thedoapps

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item>
        <shape>
            <gradient android:angle="90" android:endColor="@color/white_5" android:startColor="@color/black_50" android:type="linear" />
        </shape>
    </item>

</selector>

thedoapps

<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- Estado Presionado -->
    <item android:state_pressed="true">
        <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
            <item>
                <shape android:shape="rectangle">
                    <corners android:radius="10dp" />

thedoapps

 <Button
            android:id="@+id/btn_ok"
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:padding="10dp"
            android:background="@drawable/selector_btn_red"
            android:textColor="@color/white"
            android:text="@string/ok"/>

thedoapps

RequestQueue requestQueue = Volley.newRequestQueue(this);
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(
                        Request.Method.POST,
                        "github.com/api/login",
                        new Response.Listener<JSONObject>() {
                            @Override
                            public void onResponse(JSONObject response) {
                                Log.e("LOGIN", response.toString());
                            }
                        },

thedoapps

package pe.taxiapp.client.widget;

/**
 * Created by doapps on 9/9/15.
 */

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Typeface;
import android.text.Spannable;

thedoapps

files uploaded.