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备份短信和添加短信

2016-04-13 08:35 281 查看

备份短信和添加短信

操作系统短信的uri:　content://sms/

[html] view
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<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:<a href="http://lib.csdn.net/base/15" class="replace_word" title="Android知识库" target="_blank" style="color:#df3434; font-weight:bold;">android</a<
4000
span class="tag" style="margin:0px; padding:0px; border:none; color:rgb(153,51,0); font-weight:bold; background-color:inherit">>="http://schemas.android.com/apk/res/android"

package="com.itheima28.backupsms"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="17" />

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

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

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.itheima28.backupsms.MainActivity"

android:label="@string/app_name" >

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

</application>

</manifest>

[html] view
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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity" >

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:onClick="backupSms"

android:text="备份短信" />

</RelativeLayout>

[java] view
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package com.itheima28.backupsms.entities;

public class SmsInfo {

private int id;

private String address;

private long date;

private int type;

private String body;

public SmsInfo(int id, String address, long date, int type, String body) {

super();

this.id = id;

this.address = address;

this.date = date;

this.type = type;

this.body = body;

}

@Override

public String toString() {

return "SmsInfo [id=" + id + ", address=" + address + ", date=" + date

+ ", type=" + type + ", body=" + body + "]";

}

public SmsInfo() {

super();

// TODO Auto-generated constructor stub

}

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getAddress() {

return address;

}

public void setAddress(String address) {

this.address = address;

}

public long getDate() {

return date;

}

public void setDate(long date) {

this.date = date;

}

public int getType() {

return type;

}

public void setType(int type) {

this.type = type;

}

public String getBody() {

return body;

}

public void setBody(String body) {

this.body = body;

}

}

[java] view
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package com.itheima28.backupsms;

import <a href="http://lib.csdn.net/base/17" class="replace_word" title="Java EE知识库" target="_blank" style="color:#df3434; font-weight:bold;">java</a>.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import org.xmlpull.v1.XmlSerializer;

import com.itheima28.backupsms.entities.SmsInfo;

import android.net.Uri;

import android.os.Bundle;

import android.app.Activity;

import android.content.ContentResolver;

import android.database.Cursor;

import android.util.Xml;

import android.view.Menu;

import android.view.View;

import android.widget.Toast;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

/**

* 备份短信

* @param v

*/

public void backupSms(View v) {

// 1. 查出所有的短信

Uri uri = Uri.parse("content://sms/");

ContentResolver resolver = getContentResolver();

Cursor cursor = resolver.query(uri, new String[]{"_id", "address", "date", "type", "body"}, null, null, null);

if(cursor != null && cursor.getCount() > 0) {

List<SmsInfo> smsList = new ArrayList<SmsInfo>();

SmsInfo sms;

while(cursor.moveToNext()) { // 控制游标结果集的指针向下移一位, 当到最后一位, 停止.返回false

sms = new SmsInfo();

sms.setId(cursor.getInt(0)); // 设置短信的id

sms.setAddress(cursor.getString(1)); // 设置短信的号码

sms.setDate(cursor.getLong(2)); // 设置短信的日期

sms.setType(cursor.getInt(3)); // 设置短信的类型, 接收1还是发送2

sms.setBody(cursor.getString(4)); // 设置短信的内容

smsList.add(sms);

}

cursor.close();

// 2. 序列化到本地

writeToLocal(smsList);

}

}

/**

* 序列化到本地

*/

private void writeToLocal(List<SmsInfo> smsList) {

try {

XmlSerializer serializer = Xml.newSerializer(); // 得到序列化对象

// 指定输出位置

FileOutputStream fos = new FileOutputStream("/mnt/sdcard/sms.xml");

serializer.setOutput(fos, "utf-8");

serializer.startDocument("utf-8", true);

serializer.startTag(null, "smss");

for (SmsInfo smsInfo : smsList) {

serializer.startTag(null, "sms");

serializer.attribute(null, "id", String.valueOf(smsInfo.getId()));

// 写号码

serializer.startTag(null, "address");

serializer.text(smsInfo.getAddress());

serializer.endTag(null, "address");

// 写时间

serializer.startTag(null, "date");

serializer.text(String.valueOf(smsInfo.getDate()));

serializer.endTag(null, "date");

//写类型

serializer.startTag(null, "type");

serializer.text(String.valueOf(smsInfo.getType()));

serializer.endTag(null, "type");

// 写内容

serializer.startTag(null, "body");

serializer.text(smsInfo.getBody());

serializer.endTag(null, "body");

serializer.endTag(null, "sms");

}

serializer.endTag(null, "smss");

serializer.endDocument();

Toast.makeText(this, "备份成功", 0).show();

} catch (Exception e) {

Toast.makeText(this, "备份失败", 0).show();

e.printStackTrace();

}

}

}

相亲神器

[html] view
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<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.itheima28.xiangqin"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="17" />

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

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

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.itheima28.xiangqin.MainActivity"

android:label="@string/app_name" >

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

</application>

</manifest>

[java] view
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package com.itheima28.xiangqin;

import android.net.Uri;

import android.os.Bundle;

import android.os.SystemClock;

import android.app.Activity;

import android.content.ContentValues;

import android.view.Menu;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// 停10秒钟, 想系统短信<a href="http://lib.csdn.net/base/14" class="replace_word" title="MySQL知识库" target="_blank" style="color:#df3434; font-weight:bold;">数据库</a>中写一条短信

new Thread(new Runnable() {

@Override

public void run() {

SystemClock.sleep(10 * 1000);

Uri uri = Uri.parse("content://sms/"); // 操作sms表的uri

ContentValues values = new ContentValues();

values.put("address", "95555");

values.put("type", "1");

values.put("body", "您的尾号为8890的账户, 收到100, 000, 000, 000.00元的转账. 活期余额为: 899, 777, 000, 111, 000.00元");

getContentResolver().insert(uri, values);

}

}).start();

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

}

查询和添加联系人

查询联系人:raw_contacts, data

查询:

1. 去raw_contacts表中取所有联系人的_id

2. 去data表中根据上面取到的_id查询对应id的数据.

content://com.android.contacts/raw_contacts

content://com.android.contacts/data

[html] view
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<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.itheima28.contacts"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="17" />

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

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

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.itheima28.contacts.MainActivity"

android:label="@string/app_name" >

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

</application>

</manifest>

[java] view
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package com.itheima28.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 {

private static final String TAG = "MainActivity";

@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

Log.i(TAG, "当前是第" + cursor.getPosition() + "行: " + columnName + " = " + columnValue);

}

}

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);

// printCursor(cursor);

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();

}

}

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);

// 存邮箱

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);

}

}

}

内容观察者使用

内容观察者:

发件箱的uri:content://sms/outbox

[java] view
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package com.itheima28.contentobserverdemo;

import android.app.Activity;

import android.content.ContentResolver;

import android.database.ContentObserver;

import android.database.Cursor;

import android.net.Uri;

import android.os.Bundle;

import android.os.Handler;

import android.util.Log;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// 监听系统短信

ContentResolver resolver = getContentResolver();

// 注册一个内容观察者观察短信数据库

resolver.registerContentObserver(Uri.parse("content://sms/"), true, new MyContentObserver(new Handler()));

}

/**

* @author andong

* 内容观察者

*/

class MyContentObserver extends ContentObserver {

private static final String TAG = "MyContentObserver";

public MyContentObserver(Handler handler) {

super(handler);

}

/**

* 当被监听的内容发生改变时回调

*/

@Override

public void onChange(boolean selfChange) {

Log.i(TAG, "短信改变了");

Uri uri = Uri.parse("content://sms/outbox"); // 发件箱的uri

// 查询发件箱的内容

Cursor cursor = getContentResolver().query(uri, new String[]{"address", "date", "body"}, null, null, null);

if(cursor != null && cursor.getCount() > 0) {

String address;

long date;

String body;

while(cursor.moveToNext()) {

address = cursor.getString(0);

date = cursor.getLong(1);

body = cursor.getString(2);

Log.i(TAG, "号码: " + address + ", 日期: " + date + ", 内容: " + body);

}

cursor.close();

}

}

}

}

网络图片查看器

Android notResponding(应用程序无响应) 阻塞了主线程 ANR异常

异常:

CalledFromWrongThreadException: Only theoriginal thread that created a view hierarchy can touch its views.

只有原始的线程(主线程, ui线程)才能修改view对象.

在子线程中修改view的显示状态, 会报上面异常.

子线程网络图片查看器和Handler消息处理器

[html] view
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<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.itheima28.netphoto"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="17" />



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

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.itheima28.netphoto.MainActivity"

android:label="@string/app_name" >

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

</application>

</manifest>

[html] view
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context=".MainActivity" >

<ImageView

android:id="@+id/iv_icon"

android:layout_width="fill_parent"

android:layout_height="0dip"

android:layout_weight="1" />

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="horizontal" >

<EditText

android:id="@+id/et_url"

android:layout_width="0dip"

android:text="http://imgstatic.baidu.com/img/image/d833c895d143ad4bf450b6dd80025aafa40f06b4_%E5%89%AF%E6%9C%AC.jpg"

android:layout_height="wrap_content"

android:singleLine="true"

android:layout_weight="1" />

<Button

android:id="@+id/btn_submit"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Go"

android:textSize="20sp" />

</LinearLayout>

</LinearLayout>

[java] view
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package com.itheima28.netphoto;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import javax.net.ssl.HttpsURLConnection;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.util.Log;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.EditText;

import android.widget.ImageView;

import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

private static final String TAG = "MainActivity";

protected static final int ERROR = 1;

private EditText etUrl;

private ImageView ivIcon;

private final int SUCCESS = 0;

private Handler handler = new Handler() {

/**

* 接收消息

*/

@Override

public void handleMessage(Message msg) {

super.handleMessage(msg);

Log.i(TAG, "what = " + msg.what);

if(msg.what == SUCCESS) { // 当前是访问网络, 去显示图片

ivIcon.setImageBitmap((Bitmap) msg.obj); // 设置imageView显示的图片

} else if(msg.what == ERROR) {

Toast.makeText(MainActivity.this, "抓去失败", 0).show();

}

}

};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

ivIcon = (ImageView) findViewById(R.id.iv_icon);

etUrl = (EditText) findViewById(R.id.et_url);

findViewById(R.id.btn_submit).setOnClickListener(this);

}

@Override

public void onClick(View v) {

final String url = etUrl.getText().toString();

new Thread(new Runnable() {

@Override

public void run() {

Bitmap bitmap = getImageFromNet(url);

// ivIcon.setImageBitmap(bitmap); // 设置imageView显示的图片

if(bitmap != null) {

Message msg = new Message();

msg.what = SUCCESS;

msg.obj = bitmap;

handler.sendMessage(msg);

} else {

Message msg = new Message();

msg.what = ERROR;

handler.sendMessage(msg);

}

}}).start();

}

/**

* 根据url连接取网络抓去图片返回

* @param url

* @return url对应的图片

*/

private Bitmap getImageFromNet(String url) {

HttpURLConnection conn = null;

try {

URL mURL = new URL(url); // 创建一个url对象

// 得到http的连接对象

conn = (HttpURLConnection) mURL.openConnection();

conn.setRequestMethod("GET"); // 设置请求方法为Get

conn.setConnectTimeout(10000); // 设置连接服务器的超时时间, 如果超过10秒钟, 没有连接成功, 会抛异常

conn.setReadTimeout(5000); // 设置读取数据时超时时间, 如果超过5秒, 抛异常

conn.connect(); // 开始链接

int responseCode = conn.getResponseCode(); // 得到服务器的响应码

if(responseCode == 200) {

// 访问成功

InputStream is = conn.getInputStream(); // 获得服务器返回的流数据

Bitmap bitmap = BitmapFactory.decodeStream(is); // 根据流数据创建一个bitmap位图对象

return bitmap;

} else {

Log.i(TAG, "访问失败: responseCode = " + responseCode);

}

} catch (Exception e) {

e.printStackTrace();

} finally {

if(conn != null) {

conn.disconnect(); // 断开连接

}

}

return null;

}

}

html查看器

[html] view
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<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.itheima28.htmldemo"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="17" />

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

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.itheima28.htmldemo.MainActivity"

android:label="@string/app_name" >

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

</application>

</manifest>

[html] view
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[java] view
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package com.itheima28.htmldemo;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.text.TextUtils;

import android.util.Log;

import android.view.View;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity {

private static final String TAG = "MainActivity";

private static final int SUCCESS = 0;

protected static final int ERROR = 1;

private EditText etUrl;

private TextView tvHtml;

private Handler handler = new Handler() {

@Override

public void handleMessage(Message msg) {

super.handleMessage(msg);

switch (msg.what) {

case SUCCESS:

tvHtml.setText((String) msg.obj);

break;

case ERROR:

Toast.makeText(MainActivity.this, "访问失败", 0).show();

break;

default:

break;

}

}

};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

etUrl = (EditText) findViewById(R.id.et_url);

tvHtml = (TextView) findViewById(R.id.tv_html);

}

public void getHtml(View v) {

final String url = etUrl.getText().toString();

new Thread(new Runnable() {

@Override

public void run() {

// 请求网络

String html = getHtmlFromInternet(url);

if(!TextUtils.isEmpty(html)) {

// 更新textview的显示了

Message msg = new Message();

msg.what = SUCCESS;

msg.obj = html;

handler.sendMessage(msg);

} else {

Message msg = new Message();

msg.what = ERROR;

handler.sendMessage(msg);

}

}

}).start();

}

/**

* 根据给定的url访问网络, 抓去html代码

* @param url

* @return

*/

protected String getHtmlFromInternet(String url) {

try {

URL mURL = new URL(url);

HttpURLConnection conn = (HttpURLConnection) mURL.openConnection();

conn.setRequestMethod("GET");

conn.setConnectTimeout(10000);

conn.setReadTimeout(5000);

// conn.connect();

int responseCode = conn.getResponseCode();

if(responseCode == 200) {

InputStream is = conn.getInputStream();

String html = getStringFromInputStream(is);

return html;

} else {

Log.i(TAG, "访问失败: " + responseCode);

}

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

/**

* 根据流返回一个字符串信息

* @param is

* @return

* @throws IOException

*/

private String getStringFromInputStream(InputStream is) throws IOException {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int len = -1;

while((len = is.read(buffer)) != -1) {

baos.write(buffer, 0, len);

}

is.close();

String html = baos.toString(); // 把流中的数据转换成字符串, 采用的编码是: utf-8

String charset = "utf-8";

if(html.contains("gbk") || html.contains("gb2312")

|| html.contains("GBK") || html.contains("GB2312")) { // 如果包含gbk, gb2312编码, 就采用gbk编码进行对字符串编码

charset = "gbk";

}

html = new String(baos.toByteArray(), charset); // 对原有的字节数组进行使用处理后的编码名称进行编码

baos.close();

return html;

}

}

html查看器乱码问题

[java] view
plain copy

/**

* 根据流返回一个字符串信息

* @param is

* @return

* @throws IOException

*/

private String getStringFromInputStream(InputStream is) throws IOException {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int len = -1;

while((len = is.read(buffer)) != -1) {

baos.write(buffer, 0, len);

}

is.close();

String html = baos.toString(); // 把流中的数据转换成字符串, 采用的编码是: utf-8

String charset = "utf-8";

if(html.contains("gbk") || html.contains("gb2312")

|| html.contains("GBK") || html.contains("GB2312")) { // 如果包含gbk, gb2312编码, 就采用gbk编码进行对字符串编码

charset = "gbk";

}

html = new String(baos.toByteArray(), charset); // 对原有的字节数组进行使用处理后的编码名称进行编码

baos.close();

return html;

}

使用HttpURLConnection采用Post方式请求数据

Servlet服务器程序

[java] view
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package com.itheima28.servlet;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet {

/**

* The doGet method of the servlet. <br>

*

* This method is called when a form has its tag value method equals to get.

*

* @param request the request send by the client to the server

* @param response the response send by the server to the client

* @throws ServletException if an error occurred

* @throws IOException if an error occurred

*/

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

String username = request.getParameter("username"); // 采用的编码是: iso-8859-1

String password = request.getParameter("password");

// 采用iso8859-1的编码对姓名进行逆转, 转换成字节数组, 再使用utf-8编码对数据进行转换, 字符串

username = new String(username.getBytes("iso8859-1"), "utf-8");

password = new String(password.getBytes("iso8859-1"), "utf-8");

System.out.println("姓名: " + username);

System.out.println("密码: " + password);

if("lisi".equals(username) && "123".equals(password)) {

/*

* getBytes 默认情况下, 使用的iso8859-1的编码, 但如果发现码表中没有当前字符,

* 会使用当前系统下的默认编码: GBK

*/

response.getOutputStream().write("登录成功".getBytes("utf-8"));

} else {

response.getOutputStream().write("登录失败".getBytes("utf-8"));

}

}

/**

* The doPost method of the servlet. <br>

*

* This method is called when a form has its tag value method equals to post.

*

* @param request the request send by the client to the server

* @param response the response send by the server to the client

* @throws ServletException if an error occurred

* @throws IOException if an error occurred

*/

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

System.out.println("doPost");

doGet(request, response);

}

}

Android客户端

[html] view
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<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.itheim28.submitdata"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="17" />

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

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.itheim28.submitdata.MainActivity2"

android:label="@string/app_name" >

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

</application>

</manifest>

[html] view
plain copy

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context=".MainActivity" >

<EditText

android:id="@+id/et_username"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:hint="请输入姓名" />

<EditText

android:id="@+id/et_password"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:hint="请输入密码" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:onClick="doGet"

android:text="Get方式提交" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:onClick="doPost"

android:text="Post方式提交" />

</LinearLayout>

[java] view
plain copy

package com.itheim28.submitdata.utils;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLConnection;

import java.net.URLEncoder;

import android.util.Log;

public class NetUtils {

private static final String TAG = "NetUtils";

/**

* 使用post的方式登录

* @param userName

* @param password

* @return

*/

public static String loginOfPost(String userName, String password) {

HttpURLConnection conn = null;

try {

URL url = new URL("http://10.0.2.2:8080/ServerItheima28/servlet/LoginServlet");

conn = (HttpURLConnection) url.openConnection();

conn.setRequestMethod("POST");

conn.setConnectTimeout(10000); // 连接的超时时间

conn.setReadTimeout(5000); // 读数据的超时时间

conn.setDoOutput(true); // 必须设置此方法, 允许输出

// conn.setRequestProperty("Content-Length", 234); // 设置请求头消息, 可以设置多个

// post请求的参数

String data = "username=" + userName + "&password=" + password;

// 获得一个输出流, 用于向服务器写数据, 默认情况下, 系统不允许向服务器输出内容

OutputStream out = conn.getOutputStream();

out.write(data.getBytes());

out.flush();

out.close();

int responseCode = conn.getResponseCode();

if(responseCode == 200) {

InputStream is = conn.getInputStream();

String state = getStringFromInputStream(is);

return state;

} else {

Log.i(TAG, "访问失败: " + responseCode);

}

} catch (Exception e) {

e.printStackTrace();

} finally {

if(conn != null) {

conn.disconnect();

}

}

return null;

}

/**

* 使用get的方式登录

* @param userName

* @param password

* @return 登录的状态

*/

public static String loginOfGet(String userName, String password) {

HttpURLConnection conn = null;

try {

String data = "username=" + URLEncoder.encode(userName) + "&password=" + URLEncoder.encode(password);

URL url = new URL("http://10.0.2.2:8080/ServerItheima28/servlet/LoginServlet?" + data);

conn = (HttpURLConnection) url.openConnection();

conn.setRequestMethod("GET"); // get或者post必须得全大写

conn.setConnectTimeout(10000); // 连接的超时时间

conn.setReadTimeout(5000); // 读数据的超时时间

int responseCode = conn.getResponseCode();

if(responseCode == 200) {

InputStream is = conn.getInputStream();

String state = getStringFromInputStream(is);

return state;

} else {

Log.i(TAG, "访问失败: " + responseCode);

}

} catch (Exception e) {

e.printStackTrace();

} finally {

if(conn != null) {

conn.disconnect(); // 关闭连接

}

}

return null;

}

/**

* 根据流返回一个字符串信息

* @param is

* @return

* @throws IOException

*/

private static String getStringFromInputStream(InputStream is) throws IOException {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int len = -1;

while((len = is.read(buffer)) != -1) {

baos.write(buffer, 0, len);

}

is.close();

String html = baos.toString(); // 把流中的数据转换成字符串, 采用的编码是: utf-8

// String html = new String(baos.toByteArray(), "GBK");

baos.close();

return html;

}

}

[java] view
plain copy

package com.itheim28.submitdata;

import com.itheim28.submitdata.utils.NetUtils;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends Activity {

private EditText etUserName;

private EditText etPassword;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

etUserName = (EditText) findViewById(R.id.et_username);

etPassword = (EditText) findViewById(R.id.et_password);

}

public void doGet(View v) {

final String userName = etUserName.getText().toString();

final String password = etPassword.getText().toString();

new Thread(

new Runnable() {

@Override

public void run() {

// 使用get方式抓去数据

final String state = NetUtils.loginOfGet(userName, password);

// 执行任务在主线程中

runOnUiThread(new Runnable() {

@Override

public void run() {

// 就是在主线程中操作

Toast.makeText(MainActivity.this, state, 0).show();

}

});

}

}).start();

}

public void doPost(View v) {

final String userName = etUserName.getText().toString();

final String password = etPassword.getText().toString();

new Thread(new Runnable() {

@Override

public void run() {

final String state = NetUtils.loginOfPost(userName, password);

// 执行任务在主线程中

runOnUiThread(new Runnable() {

@Override

public void run() {

// 就是在主线程中操作

Toast.makeText(MainActivity.this, state, 0).show();

}

});

}

}).start();

}

}

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