工程先用eclipse生成class目录，转到class目录下执行: javap -s com.example.hellojni.MainActivity
Compiled from "MainActivity.java" public class com.example.hellojni.MainActivity extends android.app.Activity { static {}; Signature: ()V public com.example.hellojni.MainActivity(); Signature: ()V protected void onCreate(android.os.Bundle); Signature: (Landroid/os/Bundle;)V public boolean onCreateOptionsMenu(android.view.Menu); Signature: (Landroid/view/Menu;)Z public native java.lang.String stringFromJNI(); //native 方法 Signature: ()Ljava/lang/String; //签名 public native int max(int, int); //native 方法 Signature: (II)I //签名 }
最后附上com/example/hellojni/MainActivity.java代码:
1 package com.example.hellojni; 2 import android.os.Bundle; 3 import android.app.Activity; 4 import android.util.Log; 5 import android.view.Menu; 6 import android.widget.TextView; 7 8 public class MainActivity extends Activity { 9 @Override 10 protected void onCreate(Bundle savedInstanceState) { 11 super.onCreate(savedInstanceState); 12 setContentView(R.layout.activity_main); 13 TextView tv = new TextView(this); 14 tv.setText( stringFromJNI() ); 15 setContentView(tv); 16 Log.d("JNI", "max = " + max(10, 100)); 17 } 18 @Override 19 public boolean onCreateOptionsMenu(Menu menu) { 20 getMenuInflater().inflate(R.menu.main, menu); 21 return true; 22 } 23 24 public native String stringFromJNI(); 25 public native int max(int a,int b); 26 static { 27 System.loadLibrary("hellojni"); 28 } 29 }
转播
