在8.0的系统版本中，安装apk时有一层膜，现在就要捅了它，不然就是一闪而过，安装不上。这层膜就是允许安装未知应用
在8.0中这个选项默认是false，只需要打开一次即可
1、manifest中添加权限
<!-- 8.0安装未知应用来源 --> <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>
2、判断是不是8.0
if (Build.VERSION.SDK_INT >= 26) { boolean b = context.getPackageManager().canRequestPackageInstalls(); if (b) { installApk();//安装应用 } else { //请求安装未知应用来源的权限 ActivityCompat.requestPermissions(ActivityUtil.getCurrentActivity(), new String[]{Manifest.permission.REQUEST_INSTALL_PACKAGES}, INSTALL_PACKAGES_REQUESTCODE); dialog.dismiss(); } else { installApk(); dialog.dismiss(); }
处理回调
@Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); switch (requestCode) { case INSTALL_PACKAGES_REQUESTCODE: if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { installApk(); } else { Intent intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES); startActivityForResult(intent, GET_UNKNOWN_APP_SOURCES); } break; } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); switch (requestCode) { case GET_UNKNOWN_APP_SOURCES: installApk(); break; } }
