package com.example.admin.hw4; import android.app.Activity import android.suppor
ID: 3731021 • Letter: P
Question
package com.example.admin.hw4;
import android.app.Activity
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.Toast;
import android.widget.ProgressBar;
import android.view.Menu;
import android.view.MenuInflater
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_hw4);
findViewById(R.id.hi).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(MainActivity.this,"Calories Burned",Toast.LENGTH_LONG).show();
}
});
findViewById(R.id.by ).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(MainActivity.this,"Heart Rate",Toast.LENGTH_LONG).show();
}
});
final CheckBox c1=findViewById(R.id.checkbox);
final CheckBox c2=findViewById(R.id.checkbox);
c1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if(c1.isChecked()){
c1.setText("Weight");
}else
{
c1.setText("Height");
}
}
});
c2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if(c2.isChecked()){
c2.setText("Height");
}else
{
c2.setText("Weight");
}
}
});
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_hw4);
final ProgressBar simpleProgressBar = findViewById(R.id.simpleProgressBar);
simpleProgressBar.setOnClickListener(new View.OnClickListener);
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_hw4);
editTxt = (EditText) findViewById(R.id.editText);
btn = (Button) findViewById(R.id.button);
list = (ListView) findViewById(R.id.listView);
arrayList = new ArrayList();
adapter=new ArrayAdapter(getApplicationContext(),android.R.layout.simple_spinner_item,arrayList);
list.setAdapter(adapter);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
arrayList.add(editTxt.getText().toString());
adapter.notifyDataSetChanged();
}
});
}
public void onClick(View view) {
DatePicker datePicker = (DatePicker) dialogView.findViewById=(R.id.date_picker);
TimePicker timePicker = (TimePicker) dialogView.findViewById(R.id.time_picker);
Calendar calendar = new GregorianCalendar(datePicker.getYear(),
datePicker.getMonth(),
datePicker.getDayOfMonth(),
timePicker.getCurrentHour(),
timePicker.getCurrentMinute());
time = calendar.getTimeInMillis();
alertDialog.dismiss();
}});
alertDialog.setView(dialogView);
alertDialog.show();
public class HW4 extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_hw4);
}
}
}
THERE ARE ERRORS IN THE JAVA CODE. PLEASE CORRECT ALL ERRORS IN THE CODE ABOVE.
Explanation / Answer
/*
please find the updated code below, which is working fine without the error's.
please save the java class name as HW4.java and run the program.
*/
import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.Toast;
import android.widget.ProgressBar;
public class HW4 extends AppCompatActivity
{
@Override protected void onCreate (Bundle savedInstanceState)
{
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_main);
findViewById (R.id.hi).setOnClickListener (new View.OnClickListener ()
{
@Override
public void onClick (View view)
{
Toast.makeText (HW4.
this,
"Calories Burned",
Toast.
LENGTH_LONG).
show ();}
});
findViewById (R.id.by).setOnClickListener (new View.OnClickListener ()
{
@Override
public void onClick (View view)
{
Toast.makeText (HW4.
this,
"Heart Rate",
Toast.
LENGTH_LONG).
show ();}
});
final CheckBox c1 = findViewById (R.id.checkbox);
final CheckBox c2 = findViewById (R.id.checkbox);
c1.setOnCheckedChangeListener (new CompoundButton.
OnCheckedChangeListener ()
{
@Override
public void
onCheckedChanged (CompoundButton
compoundButton,
boolean b)
{
if (c1.isChecked ())
{
c1.setText ("Weight");}
else
{
c1.setText ("Height");}
}
}
);
c2.setOnCheckedChangeListener (new CompoundButton.
OnCheckedChangeListener ()
{
@Override
public void
onCheckedChanged (CompoundButton
compoundButton,
boolean b)
{
if (c2.isChecked ())
{
c2.setText ("Height");}
else
{
c2.setText ("Weight");}
}
}
);
}
@Override protected void onCreate (Bundle savedInstanceState)
{
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_main);
final ProgressBar simpleProgressBar =
(ProgressBar) findViewById (R.id.simpleProgressBar);
simpleProgressBar.setOnClickListener ();
}
@Override protected void onCreate (Bundle savedInstanceState)
{
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_main);
editTxt = (EditText) findViewById (R.id.editText);
btn = (Button) findViewById (R.id.button);
list = (ListView) findViewById (R.id.listView);
arrayList = new ArrayList ("Road", "Track", "Gravel", "Other");
adapter =
new ArrayAdapter (getApplicationContext (),
android.R.layout.simple_spinner_item, arrayList);
list.setAdapter (adapter);
btn.setOnClickListener (new View.OnClickListener ()
{
@Override public void onClick (View view)
{
arrayList.add (editTxt.getText ().toString ());
adapter.notifyDataSetChanged ();}
});
}
public void onClick (View view)
{
DatePicker datePicker =
(DatePicker) dialogView.findViewById (R.id.date_picker);
TimePicker timePicker =
(TimePicker) dialogView.findViewById (R.id.time_picker);
Calendar calendar = new GregorianCalendar (datePicker.getYear (),
datePicker.getMonth (),
datePicker.getDayOfMonth (),
timePicker.getCurrentHour (),
timePicker.
getCurrentMinute ());
time = calendar.getTimeInMillis ();
alertDialog.dismiss ();
alertDialog.setView (dialogView);
alertDialog.show ();
}
}
/* thank you */
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