安卓ANTLR使工作不正常

本文介绍了安卓ANTLR使工作不正常的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想用ANTLR在Android上，我发现这一点： ANTLR和Android

I am trying to use ANTLR on Android, and I found this: ANTLR and Android

下载AntlrJavaRuntime后，我不知道该怎么做，我应该做出这样的：

After downloading the AntlrJavaRuntime I am not sure of what to do, I am supposed to make this:

1. lunch the appropriate target 2. make AntlrJavaRuntime 3. verify that AntlrJavaRuntime.xml was placed in /system/etc/permissions and 4. AntlrJavaRuntime.jar was placed in /system/framework 5. after this, you can run a normal make

首先，什么是第1步，即使手段？

First of all, what does step 1 even means?

其次，当我尝试这样做：让AntlrJavaRuntime我收到以下错误：

Secondly, when I try doing: make AntlrJavaRuntime I get the following error:

~/AntlrJavaRuntime$ make AntlrJavaRuntime make: Nothing to be done for `AntlrJavaRuntime'.

这是很难找到这个文件，所以任何帮助，真是AP preciated（或如何获得ANTLR准备的Andr​​oid项目一个明显的例子）。

It's very hard to find documentation about this, so any help is really appreciated (or a clear example of how to get ANTLR ready for an Android project).

推荐答案

嗯，我只是做了一个小测试与普通ANTLR版本，一切都很好。

Well, I just did a little test with a "plain" ANTLR version, and everything went just fine.

下面是我所做的：

创建一个 bk.andabac 的活动命名为一个包，名为 AndAbac （Android的算盘）的新项目名为 AndAbac 。

Create a new project called AndAbac (Android-Abacus) with a package named bk.andabac and an activity called AndAbac.

中创建一个语法文件 Exp.g （说明的这里）系统上的任意位置，并粘贴在它下面的：

Create a grammar file called Exp.g (explanation here) anywhere on your system and paste the following in it:

grammar Exp; @parser::header { package bk.andabac; } @lexer::header { package bk.andabac; } eval returns [double value] : exp=additionExp {$value = $exp.value;} ; additionExp returns [double value] : m1=multiplyExp {$value = $m1.value;} ( '+' m2=multiplyExp {$value += $m2.value;} | '-' m2=multiplyExp {$value -= $m2.value;} )* ; multiplyExp returns [double value] : a1=atomExp {$value = $a1.value;} ( '*' a2=atomExp {$value *= $a2.value;} | '/' a2=atomExp {$value /= $a2.value;} )* ; atomExp returns [double value] : n=Number {$value = Double.parseDouble($n.text);} | '(' exp=additionExp ')' {$value = $exp.value;} ; Number : ('0'..'9')+ ('.' ('0'..'9')+)? ; WS : (' ' | '\t' | '\r'| '\n') {$channel=HIDDEN;} ;

3下载ANTLR和放大器;生成词法/语法分析器

下载ANTLR这里：www.antlr3/download/antlr-3.3-complete.jar并把它放在同一目录下 Exp.g 文件。 （此处解释）生成词法和语法分析器，并复制生成的的.java 文件到以下文件夹在你的Andr​​oid项目：的src / BK / andabac 。同时把这个ANTLR罐子到你的Andr​​oid项目的类路径。

3 download ANTLR & generate lexer/parser

Download ANTLR here: www.antlr3/download/antlr-3.3-complete.jar and put it in the same directory as your Exp.g file. Generate a lexer and parser (explanation here) and copy the generated .java files to the following folder in your Android project: src/bk/andabac. Also put this ANTLR jar to the classpath of your Android project.

粘贴 RES /布局/ main.xml中如下：

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="schemas.android/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <EditText android:id="@+id/input_text" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="5 * (8 + 2)" /> <Button android:id="@+id/parse_button" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="eval" /> <TextView android:id="@+id/output_text" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="" /> </LinearLayout>

和的src / BK / andabac / AndAbac.java 如下：

package bk.andabac; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import org.antlr.runtime.ANTLRStringStream; import org.antlr.runtime.CommonTokenStream; import org.antlr.runtime.RecognitionException; public class AndAbac extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final Button button = (Button)findViewById(R.id.parse_button); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { EditText in = (EditText)findViewById(R.id.input_text); TextView out = (TextView)findViewById(R.id.output_text); String source = in.getText().toString(); ExpLexer lexer = new ExpLexer(new ANTLRStringStream(source)); ExpParser parser = new ExpParser(new CommonTokenStream(lexer)); try { out.setText(source + " = " + parser.eval()); } catch (RecognitionException e) { out.setText("Oops: " + e.getMessage()); } } }); } }

5的测试应用程序

无论是运行在模拟器的项目，或创建一个APK文件和Android设备（我测试了，都工作）上安装此。你会看到$ P $经过以下pssing的评估键：