android stk,GitHub - janstk/duktape-android: The Duktape embeddable Javascript engine packaged for A...
Duktape Android
Usage
Duktape duktape = Duktape.create();
try {
Log.d("Greeting", duktape.evaluate("'hello world'.toUpperCase();"));
} finally {
duktape.close();
}
Calling Java from JavaScript
You can bind a Java object to a JavaScript global, and call Java functions from JavaScript!
Currently, the following Java types are supported for function arguments and return values:
boolean and Boolean
int and Integer
double and Double
String
void return values are also supported.
Example
Suppose we wanted to expose the functionality of okio's ByteString in JavaScript to
convert hex-encoded strings back into UTF-8. First, define a Java interface that declares
the methods you would like to call from JavaScript:
interface Utf8 {
String fromHex(String hex);
}
Next, implement the interface in Java code (we leave the heavy lifting to okio):
Utf8 utf8 = new Utf8() {
@Override public String fromHex(String hex) {
return okio.ByteString.decodeHex(hex).utf8();
}
};
Now you can bind the object to a JavaScript global, making it available in JavaScript code:
Duktape duktape = Duktape.create();
try {
// Bind our interface to a JavaScript object called Utf8.
duktape.bind("Utf8", Utf8.class, utf8);
String greeting = duktape.evaluate("" +
// Here we have a hex encoded string.
"var hexEnc = 'EC9588EB8595ED9598EC84B8EC9A9421';\n" +
// Call out to Java to decode it!
"var message = Utf8.fromHex(hexEnc);\n" +
"message;");
Log.d("Greeting", greeting);
} finally {
duktape.close();
}
Download
compile 'com.squareup.duktape:duktape-android:0.9.5'
This library is provided as a "fat" aar with native binaries for all available architectures. To
reduce your APK size, use the ABI filtering/splitting techniques in the Android plugin:
http://tools.android.com/tech-docs/new-build-system/user-guide/apk-splits
Snapshots of the development version are available in Sonatype's snapshots repository.
Building
For Android
./gradlew build
NOTE: When building with Android NDK r11b, the NDK bundle has an issue where the path to
clang is incorrect. This can be fixed by creating a symlink called /toolchains/llvm-3.8
to /toolchains/llvm.
For Mac
./build_mac
Set the java.library.path system property to build/ when you execute Java.
License
Copyright 2015 Square, Inc.
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.
Note: The included C code from Duktape is licensed under MIT.