自定义字体仅应用于第一个textview和按钮

Question

Custom font is only applied on the first textView and Button, not on the rest.I had used findViewByid to get the Views. I had used fontFam id for textview and btFontFam for button

xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_marginTop="100dp" >

 <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:textSize="24sp"
    android:text="@string/L1" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:text="@string/LBtn"
    android:textSize="24sp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:text="@string/L2"
    android:textSize="24sp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:text="@string/L3"
    android:textSize="24sp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:text="@string/L4"
    android:textSize="24sp" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:text="@string/SBtn"
    android:textSize="24sp" />

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Typeface tf = Typeface.createFromAsset(getAssets(),
            "Fonts/Roboto-Medium.ttf");

    TextView tv = (TextView) findViewById(R.id.fontFam);
    tv.setTypeface(tf);

    Button bt = (Button) findViewById(R.id.btfontFam);
    bt.setTypeface(tf);

}
}

Answer 1

You should extends the TextView, Button,... class to using custom fonts.

First, add new property to "values/attrs.xml" file:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="TextViewPlus">
        <attr name="customFont" format="string"/>
    </declare-styleable>
</resources>

Second, rewrite the TextView class:

package com.ex.ui;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.widget.TextView;

public class TextViewPlus extends TextView {
    public TextViewPlus(Context context) {
        super(context);
    }

    public TextViewPlus(Context context, AttributeSet attrs) {
        super(context, attrs);
        setCustomFont(context, attrs);
    }

    public TextViewPlus(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setCustomFont(context, attrs);
    }

    private void setCustomFont(Context ctx, AttributeSet attrs) {
        TypedArray a = ctx.obtainStyledAttributes(attrs, R.styleable.TextViewPlus);
        String customFont = a.getString(R.styleable.TextViewPlus_customFont);
        setCustomFont(ctx, customFont);
        a.recycle();
    }

    public boolean setCustomFont(Context ctx, String asset) {
        Typeface tf = null;
        try {
        tf = Typeface.createFromAsset(ctx.getAssets(), asset);  
        } catch (Exception e) {
            return false;
        }
        setTypeface(tf);  
        return true;
    }
}

Then, using with custom font:

<com.ex.ui.TextViewPlus
xmlns:android="http://schemas.android.com/apk/res/android"    
xmlns:app="http://schemas.android.com/apk/res/com.ex"  
android:id="@android:id/text1"    
android:layout_width="match_parent"
android:layout_height="match_parent"
app:customFont="Roboto-Light.ttf"/>

Note:

"xmlns:app="http://schemas.android.com/apk/res/com.ex" => "com.ex" is the main package, that mean you can access the resource via com.ex.R