英文:
I use .so library and get NoSuchMethodError error
问题
我使用.so库，如下所示：
package ru.integrics.mobileschool.view.activity;
import android.util.Base64;
public class MainActivity {
public MainActivity(){
System.loadLibrary("x2");
}
public native String x01(String str);
public String get(String str){
String key = Base64.encodeToString(x01(str.substring(0, str.length() / 2)).getBytes(), Base64.NO_WRAP);
return key;
}
}
但是我得到了错误：
JNI DETECTED ERROR IN APPLICATION:
JNI CallObjectMethodV called with pending exception java.lang.NoSuchMethodError:
no non-static method "Lru/integrics/mobileschool/view/activity/MainActivity;.getPackageManager()Landroid/content/pm/PackageManager;"
我尝试将方法设置为静态，但不起作用。
英文:
I use .so library, as this
package ru.integrics.mobileschool.view.activity;
import android.util.Base64;
public class MainActivity {
public MainActivity(){
System.loadLibrary("x2");
}
public native String x01(String str);
public String get(String str){
String key = Base64.encodeToString(x01(str.substring(0, str.length() / 2)).getBytes(), Base64.NO_WRAP);
return key;
}
}
But i get error:
JNI DETECTED ERROR IN APPLICATION:
JNI CallObjectMethodV called with pending exception java.lang.NoSuchMethodError:
no non-static method "Lru/integrics/mobileschool/view/activity/MainActivity;.getPackageManager()Landroid/content/pm/PackageManager;"
I tried set methods static, but not working
答案1
得分: 0
您将System.loadLibrary("x2"); 放错了地方。您应该将它放在一个静态代码块中：
package ru.integrics.mobileschool.view.activity;
import android.util.Base64;
public class MainActivity {
static {
System.loadLibrary("x2");
}
public MainActivity(){
...
}
public native String x01(String str);
public String get(String str){
String key = Base64.encodeToString(x01(str.substring(0, str.length() / 2)).getBytes(), Base64.NO_WRAP);
return key;
}
}
之后，您需要确认您已正确添加了libx2.so 并且存在一个x01(String) 函数。
英文:
You are placing System.loadLibrary("x2"); wrongly. You should place it in a static block instead:
package ru.integrics.mobileschool.view.activity;
import android.util.Base64;
public class MainActivity {
static {
System.loadLibrary("x2");
}
public MainActivity(){
...
}
public native String x01(String str);
public String get(String str){
String key = Base64.encodeToString(x01(str.substring(0, str.length() / 2)).getBytes(), Base64.NO_WRAP);
return key;
}
}
And after that you have to confirm you have properly added libx2.so and there is a x01(String) function inside.
答案2
得分: 0
如果您阅读错误信息，您会发现它在抱怨一个缺少的Java方法，因为您的MainActivity类没有继承android.app.Activity类，该类提供了所需的getPackageManager方法。
英文:
If you read the error you see it is complaining about a missing Java method because your MainActivity class does not inherit from the android.app.Activity class, which provides the required getPackageManager method.
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