下载完apk安装包后实现自动安装；

需配置的权限；

<uses-permission android:name="android.permission.INTERNET" />

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

   <span style="color: #ff6600;"> <uses-permission android:name="android.permission.INSTALL_PACKAGES"/>

</span>

代码实现；

package com.exmple.httpxutil;

 

import java.io.File;

 

import android.annotation.SuppressLint;

import android.app.Activity;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.content.pm.PackageManager.NameNotFoundException;

import android.content.pm.Signature;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ProgressBar;

 

import com.lidroid.xutils.HttpUtils;

import com.lidroid.xutils.exception.HttpException;

import com.lidroid.xutils.http.HttpHandler;

import com.lidroid.xutils.http.ResponseInfo;

import com.lidroid.xutils.http.callback.RequestCallBack;

 

public class MainActivity extends Activity {

    HttpHandler<File> h;

    private ProgressBar pa;

 

    @SuppressLint("SdCardPath")

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Button button = (Button) findViewById(R.id.button);

        pa = (ProgressBar) findViewById(R.id.pro);

        Button more = (Button) findViewById(R.id.more);

        getCode();

        more.setOnClickListener(new OnClickListener() {

 

            @Override

            public void onClick(View v) {

                Intent ints = new Intent(MainActivity.this, NewActivity.class);

                startActivity(ints);

 

            }

        });

        button.setOnClickListener(new OnClickListener() {

 

            @Override

            public void onClick(View v) {

 

                HttpUtils http = new HttpUtils();

                final String path = Environment.getExternalStorageDirectory()

                        .getPath();

                System.out.println(path);

 

                h = http.download(

                        "http://101.200.142.201:8080/tqyb/baidumap.apk", path

                                + "/badumap.apk", true, true,

                        new RequestCallBack<File>() {

                            @Override

                            public void onStart() {

                                System.out.println("===");

                                System.out.println("开始下载了++++++++++++++");

                            }

 

                            @Override

                            public void onLoading(long total, long current,

                                    boolean isUploading) {

                                System.out.println(total + "=====");

                                System.out.println(current + "=====");

                                System.out.println(isUploading + "=====");

                                pa.setMax((int) total);

                                pa.setProgress((int) current);

                            }

 

                            @Override

                            public void onFailure(HttpException error,

                                    String msg) {

                                System.out.println(error + "+++++++" + msg

                                        + "+++++++++");

 

                            }

 

                            @Override

                            public void onSuccess(

                                    ResponseInfo<File> responseInfo) {

                                h.cancel();

                                installApk(path + "/badumap.apk");

 

                            }

 

                        });

 

            }

        });

 

    }

//安装的方法

    private void installApk(String filename) {

        File file = new File(filename);

        Intent intent = new Intent();

        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        intent.setAction(Intent.ACTION_VIEW);

        String type = "application/vnd.android.package-archive";

        intent.setDataAndType(Uri.fromFile(file), type);

        startActivity(intent);

 

    }

//等到版本号的代码

    private void getCode() {

 

        PackageManager manager;

 

        PackageInfo info = null;

 

        manager = this.getPackageManager();

 

        try {

 

            info = manager.getPackageInfo(this.getPackageName(), 0);

            String name = info.versionName;

            int versionCode = info.versionCode;

            String packageName = info.packageName;

            Signature[] signatures = info.signatures;

            System.out.println(name + "++++++++++" + versionCode + "+++++"

                    + packageName + "========nnn" + signatures

                    + "=============");

            /*

             * info.versionName;

             *

             * info.packageName;

             *

             * info.signatures;

             */

 

        } catch (NameNotFoundException e) {

 

            // TODO Auto-generated catch block

 

            e.printStackTrace();

 

        }

 

    }

 

}