Android回顾之静默安装

应用有时候会需要静默安装一些应用（你们懂得！）。

但是 PackageManager.installPackage方法被隐藏了，需要反射调用。

// 静默安装
	public static void staticInstall(File fp, String packageName,IPackageInstallObserver callback,
			Context context) {
		PackageManager pm = context.getPackageManager();
		int flags = 0;

		Class<? extends PackageManager> o = pm.getClass();

		Field[] fields = o.getFields();
		for (Field f : fields) {
			if (f.getName().equals("INSTALL_INTERNAL")) {

				try {
					flags = f.getInt(pm);
				} catch (IllegalAccessException e) {
					e.printStackTrace();
					return;
				}
				break;
			}

		}
		

		Method[] methods = o.getMethods();
		Uri uri = Uri.fromFile(fp);

		for (Method m : methods) {
			if (m.getName().equals("installPackage")) {
				try {
					m.setAccessible(true);

					m.invoke(pm, new Object[] { uri, callback, flags, packageName });
				} catch (IllegalArgumentException e) {
					Log.d("chen", "IllegalArgumentException err=" + e.getMessage());
					e.printStackTrace();
					return;
				} catch (IllegalAccessException e) {
					e.printStackTrace();
					Log.d("chen", "IllegalAccessException err=" + e.getMessage());
					return;
				} catch (InvocationTargetException e) {
					Log.d("chen", "InvocationTargetException err=" + e.getMessage());
					e.printStackTrace();
					return;
				}
				break;
			}
		}

		Log.d("CreateInstall", "OK");
	};

安装完成回调需要继承自IPackageInstallObserver.Stub的类来完成。