Apps Productivity App(Help)

EmbededPower · Jul 27, 2017

So to learn android development I've decided to create a simple productivity app. I've decided to start with a calendar. I have it where when you select a date it displays that with a text block. What I am trying to do now is to have it so you can create in event(appointment, upcoming birthday,etc) I've looked every where but people are giving mixed answers and some of them are old. Any ideas on how I can do this and if it can be done with the built in Calendarview?

Deleted User · Jul 27, 2017

Have you had a look at this custom CalendarView component?

https://github.com/tyczj/ExtendedCalendarView

Deleted User · Jul 27, 2017

Some more ideas here

https://stackoverflow.com/questions/22000585/add-event-to-calendarview

You can't add events to the standard CalendarView, which is why people have created custom versions.

EmbededPower · Jul 27, 2017

So which one would you recommend?

Deleted User · Jul 27, 2017

Sorry I have no experience of any of them, just providing some resources for you to look into.

EmbededPower · Jul 27, 2017

So what if I change it up and have the events be shown in a list view and highlighted on the calendarview. Is that something I can do or no

Deleted User · Jul 27, 2017

Using a ListView to display the dates would work.
I'm surprised at the limited functionality of the standard CalendarView. All it appears to do is allow you to select dates.

EmbededPower · Jul 27, 2017

Yeah its weird. Not sure why google wont allow you to add events to it. I figured the ListView way would probably be better. Can I make it so when you click on a date in the CalendarView it will take you to that event in the listview?

Deleted User · Jul 27, 2017

Yes that's possible, you can add a date listener callback to the CalendarView which will tell you when the selected date changed.

EmbededPower · Jul 27, 2017

Ok so i've been looking around and found https://stackoverflow.com/questions/22144891/how-to-add-listview-items-on-button-click-using-adapter On the Activity part I am stuck at:

Code:

public void onItemClick(AdapterView<?> a, View v, int position,
                    long id) {

Here is my code:

Code:

package com.example.johnathan.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    EditText editText;
    EditText editText2;
    Button addButton;
    ListView listView;
    ArrayList<String> listItems;
    ArrayAdapter<String> adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editText = (EditText) findViewById(R.id.editText);
        editText = (EditText) findViewById(R.id.editText2);
        addButton = (Button) findViewById(R.id.addItem);
        listView = (ListView) findViewById(R.id.listView);
        listItems = new ArrayList<String>();
        listItems.add("First Item - added on Activity Create");
        adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, listItems);
        listView.setAdapter(adapter);
        addButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listItems.add(editText.getText().toString());
                listItems.add(editText2.getText().toString());
                adapter.notifyDataSetChanged();
            }
        });
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                long id) {
                    Toast.makeText(MainActivity.this, "Clicked", Toast.LENGTH_LONG)
                            .show();
                }
                }
            }
        });
}

Im not sure why it looks different when I am using the "OnItemClickListener"

Any help would be appreciated. Thanks

Deleted User · Jul 28, 2017

What do you mean by "looks different"? The only difference is the parameter names used in the method definition. It's functionally the same code.

EmbededPower · Jul 28, 2017

It's not liking the "long id) {"

Deleted User · Jul 28, 2017

What's the actual error?

EmbededPower · Jul 28, 2017

I've uploaded a screenshot for you.

Deleted User · Jul 28, 2017

You have too many close brackets in this block

Code:

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                long id) {
                    Toast.makeText(MainActivity.this, "Clicked", Toast.LENGTH_LONG)
                            .show();
                }
                }
            }
        });

There are 3 "{" but 4 "}" Remove the one at line 9 above.

EmbededPower · Jul 28, 2017

So i removed that one and it's the same thing :/

Deleted User · Jul 28, 2017

Post up your current code. I'll paste it into Android Studio and tell you what your compile problem is.

EmbededPower · Jul 28, 2017

MainActivity.java

Code:

package com.example.johnathan.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    EditText editText;
    EditText editText2;
    Button addButton;
    ListView listView;
    ArrayList<String> listItems;
    ArrayAdapter<String> adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editText = (EditText) findViewById(R.id.editText);
        editText = (EditText) findViewById(R.id.editText2);
        addButton = (Button) findViewById(R.id.addItem);
        listView = (ListView) findViewById(R.id.listView);
        listItems = new ArrayList<String>();
        listItems.add("First Item - added on Activity Create");
        adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, listItems);
        listView.setAdapter(adapter);
        addButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listItems.add(editText.getText().toString());
                listItems.add(editText2.getText().toString());
                adapter.notifyDataSetChanged();
            }
        });
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                long id) {
                    Toast.makeText(MainActivity.this, "Clicked", Toast.LENGTH_LONG)
                            .show();
                }

            }
        });

    }

activity_main.xml

Code:

<?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.example.johnathan.myapplication.MainActivity">

    <EditText
        android:id="@+id/editText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="Name"
        tools:layout_editor_absoluteY="0dp"
        tools:layout_editor_absoluteX="0dp" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="Name"
        tools:layout_editor_absoluteY="43dp"
        tools:layout_editor_absoluteX="0dp" />

    <Button
        android:id="@+id/addItem"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button"
        tools:layout_editor_absoluteX="215dp"
        tools:layout_editor_absoluteY="106dp" />

    <ListView
        android:id="@+id/listView"
        android:layout_width="294dp"
        android:layout_height="209dp"
        tools:layout_editor_absoluteX="9dp"
        tools:layout_editor_absoluteY="187dp" />

</android.support.constraint.ConstraintLayout>

_main.xml

Deleted User · Jul 28, 2017

I corrected the syntax errors. Study the differences between your original code, and understand why it didn't work. Parentheses must match up.

Code:

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    EditText editText;
    EditText editText2;
    Button addButton;
    ListView listView;
    ArrayList<String> listItems;
    ArrayAdapter<String> adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editText = (EditText) findViewById(R.id.editText);
        editText = (EditText) findViewById(R.id.editText2);
        addButton = (Button) findViewById(R.id.addItem);
        listView = (ListView) findViewById(R.id.listView);
        listItems = new ArrayList<String>();
        listItems.add("First Item - added on Activity Create");
        adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, listItems);
        listView.setAdapter(adapter);
        addButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listItems.add(editText.getText().toString());
                listItems.add(editText2.getText().toString());
                adapter.notifyDataSetChanged();
            }
        });
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Toast.makeText(MainActivity.this, "Clicked", Toast.LENGTH_LONG)
                        .show();
            }

        });

    }
}

EmbededPower · Jul 28, 2017

So i basically didn't need the long id part at all.

EmbededPower · Jul 28, 2017

So it now runs but when I try to add something, i cant even select the second text field and when I hit the add button it crashes

Deleted User · Jul 29, 2017

Have you read this?

https://androidforums.com/threads/please-read-me-before-posting.987318/

Need to see the stack trace if the app crashed.

Deleted User · Jul 29, 2017

Question: What's wrong with this line?

editText = (EditText) findViewById(R.id.editText2);

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