优化：项目结构、命名

app/jni_headers/com_myjni_api_NativeCommand.h

@@ -0,0 +1,21 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class com_myjni_api_NativeCommand */
+
+#ifndef _Included_com_myjni_api_NativeCommand
+#define _Included_com_myjni_api_NativeCommand
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     com_myjni_api_NativeCommand
+ * Method:    testHello
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_com_myjni_api_NativeCommand_testHello
+  (JNIEnv *, jobject);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

app/src/main/java/com/example/myjni/MainActivity.java

@@ -4,7 +4,7 @@ import androidx.appcompat.app.AppCompatActivity;
 
 import android.os.Bundle;
 
-import com.myjni.mynative.MyClientCmd;
+import com.myjni.api.NativeCommand;
 
 public class MainActivity extends AppCompatActivity {
 
@@ -13,7 +13,7 @@ public class MainActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        MyClientCmd cmd = new MyClientCmd();
+        NativeCommand cmd = new NativeCommand();
         cmd.callHello();
     }
 }

app/src/main/java/com/myjni/api/NativeCommand.java

@@ -0,0 +1,13 @@
+package com.myjni.api;
+
+public class NativeCommand {
+    static {
+        System.loadLibrary("mynative"); // 注意去掉 lib 前缀和 .so 后缀
+    }
+
+    public native void testHello();
+
+    public void callHello() {
+        testHello();
+    }
+}

app/src/main/java/com/myjni/mynative/MyClientCmd.java

@@ -1,13 +0,0 @@
-package com.myjni.mynative;
-
-public class MyClientCmd {
-    static {
-        System.loadLibrary("comclientjni"); // 注意去掉 lib 前缀和 .so 后缀
-    }
-
-    public native void testHello();
-
-    public void callHello() {
-        testHello();
-    }
-}