Android实现应用下载并自动安装apk包

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安装：

String str = "/CanavaCancel.apk"; String fileName = Environment.getExternalStorageDirectory() + str; Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(new File(fileName)), "application/vnd.android.package-archive"); startActivity(intent);

卸载：

Uri packageURI = Uri.parse("package:com.demo.CanavaCancel");   Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);   startActivity(uninstallIntent);

下载部分：

protected File downLoadFile(String httpUrl) {                // TODO Auto-generated method stub                final String fileName = "updata.apk";                File tmpFile = new File("/sdcard/update");                if (!tmpFile.exists()) {                        tmpFile.mkdir();                }                final File file = new File("/sdcard/update/" + fileName);                try {                        URL url = new URL(httpUrl);                        try {                                HttpURLConnection conn = (HttpURLConnection) url                                                .openConnection();                                InputStream is = conn.getInputStream();                                FileOutputStream fos = new FileOutputStream(file);                                byte[] buf = new byte[256];                                conn.connect();                                double count = 0;                                if (conn.getResponseCode() >= 400) {                                        Toast.makeText(Main.this, "连接超时", Toast.LENGTH_SHORT)                                                        .show();                                } else {                                        while (count <= 100) {                                                if (is != null) {                                                        int numRead = is.read(buf);                                                        if (numRead <= 0) {                                                                break;                                                        } else {                                                                fos.write(buf, 0, numRead);                                                        }                                                } else {                                                        break;                                                }                                        }                                }                                conn.disconnect();                                fos.close();                                is.close();                        } catch (IOException e) {                                // TODO Auto-generated catch block                                e.printStackTrace();                        }                } catch (MalformedURLException e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                }                return file;        }//打开APK程序代码private void openFile(File file) {                // TODO Auto-generated method stub                Log.e("OpenFile", file.getName());                Intent intent = new Intent();                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);                intent.setAction(android.content.Intent.ACTION_VIEW);                intent.setDataAndType(Uri.fromFile(file),                                "application/vnd.android.package-archive");                startActivity(intent);        }

完整代码：

package com.isufe.edu;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import android.annotation.SuppressLint;import android.app.Activity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.util.Log;import android.widget.TextView;import android.widget.Toast;public class DownloadActivity extends Activity {private String strURL = "";File file2 = new File(Environment.getExternalStorageDirectory() + "");private int downloaded = 0;private TextView processTv;Handler handler = new Handler(){public void handleMessage(android.os.Message msg) {Bundle bundle = msg.getData();int process = bundle.getInt("process");//System.out.println("Handler进度："+process);processTv.setText("正在下载："+process+"%");};};@SuppressLint("SetJavaScriptEnabled")@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_download);processTv = (TextView) findViewById(R.id.download_process);Intent intent = getIntent();strURL = intent.getStringExtra("url");if (!strURL.equals("")) {new Thread() {public void run() {openFile(downLoadFile(strURL));};}.start();}}protected File downLoadFile(String httpUrl) {// TODO Auto-generated method stubfinal String fileName = "isufe.apk";File tmpFile = new File("/sdcard/isufe");if (!tmpFile.exists()) {tmpFile.mkdir();}final File file = new File("/sdcard/isufe/" + fileName);long fileLength = 0l;try {URL url = new URL(httpUrl);try {HttpURLConnection conn = (HttpURLConnection) url.openConnection();InputStream is = conn.getInputStream();FileOutputStream fos = new FileOutputStream(file);byte[] buf = new byte[256];conn.connect();double count = 0;if (conn.getResponseCode() >= 400) {Toast.makeText(DownloadActivity.this, "连接超时",Toast.LENGTH_SHORT).show();} else {fileLength = conn.getContentLength();int fileDownload = 0;//System.out.println("文件大小："+fileLength);while (count <= 100) {if (is != null) {Message msg = new Message();Bundle bundle = new Bundle();int numRead = is.read(buf);fileDownload = fileDownload + numRead;downloaded = (int) (fileDownload*100/fileLength);//System.out.println("已下载："+downloaded+"");bundle.putInt("process", downloaded);msg.setData(bundle);handler.sendMessage(msg);if (numRead <= 0) {break;} else {fos.write(buf, 0, numRead);}} else {break;}}}conn.disconnect();fos.close();is.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}} catch (MalformedURLException e) {// TODO Auto-generated catch blocke.printStackTrace();}return file;}// 打开APK程序代码private void openFile(File file) {// TODO Auto-generated method stubLog.e("OpenFile", file.getName());Intent intent = new Intent();intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setAction(android.content.Intent.ACTION_VIEW);intent.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive");startActivity(intent);}}

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