Custom ProgressBar with progressDrawable

To implement our custom ProgressBar, create a drawable xml under /res/drawable/.

res/drawable/myprogressbar.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape>
            <corners android:radius="10dip" />
            <gradient
                android:startColor="#000000"
                android:centerColor="#FF0000"
                android:centerY="1.0"
                android:endColor="#B0B0B0"
                android:angle="180"
                />
        </shape>
    </item>
    <item android:id="@android:id/progress">
        <clip>
            <shape>
                <corners android:radius="10dip" />
                <gradient
                    android:startColor="#101010"
                    android:centerColor="#808080"
                    android:centerY="1.0"
                    android:endColor="#F0F0F0"
                    android:angle="270"
                    />
            </shape>
        </clip>
    </item>
</layer-list>

Edit the layout to add android:progressDrawable

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="20dp"
    android:orientation="vertical"
    tools:context="com.blogspot.android_er.androidprogressbar.MainActivity">

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:autoLink="web"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold"
        />

    <Button
        android:id="@+id/startprogress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Start ProgressBar"/>

    <ProgressBar
        android:id="@+id/progressbar"
        style="@android:style/Widget.ProgressBar.Horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:progress="0"
        android:visibility="gone"/>

    <ProgressBar
        android:id="@+id/myprogressbar"
        style="@android:style/Widget.ProgressBar.Horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:progress="0"
        android:visibility="gone"
        android:progressDrawable="@drawable/myprogressbar"/>

</LinearLayout>

MainActivity.java

package com.blogspot.android_er.androidprogressbar;

import android.os.AsyncTask;
import android.os.Bundle;
import android.os.SystemClock;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;

public class MainActivity extends AppCompatActivity {

    Button btnStartProgress;
    ProgressBar progressBar, myProgressBar;

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

        btnStartProgress = (Button)findViewById(R.id.startprogress);
        progressBar = (ProgressBar)findViewById(R.id.progressbar);
        myProgressBar = (ProgressBar)findViewById(R.id.myprogressbar);


        btnStartProgress.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                btnStartProgress.setEnabled(false);
                MyAsyncTask myAsyncTask = new MyAsyncTask();
                myAsyncTask.execute();
            }
        });
    }

    public class MyAsyncTask extends AsyncTask<Void, Integer, Void> {

        @Override
        protected void onPreExecute() {
            myProgressBar.setVisibility(View.VISIBLE);
            myProgressBar.setProgress(0);
            progressBar.setVisibility(View.VISIBLE);
            progressBar.setProgress(0);
        }

        @Override
        protected Void doInBackground(Void... voids) {
            for(int i=0; i<100; i++){
                publishProgress(i);
                SystemClock.sleep(100);
            }
            return null;
        }

        @Override
        protected void onProgressUpdate(Integer... values) {
            myProgressBar.setProgress(values[0]);
            progressBar.setProgress(values[0]);
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            myProgressBar.setVisibility(View.GONE);
            progressBar.setVisibility(View.GONE);
            btnStartProgress.setEnabled(true);
        }
    }
}

Next:
- ProgressBar with SecondaryProgress
- Custom ProgressBar with SecondaryProgress