接着建立另外一个工程，在这个工程中调用client工程中的view和调用sayHello（）方法。在这个类中主要涉及到了DexClassLoader这个类的使用。
package com.example.dexclassloaderserver;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.List;
import dalvik.system.DexClassLoader;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.util.Log;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
useDexClassLoader();
}
@SuppressLint("NewApi")
public void useDexClassLoader() {
Intent mIntent = new Intent();
mIntent.setClassName("com.example.dexclassloaderclient",
"com.example.dexclassloaderclient.MainActivity");
PackageManager pm = this.getPackageManager();
List<ResolveInfo> mList = pm.queryIntentActivities(mIntent,
PackageManager.MATCH_DEFAULT_ONLY);
ResolveInfo info = mList.get(0);
String apkPath = info.activityInfo.applicationInfo.sourceDir;
String optPath = this.getCodeCacheDir().getAbsolutePath();
String libPath = info.activityInfo.applicationInfo.nativeLibraryDir;
DexClassLoader clsLoader = new DexClassLoader(apkPath, optPath,
libPath, this.getClass().getClassLoader());
try {
Class cls = clsLoader
.loadClass("com.example.dexclassloaderclient.MainActivity");
Object obj = cls.newInstance();
Method invokeMethod = cls.getDeclaredMethod("sayHello",
new Class[] { String.class });
invokeMethod.setAccessible(true);
invokeMethod.invoke(obj, "hello world,DexClassLoader");
} catch (Exception e) {
e.printStackTrace();
}
}
}
生成的结果为：
I/dex2oat (20250): dex2oat took 1.547s (threads: 4) D/mmtag (20229): hello world,DexClassLoader D/OpenGLRenderer(20229): Render dirty regions requested: tru
