【黑马Android】(05)短信/查询和添加/内容观察者使用/子线程网络图片查看器和Handler消息处理器/html查看器/使用HttpURLConnection采用Post方式请求数据/开源项目_html/css_WEB-ITnose

备份短信和添加短信

操作系统短信的uri:　content://sms/

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="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-sdk>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>    <uses-permission android:name="android.permission.READ_SMS"></uses-permission>    <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"></action>                <category android:name="android.intent.category.LAUNCHER"></category>            </intent-filter>        </activity>    </application></manifest>

<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"></button></relativelayout>

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;	}}

package com.itheima28.backupsms;import java.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();		}			}}</smsinfo></smsinfo></smsinfo>

相亲神器

<?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-sdk>    <uses-permission android:name="android.permission.WRITE_SMS"></uses-permission>    <uses-permission android:name="android.permission.READ_SMS"></uses-permission>    <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"></action>                <category android:name="android.intent.category.LAUNCHER"></category>            </intent-filter>        </activity>    </application></manifest>

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, 想系统短信数据库中写一条短信		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

<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">    <button android:onclick="queryContacts" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="查询所有联系人"></button>    <button android:onclick="addContacts" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="添加联系人"></button></linearlayout>

<?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-sdk>    <uses-permission android:name="android.permission.READ_CONTACTS"></uses-permission>    <uses-permission android:name="android.permission.WRITE_CONTACTS"></uses-permission>    <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"></action>                <category android:name="android.intent.category.LAUNCHER"></category>            </intent-filter>        </activity>    </application></manifest>

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  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

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

<?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-sdk><!--     访问网络的权限 -->    <uses-permission android:name="android.permission.INTERNET"></uses-permission>    <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"></action>                <category android:name="android.intent.category.LAUNCHER"></category>            </intent-filter>        </activity>    </application></manifest>

<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"></imageview>    <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"></edittext>        <button android:id="@+id/btn_submit" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Go" android:textsize="20sp"></button>    </linearlayout></linearlayout>

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

<?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-sdk>    <uses-permission android:name="android.permission.INTERNET"></uses-permission>    <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"></action>                <category android:name="android.intent.category.LAUNCHER"></category>            </intent-filter>        </activity>    </application></manifest>

<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">    <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://www.baidu.com" android:layout_height="wrap_content" android:singleline="true" android:layout_weight="1"></edittext>        <button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onclick="getHtml" android:text="GO"></button>    </linearlayout>    <scrollview android:layout_width="fill_parent" android:layout_height="fill_parent">        <textview android:id="@+id/tv_html" android:layout_width="fill_parent" android:layout_height="fill_parent"></textview>    </scrollview></linearlayout>

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

	/**	 * 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

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

<?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-sdk>    <uses-permission android:name="android.permission.INTERNET"></uses-permission>    <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"></action>                <category android:name="android.intent.category.LAUNCHER"></category>            </intent-filter>        </activity>    </application></manifest>

<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>    <edittext android:id="@+id/et_password" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="请输入密码"></edittext>    <button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onclick="doGet" android:text="Get方式提交"></button>    <button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onclick="doPost" android:text="Post方式提交"></button></linearlayout>

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;	}}

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();	}}

开源项目简介

github.com 开源网站, 一个大的仓库. 存放的都是框架

android-async-http-master.zip

android-smart-image-view-master.zip

 

直接拿来用 最火的android开源项目  csdn的帖子