Android的Http通信加载页面、下载图片 以及doGet、doPost请求服务器
*********************************通过HttpUrl通信加载百度页面*********************************
activity_main.xml
<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="com.example.androidhttpdemo.MainActivity" >
<WebView
android:id="@+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="168dp" />
</RelativeLayout>
package com.example.androidhttpdemo;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import android.os.Handler;
import android.webkit.WebView;
public class HttpThread extends Thread {
private String url;
private WebView webView;
private Handler handler;
public HttpThread(String url, WebView webView, Handler handler) {
super();
this.url = url;
this.webView = webView;
this.handler = handler;
}
@Override
public void run() {
super.run();
try {
URL httpUrl = new URL(url);
HttpURLConnection connection = (HttpURLConnection) httpUrl
.openConnection();
connection.setReadTimeout(5000);
connection.setRequestMethod("GET");
// 缓冲
final StringBuffer buffer = new StringBuffer();
// 包装流
BufferedReader reader = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String string;
while ((string = reader.readLine()) != null) {
buffer.append(string);
}
/**
* 发送消息
*/
handler.post(new Runnable() {
@Override
public void run() {
//加载信息
webView.loadData(buffer.toString(),
"text/html;charset=utf-8", null);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
MainActivity
package com.example.androidhttpdemo;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebBackForwardList;
import android.webkit.WebView;
import android.widget.ImageView;
public class MainActivity extends Activity {
private WebView webView;
private Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
webView =(WebView) findViewById(R.id.webView);
new HttpThread("http://www.baidu.com", webView, handler).start();
}
}
<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="com.example.androidhttpdemo.MainActivity" >
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="124dp"
android:layout_marginTop="158dp"
android:src="@drawable/ic_launcher" />
</RelativeLayout>HttpThread
package com.example.androidhttpdemo;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
import android.os.Handler;
import android.widget.ImageView;
public class HttpThread extends Thread {
private String url;
private ImageView imageView;
private Handler handler;
public HttpThread(String url, ImageView imageView, Handler handler) {
super();
this.url = url;
this.imageView = imageView;
this.handler = handler;
}
@Override
public void run() {
super.run();
try {
URL httpUrl = new URL(url);
HttpURLConnection connection = (HttpURLConnection) httpUrl
.openConnection();
connection.setReadTimeout(5000);
connection.setRequestMethod("GET");
connection.setDoInput(true);
connection.setDoOutput(true);
// 得到可以读取文件的输入流
InputStream in = connection.getInputStream();
FileOutputStream out = null;
File downLoadFile = null;
// 文件目录
String fileName = String.valueOf(System.currentTimeMillis());
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
// sd卡目录
File parent = Environment.getExternalStorageDirectory();
downLoadFile = new File(parent, fileName);
out = new FileOutputStream(downLoadFile);
}
byte[] b = new byte[1024];
int len;
if (out != null) {
while ((len = in.read(b)) != -1) {
out.write(b, 0, len);
}
}
final Bitmap bitmap = BitmapFactory.decodeFile(downLoadFile
.getAbsolutePath());
;
handler.post(new Runnable() {
@Override
public void run() {
// 更新主线程
imageView.setImageBitmap(bitmap);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
package com.example.androidhttpdemo;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.widget.ImageView;
public class MainActivity extends Activity {
private ImageView imageView;
private Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = (ImageView) findViewById(R.id.imageView);
new HttpThread("网上图片地址", imageView, handler).start();
}
}
******************************************************请求服务器doGet doPost( 代码没有测试)*****************************************
<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="com.example.androidhttpdemo.MainActivity" >
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="21dp"
android:text="nama" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="66dp"
android:layout_toLeftOf="@+id/editText1"
android:text="age" />
<EditText
android:id="@+id/et_age"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/textView1"
android:layout_centerHorizontal="true"
android:ems="10" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView1"
android:layout_marginTop="52dp"
android:layout_toRightOf="@+id/textView1"
android:text="Button" />
<EditText
android:id="@+id/et_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/textView2"
android:layout_alignLeft="@+id/et_age"
android:ems="10" />
</RelativeLayout>MainActivity
package com.example.androidhttpdemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
private EditText age;
private EditText name;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
age = (EditText) findViewById(R.id.et_age);
name = (EditText) findViewById(R.id.et_name);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String url = "http://192.168.1.102:8080/web/MyServlet";
new HttpThread(url, name.getText().toString(), age.getText()
.toString()).start();
}
});
}
}
HttpThread
package com.example.androidhttpdemo;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
import android.os.Handler;
import android.util.Log;
import android.widget.ImageView;
public class HttpThread extends Thread {
private String url;
private String name;
private String age;
public HttpThread(String url, String name, String age) {
super();
this.url = url;
this.name = name;
this.age = age;
}
private void doGet() {
// doGet方式，传递url,显示出来
try {
url = url + "?name=" + URLEncoder.encode(name, "utf-8") + "&age="
+ age;
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
try {
URL httpUrl = new URL(url);
HttpURLConnection connection = (HttpURLConnection) httpUrl
.openConnection();
connection.setReadTimeout(5000);
connection.setRequestMethod("GET");
BufferedReader reader = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String str;
StringBuffer sb = new StringBuffer();
while ((str = reader.readLine()) != null) {
sb.append(str);
}
// 将服务器返回的数据打印出来
Log.e("TAG", "" + sb.toString());
} catch (Exception e) {
}
}
private void doPost() {
URL httpUrl = null;
try {
try {
httpUrl = new URL(url);
HttpURLConnection connection = (HttpURLConnection) httpUrl
.openConnection();
connection.setReadTimeout(5000);
connection.setRequestMethod("POST");
OutputStream out = connection.getOutputStream();
// 发送的实体数据，是通过outPut发送的,post不用转码，android默认utf-8编码的
String content = "name=" + name + "&age=" + age;
out.write(content.getBytes());
/**
* 接受服务器数据
*/
BufferedReader reader = new BufferedReader(
new InputStreamReader(connection.getInputStream()));
StringBuffer sb = new StringBuffer();
String str;
while ((str = reader.readLine()) != null) {
sb.append(str);
}
Log.e("TAG", "" + sb.toString());
} catch (IOException e) {
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void run() {
super.run();
doGet();
doPost();
}
}
*******************************************httpClient**(代码没有测试)******************************************
布局不变
MainActivity
package com.example.androidhttpdemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
private EditText age;
private EditText name;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
age = (EditText) findViewById(R.id.et_age);
name = (EditText) findViewById(R.id.et_name);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String url = "http://192.168.1.102:8080/web/MyServlet";
url = url + "?name=" + name.getText().toString() + "&age="
+ age.getText().toString();
//get方法
new HttpClientThread(url).start();
//post方法
new HttpClientThread(url, name.getText().toString(), age
.getText().toString()).start();
}
});
}
}
package com.example.androidhttpdemo;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
import android.os.Handler;
import android.util.Log;
import android.widget.ImageView;
public class HttpClientThread extends Thread {
private String url;
private String name;
private String age;
public HttpClientThread(String url) {
super();
this.url = url;
}
public HttpClientThread(String url, String name, String age) {
super();
this.url = url;
this.name = name;
this.age = age;
}
private void doHttpClientPost() {
HttpPost httpPost = new HttpPost(url);
// 获取对象
HttpClient client = new DefaultHttpClient();
ArrayList<NameValuePair> list = new ArrayList<NameValuePair>();
list.add(new BasicNameValuePair("name", name));
list.add(new BasicNameValuePair("age", age));
try {
httpPost.setEntity(new UrlEncodedFormEntity(list));
HttpResponse response = client.execute(httpPost);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
String content = EntityUtils.toString(response.getEntity());
Log.e("TAG", "" + content);
}
} catch (Exception e) {
e.printStackTrace();
}
}
private void doHttpClientGet() {
HttpGet httpGet = new HttpGet(url);
// 获取对象
HttpClient client = new DefaultHttpClient();
try {
HttpResponse response = client.execute(httpGet);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
String content = EntityUtils.toString(response.getEntity());
Log.e("TAG", "" + content);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void run() {
super.run();
doHttpClientGet();
doHttpClientPost();
}
}