Witam.
Bawię się z Androidem i próbuję zrobić aplikację pobierająca treść strony www.
Tak wygląda kod:
package com.example.user.myapplication;
import android.Manifest;
import android.content.pm.PackageManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CheckPermission();
try {
String fullString = "";
URL url = new URL("http://www.wp.pl");
BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
String line;
while ((line = reader.readLine()) != null) {
fullString += line;
}
reader.close();
} catch (IOException ex) {
String error = ex.getMessage();
}
}
final private int REQUEST_CODE_ASK_PERMISSIONS = 123;
private void CheckPermission() {
try {
int hasInternetConnectionPermission = checkSelfPermission(Manifest.permission.INTERNET);
if (hasInternetConnectionPermission != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.INTERNET},
REQUEST_CODE_ASK_PERMISSIONS);
return;
}
} catch (Exception ex) {
String error = ex.getMessage();
}
}
}
A tak manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.user.myapplication">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Po uruchomieniu aplikacji, pojawia się komunikat "Aplikacja My Application została zatrzymana", program nie wchodzi w żaden z bloków catch.
Dlaczego tak się dzieje?
