Can't set TextView to VISIBLE

Question

I set the following to visible in my onCreate method.

findViewById(R.id.noDesignsCallToAction).setVisibility(View.VISIBLE);

In the XML, the view is set to visibility gone.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:weightSum="1"
    android:orientation="vertical"
    android:layout_below="@id/toolbar"
    android:id="@+id/linearLayout">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/go_ahead_create_something_n_it_s_really_easy_n_just_click_here_to_get_started"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:id="@+id/noDesignsCallToAction"
            android:padding="10dp"
            android:textSize="14sp"
            android:typeface="sans"
            android:visibility="gone"
            android:onClick="LaunchCustomizer"
            android:gravity="center_vertical|center_horizontal" />

</LinearLayout>

Why won't the textview appear as visible in my app?

Answer 1

Make sure you set the content view first. Otherwise you'll get an NPE as a result of the ID not being found in the active layout.

Use an instance (don't call findViewById(id).setVisibility() as it uses more memory compared to caching the TextView as a field) and then set the visibility.

setContentView(R.layout.layout);
TextView temp = (TextView) findViewById(R.id.noDesignsCallToAction);
temp.setVisibility(View.VISIBLE);

Answer 2

Inflate it and then set its visibility.

    setContentView(R.layout.something);

TextView tv = (TextView)   findView...;     

tv.setVisibility(View.VISIBLE);

and maybe string res is empty ?

Answer 3

在布局文件中更改textview的textColor或检查是否有任何视图与textview不重叠。