| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.example.hellojni; |
| |
| import android.app.Activity; |
| import android.widget.TextView; |
| import android.os.Bundle; |
| |
| |
| public class HelloJni extends Activity |
| { |
| /** Called when the activity is first created. */ |
| @Override |
| public void onCreate(Bundle savedInstanceState) |
| { |
| super.onCreate(savedInstanceState); |
| |
| /* Create a TextView and set its content. |
| * the text is retrieved by calling a native |
| * function. |
| */ |
| TextView tv = new TextView(this); |
| tv.setText( stringFromJNI() ); |
| setContentView(tv); |
| } |
| |
| /* A native method that is implemented by the |
| * 'hello-jni' native library, which is packaged |
| * with this application. |
| */ |
| public native String stringFromJNI(); |
| |
| /* This is another native method declaration that is *not* |
| * implemented by 'hello-jni'. This is simply to show that |
| * you can declare as many native methods in your Java code |
| * as you want, their implementation is searched in the |
| * currently loaded native libraries only the first time |
| * you call them. |
| * |
| * Trying to call this function will result in a |
| * java.lang.UnsatisfiedLinkError exception ! |
| */ |
| public native String unimplementedStringFromJNI(); |
| |
| /* this is used to load the 'hello-jni' library on application |
| * startup. The library has already been unpacked into |
| * /data/data/com.example.hellojni/lib/libhello-jni.so at |
| * installation time by the package manager. |
| */ |
| static { |
| System.loadLibrary("hello-jni"); |
| } |
| } |