1、布局界面
- <RelativeLayoutxmlns: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:paddingBottom="@dimen/activity_vertical_margin"
- android:paddingLeft="@dimen/activity_horizontal_margin"
- android:paddingRight="@dimen/activity_horizontal_margin"
- android:paddingTop="@dimen/activity_vertical_margin"
- tools:context=".MainActivity">
- <EditText
- android:id="@+id/url_text"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_alignParentRight="true"
- android:layout_alignParentTop="true"
- android:ems="10"
- android:inputType="textPostalAddress"
- android:text="@string/url_text">
- <requestFocus />
- </EditText>
- <Button
- android:id="@+id/btn_text"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignLeft="@+id/url_text"
- android:layout_below="@+id/url_text"
- android:layout_marginTop="32dp"
- android:onClick="sendHttp"
- android:text="@string/btn_text"/>
- <ImageView
- android:id="@+id/iv_ie"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentBottom="true"
- android:layout_alignParentLeft="true"
- android:layout_alignRight="@+id/url_text"
- android:layout_below="@+id/btn_text"
- android:src="@drawable/ic_launcher"/>
- </RelativeLayout>
- <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"
- android:paddingBottom="@dimen/activity_vertical_margin"
- android:paddingLeft="@dimen/activity_horizontal_margin"
- android:paddingRight="@dimen/activity_horizontal_margin"
- android:paddingTop="@dimen/activity_vertical_margin"
- tools:context=".MainActivity" >
- <EditText
- android:id="@+id/url_text"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentLeft="true"
- android:layout_alignParentRight="true"
- android:layout_alignParentTop="true"
- android:ems="10"
- android:inputType="textPostalAddress"
- android:text="@string/url_text" >
- <requestFocus />
- </EditText>
- <Button
- android:id="@+id/btn_text"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignLeft="@+id/url_text"
- android:layout_below="@+id/url_text"
- android:layout_marginTop="32dp"
- android:onClick="sendHttp"
- android:text="@string/btn_text" />
- <ImageView
- android:id="@+id/iv_ie"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_alignParentBottom="true"
- android:layout_alignParentLeft="true"
- android:layout_alignRight="@+id/url_text"
- android:layout_below="@+id/btn_text"
- android:src="@drawable/ic_launcher" />
- </RelativeLayout>
2、封转的一些类
URL的封装:
- package com.example.lession08_code.utis;
- import java.io.InputStream;
- import java.net.HttpURLConnection;
- import java.net.URL;
- import android.graphics.Bitmap;
- import android.graphics.BitmapFactory;
- public class HttpUtils {
- public static String sendGet(String path){
- String content=null;
- try{
- //设置访问的url
- URL url=new URL(path);
- //打开请求
- HttpURLConnection httpURLConnection=(HttpURLConnection) url.openConnection();
- //设置请求的信息
- httpURLConnection.setRequestMethod("GET");
- //设置请求是否超时
- httpURLConnection.setConnectTimeout(5000);
- //判断服务器是否响应成功
- if(httpURLConnection.getResponseCode()==200){
- //获取响应的输入流对象
- InputStream is=httpURLConnection.getInputStream();
- byte data[]=StreamTools.isTodata(is);
- //把转换成字符串
- content=new String(data);
- //内容编码方式
- if(content.contains("gb2312")){
- content=new String(data,"gb2312");
- }
- }
- //断开连接
- httpURLConnection.disconnect();
- }catch(Exception e){
- e.printStackTrace();
- }
- return content;
- }
- public static Bitmap sendGets(String path){
- Bitmap bitmap=null;
- try{
- //设置访问的url
- URL url=new URL(path);
- //打开请求
- HttpURLConnection httpURLConnection=(HttpURLConnection) url.openConnection();
- //设置请求的信息
- httpURLConnection.setRequestMethod("GET");
- //设置请求是否超时
- httpURLConnection.setConnectTimeout(5000);
- //判断服务器是否响应成功
- if(httpURLConnection.getResponseCode()==200){
- //获取响应的输入流对象
- InputStream is=httpURLConnection.getInputStream();
- //直接把is的流转换成Bitmap对象
- bitmap=BitmapFactory.decodeStream(is);
- }
- //断开连接
- httpURLConnection.disconnect();
- }catch(Exception e){
- e.printStackTrace();
- }
- return bitmap;
- }
- }
- package com.example.lession08_code.utis;
- import java.io.InputStream;
- import java.net.HttpURLConnection;
- import java.net.URL;
- import android.graphics.Bitmap;
- import android.graphics.BitmapFactory;
- public class HttpUtils {
- public static String sendGet(String path){
- String content=null;
- try{
- //设置访问的url
- URL url=new URL(path);
- //打开请求
- HttpURLConnection httpURLConnection=(HttpURLConnection) url.openConnection();
- //设置请求的信息
- httpURLConnection.setRequestMethod("GET");
- //设置请求是否超时
- httpURLConnection.setConnectTimeout(5000);
- //判断服务器是否响应成功
- if(httpURLConnection.getResponseCode()==200){
- //获取响应的输入流对象
- InputStream is=httpURLConnection.getInputStream();
- byte data[]=StreamTools.isTodata(is);
- //把转换成字符串
- content=new String(data);
- //内容编码方式
- if(content.contains("gb2312")){
- content=new String(data,"gb2312");
- }
- }
- //断开连接
- httpURLConnection.disconnect();
- }catch(Exception e){
- e.printStackTrace();
- }
- return content;
- }
- public static Bitmap sendGets(String path){
- Bitmap bitmap=null;
- try{
- //设置访问的url
- URL url=new URL(path);
- //打开请求
- HttpURLConnection httpURLConnection=(HttpURLConnection) url.openConnection();
- //设置请求的信息
- httpURLConnection.setRequestMethod("GET");
- //设置请求是否超时
- httpURLConnection.setConnectTimeout(5000);
- //判断服务器是否响应成功
- if(httpURLConnection.getResponseCode()==200){
- //获取响应的输入流对象
- InputStream is=httpURLConnection.getInputStream();
- //直接把is的流转换成Bitmap对象
- bitmap=BitmapFactory.decodeStream(is);
- }
- //断开连接
- httpURLConnection.disconnect();
- }catch(Exception e){
- e.printStackTrace();
- }
- return bitmap;
- }
- }
判断网络是否连接的封装类
- package com.example.lession08_code.utis;
- import android.app.AlertDialog;
- import android.content.ComponentName;
- import android.content.Context;
- import android.content.DialogInterface;
- import android.content.Intent;
- import android.net.ConnectivityManager;
- import android.net.NetworkInfo;
- import android.widget.Toast;
- public class NetWorkUtils {
- private Context context;
- // 网路链接管理对象
- public ConnectivityManager connectivityManager;
- public NetWorkUtils(Context context) {
- this.context = context;
- // 获取网络链接的对象
- connectivityManager = (ConnectivityManager) context
- .getSystemService(Context.CONNECTIVITY_SERVICE);
- }
- public boolean setActiveNetWork() {
- boolean flag=false;
- // 获取可用的网络链接对象
- NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
- if (networkInfo == null) {
- new AlertDialog.Builder(context)
- .setTitle("网络不可用")
- .setMessage("可以设置网络?")
- .setPositiveButton("确认",
- new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog,
- int which) {
- Toast.makeText(context, "点击确认",
- Toast.LENGTH_LONG).show();
- // 声明意图
- Intent intent = new Intent();
- intent.setAction(Intent.ACTION_MAIN);
- intent.addCategory("android.intent.category.LAUNCHER");
- intent.setComponent(new ComponentName(
- "com.android.settings",
- "com.android.settings.Settings"));
- intent.setFlags(0x10200000);
- // 执行意图
- context.startActivity(intent);
- }
- })
- .setNegativeButton("取消",
- new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog,
- int which) {
- }
- }).show();// 必须.show();
- }
- if(networkInfo!=null){
- flag=true;
- }
- return flag;
- }
- }
- package com.example.lession08_code.utis;
- import android.app.AlertDialog;
- import android.content.ComponentName;
- import android.content.Context;
- import android.content.DialogInterface;
- import android.content.Intent;
- import android.net.ConnectivityManager;
- import android.net.NetworkInfo;
- import android.widget.Toast;
- public class NetWorkUtils {
- private Context context;
- // 网路链接管理对象
- public ConnectivityManager connectivityManager;
- public NetWorkUtils(Context context) {
- this.context = context;
- // 获取网络链接的对象
- connectivityManager = (ConnectivityManager) context
- .getSystemService(Context.CONNECTIVITY_SERVICE);
- }
- public boolean setActiveNetWork() {
- boolean flag=false;
- // 获取可用的网络链接对象
- NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
- if (networkInfo == null) {
- new AlertDialog.Builder(context)
- .setTitle("网络不可用")
- .setMessage("可以设置网络?")
- .setPositiveButton("确认",
- new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog,
- int which) {
- Toast.makeText(context, "点击确认",
- Toast.LENGTH_LONG).show();
- // 声明意图
- Intent intent = new Intent();
- intent.setAction(Intent.ACTION_MAIN);
- intent.addCategory("android.intent.category.LAUNCHER");
- intent.setComponent(new ComponentName(
- "com.android.settings",
- "com.android.settings.Settings"));
- intent.setFlags(0x10200000);
- // 执行意图
- context.startActivity(intent);
- }
- })
- .setNegativeButton("取消",
- new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog,
- int which) {
- }
- }).show();// 必须.show();
- }
- if(networkInfo!=null){
- flag=true;
- }
- return flag;
- }
- }
输出流的封装类
- package com.example.lession08_code.utis;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- public class StreamTools {
- public staticbyte[] isTodata(InputStream is) throws IOException{
- //字节输出流
- ByteArrayOutputStream bops=new ByteArrayOutputStream();
- //读取数据的缓冲区
- byte buffer[]=newbyte[1024];
- //读取记录的长度
- int len=0;
- while((len=is.read(buffer))!=-1){
- bops.write(buffer, 0, len);
- }
- //把读取的内容转换成byte数组
- byte data[]=bops.toByteArray();
- return data;
- }
- }
- package com.example.lession08_code.utis;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- public class StreamTools {
- public static byte[] isTodata(InputStream is) throws IOException{
- //字节输出流
- ByteArrayOutputStream bops=new ByteArrayOutputStream();
- //读取数据的缓冲区
- byte buffer[]=new byte[1024];
- //读取记录的长度
- int len=0;
- while((len=is.read(buffer))!=-1){
- bops.write(buffer, 0, len);
- }
- //把读取的内容转换成byte数组
- byte data[]=bops.toByteArray();
- return data;
- }
- }
注意:在这里还需要加权限问题
- <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
- <uses-permission android:name="android.permission.INTERNET"/>
- <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
- <uses-permission android:name="android.permission.INTERNET"/>