Android -- ContentProvider， 读取和保存系统 联系人

1. 示例代码

需要的读写联系人的权限

<uses-permission android:name="android.permission.WRITE_CONTACTS"/>
    <uses-permission android:name="android.permission.READ_CONTACTS"/>

读联系人代码

public void click(View view) {
		ContentResolver resolver = getContentResolver();
		// raw_contact 表的uri
		Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
		// data 表的uri
		Uri dataUri = Uri.parse("content://com.android.contacts/data");
		Cursor cursor = resolver.query(uri, new String[] { "contact_id" },
				null, null, null);
		while (cursor.moveToNext()) {
			String id = cursor.getString(0);
			//系统删除联系人的时候不会删除全部db中的信息，只是将id置为 null
			if (id != null) {
				Cursor dataCursor = resolver.query(dataUri, new String[] {
						"data1", "mimetype" }, "raw_contact_id=?",
						new String[] { id }, null);
				while (dataCursor.moveToNext()) {
					String data = dataCursor.getString(0);
					String mimetype = dataCursor.getString(1);
					System.out.println("data:" + data);
					System.out.println("mimetype:" + mimetype);

				}
				dataCursor.close();
				System.out.println("----------");
			}
		}
		cursor.close();
	}

写联系人代码

public void click(View view) {
		String name = et_name.getText().toString().trim();
		String phone = et_phone.getText().toString().trim();
		String email = et_email.getText().toString().trim();

		if (TextUtils.isEmpty(name) || TextUtils.isEmpty(phone)) {
			Toast.makeText(this, "姓名或者电话不能为空", 1).show();
			return;
		}
		// 把数据写入到系统的联系人.
		ContentResolver resolver = this.getContentResolver();
		// ----------在raw_contant表中添加一条新的id---------------
		Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
		// 插入联系人 必须要知道 新的联系人的id
		Cursor cursor = resolver.query(uri, new String[] { "contact_id" },
				null, null, "contact_id");
		int contact_id;
		if (cursor.moveToLast()) {
			contact_id = cursor.getInt(0) + 1; // 数据库里面有数据 最后一条联系人的id + 1
		} else {// 原先数据库是空的 从第一个联系人开始
			contact_id = 1;
		}
		ContentValues values = new ContentValues();
		values.put("contact_id", contact_id);
		resolver.insert(uri, values);
		// -----------------------------

		// ------------在data表里面 添加id对应的数据-------------
		Uri dataUri = Uri.parse("content://com.android.contacts/data");

		// 插入姓名
		ContentValues nameValue = new ContentValues();
		nameValue.put("data1", name);
		nameValue.put("raw_contact_id", contact_id);
		nameValue.put("mimetype", "vnd.android.cursor.item/name");
		resolver.insert(dataUri, nameValue);

		// 插入电话
		ContentValues phoneValue = new ContentValues();
		phoneValue.put("data1", phone);
		phoneValue.put("raw_contact_id", contact_id);
		phoneValue.put("mimetype", "vnd.android.cursor.item/phone_v2");
		resolver.insert(dataUri, phoneValue);

		// 插入邮箱
		if (!TextUtils.isEmpty(email)) {
			ContentValues emailValue = new ContentValues();
			emailValue.put("data1", email);
			emailValue.put("raw_contact_id", contact_id);
			emailValue.put("mimetype", "vnd.android.cursor.item/email_v2");
			resolver.insert(dataUri, emailValue);
		}

		Toast.makeText(this, "插入数据成功", 0).show();
	}