重点是开启网络权限
难点是调用函数
开启网络权限
</application>
<uses-permission android:name="android.permission.INTERNET">
</uses-permission>
</manifest>
读json的函数
public static String get(String urlString) {
/*try{
HttpGet request = new HttpGet(urlString);
String result=getHttpClient().execute(request,new BasicResponseHandler());
return result;
}catch(IOException e){
throw e;
}*/
String result="";
BufferedReader in=null;
try {
HttpClient client = new DefaultHttpClient();
HttpGet request=new HttpGet(urlString);
HttpResponse response = client.execute(request);
in=new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer sb=new StringBuffer("");
String line="";
String NL=System.getProperty("line.separator");
// String NL="";
while((line=in.readLine())!=null){
sb.append(line+NL);
}
in.close();
result=sb.toString();
result=JsonFilter(result);
}
catch (Exception e) {
e.printStackTrace();
}
finally{
if(in!=null){
try{
in.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
return result;
}
/*
* 对json字符串进行过滤,防止乱码和黑框
*/
public static String JsonFilter(String jsonstr){
return jsonstr.substring(jsonstr.indexOf("{")).replace("\r\n","\n");
}
调用函数
/*****************************************************主要是点击事件*********************************************/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); final Button button1 = (Button) findViewById(R.id.button1);//final获得句柄 获得句柄
final TextView textView = (TextView) findViewById(R.id.textView1); button1.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{ textView.setText(get("http://www.weather.com.cn/data/cityinfo/101010100.html")); } }); }