Nesse tutorial vou descrever como fazer para tocar áudio e vídeo no android com Java num aplicativo bem simples para ver como funciona o MediaPlayer.
Primeiramente neste aplicativo vamos criar a pasta raw dentro da pasta res para poder copiar e colar um vídeo e uma música.
Ficando da seguinte maneira.
Logo depois de ter criado a pasta raw você deve copiar e colar um arquivo de música(mp3) e um vídeo(mp4) dentro da pasta como na imagem a seguir.
Então chegou a hora de copiar uma imagem para dentro da pasta drawable e criar 4 Vector Aset de sua preferência para utilizar no projeto com os seguintes nomes.
Logo após ter criado a pasta raw e copiado todos os arquivos chegou a hora de programar.
Vamos então criar alguns arquivos de layout com os seguintes nomes e conteúdo.
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
android:orientation="vertical">
<androidx.appcompat.widget.AppCompatSeekBar
android:id="@+id/seekVolume"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:rotation="270"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:layout_marginEnd="250dp" />
<SeekBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="200dp"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/tvTime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Pause"
android:textSize="20sp"
app:layout_constraintBottom_toTopOf="@id/progressBar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<LinearLayout
android:id="@+id/layButtons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:gravity="center"
app:layout_constraintTop_toBottomOf="@id/progressBar">
<ImageButton
android:id="@+id/btnPlay"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_play" />
<ImageButton
android:id="@+id/btnPause"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_pause" />
<ImageButton
android:id="@+id/btnStop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_stop" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout><?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<Button
android:id="@+id/btnAudio"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Audio"/>
<Button
android:id="@+id/btnImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Image"/>
<Button
android:id="@+id/btnVideo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Video"/>
</LinearLayout><?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/logo_new"/>
</androidx.constraintlayout.widget.ConstraintLayout><?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:contextClickable="true">
<VideoView
android:id="@+id/videoView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>Logo depois vamos deixar nossa activity_main.xml da seguinte maneira.
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_weight="3">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/ic_android"
android:padding="16dp"
android:layout_weight="1"/>
<TextView
android:id="@+id/txTitle"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Escolha a opção"
android:textColor="#000"
android:textSize="20sp"
android:textStyle="bold"
android:gravity="center"
android:layout_weight="1"/>
</LinearLayout>
<ViewFlipper
android:id="@+id/vf"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1">
<include layout="@layout/base"/>
<include layout="@layout/audio"/>
<include layout="@layout/image"/>
<include layout="@layout/video"/>
</ViewFlipper>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>Então agora vamos colocar tudo em prática deixando nossa MainActivity com o seguinte código para executar as funções do aplicativo.
package br.com.uware.taiv;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.MediaController;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.VideoView;
import android.widget.ViewFlipper;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
private MediaPlayer mediaPlayer;
private SeekBar seekVolume;
private AudioManager audioManager;
private SeekBar progressBar;
private TextView tvTime;
private ViewFlipper vf;
private TextView txTitle;
ImageButton btnPlay, btnPause, btnStop;
private VideoView videoView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnAudio = findViewById(R.id.btnAudio);
Button btnImage = findViewById(R.id.btnImage);
Button btnVideo = findViewById(R.id.btnVideo);
txTitle = findViewById(R.id.txTitle);
vf = findViewById(R.id.vf);
btnPlay = findViewById(R.id.btnPlay);
btnPause =findViewById(R.id.btnPause);
btnStop = findViewById(R.id.btnStop);
progressBar = findViewById(R.id.progressBar);
tvTime = findViewById(R.id.tvTime);
initSeekBar();
audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
int volMax = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
int volNow = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
seekVolume.setMax(volMax);
seekVolume.setProgress(volNow);
mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.music);
videoView = findViewById(R.id.videoView);
videoView.setMediaController(new MediaController(this));
btnAudio.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkPlay();
txTitle.setText("Audio");
vf.setDisplayedChild(1);
}
});
btnImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkPlay();
txTitle.setText("Image");
vf.setDisplayedChild(2);
}
});
btnVideo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
checkPlay();
txTitle.setText("Video");
vf.setDisplayedChild(3);
videoView.setVideoPath("android.resource://" + getPackageName() + "/" + R.raw.video);
}
});
btnPlay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
playSong();
}
});
btnPause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
pauseSong();
}
});
btnStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
stopSong();
}
});
seekVolume.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, i, AudioManager.FLAG_SHOW_UI);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
progressBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
if(b){
mediaPlayer.seekTo(i);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
}
private void initSeekBar(){
seekVolume = findViewById(R.id.seekVolume);
}
private Handler handler = new Handler();
private Runnable update;
public void play(){
progressBar.setMax(mediaPlayer.getDuration());
update = new Runnable() {
@Override
public void run(){
SimpleDateFormat sdf = new SimpleDateFormat("mm:ss");
Date d = new Date(mediaPlayer.getCurrentPosition());
tvTime.setText(sdf.format(d));
progressBar.setProgress(mediaPlayer.getCurrentPosition());
handler.postDelayed( this, 1000);
}
};
handler.postDelayed(update,100);
}
public void playSong(){
if(mediaPlayer != null) {
mediaPlayer.start();
play();
}
else{
mediaPlayer = MediaPlayer.create(getApplicationContext(),R.raw.music);
play();
}
}
public void pauseSong(){
if(mediaPlayer.isPlaying()){
mediaPlayer.pause();
}
}
public void stopSong(){
mediaPlayer.stop();
mediaPlayer = MediaPlayer.create(getApplicationContext(),R.raw.music);
}
public void checkPlay(){
if (mediaPlayer.isPlaying()) {
stopSong();
}
if(videoView.isPlaying()){
videoView.stopPlayback();
}
}
@Override
public void onBackPressed() {
checkPlay();
vf.setDisplayedChild(0);
}
}
Enfim espero poder ter ajudado nesse tutorial sobre tocar áudio e vídeo no android com Java e que você tenha entendido como funciona a biblioteca do MediaPlayer e suas funções com threads.
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