TextView 獲取行數，某一行的內容，某行的寬度

獲取行數

ViewTreeObserver vto = textView.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

    @Override
    public void onGlobalLayout() {
        ViewTreeObserver obs = textView.getViewTreeObserver();
        obs.removeGlobalOnLayoutListener(this);
        int lineCount = textview.getLineCount(); //行數

    }
});

//或者
textview.setText(“Some text”);
textview.post(new Runnable() {
    @Override
    public void run() {
        int lineCount = textview.getLineCount();//行數
    }
});

 

final TextView title = (TextView)findViewById(R.id.text);
        title.setText("A really long text");
        ViewTreeObserver vto = title.getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

            @Override
            public void onGlobalLayout() {
                ViewTreeObserver obs = title.getViewTreeObserver();
                obs.removeGlobalOnLayoutListener(this);
                if(title.getLineCount() > 3){
                    Log.d("","Line["+title.getLineCount()+"]"+title.getText());
                    int lineEndIndex = title.getLayout().getLineEnd(2);
                    String text = title.getText().subSequence(0, lineEndIndex-3)+"...";
                    title.setText(text);
                    Log.d("","NewText:"+text);
                }

            }
        });

 

 

 

獲取行的內容和寬度

Layout layout = edit.getLayout();
String text = edit.getText().toString();
int start = 0;
int end;
for (int i = 0; i < edit.getLineCount(); i++) {
    end = layout.getLineEnd(i);
                    
    String line = text.substring(start, end); //指定行的內容
    start = end;
    float width = layout.getLineWidth(i); //指定行的寬度
    
    Log.e("test", line + "," + width);
}