Monthly Archives: January 2017

Android Highlight selected item in a ListView

res/values/strings.xml

<resources>
    <string name="app_name">014</string>

    <string-array name="countries">
        <item>Iran</item>
        <item>Iraq</item>
        <item>India</item>
        <item>Italy</item>
        <item>United Kingdom</item>
        <item>United States</item>
        <item>Israel</item>
        <item>Kuwait</item>
    </string-array>
</resources>

res/values/colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#3F51B5</color>
    <color name="colorPrimaryDark">#303F9F</color>
    <color name="colorAccent">#FF4081</color>
    
    <color name="w3_camo_gray">#9495a5</color>
    <color name="Lemon_Yellow">#ffbb00</color>
</resources>

res/layout/listview_countries_custom_layout.xml

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

    <TextView
        android:text="TextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textViewListViewCountriesItem"
        android:gravity="center"
        android:paddingBottom="15px"
        android:textStyle="bold"
        android:textSize="18dp"
        android:background="@drawable/listview_countries_selector"/>
</LinearLayout>

res/drawable/listview_countries_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:state_pressed="true"
        android:drawable="@color/w3_camo_gray"
        ></item>

    <item
        android:state_selected="true"
        android:drawable="@color/Lemon_Yellow"
        ></item>
</selector>

res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="iterator.ir.a014.MainActivity">

    <ListView
        android:id="@+id/listviewCountries"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
</RelativeLayout>

MainActivity.java

ListView listViewCountries;
   String[] countries;
   ArrayAdapter<String> listViewArrayAdapter;

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

       countries=getResources().getStringArray(R.array.countries);

       listViewCountries= (ListView) findViewById(R.id.listviewCountries);

       listViewArrayAdapter=new ArrayAdapter<String>(getBaseContext(), R.layout.listview_countries_custom_layout, R.id.textViewListViewCountriesItem,countries);

       listViewCountries.setAdapter(listViewArrayAdapter);


       listViewCountries.setOnItemClickListener(new AdapterView.OnItemClickListener() {
           @Override
           public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
               Toast toast=Toast.makeText(getBaseContext(),parent.getItemAtPosition(position).toString(),Toast.LENGTH_SHORT);
               toast.show();

               view.setSelected(true);
           }
       });
   }

References
https://github.com/mhdr/AndroidSamples/tree/master/014

Android ListView with own layout

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="iterator.ir.a013.MainActivity">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:id="@+id/listViewCountries" />
</RelativeLayout>

listview_custom_layout.xml

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


    <TextView
        android:text="TextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/textViewListItem"
        android:gravity="center"
        android:textSize="18dp"
        android:textColor="@color/w3_highway_blue"
        android:paddingBottom="5dp"/>
</LinearLayout>

res/values/strings.xml

<resources>
    <string name="app_name">013</string>

    <string-array name="countries">
        <item>Iran</item>
        <item>Iraq</item>
        <item>India</item>
        <item>Italy</item>
        <item>Brazil</item>
        <item>France</item>
        <item>United Kingdom</item>
        <item>Pakistan</item>
        <item>Oman</item>
    </string-array>
</resources>

MainActivity.java

ListView listViewCountries;
    ArrayAdapter<String> arrayAdapter;
    String[] countries;

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


        countries=getResources().getStringArray(R.array.countries);

        listViewCountries= (ListView) findViewById(R.id.listViewCountries);

        arrayAdapter=new ArrayAdapter<String>(this, R.layout.listview_custom_layout, R.id.textViewListItem,countries);
        listViewCountries.setAdapter(arrayAdapter);

        listViewCountries.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast toast=Toast.makeText(getBaseContext(),parent.getItemAtPosition(position).toString(),Toast.LENGTH_LONG);
                toast.show();
            }
        });
    }

References
https://github.com/mhdr/AndroidSamples/tree/master/013

Android Working with ListView

activity_main.xml

<ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:id="@+id/listViewCountries" />

res/values/strings.xml

<resources>
    <string name="app_name">012</string>

    <string-array name="countries">
        <item>Iran</item>
        <item>India</item>
        <item>France</item>
        <item>Italy</item>
        <item>Iraq</item>
    </string-array>
</resources>

MainActivity.java

    ListView listViewCountries;
    ArrayAdapter<String> arrayAdapter;
    String[] countries;

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

        listViewCountries= (ListView) findViewById(R.id.listViewCountries);

        countries=getResources().getStringArray(R.array.countries);
        arrayAdapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,countries);

        listViewCountries.setAdapter(arrayAdapter);

        listViewCountries.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast toast=Toast.makeText(getBaseContext(),parent.getItemAtPosition(position).toString(),Toast.LENGTH_LONG);
                toast.show();
            }
        });
    }

References
https://github.com/mhdr/AndroidSamples/tree/master/012

Android Working with Spinner

activity_main.xml

    <Spinner
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@+id/textView"
        android:layout_toEndOf="@+id/textView"
        android:layout_marginLeft="30dp"
        android:layout_marginStart="30dp"
        android:id="@+id/spinnerCountries" />
    Spinner spinner;
    ArrayAdapter<String> spinnerAdapter;
    String[] countries;

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

        spinner= (Spinner) findViewById(R.id.spinnerCountries);

        countries=getResources().getStringArray(R.array.countries);

        spinnerAdapter=new ArrayAdapter(this,android.R.layout.simple_spinner_item,countries);
        spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        spinner.setAdapter(spinnerAdapter);

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                Toast toast=Toast.makeText(getBaseContext(),parent.getSelectedItem().toString(),Toast.LENGTH_LONG);
                toast.show();
            }

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

            }
        });
    }

References
https://github.com/mhdr/AndroidSamples/tree/master/011

Android Working with Toggle Button

    <ToggleButton
        android:textOn="Bluetooth On"
        android:textOff="Bluetooth Off"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:id="@+id/toggleButtonBluetooth"
        />

    <Switch
        android:textOff="Wifi Off"
        android:textOn="Wifi On"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="54dp"
        android:id="@+id/switchWifi"
        android:layout_below="@+id/toggleButtonBluetooth"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:text="Wifi" />

MainActivity.java

    ToggleButton toggleButtonBluetooth;
    Switch switchWifi;
    TextView textViewWifi;
    TextView textViewBluetooth;

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


        toggleButtonBluetooth= (ToggleButton) findViewById(R.id.toggleButtonBluetooth);
        switchWifi= (Switch) findViewById(R.id.switchWifi);
        textViewBluetooth= (TextView) findViewById(R.id.textViewBluetooth);
        textViewWifi= (TextView) findViewById(R.id.textViewWifi);

        textViewBluetooth.setText("");
        textViewWifi.setText("");

        switchWifi.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked)
                {
                    textViewWifi.setText("Wifi is On");
                }
                else {
                    textViewWifi.setText("Wifi is Off");
                }
            }
        });


        switchWifi.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // both are correct
            }
        });

        toggleButtonBluetooth.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Boolean isChecked=((ToggleButton) v).isChecked();

                if (isChecked)
                {
                    textViewBluetooth.setText("Bluetooth is On");
                }
                else {
                    textViewBluetooth.setText("Bluetooth is Off");
                }
            }
        });
    }

References
https://www.youtube.com/watch?v=RnpIY4UK87E&index=15&list=PLshdtb5UWjSp0879mLeCsDQN6L73XBZTk
https://github.com/mhdr/AndroidSamples/tree/master/010