Android：查询和添加联系人 - 黑马程序员技术交流社区

package com.ysh.contacts;
import android.app.Activity;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
private void printCursor(Cursor cursor) {
if(cursor != null && cursor.getCount() > 0) {
while(cursor.moveToNext()) {
int columnCount = cursor.getColumnCount(); // 列的总数
for (int i = 0; i < columnCount; i++) {
String columnName = cursor.getColumnName(i); // 取对应i位置的列的名称
String columnValue = cursor.getString(i); // 取出对应i位置的列的值
}
}
cursor.close();
}
}
/**
* 查询联系人
* @param v
*/
public void queryContacts(View v) {
// 1. 去raw_contacts表中取所有联系人的_id
Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
Uri dataUri = Uri.parse("content://com.android.contacts/data");
Cursor cursor = getContentResolver().query(uri, new String[]{"_id"}, null, null, null);
if(cursor != null && cursor.getCount() > 0) {
while(cursor.moveToNext()) {
int id = cursor.getInt(0);
// 2. 去data表中根据上面取到的_id查询对应id的数据.
String selection = "raw_contact_id = ?";
String[] selectionArgs = {String.valueOf(id)};
Cursor c = getContentResolver().query(dataUri, new String[]{"data1", "mimetype"},
selection, selectionArgs, null);
if(c != null && c.getCount() > 0) {
while(c.moveToNext()) {
String mimetype = c.getString(1); // 当前取的是mimetype的值
String data1 = c.getString(0); // 当前取的是data1数据
if("vnd.android.cursor.item/phone_v2".equals(mimetype)) {
Log.i(TAG, "号码: " + data1);
} else if("vnd.android.cursor.item/name".equals(mimetype)) {
Log.i(TAG, "姓名: " + data1);
} else if("vnd.android.cursor.item/email_v2".equals(mimetype)) {
Log.i(TAG, "邮箱: " + data1);
}
}
c.close();
}
}
cursor.close();
}
}
/**
* 添加联系人
* @param v
*/
public void addContacts(View v) {
Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
Uri dataUri = Uri.parse("content://com.android.contacts/data");
// 1. 在raw_contacts表中添加一个记录
// 取raw_contacts表中contact_id的值
Cursor cursor = getContentResolver().query(uri, new String[]{"contact_id"}, null, null, "contact_id desc limit 1");
if(cursor != null && cursor.moveToFirst()) {
int contact_id = cursor.getInt(0);
contact_id ++;
cursor.close();
ContentValues values = new ContentValues();
values.put("contact_id", contact_id);
getContentResolver().insert(uri, values);
// 2. 根据上面添加记录的id, 取data表中添加三条数据
// 存号码
values = new ContentValues();
values.put("mimetype", "vnd.android.cursor.item/phone_v2");
values.put("data1", "10086");
values.put("raw_contact_id", contact_id);
getContentResolver().insert(dataUri, values);
// 存姓名
values = new ContentValues();
values.put("mimetype", "vnd.android.cursor.item/name");
values.put("data1", "中国移动");
values.put("raw_contact_id", contact_id);
getContentResolver().insert(dataUri, values);
// 存姓名
values = new ContentValues();
values.put("mimetype", "vnd.android.cursor.item/email_v2");
values.put("data1", "10086@kengni.com");
values.put("raw_contact_id", contact_id);
getContentResolver().insert(dataUri, values);
}
}
}

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