Difference Between View.invisible And Value Of Android:invisible

I'm new on Android development, so I'm developing an simple application that hides a textview pressing some button, so in the java code in the method for the OnClick event for the

Solution 1:

Both are difference. According to Android Reference

textView.setVisibility(1);

is same with

textView.setVisibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);

If you want to hide the view, use :

textView.setVisibility(View.INVISIBLE);

Or

textView.setVisibility(4);

Solution 2:

This is a good question, I checked the Android source code (frameworks/base/core/java/android/view/View.java)

case com.android.internal.R.styleable.View_visibility:
    finalint visibility = a.getInt(attr, 0);
    if (visibility != 0) {
          viewFlagValues |= VISIBILITY_FLAGS[visibility]; //here is the key to your question
          viewFlagMasks |= VISIBILITY_MASK;
    }
    break;

Here is the content of VISIBILITY_FLAGS:

privatestaticfinalint[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE};

The value of the array elements are actually the value shown in Android Reference

/**
     * This view is visible.
     * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code
     * android:visibility}.
     */publicstaticfinalint VISIBLE = 0x00000000;

    /**
     * This view is invisible, but it still takes up space for layout purposes.
     * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code
     * android:visibility}.
     */publicstaticfinalint INVISIBLE = 0x00000004;

    /**
     * This view is invisible, and it doesn't take any space for layout
     * purposes. Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code
     * android:visibility}.
     */publicstaticfinalint GONE = 0x00000008;

So even if you use the android:invisible in the manifest file, Android framework will finally call setVisibility(...) with the value 4.