intent class in android code example

Example 1: intent android

Intent intent = new Intent(MainActivity.this,Activity.class);

Example 2: intent in fragment android

Button button = (Button) rootView.findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent intent = new Intent(getActivity(), AnotherActivity.class);
        startActivity(intent);
    }
});

Example 3: intent android

Intent intent = new Intent(MainActivity.this,MainActivity2.class);
 intent.putExtra("key",value);
 startActivity(intent);
////////////////////
 String string =getIntent().getStringExtra("key");