我想在每次更改文本时突出显示 MultiAutoCompleteTextView 的语法

Question

**我想在每次更改文本时突出显示 MutiAutoCompleteTextView 的语法，我已经尝试过，但我的应用程序在运行时冻结，请帮助我如何做到这一点。 **

MultiAutoCompleteTextView Code;
TextHighlighter Highlighter;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    Code = findViewById(R.id.Code);
    Highlighter = new TextHighlighter();
    Highlighter.setLanguage(Highlighter.JAVA);
    String text=Highlighter.getHighlightedText(Code.getText().toString());
    Code.setText(Html.fromHtml(text));
    
    Code.addTextChangedListener(TextWatcher);

}

private TextWatcher TextWatcher = new TextWatcher()
{

    @Override
    public void beforeTextChanged(CharSequence p1, int p2, int p3, int p4)
    {
        // TODO: Implement this method
    }

    @Override
    public void onTextChanged(CharSequence p1, int p2, int p3, int p4)
    {
        // TODO: Implement this method
    }

    @Override
    public void afterTextChanged(Editable p1)
    {
        if(Code.length() !=0)
        {
            String text=Highlighter.getHighlightedText(Code.getText().toString());
            Code.setText(Html.fromHtml(text));
        }
    }
    
    
};

}

Answer 1

您的应用程序冻结，因为当您使用 Code.setText(Html.fromHtml(text)); 设置文本时，您的 afterTextChanged 将立即调用。所以它将作为无限循环运行。您可以使用标志来控制此流程。

例如：

boolean isHighlighted = false;
private TextWatcher TextWatcher = new TextWatcher()
{
    @Override
    public void beforeTextChanged(CharSequence p1, int p2, int p3, int p4)
    {
    }

    @Override
    public void onTextChanged(CharSequence p1, int p2, int p3, int p4)
    {
        // TODO: Implement this method
    }

    @Override
    public void afterTextChanged(Editable p1)
    {
        String text=Highlighter.getHighlightedText(Code.getText().toString());
        if(Code.length() !=0 && !isHighlighted)
        {
            isHighlighted == true;
            Code.setText(Html.fromHtml(text));
            //setText will resets cursor position, so you have to move the cursor to the end. 
            Code.setSelection(text.length)
        } else {
            isHighlighted = false;
        }
    }        
};