android应用后台安装，静默安装的代码实现方法

首先，你要有linux环境或其他可以mmm交叉编译的环境，因为这个用到的是隐藏api，SDK中没有的，ecilipse里面会提示包不存在，但交叉编译可以，如果你不知道mmm编译，请return。

代码如下：

import android.app.Activity;

import android.os.Bundle;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.content.pm.PackageManager.NameNotFoundException;

import android.content.pm.IPackageInstallObserver;

import android.content.res.Resources;

import android.graphics.drawable.Drawable;

import android.net.Uri;

import android.os.Environment;

import android.os.Handler;

import android.os.Message;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ProgressBar;

import android.widget.TextView;

public class InstallActivity extends Activity {

/** Called when the activity is first created. */

private Button btn2=null;

private final int INSTALL_COMPLETE = 1;

final static int SUCCEEDED = 1;

final static int FAILED = 0;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

btn=(Button) findViewById(R.id.btn2);

btn2.setOnClickListener(listener2);

}

private OnClickListener listener2=new OnClickListener(){

public void onClick(View v) {

String fileName = Environment.getExternalStorageDirectory() + "/baidu/"+"UC.apk";

Uri uri = Uri.fromFile(new File(fileName));

int installFlags = 0;

PackageManager pm = getPackageManager();

try {

PackageInfo pi = pm.getPackageInfo("com.uc.browser",

PackageManager.GET_UNINSTALLED_PACKAGES);

if(pi != null) {

installFlags |= PackageManager.INSTALL_REPLACE_EXISTING;

}

} catch (NameNotFoundException e) {

}

// String installerPackageName = getIntent().getStringExtra(

// Intent.EXTRA_INSTALLER_PACKAGE_NAME);

PackageInstallObserver observer = new PackageInstallObserver();

pm.installPackage(uri, observer, installFlags, "com.uc.browser");

}

};

class PackageInstallObserver extends IPackageInstallObserver.Stub {

public void packageInstalled(String packageName, int returnCode) {

Message msg = mHandler.obtainMessage(INSTALL_COMPLETE);

msg.arg1 = returnCode;

mHandler.sendMessage(msg);

}

};

private Handler mHandler = new Handler() {

public void handleMessage(Message msg) {

switch (msg.what) {

case INSTALL_COMPLETE:

// Update the status text

// Show the ok button

int centerTextLabel;

Drawable centerTextDrawable = null;

if(msg.arg1 == SUCCEEDED) {

} else {}

if (centerTextDrawable != null) {}

break;

default:

break;

}

}

};

}

重点是要实现一个这个类PackageInstallObserver，另外要注意import android.content.pm.……的那些包一定要导入。android.mk文件如下

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE_TAGS := user

LOCAL_SRC_FILES := $(call all-subdir-java-files)

LOCAL_PACKAGE_NAME := InstallActivity

LOCAL_CERTIFICATE := platform

include $(BUILD_PACKAGE)

重点是LOCAL_CERTIFICATE := platform要对

另外编译的时候有可能会报R.java类重复错误，把你工程下gen文件夹删除即可，不会影响编译，传说中会在别的地方自动生成^……

作为一个新手，研究了四天无果，网上苦苦追寻无果，最后还是再前辈的带领下看系统安装源代码得来。看来要学好android还是要会看源代码。卷毛大帝。

这个在2.1上编译通过可以用，后台安装可以实现，后台卸载也可以实现，可以和安卓市场一样了。希望大家不要用这个功能搞图谋不轨的事情。

现在把工程和apk传上来大家看看，这种方法看来也不是适用于每一个系统，android系统太不统一了，只能这样了。

http://115.com/file/bhrs7fr4#

工程和apk.zip