项目开发使用模板：Android代码实现APK下载安装（代码依赖包afinal_0.5_bin.jar,可资源下载）
<span style="white-space:pre"></span>protected void showUpdateDialog() {<span style="white-space:pre"></span>//this = Activity.this<span style="white-space:pre"></span>AlertDialog.Builder builder = new Builder(SplashActivity.this);<span style="white-space:pre"></span>builder.setTitle("提示升级");//<span style="white-space:pre"></span>builder.setCancelable(false);//强制升级<span style="white-space:pre"></span>builder.setOnCancelListener(new OnCancelListener() {<span style="white-space:pre"></span><span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onCancel(DialogInterface dialog) {<span style="white-space:pre"></span>// TODO Auto-generated method stub<span style="white-space:pre"></span>//无操作或者返回就代替用户做选择，进入主页面<span style="white-space:pre"></span>enterHome();<span style="white-space:pre"></span>dialog.dismiss();<span style="white-space:pre"></span><span style="white-space:pre"></span>}<span style="white-space:pre"></span>});<span style="white-space:pre"></span>builder.setMessage(description);<span style="white-space:pre"></span>builder.setPositiveButton("立刻升级", new OnClickListener() {<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onClick(DialogInterface dialog, int which) {<span style="white-space:pre"></span>// 下载APK，，并且替换安装<span style="white-space:pre"></span>if (Environment.getExternalStorageState().equals(<span style="white-space:pre"></span>Environment.MEDIA_MOUNTED)) {<span style="white-space:pre"></span>// sdcard存在<span style="white-space:pre"></span>// afnal<span style="white-space:pre"></span>FinalHttp finalhttp = new FinalHttp();<span style="white-space:pre"></span>finalhttp.download(apkurl, Environment<span style="white-space:pre"></span>.getExternalStorageDirectory().getAbsolutePath()+"/mobilesafe2.0.apk",<span style="white-space:pre"></span>new AjaxCallBack<File>() {<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onFailure(Throwable t, int errorNo,<span style="white-space:pre"></span>String strMsg) {<span style="white-space:pre"></span>t.printStackTrace();<span style="white-space:pre"></span>Toast.makeText(getApplicationContext(), "下载失败", 1).show();<span style="white-space:pre"></span>super.onFailure(t, errorNo, strMsg);<span style="white-space:pre"></span>}<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onLoading(long count, long current) {<span style="white-space:pre"></span>// TODO Auto-generated method stub<span style="white-space:pre"></span>super.onLoading(count, current);<span style="white-space:pre"></span>tv_update_info.setVisibility(View.VISIBLE);<span style="white-space:pre"></span>//当前下载百分比<span style="white-space:pre"></span>int progress = (int) (current * 100 / count);<span style="white-space:pre"></span>tv_update_info.setText("下载进度："+progress+"%");<span style="white-space:pre"></span>}<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onSuccess(File t) {<span style="white-space:pre"></span>// TODO Auto-generated method stub<span style="white-space:pre"></span>super.onSuccess(t);<span style="white-space:pre"></span>installAPK(t);<span style="white-space:pre"></span>}<span style="white-space:pre"></span>/**<span style="white-space:pre"></span> * 安装APK<span style="white-space:pre"></span> * @param t<span style="white-space:pre"></span> */<span style="white-space:pre"></span>private void installAPK(File t) {<span style="white-space:pre"></span> Intent intent = new Intent();<span style="white-space:pre"></span> intent.setAction("android.intent.action.VIEW");<span style="white-space:pre"></span> intent.addCategory("android.intent.category.DEFAULT");<span style="white-space:pre"></span> intent.setDataAndType(Uri.fromFile(t), "application/vnd.android.package-archive");<span style="white-space:pre"></span> <span style="white-space:pre"></span> startActivity(intent);<span style="white-space:pre"></span> <span style="white-space:pre"></span>}<span style="white-space:pre"></span><span style="white-space:pre"></span><span style="white-space:pre"></span>});<span style="white-space:pre"></span>} else {<span style="white-space:pre"></span>Toast.makeText(getApplicationContext(), "没有sdcard，请安装上在试",<span style="white-space:pre"></span>0).show();<span style="white-space:pre"></span>return;<span style="white-space:pre"></span>}<span style="white-space:pre"></span>}<span style="white-space:pre"></span>});<span style="white-space:pre"></span>builder.setNegativeButton("下次再说", new OnClickListener() {<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onClick(DialogInterface dialog, int which) {<span style="white-space:pre"></span>// TODO Auto-generated method stub<span style="white-space:pre"></span>dialog.dismiss();<span style="white-space:pre"></span>enterHome();// 进入主页面<span style="white-space:pre"></span>}<span style="white-space:pre"></span>});<span style="white-space:pre"></span>builder.show();<span style="white-space:pre"></span>}
真正的爱，应该超越生命的长度、心灵的宽度、灵魂的深度
