android中導入數據

接著android 中導出數據 一文，下面介紹在android中導入數據的思路：

1、將數據從文本中讀取出來

2、封裝處理成自己想要的對象或模型

3、將處理好的數據對象插入自己應用的數據庫中

4、更新UI顯示

下面仍以導入聯系人至系統中為例，若是導入自己的應用中，思路一樣甚至更簡單，代碼如下：

注：我的聯系人.txt的格式即為android 中導出數據 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;// 導入按鈕
	private TextView show;// 顯示結果的文本框
	private Thread addThread;// 增加聯系人線程
	private static final int ADD_FAIL = 0;// 導入失敗標識
	private static final int ADD_SUCCESS = 1;// 導入成功標識
	private static int successCount = 0;// 導入成功的計數
	private static int failCount = 0;// 導入失敗的計數
	// 默認文件路勁，實際情況應作相應修改或從界面輸入或浏覽選擇
	private static final String PATH = Environment
			.getExternalStorageDirectory() + "/我的聯系人.txt";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		init();
	}

	/**
	 * 初始化組件
	 */
	private void init() {
		btn = (Button) findViewById(R.id.main_btn);
		btn.setOnClickListener(this);
		show = (TextView) findViewById(R.id.main_tv);
	}

	@Override
	public void onClick(View v) {
		if (v == btn) {
			addContact();
		}
	}

	/**
	 * 導入聯系人入口
	 */
	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", "確保你是第一次導入，重復導入會創建新的聯系人，請慎用！");
	}

	/**
	 * 創建提示對話框
	 * 
	 * @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("確定", 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();
	}

	/**
	 * 開啟導入線程
	 */
	private void startAddContact() {
		setAddWidgetEnabled(false);
		show.setText("正在導入聯系人...");
		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;
		}

		@Override
		public void run() {
			boolean result = importContact(context, path);
			if (result) {
				handler.sendEmptyMessage(ADD_SUCCESS);
			} else {
				handler.sendEmptyMessage(ADD_FAIL);
			}
		}
	}

	/**
	 * 處理UI相關的handler
	 */
	private Handler handler = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case ADD_FAIL:
				show.setText("導入聯系人失敗");
				setAddWidgetEnabled(true);
				break;
			case ADD_SUCCESS:
				show.setText(String.format("導入聯系人成功 %d 條，失敗 %d 條",
						successCount, failCount));
				setAddWidgetEnabled(true);
				break;
			}
		}
	};

	/**
	 * 設置導入組件的可用性
	 * 
	 * @param enabled
	 */
	private void setAddWidgetEnabled(boolean enabled) {
		btn.setEnabled(enabled);
		if (!enabled) {
			show.setText("");
		}
	}

	/**
	 * 導入聯系人
	 * 
	 * @param context
	 * @param path
	 * @return
	 */
	private boolean importContact(Context context, String path) {
		successCount = 0;
		failCount = 0;
		try {
			ArrayList 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;
	}

	/**
	 * 讀取聯系人並封裝成ContactInfo對象集合
	 * 
	 * @param path
	 * @return contactsList
	 */
	private ArrayList readFromFile(String path) {
		ArrayList strsList = doReadFile(path);
		if (strsList == null) {
			return null;
		}
		ArrayList contactsList = handleReadStrs(strsList);
		return contactsList;
	}

	/**
	 * 將讀出來的內容封裝成ContactInfo對象集合
	 * 
	 * @param strsList
	 * @return
	 */
	private ArrayList handleReadStrs(ArrayList strsList) {
		ArrayList contactsList = new ArrayList();
		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 >= 3
				displayName = infos[0];
				mobileNum = infos[1];
				homeNum = infos[2];
			}
			if (displayName == null || "".equals(displayName)) {
				failCount++;
				continue;
			}
			contactsList.add(new ContactInfo(displayName, mobileNum, homeNum));
		}
		return contactsList;
	}

	/**
	 * 讀取文件內容
	 * 
	 * @param path
	 * @return
	 */
	private ArrayList doReadFile(String path) {
		FileInputStream in = null;
		ArrayList arrayList = new ArrayList();
		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;
	}

	/**
	 * 向數據庫表插入聯系人信息
	 * 
	 * @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;
				// 檢查是否是英文名稱
				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) {
				// 插入手機電話
				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) {
				// 插入家庭號碼
				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;
	}

	/**
	 * 檢查是否是英文名稱
	 * 
	 * @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;
	}
}

聯系人實體類ContactInfo：

package com.home.impcontact;

public class ContactInfo {
	/** 名稱 */
	private String displayName;
	/** 手機號 */
	private String mobileNum;
	/** 家庭電話 */
	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：

權限：