Basics: Setting up Android buttons and binding events

Before adding a new activity to the app, we used the button and clicked the button to enter a new activity. Here is a simple summary of the use of buttons on Android.

Design a button is very simple, in the IDE generally have a graphical interface, you can also write yourself in XML, such as: Macau casino play

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1

<Button

2	android:id="@+id/nowamagicbtn"

3	android:layout_width="wrap_content"

4	android:layout_height="wrap_content"

5	android:text="前往PaintingActivity"/>

The next key is to give the button a couple of ways to bind the event.

The first type:

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01	privateButton button;

02

03

@Override

04	protectedvoidonCreate(Bundle savedInstanceState) {

05	super.onCreate(savedInstanceState);

06	setContentView(R.layout.activity_main);

07

08	button = (Button)findViewById(R.id.nowamagicbtn);

09

10	button.setOnClickListener(newOnClickListener(){

11

12

@Override

13	publicvoidonClick(View v) {

14	// TODO Auto-generated method stub

15	Intent intent = newIntent();

16	intent.setClass(MainActivity.this, PaintingActivity.class);

17	startActivity(intent);

18

}

19

20

});

21

}

The second type:

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01	privateButton button;

02

03

@Override

04	protectedvoidonCreate(Bundle savedInstanceState) {

05	super.onCreate(savedInstanceState);

06	setContentView(R.layout.activity_main);

07

08	button = (Button)findViewById(R.id.nowamagicbtn);

09	button.setOnClickListener(newButtonListener());

10

}

11

12	classButtonListener implementsOnClickListener{

13

14

@Override

15	publicvoidonClick(View v) {

16	if( v.getId() == R.id.nowamagicbtn){

17	Intent intent = newIntent();

18	intent.setClass(MainActivity.this, PaintingActivity.class);

19	startActivity(intent);

20

}

21

}

22

}

The third type:

View Source print?

01	privateButton button;

02

03

@Override

04	protectedvoidonCreate(Bundle savedInstanceState) {

05	super.onCreate(savedInstanceState);

06	setContentView(R.layout.activity_main);

07

08	button = (Button)findViewById(R.id.nowamagicbtn);

09	button.setOnClickListener(newButtonListener());

10

}

11

12	classButtonListener implementsOnClickListener{

13

14

@Override

15	publicvoidonClick(View v) {

16	// TODO Auto-generated method stub

17	Intent intent = newIntent();

18	intent.setClass(MainActivity.this, PaintingActivity.class);

19	startActivity(intent);

20

}

21

}

In fact, all are the same, are inherited Onclicklistener, and then rewrite its OnClick method. Summarize the convenience Yimeimei use.

Basics: Setting up Android buttons and binding events