How to check if a TextView's text exceeds the max lines

Question

Is there a way to check if a TextView's text exceeds the max lines? I've found TextView.getLineCount() but this can only tell me if I am using the max lines, not if I have exceeded it.

EDIT:
So far, I have:

text_view.post(new Runnable() {
            @Override
            public void run() {
                if (text_view.getLineCount() < text_view.getMaxLines()) {
                    // do stuff
                }
            }
});

But this does not detect if it exceeds max lines, i.e. the if statement will pass if it uses greater than or equal to max lines. This is because if it uses exceeds max lines then getLineCount just returns exactly max lines, never more.

Note that the text view's text is set programmatically higher up in my code, not hardcoded in the XML.

Answer 1

Not sure if there is a better way, but I got it by checking what will happen if I set the maxLines to be higher, and see if after measuring it will still fit in the original maxLines.

If you want to also animate nicely from collapsed to expanded mode of the TextView, check out my solution here.

If not, here's my solution for this very specific question :

MainActivity.kt

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val expectedWidthOfTextView = resources.displayMetrics.widthPixels
        val originalMaxLines = textView.maxLines
        if (originalMaxLines < 0 || originalMaxLines == Integer.MAX_VALUE)
            Log.d("AppLog", "already unbounded textView maxLines")
        else {
            textView.maxLines = originalMaxLines + 1
            textView.measure(
                View.MeasureSpec.makeMeasureSpec(expectedWidthOfTextView, View.MeasureSpec.AT_MOST),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)
            )
            Log.d("AppLog", "lines:${textView.lineCount}/$originalMaxLines")
            if (textView.lineCount <= originalMaxLines)
                Log.d("AppLog", "fit in original maxLines")
            else
                Log.d("AppLog", "exceeded original maxLines")
            textView.maxLines = originalMaxLines
        }

    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent" android:orientation="vertical" android:gravity="center"
        android:layout_height="match_parent"
        tools:context=".MainActivity">

    <TextView
            android:id="@+id/textView" android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp" android:background="#1100ff00"
            android:ellipsize="end" android:maxLines="4"
            android:paddingEnd="16dp" android:paddingStart="16dp"
            android:textColor="#c1000000" android:textSize="14sp"
            android:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."/>

</LinearLayout>