在Android應用程序上獲取網站數據

Question

我想在我的android應用程序中獲取我的網站數據。我用下面的代碼嘗試了它，應用程序啓動，然後在屏幕上顯示加載數據的簡單activity_main.xml。我附上我的代碼，請指導我。

MainActivity.java：

package com.example.httpexample; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.TextView; 

public class MainActivity extends Activity 
{ 
    TextView httpStuff; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     httpStuff = (TextView) findViewById(R.id.tvHttp); 
     GetMethodEx test = new GetMethodEx(); 
     String returned; 
     try 
     { 
      returned = test.getInternetData(); 
      httpStuff.setText(returned); 
     } 
     catch(Exception e) 
     { 
      e.printStackTrace(); 
     } 

    } 

} 

GetMethodEx.java：

package com.example.httpexample; 

import java.io.BufferedReader; 
import java.io.InputStreamReader; 
import java.net.URI; 

import org.apache.http.HttpResponse; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpGet; 
import org.apache.http.impl.client.DefaultHttpClient; 

public class GetMethodEx 
{ 
    public String getInternetData() throws Exception 
    { 
     BufferedReader in = null; 
     String data = null; 
     try 
     { 
      HttpClient client = new DefaultHttpClient(); 
      URI website = new URI("http://www.hashmedia.in"); 
      HttpGet request = new HttpGet(); 
      request.setURI(website); 
      HttpResponse response = client.execute(request); 
      in = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); 
      StringBuffer sb = new StringBuffer(""); 
      String l = ""; 
      String nl = System.getProperty("line.separator"); 
      while ((l = in.readLine()) != null) 
      { 
       sb.append(l + nl); 
      } 
      in.close(); 
      data = sb.toString(); 
      return data; 
     } 
     finally 
     { 
      if(in!=null) 
      { 
       try 
       { 
        in.close(); 
        return data; 
       } 
       catch(Exception e) 
       { 
        e.printStackTrace(); 
       } 
      } 
     } 
    } 
} 

activity_main.xml中：

<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: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="com.example.httpexample.MainActivity" > 

    <ScrollView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent"> 

    <TextView 
     android:id="@+id/tvHttp" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Loading Data" /> 

    </ScrollView> 

</LinearLayout> 

Answer 1

簡單，意圖通過網站查看，

Intent viewIntent = new Intent("android.intent.action.VIEW", Uri.parse("http://www.hashmedia.in")); 
startActivity(viewIntent); 

使用這個簡單的代碼來查看您的網站在Android應用程序。

如果你想得到特定的數據使用JSON的web服務。

http://www.androidhive.info/2012/01/android-json-parsing-tutorial/

添加Internet權限清單文件，

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

Answer 2

黑屏？您是否已將INTERNET權限定義到您的清單文件中？

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

Answer 3

嘗試一些事情是這樣的：

youlayout.xml

<WebView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/webview" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
/> 

yourcode.java

​​

的manifest.xml

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