Android开发之Button事件实现方法的总结

下面介绍Button事件实现的两种方法

main.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:orientation="vertical"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. >
7. <TextView
8. android:layout_width="fill_parent"
9. android:layout_height="wrap_content"
10. android:text="@string/hello"
11. />
12. <Button
13. android:id="@+id/myButton1"
14. android:text=" 按钮1 "
15. android:layout_width="wrap_content"
16. android:layout_height="wrap_content"
17. />
18. <Button
19. android:id="@+id/myButton2"
20. android:text=" 按钮2 "
21. android:layout_width="wrap_content"
22. android:layout_height="wrap_content"
23. />
24. </LinearLayout>

strings.xml

1. <?xml version="1.0" encoding="utf-8"?>
2. <resources>
3. <string name="hello">Hello World, ButtonDemoActivity!</string>
4. <string name="app_name">ButtonDemo</string>
5. </resources>

第一种：

ButtonDemoActivity.java

1. package com.android.ButtonDemo.activity;
2. import android.app.Activity;
3. import android.os.Bundle;
4. import android.view.View;
5. import android.view.View.OnClickListener;
6. import android.widget.Button;
7. import android.widget.Toast;
8. public class ButtonDemoActivity extends Activity {
9. Button myButton1,myButton2;
10. @Override
11. public void onCreate(Bundle savedInstanceState) {
12. super.onCreate(savedInstanceState);
13. setContentView(R.layout.main);
14. myButton1=(Button)findViewById(R.id.myButton1);
15. myButton2=(Button)findViewById(R.id.myButton2);
16. //使用匿名类注册Button事件
17. myButton1.setOnClickListener(new OnClickListener()
18. {
19. public void onClick(View v)
20. {
21. Toast.makeText(ButtonDemoActivity.this, "你点击了按钮1",Toast.LENGTH_LONG).show();
22. }
23. });
24. myButton2.setOnClickListener(new OnClickListener()
25. {
26. public void onClick(View v)
27. {
28. Toast.makeText(ButtonDemoActivity.this, "你点击了按钮2",Toast.LENGTH_LONG).show();
29. }
30. });
31. }
32. }

第二种：

ButtonDemoActivity.java

1. package com.android.ButtonDemo.activity;
2. import android.app.Activity;
3. import android.os.Bundle;
4. import android.view.View;
5. import android.view.View.OnClickListener;
6. import android.widget.Button;
7. import android.widget.Toast;
8. public class ButtonDemoActivity extends Activity {
9. Button myButton1,myButton2;
10. @Override
11. public void onCreate(Bundle savedInstanceState) {
12. super.onCreate(savedInstanceState);
13. setContentView(R.layout.main);
14. myButton1=(Button)findViewById(R.id.myButton1);
15. myButton2=(Button)findViewById(R.id.myButton2);
16. myButton1.setOnClickListener(new ButtonClick());
17. myButton2.setOnClickListener(new ButtonClick());
18. }
19. //创建一个类，来响应OnClickListener
20. class ButtonClick implements OnClickListener
21. {
22. public void onClick(View v)
23. {
24. switch (v.getId()) {
25. case R.id.myButton1:
26. Toast.makeText(ButtonDemoActivity.this, "你点击了按钮1",Toast.LENGTH_LONG).show();
27. break;
28. case R.id.myButton2:
29. Toast.makeText(ButtonDemoActivity.this, "你点击了按钮2",Toast.LENGTH_LONG).show();
30. break;
31. default:
32. break;
33. }
34. }
35. }
36. }