Material Date Picker, Date Picker and Time Picker

 1.  Material Date Picker

//local assigned variables
etd_from = (TextView) findViewById(R.id.etd_from);
etd_to = (TextView) findViewById(R.id.etd_to);

//date
etd_from.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        MaterialDatePicker dPick_from = MaterialDatePicker.Builder.datePicker()
                .setTitleText("RK Select Date").setSelection(MaterialDatePicker.todayInUtcMilliseconds())
                .build();
        dPick_from.show(getSupportFragmentManager(), "Material_Date_Picker");
        dPick_from.addOnPositiveButtonClickListener(new MaterialPickerOnPositiveButtonClickListener() {
            @Override
            public void onPositiveButtonClick(Object selection) {
                etd_from.setText(dPick_from.getHeaderText().replace(" ", "-"));
            }
        });
    }
});

2.  Date Picker Dialog 

        etd_to.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Calendar calendar = Calendar.getInstance();
                int yy = calendar.get(Calendar.YEAR);
                int mm = calendar.get(Calendar.MONTH);
                int dd = calendar.get(Calendar.DATE);
                DatePickerDialog datePickerDialog = new DatePickerDialog(receipt_list.this, new DatePickerDialog.OnDateSetListener() {
                    @Override
                    public void onDateSet(DatePicker datePicker, int year, int month, int date) {
                        Calendar calendar1 = Calendar.getInstance();
                        calendar1.set(Calendar.YEAR, year);
                        calendar1.set(Calendar.MONTH, month);
                        calendar1.set(Calendar.DATE, date);
                        CharSequence charSequence = DateFormat.format("dd-MMM-yyyy", calendar1);
                        etd_to.setText(charSequence);
                    }
                }, yy, mm, dd);
                datePickerDialog.show();
            }
        });

3. Time Picker Dialog

etd_to.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {



        Calendar calendar = Calendar.getInstance();
        int Hour = calendar.get(Calendar.HOUR);
        int Minute = calendar.get(Calendar.MINUTE);
        boolean is24HourFormateRK = DateFormat.is24HourFormat(receipt_list.this);

        TimePickerDialog timePickerDialog = new TimePickerDialog(receipt_list.this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker timePicker, int hour_, int min_) {
                Calendar calendar1 = Calendar.getInstance();
                calendar1.set(Calendar.HOUR, hour_);
                calendar1.set(Calendar.MINUTE, min_);
                CharSequence charSequence = DateFormat.format("hh:mm a", calendar1);
                etd_to.setText(charSequence);
            }
        }, Hour, Minute, is24HourFormateRK);
        timePickerDialog.show();

    }
});

4. XML

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="8dp"
    android:orientation="horizontal">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_weight="1"
        android:background="@color/dtp_background"
        android:layout_margin="2dp">

        <TextView
            android:id="@+id/etd_from"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:hint=" From Date"
            android:inputType="date"
            android:minHeight="48dp"
            android:padding="8dp"
            android:textSize="20sp" />

        <ImageButton
            android:id="@+id/imgBtn_from"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:padding="0dp"
            app:srcCompat="@drawable/ic_baseline_close_24" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_weight="1"
        android:background="@color/dtp_background"
        android:layout_margin="2dp">

        <TextView
            android:id="@+id/etd_to"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:hint="To Date"
            android:inputType="date"
            android:minHeight="48dp"
            android:padding="8dp"
            android:textSize="20sp" />

        <ImageButton
            android:id="@+id/imgBtn_to"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:padding="0dp"
            app:srcCompat="@drawable/ic_baseline_close_24" />
    </LinearLayout>

</LinearLayout>

5.

6.

Swipe Refresh Layout Event

 1. XML

<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/SwipeRefreshLayout1">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rcyVw_receipt"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

2.  In Activity

SwipeRefreshLayout swipeRefreshLayout;

//button
Button btn_rec_search;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_receipt_list);


    //swipe refresh layout
    swipeRefreshLayout = findViewById(R.id.SwipeRefreshLayout1);

    swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            f_show_list1();
            swipeRefreshLayout.setRefreshing(false);
        }
    });
}
    

Populate Recycler View with Api

1. Recycler View Adapter

public class ReceiptListAdapter extends RecyclerView.Adapter<ReceiptListAdapter.ReceiptListViewHolder> {

    // List<UserModel> list = new ArrayList<UserModel>();
    List<receipt> data;
    iItemClickListnerRK iItemClickListnerRk;

    public ReceiptListAdapter(List<receipt> data, iItemClickListnerRK iItemClickListnerRk) {
        this.data = data;
        this.iItemClickListnerRk = iItemClickListnerRk;
    }

    @Override
    public ReceiptListViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View view = inflater.inflate(R.layout.receipt_item_list, parent, false);
        return new ReceiptListViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ReceiptListViewHolder holder, int position) {
        String title = data.get(position).toString();
        holder.txtTitle.setText(title);

        holder.itemView.setOnClickListener(view -> {
            iItemClickListnerRk.onClickItemListnerRK(title, position);//this will get current index of item in recyclerView
        });
    }

    @Override
    public int getItemCount() {
        return data.size();
    }

    public interface iItemClickListnerRK {
        void onClickItemListnerRK(String itemNameRK, int idx);
    }


    public class ReceiptListViewHolder extends RecyclerView.ViewHolder {
        ImageView imgIcon;
        TextView txtTitle;

        public ReceiptListViewHolder(View itemView) {
            super(itemView);
            imgIcon = itemView.findViewById(R.id.imgIcon);
            txtTitle = itemView.findViewById(R.id.txtTitle);
        }
    }
}

2. Call Api

public class VolleyActions {

    Context context;
    ProgressBar progressBar;


    public VolleyActions(Context context, ProgressBar progressBar) {
        this.context = context;
        this.progressBar = progressBar;
    }   


    //get meter Json Object
    public interface IVolleyGet {
        void onError(String message);

        void onResponse(JSONObject jsonObject);
    }

    public void volleyGet(String appedUrl, String filters, IVolleyGet iVolleyGet) {


        Api_Urls api_urls = new Api_Urls();

        String getUrl = api_urls.API_URL + appedUrl + filters;

        RequestQueue requestQueue = Volley.newRequestQueue(context);

        //api key authentication
        session_rk sessionRk = new session_rk(context);
        String apiKey = sessionRk.f_api_key();
        //api key authentication


        //Start progress bar
        progressBar.setVisibility(View.VISIBLE);
        //Execute post request
        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, getUrl, null, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
//                System.out.println(response);
                progressBar.setVisibility(View.INVISIBLE);

                //JSONObject rdata;
                try {
                    Integer st = Integer.parseInt(response.getString("Item1").toString());
                    if (st.equals(200)) {
                        //rdata = response.getJSONObject("m_Item3");
                        iVolleyGet.onResponse(response);
                    } else {
                        Toast.makeText(context, "" + response.getString("Item2"), Toast.LENGTH_SHORT).show();
                    }
                } catch (JSONException e) {
                    Toast.makeText(context, "" + e.getMessage(), Toast.LENGTH_SHORT).show();
                    e.printStackTrace();
                }

            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(context, "" + error.getMessage(), Toast.LENGTH_SHORT).show();
                error.printStackTrace();
                progressBar.setVisibility(View.INVISIBLE);
            }
        }) {
            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                Map<String, String> params = new HashMap<String, String>();
                params.put("Content-Type", "application/json");
                params.put("Authorization", "basic " + apiKey);

                return params;
            }
        };

        requestQueue.add(jsonObjectRequest);

    }
    //get meter Json Object e


}

3. Populate Recycler View with Model List

    public void f_show_list1() {

        List<receipt> lng = new ArrayList<receipt>();
        String filters = "?";
//        if (!etd_from.getText().toString().isEmpty() && !etd_to.getText().toString().isEmpty()) {
//            filters += "Date_From=" + etd_from.getText().toString() + "&";
//            filters += "Date_To=" + etd_to.getText().toString() + "&";
//        }
        userAcc user = (userAcc) spnr_pcode.getSelectedItem();
        if (!user.getLCode().isEmpty()) {
            filters += "Pcode=" + user.getLCode() + "&";
        }

        VolleyActions a = new VolleyActions(this, progressBar);
        a.volleyGet("receipt/data", filters, new VolleyActions.IVolleyGet() {
            @Override
            public void onError(String message) {
                Toast.makeText(receipt_list.this, "Invalid transaction.", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onResponse(JSONObject jsonObject) {
                try {
                    JSONArray jsonArray = jsonObject.getJSONArray("Item3");
                    for (int i = 0; i < jsonArray.length(); i++) {
                        JSONObject jObj = jsonArray.getJSONObject(i);
                        receipt obj = new receipt();
                        obj.setRec_No(jObj.getString("Rec_No"));
                        obj.setPName(jObj.getString("PName"));
                        obj.setRec_Date(jObj.getString("Rec_Date"));
                        obj.setAmt(Double.parseDouble(jObj.getString("Amt")));
                        lng.add(obj);
                    }

                    //recycler view
                    RecyclerView recyclerView1 = findViewById(R.id.rcyVw_receipt);
                    recyclerView1.setLayoutManager(new LinearLayoutManager(receipt_list.this));
                    ReceiptListAdapter recyclerAdapter1 = new ReceiptListAdapter(lng, new ReceiptListAdapter.iItemClickListnerRK() {
                        @Override
                        public void onClickItemListnerRK(String itemNameRK, int idx) {
                            Toast.makeText(receipt_list.this, "Clicked => P:" + idx + ", item:" + itemNameRK, Toast.LENGTH_SHORT).show();
                        }
                    });
                    recyclerView1.setAdapter(recyclerAdapter1);
                    //recycler view e


                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        });

        Toast.makeText(receipt_list.this, "Fetching...", Toast.LENGTH_SHORT).show();
    }

 

Other

 1. Menu Event Manage in xml

      android.menuCategory="secondary"

Drop Down List or Spinner With Model

1. Model

public class User {
    private int id;
    private String Name;
    private String Email;
    private int Age;

    public User(int id, String name, String email, int age) {
        this.id = id;
        Name = name;
        Email = email;
        Age = age;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return Name;
    }

    public void setName(String name) {
        Name = name;
    }

    public String getEmail() {
        return Email;
    }

    public void setEmail(String email) {
        Email = email;
    }

    public int getAge() {
        return Age;
    }

    public void setAge(int age) {
        Age = age;
    }

    @Override
    public String toString() {
        return  id + " : " + Name;

    }
}

2. Main Activity

public class MainActivity extends AppCompatActivity {
    //define variable
    private Spinner spinner;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //assign variagle
        spinner = findViewById(R.id.spinner1);
        button = findViewById(R.id.button1);

        //populate list
        List<User> userList = new ArrayList<>();
        userList.add(new User(1, "Ram", "ram@gamil.com", 40));
        userList.add(new User(2, "Shyam", "shyam@gamil.com", 45));
        userList.add(new User(3, "Ram Kumar", "ramkumar@gamil.com", 32));
        userList.add(new User(4, "Manoj Sing", "manoj@gamil.com", 56));

        //define and assing array adapter
        ArrayAdapter<User> adapter = new ArrayAdapter<User>(this,
                android.R.layout.simple_spinner_item, userList);

        //Assign adapter drop down list
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        //assign into spinner
        spinner.setAdapter(adapter);

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                User user = (User) adapterView.getSelectedItem();
                DisplayUserData(user);
            }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {

            }
        });

    }

    public void on_btn_submit(View view) {
        User user = (User) spinner.getSelectedItem();
        DisplayUserData(user);
    }

    private void DisplayUserData(User user) {
        int id = user.getId();
        String name = user.getName();
        String email = user.getEmail();
        int age = user.getAge();

        String sql = "";
        sql += "\nID : " + id;
        sql += "\nName : " + name;
        sql += "\nEmail : " + email;
        sql += "\nAge : " + age;

        Toast.makeText(MainActivity.this, ""+sql, Toast.LENGTH_SHORT).show();
    }

}

Drop Down List or Spinner

public class MainActivity extends AppCompatActivity {

    Button button;
    Spinner spinner;
    EditText et;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        button = findViewById(R.id.btn_submit);
        et = findViewById(R.id.et_name1);
        spinner = findViewById(R.id.spinner1);

        // Spinner click listener
        //spinner.setOnItemSelectedListener(this);

        // Spinner Drop down elements
        List<String> categories = new ArrayList<String>();
        categories.add("Item 1");
        categories.add("Item 2");
        categories.add("Item 3");
        categories.add("Item 4");
        categories.add("Item 5");
        categories.add("Item 6");

        // Creating adapter for spinner
        ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, categories);

        // Drop down layout style - list view with radio button
        dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        // attaching data adapter to spinner
        spinner.setAdapter(dataAdapter);

        //Drop Down Selected Event
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                String sel_name = adapterView.getSelectedItem().toString();
                Toast.makeText(MainActivity.this, "Selected item : "+sel_name, Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {

            }
        });

        //Button Submit Event
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String ddl_str =    String.valueOf(spinner.getSelectedItem());
                Toast.makeText(MainActivity.this, "Submitted : "+ddl_str, Toast.LENGTH_SHORT).show();
            }
        });

    }
}

Recycler View item Click event

1. Define in adapter with inter face

public class programmingAdapter extends RecyclerView.Adapter<programmingAdapter.programmingViewHolder> {

    String[] data;
    iItemClickListnerRK iItemClickListnerRk;

    public programmingAdapter(String[] data, iItemClickListnerRK iItemClickListnerRk) {
        this.data = data;
        this.iItemClickListnerRk = iItemClickListnerRk;
    }

    @Override
    public programmingViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View view = inflater.inflate(R.layout.list_item_layout, parent, false);
        return new programmingViewHolder(view);
    }

    @Override
    public void onBindViewHolder(programmingViewHolder holder, int position) {
        String title = data[position];
        holder.txtTitle.setText(title);

        holder.itemView.setOnClickListener(view -> {
            iItemClickListnerRk.onClickItemListnerRK(title, position);//this will get current index of item in recyclerView
        });
    }

    @Override
    public int getItemCount() {
        return data.length;
    }

    public interface iItemClickListnerRK {
        void onClickItemListnerRK(String itemNameRK, int idx);
    }


    public class programmingViewHolder extends RecyclerView.ViewHolder {
        ImageView imgIcon;
        TextView txtTitle;

        public programmingViewHolder(View itemView) {
            super(itemView);
            imgIcon = itemView.findViewById(R.id.imgIcon);
            txtTitle = itemView.findViewById(R.id.txtTitle);
        }
    }


}

2. Apply in MainActivity

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RecyclerView recyclerView=findViewById(R.id.programmingListRK);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        String[] lng={"Java","C Sharp","C plus plus","Dot net","PHP","Python","C Sharp","C plus plus","Dot net","PHP","Python","C Sharp","C plus plus","Dot net","PHP","Python"};

        programmingAdapter adapter =  new programmingAdapter(lng, new programmingAdapter.iItemClickListnerRK() {
            @Override
            public void onClickItemListnerRK(String itemNameRK, int idx) {
                Toast.makeText(MainActivity.this, "Clicked => P:"+idx+", item:"+itemNameRK, Toast.LENGTH_SHORT).show();
            }
        });

        recyclerView.setAdapter(adapter);

    }
}

3. xml main

<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView
    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:id="@+id/programmingListRK"
    tools:context=".MainActivity">


</androidx.recyclerview.widget.RecyclerView>

4. xml list view for recycler

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="8dp">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imgIcon"
        android:src="@mipmap/ic_launcher"
        />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/app_name"
        android:id="@+id/txtTitle"
        android:textSize="24sp"
        android:layout_gravity="center"
        android:layout_weight="1"
        android:layout_marginLeft="16dp"/>

</LinearLayout>

Recycler View

Fill Recycler View

1. Create Adapter

public class programmingAdapter extends RecyclerView.Adapter<programmingAdapter.programmingViewHolder> {

    String[] data;

    public programmingAdapter(String[] data) {

        this.data = data;

    }

    @Override

    public programmingViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        LayoutInflater inflater = LayoutInflater.from(parent.getContext());

        View view = inflater.inflate(R.layout.list_item_layout,parent,false);

        return new programmingViewHolder(view);

    }

    @Override

    public void onBindViewHolder(programmingViewHolder holder, int position) {

        String title = data[position];

        holder.txtTitle.setText(title);

    }

    @Override

    public int getItemCount() {

        return data.length;

    }

    public class programmingViewHolder extends RecyclerView.ViewHolder {

        ImageView imgIcon;

        TextView txtTitle;

        public programmingViewHolder(View itemView) {

            super(itemView);

            imgIcon = itemView.findViewById(R.id.imgIcon);

            txtTitle = itemView.findViewById(R.id.txtTitle);

        }

    }

}

2. Apply or Implement in Main Activity

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        RecyclerView recyclerView=findViewById(R.id.programmingListRK);

        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        String[] lng={"Java","C Sharp","C plus plus","Dot net","PHP","Python","C Sharp","C plus plus","Dot net","PHP","Python","C Sharp","C plus plus","Dot net","PHP","Python"};

        recyclerView.setAdapter(new programmingAdapter(lng));

    }

}

List View

 ListView listView;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        listView = findViewById(R.id.lv1);

        ArrayList<String> arrayList = new ArrayList<>();

        arrayList.add("Ram");

        arrayList.add("Shyam");

        arrayList.add("Ghanshyam");

        arrayList.add("Murli Manohar");

        arrayList.add("Radhe Shyam");

        arrayList.add("Shyam Murari");

        arrayList.add("Ram");

        arrayList.add("Shyam");

        arrayList.add("Ghanshyam");

        arrayList.add("Murli Manohar");

        arrayList.add("Radhe Shyam");

        arrayList.add("Shyam Murari");

        arrayList.add("Shyam");

        arrayList.add("Ghanshyam");

        arrayList.add("Murli Manohar");

        arrayList.add("Radhe Shyam");

        arrayList.add("Shyam Murari");

        arrayList.add("Ram");

        arrayList.add("Shyam");

        arrayList.add("Ghanshyam");

        arrayList.add("Murli Manohar");

        ArrayAdapter arrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, arrayList);

        listView.setAdapter(arrayAdapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override

            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

                Toast.makeText(MainActivity.this, "Clicked : "+arrayList.get(i), Toast.LENGTH_SHORT).show();

            }

        });

    }

Text Property

Text complete width spreads like parent width (layout weight)

layout_weight="1"

Add Dependency in Android Studio

Dependency path

File > Project Structure >  Dependencies > All Modules > All Dependencies > + > 1.Library Dependency

Short cut  Alt+Ctrl+Shift+S