Develop Reference

Android Intent / Start Activity Issue

I'm having an Issue that I have two Activities A and B when I clicked on Button to change an Activity from A to B . It Restart my Application I don't know what going wrong Please help me
public class Login_Choice_Activity extends AppCompatActivity{
private Button d_btn,p_btn;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login__choice);
FindAllView();
p_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// startActivity(new
Intent(Login_Choice_Activity.this,Patient_SignIn_Activity.class));
Toast.makeText(getApplicationContext(),"CLICKED",Toast.LENGTH_LONG).show();
}
});
}
private void FindAllView(){
d_btn = findViewById(R.id.choice_doctor_btn);
p_btn = findViewById(R.id.choice_patient_btn);
}
}
https://i.stack.imgur.com/KcgAh.gif

It could be better if you create a method for opening the new Activity and call it from onClick(View v) method. Example
private void openActivity() {
startActivity(new Intent(this,Patient_SignIn_Activity.class));
}
In your onClick call:
#Override
public void onClick(View v) {
openActivity()
}

Mediaplayer Background Audio not work properly Using URL And Song Not Play Second Time

This is my second activity and when open this activity threw button activity take load and open after some time and some times UI Freeze and some time black screen open for some seconds
public class AartiActivity extends AppCompatActivity {
final MediaPlayer player1 = new MediaPlayer();
private Button btn_playarti, btn_pausearti, btn_stoparti;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_aarti);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
btn_playarti = (Button) findViewById(R.id.btn_playarti);
btn_pausearti = (Button) findViewById(R.id.btn_pausearti);
btn_stoparti = (Button) findViewById(R.id.btn_stoparti);
try {
player1.setDataSource(STRING_URL);
player1.prepare();
} catch (IOException e) {
e.printStackTrace();
}
btn_playarti.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
player1.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer player) {
player.stop();
}
});
player1.start();
}
});
btn_pausearti.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (player1.isPlaying()) {
player1.pause();
}
}
});
btn_stoparti.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
player1.stop();
}
});
}
#Override
protected void onStop() {
super.onStop();
player1.stop();
}
}

android media player song not closing even i after closing application

///////First Activity///////////
public class MainActivity extends AppCompatActivity
{
Button button;Button button3;MediaPlayer mp2;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
button=(Button)findViewById(R.id.button);
final MediaPlayer mp2 = MediaPlayer.create(this, R.raw.happy);
button.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
Intent inent = new Intent(MainActivity.this,
Main2Activity.class);
startActivity(inent);
if(mp2.isPlaying() == true)
{
mp2.pause();}
else{
mp2.start();}
}
});
}
}
/////////Second Activity
public class Main2Activity extends AppCompatActivity
{
Button button2;MediaPlayer mp2;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
}
}

in your onPause() try this
mp2.stop();

Per the first half of your question: you should get what you want if you call stopMediaPlayer() inside onPause() and onDestroy().
#Override
protected void onPause() {
super.onPause();
stopMediaPlayer();
}
or you can try this too,
#Override
protected void onPause() {
super.onPause();
releaseMediaPlayer();
}

Pause mediaplayer in onStop() and onDestroy() lifecycle methods.
#Override
protected void onStop() {
super.onPause();
mp2.pause();
}
#Override
protected void onDestroy() {
super.onDestroy();
mp2.pause();
}

How do I open a button another activity with another button?

I have made successfully my Imagebutton to open anther activity but the issue is by using the same method on another ImageButton it comes up with an error saying the method is already used in "Main Activity".
public class MainActivity extends ActionBarActivity {
private static ImageButton ImageButton_sbm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
OnClickImageButtonListener();
}
public void OnClickImageButtonListener() {
ImageButton_sbm = (ImageButton)findViewById(R.id.imageButton);
ImageButton_sbm.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.event");
startActivity(intent);
}
}
);
}
private static ImageButton ImageButton2_sbm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
OnClickImageButtonListener();
}
public void OnClickImageButtonListener() {
ImageButton_sbm = (ImageButton)findViewById(R.id.imageButton2);
ImageButton_sbm.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.news");
startActivity(intent);
}
}
);
}
How, if anything, can I apply another method for the "saintbedeslytham.saintbedes.news"

Your problem here is that you cannot create two method with the same definition.
You have two:
protected void onCreate(Bundle savedInstanceState);
and two:
public void OnClickImageButtonListener();
You can't have 2 methods with the same definition for 2 simple reasons.Imagine 2 people with the same name, call for their name.
Who will answer?
Who are you calling?
Edit:
So you can:
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
prepareClicks();
}
private void prepareClicks() {
findViewById(R.id.imageButton).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.event");
startActivity(intent);
}
}
);
findViewById(R.id.imageButton2).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.news");
startActivity(intent);
}
}
);
}
}

public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
prepareClicks();
}
private void prepareClicks() {
findViewById(R.id.imageButton).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.event");
startActivity(intent);
}
}
);
findViewById(R.id.imageButton2).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("saintbedeslytham.saintbedes.news");
startActivity(intent);
}
}
);
}
}
Yup the method worked.
Thanks for the replies,
(Done by Gorcyn)

how do i stop background music when back button is pressed?

i have 2 activities. and 2 different background music plays on both. when i press a button on the first activity it will go to this activity and the changing of music goes smoothly but i want to stop background music when back button is pressed. i tried this but it force closes. is there any other way to do this?
public class Categories extends Activity{
MediaPlayer mp;
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.categories);
mp = MediaPlayer.create(Categories.this, R.raw.looney);
mp.setLooping(true);
mp.start();
Button cartoonButton = (Button) findViewById(R.id.cartoon);
cartoonButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent launchCartoon = new Intent(Categories.this, Cartoon.class);
startActivity(launchCartoon);
}
});
Button superButton = (Button) findViewById(R.id.hero);
superButton.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v) {
Intent launchSuperheroes = new Intent(Categories.this, SuperHeroes.class);
startActivity(launchSuperheroes);
}
});
Button singerButton = (Button) findViewById(R.id.singer);
singerButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent launchSinger = new Intent(Categories.this, Singer.class);
startActivity(launchSinger);
}
});
Button famousButton = (Button) findViewById(R.id.famous);
famousButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent launchFamous = new Intent(Categories.this, Famous.class);
startActivity(launchFamous);
}
});
}
#Override
protected void onResume() {
super.onResume();
mp.start();
}
#Override
protected void onPause() {
super.onPause();
if (mp != null) {
mp.stop();
mp.release();
mp = null;
}
}
}

You can try this code:
#Override
public void onBackPressed() {
if (player.isPlaying()) {
player.stop();
}
player.release();
super.onBackPressed();
}
Hope this help you :)