在Android中静默安装应用

首先，说明，为了安全是无法在所有的Android 系统中进行静默安装的，我下面所讲的静默安装的前提是必须是系统的签名才行，好了，不多了，直接上代码。

第一步，添加一个安装回调接口public interface OnInstalledPackaged {

public void packageInstalled（String packageName, int returnCode）;}第二步，定义一个系统不可见的接口IPackageInstallObserver，所以包名是不能变的package android.content.pm;public interface IPackageInstallObserver extends android.os.IInterface {

public abstract static class Stub extends android.os.Binder implements android.content.pm.IPackageInstallObserver {
public Stub（） {
throw new RuntimeException（"Stub！"）;
} public static android.content.pm.IPackageInstallObserver asInterface（android.os.IBinder obj） {
throw new RuntimeException（"Stub！"）;
} public android.os.IBinder asBinder（） {
throw new RuntimeException（"Stub！"）;
} public boolean onTransact（int code, android.os.Parcel data, android.os.Parcel reply, int flags）
throws android.os.RemoteException {
throw new RuntimeException（"Stub！"）;
}
} public abstract void packageInstalled（java.lang.String packageName, int returnCode）
throws android.os.RemoteException;
}第三步，实现ApplicationManager功能import java.io.File;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;import android.content.Context;
import android.content.pm.IPackageInstallObserver;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.RemoteException;public class ApplicationManager {
public final int INSTALL_REPLACE_EXISTING = 2;
public static final int INSTALL_SUCCEEDED = 1; private PackageInstallObserver observer;
private PackageManager pm;
private Method method;

private OnInstalledPackaged onInstalledPackaged;

class PackageInstallObserver extends IPackageInstallObserver.Stub { public void packageInstalled（String packageName, int returnCode） throws RemoteException {
if （onInstalledPackaged ！= null） {
onInstalledPackaged.packageInstalled（packageName, returnCode）;
}
}
}

public ApplicationManager（Context context） throws SecurityException, NoSuchMethodException {

observer = new PackageInstallObserver（）;
pm = context.getPackageManager（）;

Class<？>[] types = new Class[] {Uri.class, IPackageInstallObserver.class, int.class, String.class};
method = pm.getClass（）.getMethod（"installPackage", types）;
}

public void setOnInstalledPackaged（OnInstalledPackaged onInstalledPackaged） {
this.onInstalledPackaged = onInstalledPackaged;
} public void installPackage（String apkFile） throws IllegalArgumentException, IllegalAccessException, InvocationTargetException {
installPackage（new File（apkFile））;
}

public void installPackage（File apkFile） throws IllegalArgumentException, IllegalAccessException, InvocationTargetException {
if （！apkFile.exists（）） throw new IllegalArgumentException（）;
Uri packageURI = Uri.fromFile（apkFile）;
installPackage（packageURI）;
}

public void installPackage（Uri apkFile） throws IllegalArgumentException, IllegalAccessException, InvocationTargetException {
method.invoke（pm, new Object[] {apkFile, observer, INSTALL_REPLACE_EXISTING, null}）;
}

}