Android无法安装apk,8.0未知来源应用安装权限

Android 新版本的出现 ，适配Android8.0未知来源应用安装权限处理

1、在清单文件中增加请求安装权限

<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />

private void showChangCityDialog() {
    
    CustomDialog.Builder builder = new CustomDialog.Builder(mContext);
    builder.setTitleStr("提示");
    builder.setBodysStr("安装应用需要打开未知来源权限，请去设置中开启权限");
    builder.setLeftbtnStr("取消");
    builder.setRightbtnStr("设置");
    builder.setLeftBtnColor(R.color.color_333333);
    builder.setrRightBtnColor(R.color.C6);
    builder.setOnClickListener(new CustomDialog.DialogOnItemClickListener() {
        @Override
        public void leftClick() {
            finish();
        }

        @Override
        public void rightClick() {
            //兼容8.0
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                boolean hasInstallPermission = mContext.getPackageManager().canRequestPackageInstalls();
                if (!hasInstallPermission) {
                    startInstallPermissionSettingActivity();
                } else {
                    //再次执行安装流程，包含权限判等
                    if (!TextUtils.isEmpty(appUrl)) {
                        //再次启动安装流程
                        installApk(appUrl);
                    }
                }
            }
        }
    });
    builder.create().show();
}

/**
 * 跳转到设置-允许安装未知来源-页面
 */
@RequiresApi(api = Build.VERSION_CODES.O)
private void startInstallPermissionSettingActivity() {

    Uri packageURI = Uri.parse("package:" + BuildConfig.APPLICATION_ID);
    //注意这个是8.0新API
    Intent intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES, packageURI);
    startActivityForResult(intent, 1);

}