Hi ,everyone.I am using http connection demo,the following is the
code.In the eclipse debugging mode, I can't get the error
message.Eclipse recommended me like this
Evaluations must contain either an expression or a block of well-
formed statements
when the break point is set at line 80.The eclipse version is 3.3.2
java code:
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import android.app.Activity;
import android.content.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class NetDemo 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 icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
tv1 = (TextView) this.findViewById(R.id.tv1);
ok = (Button) this.findViewById(R.id.ok);
view1 = (ImageView) findViewById(R.id.icon);
/*
* Resources res=this.getResources();
res.getDrawable(R.drawable.icon);
* Bitmap bm = BitmapFactory.decodeResource(res,
R.drawable.icon);
* view1.setImageBitmap(bm);
*/
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 {
uc.connect();
} catch (IOException e) {
System.out.println(e.getMessage());
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception 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();
if (null != bis) {
bis.close();
}
if (null != is) {
is.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
R.java
public final class R {
public static final class attr {
}
public static final class drawable {
public static final int icon=0x7f020000;
}
public static final class id {
public static final int confirm=0x7f050002;
public static final int description=0x7f050001;
public static final int email=0x7f050000;
}
public static final class layout {
public static final int main=0x7f030000;
public static final int user_reg=0x7f030001;
}
public static final class string {
public static final int app_name=0x7f040000;
public static final int confirm=0x7f040004;
public static final int description=0x7f040002;
public static final int edit_userinfo=0x7f040005;
public static final int email=0x7f040001;
public static final int menu_insert=0x7f040003;
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
androidrientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView android:id="@+id/icon" android:layout_marginTop="4dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />.
<Button android:id="@+id/ok" android:text="OK"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView android:id="@+id/tv1" android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello World, NetDemo"
android:scrollbars="vertical" />
</LinearLayout>
Any refrence would be thankful.
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