public void saveFormality() { 
        try { 
            ContentValues values = new ContentValues(); 
            values.put(Data.DATA1, this.getFormality() ? "1" : "0"); 
            int mod = ctx.getContentResolver().update( 
                    Data.CONTENT_URI, 
                    values, 
                    Data.CONTACT_ID + "=" + this.getId() + " AND " 
                            + Data.MIMETYPE + "= '" 
                            + clsContacts.FORMALITY_MIMETYPE + "'", null); 
 
            if (mod == 0) { 
                values.put(Data.CONTACT_ID, this.getId()); 
                values.put(Data.MIMETYPE, clsContacts.FORMALITY_MIMETYPE); 
                ctx.getContentResolver().insert(Data.CONTENT_URI, values); 
            } 
        } catch (Exception e) { 
            Log.v(TAG(), "saveFormality failed"); 
        } 
    } 
 
public boolean getFormality() { 
     if (data.containsKey(FORMALITY)) { 
        return data.getAsBoolean(FORMALITY); 
    } else { 
        // read formality 
        Cursor c = readDataWithMimeType(clsContacts.MIMETYPE_FORMALITY, this.getId()); 
        if (c != null) { 
            try { 
                if (c.moveToFirst()) { 
                    this.setFormality(c.getInt(0) == 1); 
                    return (c.getInt(0) == 1); 
                } 
            } finally { 
                c.close(); 
            } 
        } 
        return false; 
    } 
 
} 

 上面的是添加了一个boolean在联系人中，2.1以上适用

String where = ContactsContract.CommonDataKinds.GroupMembership.GROUP_ROW_ID + "=" 
                + groupid + " AND " 
                + ContactsContract.CommonDataKinds.GroupMembership.MIMETYPE + "='" 
                + ContactsContract.CommonDataKinds.GroupMembership.CONTENT_ITEM_TYPE + "'"; 
 
        Cursor c = this.ctx.getContentResolver().query( 
                ContactsContract.Data.CONTENT_URI, 
                new String[] { 
                        ContactsContract.CommonDataKinds.GroupMembership.RAW_CONTACT_ID, 
                        ContactsContract.Data.DISPLAY_NAME 
                }, where, null, ContactsContract.Data.DISPLAY_NAME + " COLLATE LOCALIZED ASC"); 

 do { 
    if (c.getLong(groupIdx) == id) { 
        Cursor ccur = ctx.getContentResolver().query( Phone.CONTENT_URI, 
            new String[] {Phone.NUMBER, Phone.TYPE, 
            Phone.DISPLAY_NAME }, 
            Phone.CONTACT_ID +"="+ contactId,  
                  null, null);  
        Log.e("Test: Number", ccur.getString(0)) 
        Log.e("Test: Name", ccur.getString(2)) 
    } 
} while (c.moveToNext()); 

1.ImageView.setImageUri(Uri.fromFile(new File("/sdcard/cats.jpg"))); 
ImageView.setImageUri(Uri.parse(new File("/sdcard/cats.jpg").toString())); 

2.String url = "http://almondmendoza.com/android-applications/"; 
Intent i = new Intent(Intent.ACTION_VIEW); 
i.setData(Uri.parse(url)); 
startActivity(i);