我知道还有其他这样的帖子,但它无济于事。
我的代码在模拟器中工作,但在设备上我得到一个例外: java.lang.IllegalArgumentException:主机名可能不为null
设置了权限:
<uses-permission android:name="android.permission.INTERNET" />
以下是代码:
package com.example.testapp;
import java.net.URI;
import org.apache.http.HttpEntity;
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;
import org.apache.http.util.EntityUtils;
import android.annotation.TargetApi;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
public class mainAct extends Activity {
public void onCreate(Bundle savedState) {
super.onCreate(savedState);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
ARequestTask task = new ARequestTask();
task.execute(new String[] {});
}
class ARequestTask extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
String hallo = "test";
Log.d("EMAIL", hallo);
try {
HttpClient client = new DefaultHttpClient();
URI uri = new URI("http://.../android/index.php");
HttpGet get = new HttpGet(uri);
HttpResponse responseGET = client.execute(get);
HttpEntity resEntity = responseGET.getEntity();
if (resEntity != null) {
Log.i("RESPONSE", EntityUtils.toString(resEntity));
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// use the result as you wish
}
}
}
每次执行HttpGet时,Exception都会出现但仅在设备上出现。
答案 0 :(得分:0)
尝试使用:
URI uri = URI.parse("http://.../android/index.php");
执行此操作后,查看调试器中的uri对象。检查它是否有效。 祝你好运。