Example
MainActivity.java:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
tools:context=".MainActivity">
<com.customthemeattributedemo.customview.CustomTextView
style="?mediumTextStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:text="@string/message_hello"
custom:font_family="@string/bold_font" />
<com.customthemeattributedemo.customview.CustomTextView
style="?largeTextStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:text="@string/message_hello"
custom:font_family="@string/bold_font" />
</LinearLayout>
CustomTextView.java:
public class CustomTextView extends TextView {
private static final String TAG = "TextViewPlus";
private Context mContext;
public CustomTextView(Context context) {
super(context);
mContext = context;
}
public CustomTextView(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
setCustomFont(context, attrs);
}
public CustomTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mContext = context;
setCustomFont(context, attrs);
}
private void setCustomFont(Context ctx, AttributeSet attrs) {
TypedArray customFontNameTypedArray = ctx.obtainStyledAttributes(attrs, R.styleable.CustomTextView);
String customFont = customFontNameTypedArray.getString(R.styleable.CustomTextView_font_family);
Typeface typeface = null;
typeface = Typeface.createFromAsset(ctx.getAssets(), customFont);
setTypeface(typeface);
customFontNameTypedArray.recycle();
}
}
attrs.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<attr name="mediumTextStyle" format="reference" />
<attr name="largeTextStyle" format="reference" />
<declare-styleable name="CustomTextView">
<attr name="font_family" format="string" />
<!--- Your other attributes -->
</declare-styleable>
</resources>
strings.xml:
<resources>
<string name="app_name">Custom Style Theme Attribute Demo</string>
<string name="message_hello">Hello Hiren!</string>
<string name="bold_font">bold.ttf</string>
</resources>
styles.xml:
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="mediumTextStyle">@style/textMedium</item>
<item name="largeTextStyle">@style/textLarge</item>
</style>
<style name="textMedium" parent="textParentStyle">
<item name="android:textAppearance">@android:style/TextAppearance.Medium</item>
</style>
<style name="textLarge" parent="textParentStyle">
<item name="android:textAppearance">@android:style/TextAppearance.Large</item>
</style>
<style name="textParentStyle">
<item name="android:textColor">@android:color/white</item>
<item name="android:background">@color/colorPrimary</item>
<item name="android:padding">5dp</item>
</style>
</resources>
