【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
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2022-04-07 08:13:42
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备份短信和添加短信
网络图片查看器
使用HttpURLConnection采用Post方式请求数据
操作系统短信的uri: content://sms/
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 smsList = new ArrayList(); 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 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
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
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 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.
* * 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.
* * 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
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