很多時候android常用的控件不能滿足我們的需求，那么我們就需要自定義一個控件了。今天做了一個自定義控件的實例，來分享下。

????????????? 首先定義一個layout實現按鈕內部布局：

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

02	<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

03	????android:layout_width="fill_parent"

04	????android:layout_height="fill_parent"

05	????android:orientation="horizontal" >

06

?

07	????<ImageView

08	????????android:id="@+id/imageView1"

09	????????android:layout_width="wrap_content"

10	????????android:layout_height="wrap_content"

11	????????android:layout_gravity="center_vertical"

12	????????android:paddingBottom="5dip"

13	????????android:paddingLeft="40dip"

14	????????android:paddingTop="5dip"

15	????????android:src="@drawable/right_icon" />

16

?

17	????<TextView

18	????????android:id="@+id/textView1"

19	????????android:layout_width="wrap_content"

20	????????android:layout_height="wrap_content"

21	????????android:layout_gravity="center_vertical"

22	????????android:layout_marginLeft="8dip"

23	????????android:text="確定"

24	????????android:textColor="#000000" />

25

?

26	</LinearLayout>

??????? 接下來寫一個類繼承LinearLayout，導入剛剛的布局，并且設置需要的方法，從而使的能在代碼中控制這個自定義控件內容的顯示。

01	public class ImageBtn extends LinearLayout {

02

?

03	????private ImageView imageView;

04	????private TextView? textView;

05

?????

06	????public ImageBtn(Context context) {

07	????????super(context);

08	????????// TODO Auto-generated constructor stub

09

????}

10	????public ImageBtn(Context context, AttributeSet attrs) {

11	????????super(context, attrs);

12	????????// TODO Auto-generated constructor stub

13	????????LayoutInflater inflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

14	????????inflater.inflate(R.layout.imagebtn, this);

15	????????imageView=(ImageView) findViewById(R.id.imageView1);

16	????????textView=(TextView)findViewById(R.id.textView1);

17

????}

18

?????

19

????/**

20	?????* 設置圖片資源

21

?????*/?

22	????public void setImageResource(int resId) {?

23	????????imageView.setImageResource(resId);?

24

????}?

25

???

26

????/**

27	?????* 設置顯示的文字

28

?????*/?

29	????public void setTextViewText(String text) {?

30	????????textView.setText(text);?

31

????}?

32

?

33

}

???? 在需要使用這個自定義控件的layout中加入這控件，只需要在xml中加入即可。

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

02	<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

03	????android:layout_width="fill_parent"

04	????android:layout_height="fill_parent"

05	????android:orientation="horizontal" >

06

?

07	????<cn.com.karl.view.ImageBtn

08	????????android:id="@+id/btn_right"

09	????????android:layout_height="wrap_content"?

10	????????android:layout_width="wrap_content"

11	????????android:background="@drawable/btn"?

12	????????/>

13

?

14	????<cn.com.karl.view.ImageBtn

15	????????android:id="@+id/btn_error"

16	????????android:layout_marginLeft="5dp"

17	????????android:layout_height="wrap_content"?

18	????????android:layout_width="wrap_content"

19	????????android:background="@drawable/btn"?

20	????????/>

21

?

22	</LinearLayout>

??????? 這里用到了背景圖片 在drawable/btn.xml

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

2	<selector xmlns:android="http://schemas.android.com/apk/res/android" >

3

?

4	????<item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/btn_normal"></item>

5	????<item android:state_pressed="true" android:drawable="@drawable/btn_white"></item>

6	????<item android:state_checked="true" android:drawable="@drawable/btn_white"></item>

7	????<item android:state_focused="false" android:state_pressed="false" android:drawable="@drawable/btn_normal"></item>

8

?????

9	</selector>

?
最后在activity中設置該控件，和其他控件差不多：

01	public class IdentifyButtonActivity extends Activity {

02	???private ImageBtn imageBtn1;

03	???private ImageBtn imageBtn2;

04	????@Override

05	????protected void onCreate(Bundle savedInstanceState) {

06	????????// TODO Auto-generated method stub

07	????????super.onCreate(savedInstanceState);

08	????????setContentView(R.layout.identifybutton);

09

?????????

10	????????imageBtn1=(ImageBtn) this.findViewById(R.id.btn_right);

11	????????imageBtn2=(ImageBtn) this.findViewById(R.id.btn_error);

12	????????imageBtn1.setTextViewText("確定");

13	????????imageBtn2.setTextViewText("取消");

14	????????imageBtn1.setImageResource(R.drawable.right_icon);

15	????????imageBtn2.setImageResource(R.drawable.error_icon);

16

?????????

17	????????imageBtn1.setOnClickListener(new View.OnClickListener() {

18	?????????????

19	????????????public void onClick(View v) {

20	????????????????// TODO Auto-generated method stub

21	????????????????Toast.makeText(getApplicationContext(), "點擊的正確按鈕", 1).show();

22	????????????}

23	????????});

24

?????????

25	????????imageBtn2.setOnClickListener(new View.OnClickListener() {

26	?????????????

27	????????????public void onClick(View v) {

28	????????????????// TODO Auto-generated method stub

29	????????????????Toast.makeText(getApplicationContext(), "點擊的錯誤按鈕", 1).show();

30	????????????}

31	????????});

32

????}

33

}

??????? 最后看看我們自定義控件的效果吧！

???? 點擊后還有按下按鈕的效果。

轉載于:https://www.cnblogs.com/xgjblog/p/3633578.html

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