Contacts.openContactPhotoInputStream(
                    cr, photoUri);
            if (input != null) {
                return BitmapFactory.decodeStream(input);
            }
        } else {

            return defaultPhoto;
        }

        return defaultPhoto;
    }

现在您需要做的就是在您定义光标之后将这两行添加到onCreate()函数中：



    int id=mCursor.getColumnIndex(Phone.CONTACT_ID);
    long phId=mCursor.getLong(id);

以下列方式致电contactStock的constractur：

contactstock.add(new ContactStock(phName, phNumber,getPhoto(phId)));

希望我帮助

Answer 4

我相信你错了。在

long phId=mCursor.getLong(id);

应该是while循环的一部分。

将联系人的图片加载到列表视图而不是默认值？

4 个答案: