问题
I have 1 EditText 1Button and 1TextView, when I type url in Edittext and click button, the textView will be show the Html from website that i type the url in edittext. I want to get html from web by using url.
Problem
When I using this code in ( AVD Target version 2.3.3). AndroidManifest (minSdkVersion="10" targetSdkVersion="10") and I also change targetSdkVersion="15") both are work correct. but when I change it to run in (AVD target version 4.0.3) it's not work. Y? This is my code
final EditText et = (EditText) findViewById(R.id.editText1);
final Button b = (Button) findViewById(R.id.button1);
final TextView tv = (TextView) findViewById(R.id.textView1);
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
URL url = null;
url = new URL(et.getText().toString());
URLConnection conn = url.openConnection();
BufferedReader buff = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line ="";
while((line = buff.readLine())!= null){
tv.append(line);
}
} catch (Exception e) {
}
回答1:
You're getting a NetworkOnMainThreadException, you can't access the network on the UI thread when using Honeycomb or later. You need to do your work in an AsycnTask. See this question for more info.
回答2:
//before OnCreate() method
URL url = null;
final TextView tv;
////////
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
url = new URL(et.getText().toString());
new YourAsyncTask.execute();
}
} catch (Exception e) {
}
//after onCreate() method
class YourAsyncTask extends AsyncTask<Void, Void, Void>
{
private ProgressDialog progressDialog;
@Override
protected void onPreExecute()
{
//show your dialog here
progressDialog = ProgressDialog.show(YourActivity.this,"Please wait...", "Loading ...", true);
}
@Override
protected Void doInBackground(Void... params)
{
//make your request here - it will run in a different thread
try
{
URLConnection conn = url.openConnection();
BufferedReader buff = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line ="";
while((line = buff.readLine())!= null){
tv.append(line);
}
catch (Exception e)
{
// TODO: handle exception
}
return null;
}
@Override
protected void onPostExecute(Void result)
{
try
{
progressDialog.dismiss();
///Show your Data here
}
catch (Exception e)
{
// TODO: handle exception
}
}
}
回答3:
Check INTERNET PERMISSION in Menifest.
来源：https://stackoverflow.com/questions/12327625/error-when-get-html-from-web-in-android