Question

我有一个Java程序，它与下面的代码完美配合。当我将它添加到Android时，我在BufferedReader行获得异常。我已经为清单文件添加了权限。我在实际设备上运行代码。 runController（）方法返回一个我在屏幕上打印的String。我能找到的唯一解决方案是必须添加互联网权限，我这样做了。我不知道我错过了什么。任何帮助将不胜感激。我的代码如下：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidwebconnect"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.androidwebconnect.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

Java代码是：

public class ControllerLast {

private static URL urlObj;
private static URLConnection connection;

String message;
String urlString = "http://www.dailydiary.hljointventure.co.za/viewentry.php"; //the url for the website is here

public ControllerLast() {

}

public String runControllerLast() {

    try {            
        urlObj = new URL(urlString);
        connection = urlObj.openConnection();
        connection.setDoOutput(true);   
    }
    catch (MalformedURLException ex) {
        message = ex.getMessage(); 
    }
    catch (Exception ex) {
        message = ex.getMessage();
    }

    try {       
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String lineRead = "";

        while ((lineRead = reader.readLine()) != null) {
            message = lineRead;
        }

        reader.close();
    }
    catch (IOException ex) {
        message = ex.getMessage();
    }

    return message;
}   
}


public class MainActivity extends Activity {

String message;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button btnStatus = (Button)findViewById(R.id.btn_check);
    final TextView text = (TextView)findViewById(R.id.text);

    btnStatus.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            text.setText(message);
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
}

添加了Internet权限的android bufferedreader抛出异常

0 个答案: