Question

我正在开发一个移动应用程序，该应用程序允许用户导入html文件并将其保存在我的数据库中。现在，我一直在研究如何将html文件从文件管理器导入后解析为字符串。我使用了文件选择器，现在可以从手机文件中选择html。
如何将html解析为字符串？
我实际上找到了一些答案，但是所有答案都没有帮助我。此代码是我从文件管理器中选择文件的地方。我在互联网上找到了一些答案，并在代码中应用了它，但仍然不允许我将解析的文件显示到.xml中。我想我没有正确使用选择的文件。请帮助我。

   private ProgressDialog mProgressDialog;
private ArrayList <String> sNameList=new ArrayList <>(  );
private ArrayList <String> sIdList=new ArrayList <>(  );
private ArrayList <String> sCourseList = new ArrayList <>(  );
Button btnImport;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate( savedInstanceState );
    setContentView( R.layout.activity_subject_class_list );

    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M && checkSelfPermission( Manifest.permission.WRITE_EXTERNAL_STORAGE )
            != PackageManager.PERMISSION_GRANTED)
    {
        requestPermissions( new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1001);
    }

    Toolbar myToolbar =  findViewById( R.id.toolbarAct );
    setSupportActionBar( myToolbar );

    if (getSupportActionBar()!= null )
    {

        ActionBar actionBar = getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled( true );
    }

    getSupportActionBar().setTitle( "[CLASS NAME]" );

    btnImport = findViewById( R.id.btn_import );

    btnImport.setOnClickListener( new View.OnClickListener() {
        @Override
        public void onClick(View v) {


            new MaterialFilePicker()
                    .withActivity(subject_class_list.this)
                    .withRequestCode(1000)
                    .withHiddenFiles(true) // Show hidden files and folders
                    .start();
        }
    } );
}

//public void onBackPressed(){
//    moveTaskToBack( true );
//    super.onBackPressed();
//}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult( requestCode, resultCode, data );

    if (requestCode == 1000 && resultCode == RESULT_OK) {
        String filePath = data.getStringExtra( FilePickerActivity.RESULT_FILE_PATH );
        // Do anything with file

    doInBackground( filePath );

    }
}

protected Void doInBackground(String params)
{
    Document mfile = (Document) Jsoup.parse( params );
    Elements mElementsDataSize = (Elements) mfile.getElementsByTagName( "table[border=0 cellspacing=2]");

    int mElementSize = mElementsDataSize.size();
    for (int i = 0; i < mElementSize; i++)
    {
        Elements sNameLoadList = (Elements) mfile.getElementsByTagName( "a[title=Click here to view the student schedule]" );
        String StudentName = sNameLoadList.text();

       // Elements sIdList = (Elements) mfile.getElementsByTagName(  );
        //String StudentID = sIdList.text();

        //Elements sCourseList = (Elements) mfile.getElementsByTagName(  );
      //  String StudentCourse = sCourseList.text();

       sNameList.add( StudentName );
    }

    return null;
}

protected void onPostExecute(Void result)
{
    RecyclerView mRecyclerView = (RecyclerView)findViewById( R.id.act_recycleview );
    DataAdapter mDataAdapter = new DataAdapter( subject_class_list.this , sNameList );
    RecyclerView.LayoutManager mLayoutManager =new LinearLayoutManager( getApplicationContext() );
    mRecyclerView.setLayoutManager( mLayoutManager );
    mRecyclerView.setAdapter( mDataAdapter );
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode)
    {
        case 1001:
        {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED)
            {
                Toast.makeText( this, "Permission granted.", Toast.LENGTH_SHORT ).show();
            }
            else
            {
                Toast.makeText( this, "Permission not granted.", Toast.LENGTH_SHORT ).show();
            }
        }
    }
}

Answer 1

使用jsoup库，您可以轻松解析HTML文件的内容，这里的链接可以帮助您 https://medium.com/@ssaurel/learn-to-parse-html-pages-on-android-with-jsoup-2a9b0da0096f

从手机的文件管理器将html文件解析为字符串

1 个答案: