Tag: native activity

Android：从C ++ Native Activity调用Java类

Java代码： package local.ttt; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Typeface; public class Text2Bitmap { static Bitmap getBitmap(String text,int fontsize) { Paint paint=new Paint(); paint.setStyle(Paint.Style.FILL); paint.setColor(Color.WHITE); paint.setTextSize(fontsize); paint.setAntiAlias(true); paint.setTypeface(Typeface.DEFAULT); int outwidth=(int)Math.round(paint.measureText(text)); Bitmap bitmap=Bitmap.createBitmap(outwidth,fontsize,Bitmap.Config.ALPHA_8); Canvas canvas=new Canvas(bitmap); canvas.drawText(text,0,fontsize-1,paint); return bitmap; } } C源： … MY_ASSERT(vm_cached!=NULL); JNIEnv* env; jint res=vm_cached->AttachCurrentThread(&env,NULL); MY_ASSERT(res==0); jclass activityClass=env->FindClass(“android/app/NativeActivity”); MY_ASSERT(activityClass!=NULL); jmethodID […]