How to stop and start an online stream in android

Question

I'm Building an android app that is supposed to stream an online radio station from a URL.

I am currently working on a demo and I have gotten a lot of help from online tutorials but I have a problem.

I want it to stop when I click on my play button the second time and start from where the station is currently when I press the play button again but instead, it pauses and continues from where I stopped not what the station is currently broadcasting.

Although I know I am using mediaPlayer.pause() but when I use mediaPlayer.stop() it doesn't seem to start again.

MainActivity

package com.radline.test.radlinetest;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {


    Button b_play;
    boolean prepared = false;
    boolean started = false;
    MediaPlayer mediaPlayer;

   String stream = "http://stream.radioreklama.bg:80/radio1rock128";

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

        b_play = (Button)findViewById(R.id.b_play);
        b_play.setEnabled(false);
        b_play.setText("LOADING.");

        mediaPlayer = new MediaPlayer();
        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

        new PlayerTask().execute(stream);

        b_play.setOnClickListener(new View.OnClickListener(){
            @Override
                    public void onClick(View view) {
                if (started) {
                    started = false;
                    mediaPlayer.pause();
                    b_play.setText("PLAY");
                }
                else{
                    started = true;
                    mediaPlayer.start();
                    b_play.setText("PAUSE");
                }


            }
        });

    }

    class PlayerTask extends AsyncTask<String, Void, Boolean>{
        @Override
        protected Boolean doInBackground(String... strings) {
            try {
                mediaPlayer.setDataSource(strings[0]);
                mediaPlayer.prepare();
                prepared = true;
            } catch (IOException e) {
                e.printStackTrace();
            }

            return prepared;

        }

        @Override
        protected void onPostExecute(Boolean aBoolean) {
            super.onPostExecute(aBoolean);
            b_play.setEnabled(true);
            b_play.setText("PLAY");
        }
    }


    @Override
    protected void onPause() {
        super.onPause();
        if (started){
            mediaPlayer.pause();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (started){
            mediaPlayer.start();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(prepared){
            mediaPlayer.release();
        }
    }
}

XML

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.radline.test.radlinetest.MainActivity">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="0dp"
        android:layout_height="233dp"
        app:srcCompat="@mipmap/ic_launcher"
        android:layout_marginBottom="8dp"
        app:layout_constraintBottom_toTopOf="@+id/linearLayout"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="8dp"
        app:layout_constraintVertical_bias="0.468"
        tools:layout_constraintRight_creator="1"
        android:layout_marginStart="36dp"
        android:layout_marginEnd="36dp"
        app:layout_constraintRight_toRightOf="parent"
        tools:layout_constraintLeft_creator="1"
        app:layout_constraintLeft_toLeftOf="parent" />

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="360dp"
        android:orientation="horizontal"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:layout_constraintLeft_creator="1"
        tools:layout_constraintRight_creator="1"
        tools:layout_constraintTop_creator="1"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginBottom="50dp"
        app:layout_constraintVertical_bias="0.505">

        <Button
            android:id="@+id/b_previous"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="PREVIOUS" />

        <Button
            android:id="@+id/b_play"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="PLAY" />

        <Button
            android:id="@+id/b_stop"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="STOP" />
    </LinearLayout>

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="VOICE OF UCHE"
        android:textColor="#000000"
        android:textSize="30sp"
        tools:layout_constraintTop_creator="1"
        tools:layout_constraintRight_creator="1"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginTop="32dp"
        tools:layout_constraintLeft_creator="1"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

Can someone please help?

Answer 1

As can be seen from the diagram in the documentation, you have to use prepare() or prepareAsync() before calling start() after stop(). So use stop() and prepare the player again before calling start(). Then it should work as desired.