Calling C++ functions from native code
So far, we have called a C function implemented in the c_functions.c source
, so, in the next section, we will show you how to call a C++ member class.
First, we will add the isPrimeCPlusPlus
native method to MyNativeActivty
that returns String
as a result. Let's see how the native function declaration will look:
public class MyNativeActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { ... TextView cPlusTv = (TextView) findViewById(R.id.helloFromCPlusPlus); cPlusTv.setText(isPrimeCPlusPlus(4)); } public native String isPrimeCPlusPlus(int number); }
Running the javah
tool against the new MyNativeActivity
class definition will generate a new function declaration with the following ...
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