Location service (android)

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public class LocationTestActivity extends Activity implements LocationListener { private LocationManager service; private TextView tv; private String provider; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv = (TextView) findViewById(R.id.display); // Get the location manager service = (LocationManager) getSystemService(Context.LOCATION_SERVICE); Criteria criteria = new Criteria(); provider = service.getBestProvider(criteria, false); Location location = service.getLastKnownLocation(provider); // Initialize the location fields if (location != null) { onLocationChanged(location); } else { tv.setText("Location not available"); } boolean enabled = service.isProviderEnabled(LocationManager.GPS_PROVIDER); if (!enabled) { Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); startActivity(intent); } } public void onLocationChanged(Location arg0) { //int lat = (int) (location.getLatitude()); //int lng = (int) (location.getLongitude()); //latituteField.setText(String.valueOf(lat)); //longitudeField.setText(String.valueOf(lng)); String lat = String.valueOf(arg0.getLatitude()); String lon = String.valueOf(arg0.getLongitude()); Log.e("GPS", "location changed: lat="+lat+", lon="+lon); tv.setText("lat="+lat+", lon="+lon); } public void onProviderDisabled(String arg0) { Toast.makeText(this, "Disabled provider " + provider,Toast.LENGTH_SHORT).show(); Log.e("GPS", "provider disabled " + arg0); } public void onProviderEnabled(String arg0) { Toast.makeText(this, "Enabled new provider " + provider, Toast.LENGTH_SHORT).show(); Log.e("GPS", "provider enabled " + arg0); } public void onStatusChanged(String arg0, int arg1, Bundle arg2) { Log.e("GPS", "status changed to " + arg0 + " [" + arg1 + "]"); } /* Request updates at startup */ @Override protected void onResume() { super.onResume(); service.requestLocationUpdates(provider, 400, 1, this); } /* Remove the locationlistener updates when Activity is paused */ @Override protected void onPause() { super.onPause(); service.removeUpdates(this); } }

Simple ListView 2 - with Dialog (android)

public class HelloListViewActivity extends ListActivity {

    String[] data;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // storing string resources into Array
        data = getResources().getStringArray(R.array.data);
        // Binding resources Array to ListAdapter
        this.setListAdapter(new ArrayAdapter<String>(this, R.layout.list_cell, R.id.label, data));

        ListView lv = getListView();
        lv.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                createDialog(data[position]);
            }
        });
    }

    private void createDialog(String s)
    {
        new AlertDialog.Builder(this)
        .setTitle("Message")
        .setMessage("Go to " + s + " page ?")
        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {

            }
        })
        .setNegativeButton("No", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {

            }
        })
        .show();    
    }
}

Simple ListView (android)

res/layout/list_cell.xml

<?xml version="1.0" encoding="utf-8"?>
<!--  Single List Item Design -->
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/label"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:padding="10dip"
        android:textSize="16dip"
        android:textStyle="bold" >
</TextView>

res/values/list.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string-array name="data">

        <item>Apple</item>

        <item>Orange</item>

        <item>Banana</item>

        <item>Milk</item>

    </string-array>

</resources>

import android.app.Activity;

import android.app.ListActivity;

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.ListView;

public class HelloListViewActivity extends ListActivity {

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

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        // storing string resources into Array

        String[] data = getResources().getStringArray(R.array.data);

        // Binding resources Array to ListAdapter

        this.setListAdapter(new ArrayAdapter<String>(this, R.layout.list_cell, R.id.label, data));

    }

}

ImageView from URL

public class ImageLoadActivity extends Activity{

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
     
        LinearLayout m_linear = new LinearLayout(this);
        m_linear.setOrientation(LinearLayout.VERTICAL);
     
        ImageView i = new ImageView(this);
        m_linear.addView(i);
     
        new DownloadImage(i).execute("http://www.mobisights.com/wp-content/uploads/2012/08/001028312.jpg");

        setContentView(m_linear);
    }
 
    private class DownloadImage extends AsyncTask<String, Void, Bitmap> {
        ImageView image;

        public DownloadImage(ImageView image) {
            this.image = image;
        }

        protected Bitmap doInBackground(String... urls) {
            String urldisplay = urls[0];
            Bitmap bitmap = null;
            try {
                InputStream in = new java.net.URL(urldisplay).openStream();
                bitmap = BitmapFactory.decodeStream(in);
            } catch (Exception e) {
                Log.e("Error", e.getMessage());
                e.printStackTrace();
            }
            return bitmap;
        }

        protected void onPostExecute(Bitmap result) {
            image.setImageBitmap(result);
        }
    }
}

Find UIViewController from UIView (iphone)

- (UIViewController*)viewController
{
    for (UIView* next = [self superview]; next; next = next.superview)
    {
        UIResponder* nextResponder = [next nextResponder];

        if ([nextResponder isKindOfClass:[UIViewController class]])
        {
            return (UIViewController*)nextResponder;
        }
    }

    return nil;
}

UIButton - Programmetically (iphone)

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
   
    UIButton *myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    myButton.frame = CGRectMake((320-100)/2, (460-44)/2, 100, 44);
    [myButton setTitle:@"Click Me" forState:UIControlStateNormal];
    [myButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:myButton];
    myButton.tag = 100;
   
}

-(void)buttonClicked:(id)sender
{
    NSArray *subviews = [self.view subviews];
    if ([subviews count] == 0) return;
    for (UIView *subview in subviews) {
       
        NSLog(@"%@", subview);

    }
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

@end

Rotate Image with SeekBar - Programmetically

public class ImageLoadActivity extends Activity implements OnSeekBarChangeListener{

    private ImageView i;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LinearLayout m_linear = new LinearLayout(this);
        m_linear.setOrientation(LinearLayout.VERTICAL);
       
        Bitmap image = BitmapFactory.decodeResource(getResources(), R.drawable.akb48);
        Matrix matrix = new Matrix();
        matrix.postRotate(0);

        SeekBar bar = new SeekBar(this);
        bar.setOnSeekBarChangeListener(this);
        m_linear.addView(bar);
       
        i = new ImageView(this);
        rotateImage(0);
        m_linear.addView(i);

        setContentView(m_linear);
    }
   
    private void rotateImage(int degree)
    {
        Bitmap image = BitmapFactory.decodeResource(getResources(), R.drawable.akb48);
        Matrix matrix = new Matrix();
        matrix.postRotate(degree);
        Bitmap rotated = Bitmap.createBitmap(image, 0, 0, image.getWidth(), image.getHeight(), matrix, true);
        i.setImageBitmap(rotated);
    }
   
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
    {
        rotateImage((int)Math.round(progress*3.6));
    }

    public void onStartTrackingTouch(SeekBar arg0) {
    }
    public void onStopTrackingTouch(SeekBar arg0) {
    }
}

ImageView - rotate image

public class ImageLoadActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LinearLayout m_linear = new LinearLayout(this);
        m_linear.setOrientation(LinearLayout.VERTICAL);
     
        Bitmap image = BitmapFactory.decodeResource(getResources(), R.drawable.akb48);
        Matrix matrix = new Matrix();
        matrix.postRotate(30);

        Bitmap rotated = Bitmap.createBitmap(image, 0, 0, image.getWidth(), image.getHeight(), matrix, true);

        ImageView i = new ImageView(this);
        i.setImageBitmap(rotated);
     
        m_linear.addView(i);
        setContentView(m_linear);
    }
}

ImageView - Programmetically

public class ImageLoadActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LinearLayout m_linear = new LinearLayout(this);
        m_linear.setOrientation(LinearLayout.VERTICAL);
       
        ImageView i = new ImageView(this);
        i.setImageResource(R.drawable.akb48);
        i.setPadding(50, 50, 50, 50);
        m_linear.addView(i,newLayoutParams(
                LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));

        //m_linear.addView(i);
        setContentView(m_linear);
}
}

Add Event to Button - onClickListener

public class ButtonClickActivity extends Activity {

  private Button m_button;
    /** Called when the activity is first created. */
    @Override
  public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
     
  LinearLayout m_linear = new LinearLayout(this);
  m_linear.setOrientation(LinearLayout.VERTICAL);
     
  m_button = new Button(this);
  m_button.setText("Hello World");
     
  m_button.setOnClickListener(new Button.OnClickListener(){
            public void onClick(View arg0) {

  m_button.setText("click");

            }
  });
     
  m_linear.addView(m_button);
  setContentView(m_linear);
    }
}

Add a Button - Programmetically

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.LinearLayout;

public class HelloActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        LinearLayout m_linear = new LinearLayout(this);
        m_linear.setOrientation(LinearLayout.VERTICAL);
     
        Button m_button = new Button(this);
        m_button.setText("Hello World");
     
        m_linear.addView(m_button);
        setContentView(m_linear);
    }
}