Unable to execute dex: method ID not in[0, 0xffff]: 65536 在eclipse最簡單的解法

如果可以用android studio此問題可更簡單的解決, 但非要用eclipse時, 就真的很麻煩, 網路找到最簡單的解法, 就是套用別人寫好的方案. 說是簡單, 但其實還是遇到很多挫折. 所以還是建議用android studio比較簡單.


 當我們的程式碼過大時，編譯時會報Unable to execute dex: method ID not in[0, 0xffff]: 65536)錯誤。當出現這個錯誤時說明你程式碼含有的太多的方法，或者你引用的第三方jar包有太多的方法，這兩者的方法加起來已經超過了65536這個數目。

以下基本參考下列文章, 加上自己實作的補充:

http://blog.csdn.net/stevenhu_223/article/details/41277827

ant操作參考:
http://www.cnblogs.com/yaozhongxiao/p/3523061.html

到此頁面下載, 並按其說明實作

https://github.com/mmin18/Dex65536

Step1: 複製以下兩個檔案到android project的根目錄下

Dex65536/custom_rules.xml
Dex65536/pathtool.jar

Copy these two files in your android project, and execute the following command to generate build.xml.

到如下adt的目錄
cd D:\adt-bundle-windows-x86-20140702\sdk\tools在命令列, 執行下列
android update project --target 2 -p "D:\My Documents\AndroidApp\docSearch"命令
因為還有用到google-play-services_lib(在另一個單獨的project), 所以還要加上這個
android update project -p "D:\My Documents\AndroidApp\google-play-services_lib"

(以上 -p 後接專案根路徑, --target 2 , 其中的的2是在D:\adt-bundle-windows-x86-20140702\sdk\tools執行 android list targets, 得到的值.(id: 2 or "android-22")
http://developer.android.com/tools/projects/projects-cmdline.html#UpdatingAProject)

Step2: add some code

You need to add some code to load the secondary .dex file before your application starts.

public class App extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
// copy dexTool() method into your own custom Application and call it after super.onCreate().
        dexTool();
    }

    /**
     * Copy the following code and call dexTool() after super.onCreate() in
     * Application.onCreate()
     * 
     * This method hacks the default PathClassLoader and load the secondary dex
     * file as it's parent.
     */
    @SuppressLint("NewApi")
    private void dexTool() {

        File dexDir = new File(getFilesDir(), "dlibs");
        dexDir.mkdir();
        File dexFile = new File(dexDir, "libs.apk");
        File dexOpt = new File(dexDir, "opt");
        dexOpt.mkdir();
        try {
            InputStream ins = getAssets().open("libs.apk");
            if (dexFile.length() != ins.available()) {
                FileOutputStream fos = new FileOutputStream(dexFile);
                byte[] buf = new byte[4096];
                int l;
                while ((l = ins.read(buf)) != -1) {
                    fos.write(buf, 0, l);
                }
                fos.close();
            }
            ins.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

        ClassLoader cl = getClassLoader();
        ApplicationInfo ai = getApplicationInfo();
        String nativeLibraryDir = null;
        if (Build.VERSION.SDK_INT > 8) {
            nativeLibraryDir = ai.nativeLibraryDir;
        } else {
            nativeLibraryDir = "/data/data/" + ai.packageName + "/lib/";
        }
        DexClassLoader dcl = new DexClassLoader(dexFile.getAbsolutePath(),
                dexOpt.getAbsolutePath(), nativeLibraryDir, cl.getParent());

        try {
            Field f = ClassLoader.class.getDeclaredField("parent");
            f.setAccessible(true);
            f.set(cl, dcl);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}

Step3: ant build and run

Make sure you have ant installed.

cd /YourProject
ant clean debug install run
ant debug install rund (不clean且進入debug 偵錯)
ant run (直接run, 不compile)

其他注意事項:
   

1.eclipse 中 Run as-> Ant build 未出現的解法

down vote

in eclipse :1. Help -> Install New SoftWare Work With -> "http://download.eclipse.org/releases/juno" Drop down list "General Purpose Tools" select "Eclipse Plug-in Development Environment" After doing this...eclipse restart, then show option of Ant Build in Run as

2.使用ant遇到invalid resource directory name: res crunch

這是因為ant無法處理crunch資料夾

1.先把Eclipse中[Project]-->[Build Automatically]關掉(否則crunch資料夾會一直被自動生成)
2.將bin/res/crunch刪除