TextView（文本）

<TextView
        android:id="@+id/textName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/themeRed"
        android:gravity="center"
        android:text="longma"
        android:textColor="@color/themeMain"
        android:textSize="24sp" />



        TextView textName = findViewById(R.id.textName);
        textName.setText("更新文本");
        textName.setTextSize(24);
        textName.setGravity(Gravity.RIGHT);
        textName.setTextColor(Color.WHITE);