@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Dialog dialog = new AlertDialog.Builder(Cockhorse.this) .setTitle("系统更新") .setMessage("发现新版本,请更新!") // 设置内容 .setPositiveButton("确定",// 设置确定按钮 new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { pBar = new ProgressDialog(Cockhorse.this); pBar.setTitle("正在下载"); pBar.setMessage("请稍候…"); pBar.setProgressStyle(ProgressDialog.STYLE_SPINNER); downFile("http://192.168.1.103:80/gzzd/androidapk/飞哥.apk"); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // 点击"取消"按钮之后退出程序 } }).create();// 创建 // 显示对话框 dialog.show(); // new Thread(new MyThread()).start(); } void downFile(final String url) { pBar.show(); new Thread() { public void run() { HttpClient client = new DefaultHttpClient(); // params[0]代表连接的url HttpGet get = new HttpGet(url); HttpResponse response; try { response = client.execute(get); HttpEntity entity = response.getEntity(); long length = entity.getContentLength(); InputStream is = entity.getContent(); FileOutputStream fileOutputStream = null; if (is != null) { File file = new File( Environment.getExternalStorageDirectory(), "Cockhorse.apk"); fileOutputStream = new FileOutputStream(file); byte[] buf = new byte[1024]; int ch = -1; int count = 0; while ((ch = is.read(buf)) != -1) { fileOutputStream.write(buf, 0, ch); count += ch; if (length > 0) { } } } fileOutputStream.flush(); if (fileOutputStream != null) { fileOutputStream.close(); } down(); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }.start(); } void down() { handler.post(new Runnable() { public void run() { pBar.cancel(); update(); } }); } void update() { Intent intent = new Intent(Intent.ACTION_VIEW); // intent.setDataAndType(Uri.fromFile(new // File("/sdcard/Feige.apk")), // "http://192.168.1.103:80/gzzd/androidapk/Feige.apk"); intent.setDataAndType(Uri.fromFile(new File("/sdcard/飞哥.apk")), "application/vnd.android.package-archive"); startActivity(intent); }
来源:http://blog.csdn.net/w200221626/article/details/6690769