Android Code Snippets

AndroidSnippets.java

//Active Internet checker
public static boolean isNetworkConnected(Context context) {
      	ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
	return (cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isAvailable() && cm.getActiveNetworkInfo().isConnected());
	 }	
      //check for network activity
      if(isNetworkConnected(this)){
      //Internet is working
}else {
      //Internet is not working
}

//File picker
select = (Button) findViewById(R.id.btn_select);
select.setOnClickListener(new OnClickListener() {
    	@Override
	public void onClick(View v) {
	// start file chooser
	Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
	intent.setType("*/*");  
	intent.addCategory(Intent.CATEGORY_OPENABLE);
	startActivityForResult(
			Intent.createChooser(intent, "Select a file to upload"),
			FILE_SELECT_CODE);
			}
		});


//UI

	//Custom fonts
  	Typeface tfText = Typeface.createFromAsset(getAssets(),
                "fonts/Roboto-Regular.ttf");       
        TextView err = (TextView) findViewById(R.id.login_error);
        err.setTypeface(tfText);

	//Action bar
   	ActionBar actionBar = getSupportActionBar(); //show Action bar
 	actionBar.setDisplayHomeAsUpEnabled(true);    //Enable Action bar back button 
 	getSupportActionBar().setIcon(R.drawable.ic_sidemenu_icon);  //Customize Action bar icon
	getSupportActionBar().setDisplayShowHomeEnabled(false); //remove home icon
        getSupportActionBar().setTitle("Main Title"); //Custom title
        getSupportActionBar().setSubtitle("Sub Title"); //Custom sub title
	
	//Custom item in actionbar
        //Inflate the custom view
        View customNav = LayoutInflater.from(this).inflate(R.layout.nav_custom_view, null); //create nav_custom_view in layout
        //Attach to the action bar
        getSupportActionBar().setCustomView(customNav);
        getSupportActionBar().setDisplayShowCustomEnabled(true);
        

		        
		        

//Onclick events
//Return to previous activity [back functionality on button click]

Button backButton = (Button)this.findViewById(R.id.back);
backButton.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
    finish();
  }
});


//OnClick method for multiple buttons

@Override
public void onCreate(Bundle savedInstanceState) {
        button1.setOnClickListener(onClickListener);
        button2.setOnClickListener(onClickListener);
        button3.setOnClickListener(onClickListener);
}

private OnClickListener onClickListener = new OnClickListener() {
     @Override
     public void onClick(final View v) {
         switch(v.getId()){
             case R.id.button1:
                  //DO something
             break;
             case R.id.button2:
                  //DO something
             break;
             case R.id.button3:
                  //DO something
             break;
         }

   }
};

//AMAZON EC2

//upload type
// Add Content-Type value for uploaded images
// Ensure that the image will be treated as such.
ResponseHeaderOverrides override = new ResponseHeaderOverrides();
  			override.setContentType("image/jpeg");