Sample CheckedTextView in listview , Reading contacts all emails

Here, you can find the example of checked textview in the listview and read all email address in the android phone

1. Design the main Layout & row Layout with Checked TextView
Main.xml
< ListView android:id="@+id/listView1" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:background="#ffffff" />

Row.xml
< CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/checkedTextView1" android:paddingLeft="20dip"
android:paddingRight="20dip" android:paddingTop="10dip"
android:paddingBottom="10dip" android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="?android:attr/listPreferredItemHeight"
android:gravity="center_vertical" android:checkMark="@android:drawable/checkbox_off_background"
android:textColor="#000000" />

2. Create the CursurAdpater

private class ContactListAdapter extends CursorAdapter {

public ContactListAdapter(Context context, Cursor c) {
super(context, c);
}

@Override
public void bindView(View view, Context context, Cursor cursor) {
String o = cursor
.getString(cursor
.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
CheckedTextView tt = (CheckedTextView) view
.findViewById(R.id.checkedTextView1);
tt.setText(o);
}

@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
View v;
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row, null);
return v;
}
}
3. set the Contact Cursor to the ContactListAdapter
ContentResolver cr = getContentResolver();
Cursor emails = cr.query(
ContactsContract.CommonDataKinds.Email.CONTENT_URI, null, null,
null, null);
l.setAdapter(new ContactListAdapter(this, emails));


4. Change the State while select the Item
l.setOnItemClickListener(new OnItemClickListener() {

public void onItemClick(AdapterView arg0, View v, int arg2,
long arg3) {

CheckedTextView tt = (CheckedTextView) v
.findViewById(R.id.checkedTextView1);
if (!tt.isChecked()) {
tt.setChecked(true);
tt.setCheckMarkDrawable(android.R.drawable.checkbox_on_background);
} else {
tt.setChecked(false);
tt.setCheckMarkDrawable(android.R.drawable.checkbox_off_background);
}

}
});

5. Add the Contact Read Permission in androidmanifest.xml
< uses-permission android:name="android.permission.READ_CONTACTS" />


Sample Program :

public class ContactListingActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView l = (ListView) findViewById(R.id.listView1);
Cursor emails = getContentResolver().query(
ContactsContract.CommonDataKinds.Email.CONTENT_URI, null, null,
null, null);
l.setAdapter(new ContactListAdapter(this, emails));
l.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView arg0, View v, int arg2,
long arg3) {
CheckedTextView tt = (CheckedTextView) v
.findViewById(R.id.checkedTextView1);
if (!tt.isChecked()) {
tt.setChecked(true);
tt.setCheckMarkDrawable(android.R.drawable.checkbox_on_background);
} else {
tt.setChecked(false);
tt.setCheckMarkDrawable(android.R.drawable.checkbox_off_background);
}

}
});

}

private class ContactListAdapter extends CursorAdapter {
public ContactListAdapter(Context context, Cursor c) {
super(context, c);
}

@Override
public void bindView(View view, Context context, Cursor cursor) {
String o = cursor
.getString(cursor
.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
CheckedTextView tt = (CheckedTextView) view
.findViewById(R.id.checkedTextView1);
tt.setText(o);
}

@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
View v;
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row, null);
return v;
}
}
}

Gesture based action

Here we are discussing about how to set that as the gesture listener for the views that I add.

My requirement : I have list of images in a listview with url. When the user wants view the full image then user click the image on the list view

it will take to me the anonther activity and open in a imageview. and as a user wants to tee the next nexe or previous image with come back to listview page

Solution : I have created the HashMap Contains the list of images and pass the selected images name as bundle string. In a detail view created the async task the fetch image from the internet

implement the gestureListener. In this article we discussing about that

Related : gesture move action, gesture based action, example geatures

1. Create a Activity implements OnClickListener

public class MySample1Activity extends Activity implements OnClickListener {

........

}

2. Initialize below required object for gestureListener

ViewConfiguration vc;

static int SWIPE_MAX_OFF_PATH = 250;

static int SWIPE_MIN_DISTANCE = 100;

static int SWIPE_THRESHOLD_VELOCITY = 100;

private GestureDetector gestureDetector;

View.OnTouchListener gestureListener;

3. Set Densitybased velocity

vc = ViewConfiguration.get(this);

SWIPE_MIN_DISTANCE = vc.getScaledTouchSlop();

SWIPE_THRESHOLD_VELOCITY = vc.getScaledMinimumFlingVelocity();

4. Create a Custom GestureListener class which extends SimpleOnGestureListener

class MyGestureDetector extends SimpleOnGestureListener {

}

5. Override the onFling() and implement the geature move action

@Override

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,

float velocityY) {

try {

if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)

return false;

// right to left swipe

if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE

&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {

Toast.makeText(MySample1Activity.this, "Left Swipe",

Toast.LENGTH_SHORT).show();

} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE

&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {

Toast.makeText(MySample1Activity.this, "Right Swipe",

Toast.LENGTH_SHORT).show();

}

} catch (Exception e) {

// nothing

}

return false;

}

Full SourceCode

public class MySample1Activity extends Activity implements OnClickListener {

/** Called when the activity is first created. */

TextView tView;

ViewConfiguration vc;

static int SWIPE_MAX_OFF_PATH = 250;

static int SWIPE_MIN_DISTANCE = 100;

static int SWIPE_THRESHOLD_VELOCITY = 100;

private GestureDetector gestureDetector;

View.OnTouchListener gestureListener;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

tView = (TextView) findViewById(R.id.textview1);

vc = ViewConfiguration.get(this);

SWIPE_MIN_DISTANCE = vc.getScaledTouchSlop();

SWIPE_THRESHOLD_VELOCITY = vc.getScaledMinimumFlingVelocity();

gestureDetector = new GestureDetector(new MyGestureDetector());

gestureListener = new View.OnTouchListener() {

public boolean onTouch(View v, MotionEvent event) {

if (gestureDetector.onTouchEvent(event)) {

return true;

}

return false;

}

};

tView.setOnClickListener(this);

tView.setOnTouchListener(gestureListener);

}

class MyGestureDetector extends SimpleOnGestureListener {

@Override

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,

float velocityY) {

try {

if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)

return false;

// right to left swipe

if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE

&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {

Toast.makeText(MySample1Activity.this, "Left Swipe",

Toast.LENGTH_SHORT).show();

} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE

&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {

Toast.makeText(MySample1Activity.this, "Right Swipe",

Toast.LENGTH_SHORT).show();

}

} catch (Exception e) {

// nothing

}

return false;

}

}

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

}

}