I can`t understand why my onClick event of textview does not happening?
My code:
public class CallReceiver extends BroadcastReceiver{
Context my_ctx;
private static CountDownTimer countDownTimer;
private static Toast my_toast;
public void onReceive(Context context, Intent intent)
{
my_ctx = context;
showing_toast("Message");
}
public void showing_toast(String Message)
{
my_toast = Toast.makeText(my_ctx, Message, Toast.LENGTH_SHORT);
TextView textView = new TextView(my_ctx);
textView.setText(Message);
textView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
countDownTimer.cancel();
}
});
my_toast.setView(textView);
countDownTimer = new CountDownTimer((30)*1000, 1000) {
#Override
public void onTick(long millisUntilFinished) {
my_toast.show();
}
#Override
public void onFinish() {
my_toast.cancel();
}
}.start();
}
So, countDownTimer go on and toast message doesn`t disappear although i click on textview
Related
I'm new in java and I have tried to make a food app in android studio. I have a bar in app and when I click on cart my app is crashing.
Here is my MainActivity
public class MainActivity extends AppCompatActivity {
private RecyclerView.Adapter adapter, adapter2;
private RecyclerView recyclerViewCategotyList, recyclerViewPopularList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerViewCategoty();
recyclerViewPopular();
bottomNavigation();
}
private void bottomNavigation() {
LinearLayout homeBtn=findViewById(R.id.homeBtn);
LinearLayout cartBtn=findViewById(R.id.cartBtn);
homeBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,MainActivity.class));
}
});
cartBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,CartActivity.class));
}
});
}
And I have this error: at com.example.food.Activity.MainActivity$2.onClick(MainActivity.java:48)
This is CartActivity
public class CartActivity extends AppCompatActivity {
private RecyclerView.Adapter adapter;
private RecyclerView recyclerViewList;
private ManagementCart managementCart;
private TextView totalFeeTxt, taxTxt, deliveryTxt, totalTxt, emptyTxt;
private double tax;
private ScrollView scrollView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cart);
managementCart = new ManagementCart(this);
initView();
initList();
bottomNavigation();
calculateCard();
}
private void bottomNavigation() {
LinearLayout homeBtn = findViewById(R.id.homeBtn);
LinearLayout cartBtn = findViewById(R.id.cartBtn);
homeBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(CartActivity.this, MainActivity.class));
}
});
cartBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(CartActivity.this, MainActivity.class));
}
});
}
I don't know what's wrong and why my setOnClickListener doesn't work.
Thank you.
I think your button R.id.homeBtn is not LinearLayout, can you show your xml file?
If your buttons are Button classes, try this
private void bottomNavigation() {
Button homeBtn = findViewById(R.id.homeBtn);
Button cartBtn = findViewById(R.id.cartBtn);
homeBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(CartActivity.this, MainActivity.class));
}
});
cartBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startActivity(new Intent(CartActivity.this, MainActivity.class));
}
});
}
I have made an Android Studio app that plays an mp3 file when you click a button. Suddenly it started crashing. I have checked the code myself and I cannot spot any errors. I tried reinstalling the emulator too and using a physical android device to connect, but still the same issue happens. Here is the java file:
public class MainActivity extends AppCompatActivity {
private Button yes;
private Button no;
private ImageButton iwant;
private ImageButton food;
private ImageButton restroom;
private ImageButton water;
private ImageButton playground;
private ImageButton rice;
private ImageButton school;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
yes = findViewById(R.id.yes);
no = findViewById(R.id.no);
iwant = findViewById(R.id.iwant);
food = findViewById(R.id.food);
restroom = findViewById(R.id.restroom);
water = findViewById(R.id.water);
playground = findViewById(R.id.playground);
rice = findViewById(R.id.rice);
school = findViewById(R.id.school);
final MediaPlayer mediaPlayer = MediaPlayer.create(this,R.raw.yes);
final MediaPlayer mediaPlayer2 = MediaPlayer.create(this,R.raw.no);
final MediaPlayer mediaPlayer3 = MediaPlayer.create(this,R.raw.iwant);
final MediaPlayer mediaPlayer4 = MediaPlayer.create(this,R.raw.food);
final MediaPlayer mediaPlayer5 = MediaPlayer.create(this,R.raw.restroom);
final MediaPlayer mediaPlayer6 = MediaPlayer.create(this,R.raw.water);
final MediaPlayer mediaPlayer7 = MediaPlayer.create(this,R.raw.playground);
final MediaPlayer mediaPlayer8 = MediaPlayer.create(this,R.raw.rice);
final MediaPlayer mediaPlayer9 = MediaPlayer.create(this,R.raw.school);
yes.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer.start();
}
});
no.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer2.start();
}
});
iwant.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer3.start();
}
});
food.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer4.start();
}
});
restroom.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer5.start();
}
});
water.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer6.start();
}
});
playground.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer7.start();
}
});
rice.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer8.start();
}
});
school.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer9.start();
}
});
}
}
I was trying to create an android app that should get time in minutes from a seek bar then it should begin to play a sound file until the countdown timer ends.
Things are mostly fine with the countdown timer BUT my question is how should I call some methods of the countdown timer instance when a button is pressed.
In the code below, I want to call onFinish() whenever the stop button pressed.
Here is my code:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SeekBar sb = (SeekBar) findViewById(R.id.seekBar);
Button bt_stop = (Button) findViewById(R.id.btn1);
final TextView tv = (TextView)findViewById(R.id.textView);
sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
int millisec_time = (i*60)/1000;
new CountDownTimer(millisec_time, 1000) {
public void onTick(long millisUntilFinished) {
tv.setText("seconds remaining: " + millisUntilFinished / 1000);
}
public void onFinish() {
tv.setText("done!");
}
}.start();
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
// Toast.makeText(getApplicationContext(),"GOT",Toast.LENGTH_LONG).show();
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
// Toast.makeText(getApplicationContext(),"OFF",Toast.LENGTH_LONG).show();
}
});
bt_stop.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
}
});
}
}
First, I'd recommend you only start your CountdownTimer in onStopTrackingTouch - reason being that currently you're creating a brand new timer every time the progress changes on your seekbar (which could be happening a lot).
Secondly, you'll need to retain a reference to your timer in order to cancel it. So:
public class MainActivity extends AppCompatActivity {
private CountdownTimer timer = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final SeekBar sb = (SeekBar) findViewById(R.id.seekBar);
sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
restartTimer(seekBar);
}
}
final Button bt_stop = (Button) findViewById(R.id.btn1);
bt_stop.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(timer != null) {
timer.cancel();
}
}
});
}
private void restartTimer(SeekBar sb) {
if(timer!=null) {
timer.cancel();
}
final long millis = TimeUnit.SECONDS.toMillis(sb.getProgress());
final long interval = TimeUnit.SECONDS.toMillis(1);
timer = new CountdownTimer(millis, interval) {
#Override
public void onTick(long millisUntilFinished) {
tv.setText(String.format("Seconds Remaining: %d", TimeUnit.MILLIS.toSeconds(millisUntilFinished));
}
#Override
public void onFinish() {
tv.setText("done!");
}
}
timer.start();
}
}
I have listed the code below, What i am trying to achieve is the int i to be updated from a dialog box (dialog2). I then want to check in the main activity if it has changed and if it has changed then call a method. How would i do this?
Main Activity
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int i = 0;
Dialog1 dialog1 = new Dialog1(this, i);
dialog1.show();
}
//Want to call this method whenever I is modified
private void iModified(){
}
}
Dialog 1 Class (This dialog just passes it to dialog2)
public class Dialog1 extends Dialog{
int integerI;
Button button;
public Dialog1(final Activity activity, final int i){
super(activity);
setContentView(R.layout.dialog1);
integerI = i;
button = findViewById(R.id.dialog1Button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Dialog2 dialog2 = new Dialog2(activity ,integerI);
dialog2.show();
closeDialog();
}
});
}
private void closeDialog(){
this.dismiss();
}
}
Dialog 2: This is where the integer is going to be changed and then i want it to be sent to the main activity and checked if it has changed and if so then replace the old integer with the new one.
public class Dialog2 extends Dialog {
int newI;
Button button;
public Dialog2(Activity activity, int i) {
super(activity);
setContentView(R.layout.dialog2);
newI= i + 12345;
button = findViewById(R.id.dialog2Button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
close();
}
});
}
private void close(){
this.dismiss();
}
}
You can use interface.
your activity:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int i = 0;
Dialog1 dialog1 = new Dialog1(this, i, new ModifiedListener() {
#Override
public void notify(int i) {
iModified();
}
});
dialog1.show();
}
//Want to call this method whenever I is modified
private void iModified(){
}
}
your dialog1:
public class Dialog1 extends Dialog {
int integerI;
Button button;
public Dialog1(final Activity activity, final int i, final ModifiedListener listener) {
super(activity);
setContentView(R.layout.dialog1);
integerI = i;
button = findViewById(R.id.dialog1Button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Dialog2 dialog2 = new Dialog2(activity, integerI);
dialog2.show();
closeDialog();
}
});
}
private void closeDialog() {
this.dismiss();
}
}
your dialog 2:
public class Dialog2 extends Dialog {
int newI;
Button button;
public Dialog2(Activity activity, int i, final ModifiedListener listener) {
super(activity);
setContentView(R.layout.dialog2);
newI = i + 12345;
//when you modify int you have to call
listener.notify(newI);
button = findViewById(R.id.dialog2Button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
close();
}
});
}
private void close() {
this.dismiss();
}
}
define interface similar to class:
public interface ModifiedListener {
public void notify(int i);
}
I want to develop an app to toggle the device's audio status. If the audio status is silent then my button's text should be "silent", if it's normal the text should be "normal"
Here is my only class:
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button btn1= (Button) findViewById(R.id.btn1);
final AudioManager audio = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
if (audio.getRingerMode()==AudioManager.RINGER_MODE_NORMAL)
{
btn1.setText("Normal");
}
else if (audio.getRingerMode()==AudioManager.RINGER_MODE_SILENT)
{
btn1.setText("Silent");
}
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (audio.getRingerMode()==AudioManager.RINGER_MODE_NORMAL)
{
audio.setRingerMode(AudioManager.RINGER_MODE_SILENT);
btn1.setText("Silent");
}
else if (audio.getRingerMode()==AudioManager.RINGER_MODE_SILENT)
{
audio.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
btn1.setText("Normal");
}
}
});
}
});
How can I always check this condition in Android ?
If you need to get the mode of current ringer even if it was changed outside from you application context then you should register a BroadcastReceiver for AudioManager.RINGER_MODE_CHANGED_ACTION.
This receiver will be called everytime someone changes the ringer mode.
Do this inside onCreate.
BroadcastReceiver receiver=new BroadcastReceiver(){
#Override
public void onReceive(Context context, Intent intent) {
if (audio.getRingerMode()==AudioManager.RINGER_MODE_NORMAL)
{
btn1.setText("Silent");
}
else if (audio.getRingerMode()==AudioManager.RINGER_MODE_SILENT)
{
btn1.setText("Normal");
}
}
};
IntentFilter filter=new IntentFilter(AudioManager.RINGER_MODE_CHANGED_ACTION);
registerReceiver(receiver,filter);
Just do this
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (audio.getRingerMode()==AudioManager.RINGER_MODE_NORMAL)
{
audio.setRingerMode(AudioManager.RINGER_MODE_SILENT);
btn1.setText("Silent");
}
else if (audio.getRingerMode()==AudioManager.RINGER_MODE_SILENT)
{
audio.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
btn1.setText("Normal");
}
}
});
what your are doing is
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (audio.getRingerMode()==AudioManager.RINGER_MODE_NORMAL)
{
audio.setRingerMode(AudioManager.RINGER_MODE_SILENT);
btn1.setText("Silent");
}
else if (audio.getRingerMode()==AudioManager.RINGER_MODE_SILENT)
{
audio.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
btn1.setText("Normal");
}
}
});
}
});