I want to test the following code, but the DDMS always display
"Unknown socket error -1" , I think the code is correct, Must I set up
the emulator or soming? Thank you.
Source Code:
public class SocketApp extends Activity {
private Button ok;
private TextView tv1;
HttpURLConnection uc ;
URL url;
private static final String ip="code.google.com/android/images/
logo_android.gif";
private static final String host="";
private static final String path = "http://"; + ip +host ;
ImageView view1;
InputStream is;
BufferedInputStream bis;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ok = (Button)findViewById(R.id.Button01);
ok.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
openConn();
sendRequest();
getRespones();
closeConn();
}
});
}
private void openConn(){
try {
url=new URL(path);
uc = (HttpURLConnection)url.openConnection();
uc.setDoInput(true);
}catch (MalformedURLException e){
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void sendRequest(){
try {
Log.i("[SocketApp]"," conn begin .....");
uc.connect();
Log.i("[SocketApp]","conn end .....");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void getRespones(){
try {
is = uc.getInputStream();
Log.d("lenght",""+uc.getContentLength());
tv1.setText(uc.getContentLength()+"");
bis = new BufferedInputStream(is);
Bitmap bm = BitmapFactory.decodeStream(bis);
view1.setImageBitmap(bm);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
private void closeConn(){
try {
uc.disconnect();
bis.close();
is.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android";
package="com.ltinc.cn">
<application android:icon="@drawable/icon" android:label="@string/
app_name">
<activity android:name=".SocketApp" android:label="@string/
app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
</intent-filter>>
</activity>
</application>
</manifest>
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