android中导入数据

接着android 中导出数据一文，下面介绍在android中导入数据的思路：

1、将数据从文本中读取出来

2、封装处理成自己想要的对象或模型

3、将处理好的数据对象插入自己应用的数据库中

4、更新UI显示

下面仍以导入联系人至系统中为例，若是导入自己的应用中，思路一样甚至更简单，代码如下：

注：我的联系人.txt的格式即为android 中导出数据一文生成的格式

MainActivity：

package com.home.impcontact;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.util.ArrayList;import android.app.Activity;import android.app.AlertDialog;import android.content.ContentUris;import android.content.ContentValues;import android.content.Context;import android.content.DialogInterface;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.provider.ContactsContract;import android.provider.ContactsContract.RawContacts;import android.provider.ContactsContract.CommonDataKinds.Phone;import android.provider.ContactsContract.CommonDataKinds.StructuredName;import android.provider.ContactsContract.Contacts.Data;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener {private Button btn;// 导入按钮private TextView show;// 显示结果的文本框private Thread addThread;// 增加联系人线程private static final int ADD_FAIL = 0;// 导入失败标识private static final int ADD_SUCCESS = 1;// 导入成功标识private static int successCount = 0;// 导入成功的计数private static int failCount = 0;// 导入失败的计数// 默认文件路劲，实际情况应作相应修改或从界面输入或浏览选择private static final String PATH = Environment.getExternalStorageDirectory() + "/我的联系人.txt";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);init();}/** * 初始化组件 */private void init() {btn = (Button) findViewById(R.id.main_btn);btn.setOnClickListener(this);show = (TextView) findViewById(R.id.main_tv);}@Overridepublic void onClick(View v) {if (v == btn) {addContact();}}/** * 导入联系人入口 */private void addContact() {if (!new File(PATH).exists()) {Toast.makeText(this, "文件不存在!", Toast.LENGTH_SHORT).show();show.setText("文件不存在!");return;}if (addThread != null) {addThread.interrupt();addThread = null;}addThread = new Thread(new AddRunnable(this, PATH));createDialog(this, "警告", "确保你是第一次导入，重复导入会创建新的联系人，请慎用！");}/** * 创建提示对话框 *  * @param context * @param title * @param message */private void createDialog(Context context, String title, String message) {AlertDialog.Builder builder = new AlertDialog.Builder(context);builder.setTitle(title);builder.setMessage(message);builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int whichButton) {startAddContact();}});builder.setNeutralButton("取消", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int whichButton) {dialog.cancel();}});builder.show();}/** * 开启导入线程 */private void startAddContact() {setAddWidgetEnabled(false);show.setText("正在导入联系人...");if (addThread != null) {addThread.start();}}class AddRunnable implements Runnable {private Context context;private String path;public AddRunnable(Context context, String path) {this.path = path;this.context = context;}@Overridepublic void run() {boolean result = importContact(context, path);if (result) {handler.sendEmptyMessage(ADD_SUCCESS);} else {handler.sendEmptyMessage(ADD_FAIL);}}}/** * 处理UI相关的handler */private Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case ADD_FAIL:show.setText("导入联系人失败");setAddWidgetEnabled(true);break;case ADD_SUCCESS:show.setText(String.format("导入联系人成功 %d 条，失败 %d 条",successCount, failCount));setAddWidgetEnabled(true);break;}}};/** * 设置导入组件的可用性 *  * @param enabled */private void setAddWidgetEnabled(boolean enabled) {btn.setEnabled(enabled);if (!enabled) {show.setText("");}}/** * 导入联系人 *  * @param context * @param path * @return */private boolean importContact(Context context, String path) {successCount = 0;failCount = 0;try {ArrayList<ContactInfo> list = readFromFile(path);if (list == null) {return false;}for (int i = 0; i < list.size(); i++) {ContactInfo info = list.get(i);if (doAddContact(context, info)) {successCount++;}}} catch (Exception e) {e.printStackTrace();return false;}return true;}/** * 读取联系人并封装成ContactInfo对象集合 *  * @param path * @return contactsList */private ArrayList<ContactInfo> readFromFile(String path) {ArrayList<String> strsList = doReadFile(path);if (strsList == null) {return null;}ArrayList<ContactInfo> contactsList = handleReadStrs(strsList);return contactsList;}/** * 将读出来的内容封装成ContactInfo对象集合 *  * @param strsList * @return */private ArrayList<ContactInfo> handleReadStrs(ArrayList<String> strsList) {ArrayList<ContactInfo> contactsList = new ArrayList<ContactInfo>();for (int i = 0; i < strsList.size(); i++) {String info = strsList.get(i);String[] infos = info.split("\\s{2,}");String displayName = null;String mobileNum = null;String homeNum = null;switch (infos.length) {case 0:continue;case 1:displayName = infos[0];break;case 2:displayName = infos[0];if (infos[1].length() >= 11) {mobileNum = infos[1];} else {homeNum = infos[1];}break;default:// length >= 3displayName = infos[0];mobileNum = infos[1];homeNum = infos[2];}if (displayName == null || "".equals(displayName)) {failCount++;continue;}contactsList.add(new ContactInfo(displayName, mobileNum, homeNum));}return contactsList;}/** * 读取文件内容 *  * @param path * @return */private ArrayList<String> doReadFile(String path) {FileInputStream in = null;ArrayList<String> arrayList = new ArrayList<String>();try {byte[] tempbytes = new byte[1 << 24];in = new FileInputStream(path);while (in.read(tempbytes) != -1) {int length = 0;int first = length;for (int i = 0; i < tempbytes.length; i++) {if (tempbytes[i] == '\n') {length = i;byte[] nowBytes = new byte[length - first];System.arraycopy(tempbytes, first, nowBytes, 0, length- first);arrayList.add(new String(nowBytes, "utf-8").trim());first = i + 1;}}}} catch (Exception e1) {return null;} finally {if (in != null) {try {in.close();} catch (IOException e1) {return null;}}}return arrayList;}/** * 向数据库表插入联系人信息 *  * @param context * @param contactInfo * @return */private boolean doAddContact(Context context, ContactInfo contactInfo) {try {ContentValues contentValues = new ContentValues();Uri uri = context.getContentResolver().insert(RawContacts.CONTENT_URI, contentValues);long rowId = ContentUris.parseId(uri);String name = contactInfo.getDisplayName();String mobileNum = contactInfo.getMobileNum();String homeNum = contactInfo.getHomeNum();// 插入姓名if (name != null) {contentValues.clear();contentValues.put(Data.RAW_CONTACT_ID, rowId);contentValues.put(Data.MIMETYPE,StructuredName.CONTENT_ITEM_TYPE);int index = name.length() / 2;String displayName = name;String givenName = null;String familyName = null;// 检查是否是英文名称if (checkEnglishName(displayName) == false) {givenName = name.substring(index);familyName = name.substring(0, index);} else {givenName = familyName = displayName;}contentValues.put(StructuredName.DISPLAY_NAME, displayName);contentValues.put(StructuredName.GIVEN_NAME, givenName);contentValues.put(StructuredName.FAMILY_NAME, familyName);context.getContentResolver().insert(ContactsContract.Data.CONTENT_URI, contentValues);}if (mobileNum != null) {// 插入手机电话contentValues.clear();contentValues.put(Data.RAW_CONTACT_ID, rowId);contentValues.put(Data.MIMETYPE, Phone.CONTENT_ITEM_TYPE);contentValues.put(Phone.NUMBER, mobileNum);contentValues.put(Phone.TYPE, Phone.TYPE_MOBILE);context.getContentResolver().insert(ContactsContract.Data.CONTENT_URI, contentValues);}if (homeNum != null) {// 插入家庭号码contentValues.clear();contentValues.put(Data.RAW_CONTACT_ID, rowId);contentValues.put(Data.MIMETYPE, Phone.CONTENT_ITEM_TYPE);contentValues.put(Phone.NUMBER, homeNum);contentValues.put(Phone.TYPE, Phone.TYPE_HOME);context.getContentResolver().insert(ContactsContract.Data.CONTENT_URI, contentValues);}} catch (Exception e) {return false;}return true;}/** * 检查是否是英文名称 *  * @param name * @return */private boolean checkEnglishName(String name) {char[] nameChars = name.toCharArray();for (int i = 0; i < nameChars.length; i++) {if ((nameChars[i] >= 'a' && nameChars[i] <= 'z')|| (nameChars[i] >= 'A' && nameChars[i] <= 'Z')) {continue;}return false;}return true;}}

联系人实体类ContactInfo：

package com.home.impcontact;public class ContactInfo {/** 名称 */private String displayName;/** 手机号 */private String mobileNum;/** 家庭电话 */private String homeNum;public ContactInfo(String displayName, String mobileNum, String homeNum) {this.displayName = displayName;this.mobileNum = mobileNum;this.homeNum = homeNum;}public String getDisplayName() {return displayName;}public String getMobileNum() {return mobileNum;}public String getHomeNum() {return homeNum;}}

布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <Button        android:id="@+id/main_btn"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="导入联系人" />    <TextView        android:id="@+id/main_tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

权限：

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

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