我试图运行我的部分代码,我通过 DexClassLoader 从我的 sdcard 上的外部 APK 获取方法 startDownload。在我的活动的 onCreate 方法中,我试图调用这个活动,这意味着我想调用下载。main(DownloadManagerActivity)源码:
try {
DexClassLoader cl = new DexClassLoader("/sdcard/GingerbreadDownload.apk",
getFilesDir().getAbsolutePath(),
null,
DownloadManagerActivity.class.getClassLoader());
Class<?> n = cl.loadClass("com.gingerbread.download.Download23");
Method m=n.getDeclaredMethod("startDownload", null);
m.invoke(this,(Object[]) null );
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
下载23.java源代码:
public class Download23 {
public static void startDownload() {
DownloadManager mgr=null;
long lastDownload;
String downloadedAPKName="myApp";
Uri uri=Uri.parse("http://someuri.com/test.apk");
Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
.mkdirs();
lastDownload = mgr.enqueue(new DownloadManager.Request(uri)
.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI |
DownloadManager.Request.NETWORK_MOBILE)
.setAllowedOverRoaming(false)
.setTitle("Title")
.setDescription("Info")
.setShowRunningNotification(true)
.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, downloadedAPKName));
}
BroadcastReceiver onComplete=new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
File file = new File(Environment.getExternalStorageDirectory()+"/Download/", "myApp");
Intent intenta = new Intent(Intent.ACTION_VIEW);
intenta.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
context.startActivity(intenta);
}
};
}
我在m.invoke(this,(Object[]) null );行中收到错误java.lang.reflect.InvocationTargetException 在我的主要。我真的不知道,可能有什么错误。我用简单的方法试过了,连接到我的“外部”方法没问题。但我无法启动下载。这可能很棘手,但我现在真的坚持下去了。有没有人有任何想法?