android中如何向系统中添加联系人数据

Question

以下是我的代码，但是总是添加的时候程序会崩溃，也没有错误的日志，麻烦哪位大神帮忙一下
ContentValues values = new ContentValues();

//先向RawContact.CONTENT_URI执行一个控制插入，目的是获得系统返回的rawContacctId

Uri rawContactUri = this.getApplicationContext().getContentResolver() .insert(ContactsContract.RawContacts.CONTENT_URI, values);

long rawContactId = ContentUris.parseId(rawContactUri);

//往data表里写入姓名数据

values.clear(); values.put(ContactsContract.Data.RAW_CONTACT_ID, rawContactId); values.put(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE); //内容类型 values.put(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME, information[0]); this.getApplicationContext().getContentResolver().insert(android.provider.ContactsContract.Data.CONTENT_URI, values);

Answer 1

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在Android中向系统中添加联系人数据，可以使用ContentProvider的方式。下面是一个基本的例子：

public class ContactProvider extends ContentProvider {

    private static final String CONTENT_AUTHORITY = "com.example.android.contacts";

    private static final String DATABASE_NAME = "contacts.db";
    private static final int DATABASE_VERSION = 1;

    private static final Uri CONTENT_URI = Uri.parse("content://" + CONTENT_AUTHORITY + "/");

    @Override
    public boolean onCreate() {
        return true;
    }

    @Nullable
    @Override
    public Cursor query(@NonNull Uri uri, @NonNull String[] projection, @Nullable String selection,
                        @Nullable String[] selectionArgs, @Nullable String sortOrder) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Nullable
    @Override
    public String getType(@NonNull Uri uri) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Nullable
    @Override
    public Uri insert(@NonNull Uri uri, @Nullable ContentValues values) {
        if (isExternalStorageDocument(uri)) {
            return insertFiles(uri, values);
        }
        if (isDownloadsDocument(uri)) {
            return insertDownloadFile(uri, values);
        }
        if (isMediaDocument(uri)) {
            return insertMediaFile(uri, values);
        }
        if (uri.getLastPathSegment().equals("_rels")) {
            return insertRels(uri, values);
        }
        return null;
    }

    private Uri insertFiles(Uri uri, ContentValues values) {
        // Add the file to the media store with a unique name
        String filePath = getFilePathFromUri(uri);
        File contactFile = new File(filePath);
        if (!contactFile.exists()) {
            throw new FileNotFoundException();
        }
        return super.insert(uri, values);
    }

    private Uri insertDownloadFile(Uri uri, ContentValues values) {
        // Add the downloaded file to the media store with a unique name
        String downloadPath = getFilePathFromUri(uri);
        File contactFile = new File(downloadPath);
        if (!contactFile.exists()) {
            throw new FileNotFoundException();
        }
        return super.insert(uri, values);
    }

    private Uri insertMediaFile(Uri uri, ContentValues values) {
        // Add the downloaded file to the media store with a unique name
        String mediaPath = getFilePathFromUri(uri);
        File contactFile = new File(mediaPath);
        if (!contactFile.exists()) {
            throw new FileNotFoundException();
        }
        return super.insert(uri, values);
    }

    private Uri insertRels(Uri uri, ContentValues values) {
        // Add the downloaded file to the media store with a unique name
        String relsPath = getFilePathFromUri(uri);
        File contactFile = new File(relsPath);
        if (!contactFile.exists()) {
            throw new FileNotFoundException();
        }
        return super.insert(uri, values);
    }

    /**
     * Returns whether or not the given URI is for an external storage location.
     */
    private boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * Returns whether or not the given URI is for a download.
     */
    private boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * Returns whether or not the given URI is for a media document.
     */
    private boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    private String getFilePathFromUri(Uri uri) {
        String filePath;
        if ("_rels".equals(uri.getLastPathSegment())) {
            filePath = uri.getPath().substring(0, uri.getPath().lastIndexOf('/'));
        } else {
            filePath = uri.getPath();
        }
        return filePath;
    }

}

在这个例子中，我们创建了一个名为ContactProvider的ContentProvider类，它继承自ContentProvider。然后我们在onCreate方法中重写了createCursor, getType和insert方法。

• onCreate方法被重写为返回true，以表示这个ContentProvider可以用于创建新的数据库。
• query方法被重写为抛出异常，因为我们不支持查询操作。
• insert方法被重写为处理不同的URI（文件、下载或媒体）并返回正确的Uri。