girish3

Since each Activity is made to work in different purpose. Some is designed to work separately with each Intent sent for example an Activity for email composing in email client. While some is designed to work as a singleton for example an email's inbox Activity. That's why it does matter to specify whether Activity is needed to be created a new one or to use the existed one. launchMode is designed for this specifically.

launchMode can be assigned directly as an attribute tag

<activity
    android:name=".SingleTaskActivity"
    android:label="singleTask launchMode"
    android:launchMode="singleTask">

girish3

1. The following line is bold
   Hi, I am Bold (**Hi, I am Bold**)

2. The following line is given emphasis
   I am cooool. (*I am cooool.*)

3. To write something on the new line, give two spaces and hit enter
   Yay! we are on the next line

4. Now comes the Headline

girish3

regex for finding text with 2 substrings

Ex. 'git' and 'rm'

grep "git.*rm"

girish3

// https://stackoverflow.com/questions/10696986/how-to-set-the-part-of-the-text-view-is-clickable
SpannableString ss = new SpannableString("Android is a Software stack");
ClickableSpan clickableSpan = new ClickableSpan() {
    @Override
    public void onClick(View textView) {
        startActivity(new Intent(MyActivity.this, NextActivity.class));
    }
};
// 0 is the start index and 7 is the end index
ss.setSpan(clickableSpan, 0, 7, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

girish3

// if you are in an activity
LayoutInflater inflater = getLayoutInflater();
// If you have the context
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// or in a cleaner way, from() uses system service interally so its the same inflater
LayoutInflater inflater = LayoutInflater.from(context);

// inflating a view
// if you need to attach the inflated to rootView, returned view will be rootView.
// 3rd parameter is attach_to_root

girish3

// starting an activity from another activity
// this is a Activity context
Intent intent = new Intent(this, AnotherActivity.java);
intent.putExtra(Intent.EXTRA_TEXT, "some text");
intent.putExtra("id", 4);
startActivity(intent);


// Receiving intent in AnotherActivity
Bundle extras = getIntent().getExtras();

girish3

// this is a context
AlertDialog.Builder builder = new AlertDialog.Builder(this);
// Check other builder methods like setCancelable, setIcon..
builder.setTitle("Set Title");
builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
	public void onClick(DialogInterface dialog, int id) {
		// do something
  	}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

girish3

• File structure (Navigate to functions, variables of the same class)

  cmd + r

• Navigate Back to last cursor position

  cmd + [

• Navigate Forward

  cmd + ]

• Move Line/Lines up/down

girish3

// Taking the same Go example as above

// Human and Student structs ....

human := Human{"John"}
// human will be passed by value, new copy will be created.
student := Student{human, 1}

girish3

public class Human {
  public String name;
  
  public Human(String name) {
    this.name = name;
  }
}

public class Student {
  private Human human;