android intent安装apk

/**
     * 安装apk
     *
     * @param context
     * @param apkPath
     */
    public static void installApk(Context context, String apkPath) {
        try {
            /**
             * provider
             * 处理android 7.0 及以上系统安装异常问题
             */
            File file = new File(apkPath);
            Intent install = new Intent();
            install.setAction(Intent.ACTION_VIEW);
            install.addCategory(Intent.CATEGORY_DEFAULT);
            install.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                Uri apkUri = FileProvider.getUriForFile(context, "com.jxzg.jxzgapp.fileprovider", file);//在AndroidManifest中的android:authorities值
                Log.d("======", "apkUri=" + apkUri);
                install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);//添加这一句表示对目标应用临时授权该Uri所代表的文件
                install.setDataAndType(apkUri, "application/vnd.android.package-archive");
            } else {
                install.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
            }
            context.startActivity(install);
        } catch (Exception e) {
            Log.d("======", e.getMessage());
            Toast.makeText(context, "文件解析失败", Toast.LENGTH_SHORT).show();
            deleteFile(apkPath);
        }
    }

<provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="com.chao.app.fileprovider"
        android:grantUriPermissions="true"
        android:exported="false">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths" />
 </provider>

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

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <paths>
        <external-path path="" name="download" />
    </paths>
</resources>