/**         * 安装apk         *          * @param file 要安装的APK文件         */        private void install(File file) {            Intent intent = new Intent();            intent.setAction(Intent.ACTION_VIEW);            intent.setDataAndType(Uri.fromFile(file),                    "application/vnd.android.package-archive");            finish();            startActivity(intent);        }

Intent shareIntent = new Intent();            shareIntent.setAction(Intent.ACTION_SEND);            shareIntent.setType("text/plain");            // 需要指定意图的数据类型            shareIntent.putExtra(Intent.EXTRA_SUBJECT, "分享");            shareIntent.putExtra(Intent.EXTRA_TEXT,                    "推荐你使用一个程序" + item.getAppname());            shareIntent = Intent.createChooser(shareIntent, "分享");            startActivity(shareIntent);

String uristr = "package:" + packname;                Uri uri = Uri.parse(uristr);                Intent deleteIntent = new Intent();                deleteIntent.setAction(Intent.ACTION_DELETE);                deleteIntent.setData(uri);                startActivityForResult(deleteIntent, 0);

try {                PackageInfo info = getPackageManager().getPackageInfo(                        packname,                        PackageManager.GET_UNINSTALLED_PACKAGES                                | PackageManager.GET_ACTIVITIES);                ActivityInfo[] activityinfos = info.activities;                if (activityinfos.length > 0) {                    ActivityInfo startActivity = activityinfos[0];                    Intent intent = new Intent();                    intent.setClassName(packname, startActivity.name);                    startActivity(intent);                } else {                    Toast.makeText(this, "当前应用程序无法启动", 0).show();                }            } catch (Exception e) {                Toast.makeText(this, "应用程序无法启动", 0).show();                e.printStackTrace();            }