标签：
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( + "/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(); } }}标签：
原文地址：http://www.cnblogs.com/zhengyanyan/p/5457367.html
