gistfile1.txt

protected void installApk(File file) {
        Intent intent = new Intent();
        //執行動作
        intent.setAction(Intent.ACTION_VIEW);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        //執行類型
        if (Build.VERSION.SDK_INT >= 24) {
            Uri apkuri = FileProvider.getUriForFile(Option.this, getApplicationContext().getPackageName() + ".provider", file);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.setDataAndType(apkuri, "application/vnd.android.package-archive");
        }
        else
            intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");

        Option.this.startActivity(intent);
    }