1.button按钮的点击事件怎么写xml文件代码如下： 四种方法分述如下：匿名内部类：public class TestButtonActivity extends Activity { Button btn1, btn2; Toast tst; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test_button); btn1 = (Button) findViewById(R.id.button1); btn2 = (Button) findViewById(R.id.button2); btn1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Toast tst = Toast.makeText(TestButtonActivity.this, "111111111", Toast.LENGTH_SHORT); tst.show(); } }); btn2.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Toast tst = Toast.makeText(TestButtonActivity.this, "222222222", Toast.LENGTH_SHORT); tst.show（)； } }）； } } 自定义单击事件监听类：public class TestButtonActivity extends Activity { Button btn1, btn2; Toast tst; class MyClickListener implements OnClickListener { @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.button1: tst = Toast.makeText(TestButtonActivity.this, "111111111", Toast.LENGTH_SHORT); tst.show(); break; case R.id.button2: tst = Toast.makeText(TestButtonActivity.this, "222222222", Toast.LENGTH_SHORT); tst.show(); break; default: break; } } } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test_button); btn1 = (Button) findViewById(R.id.button1); btn2 = (Button) findViewById(R.id.button2); btn1.setOnClickListener(new MyClickListener()); btn2.setOnClickListener(new MyClickListener()); } } Activity继承View.OnClickListener，由Activity实现OnClick(View view)方法，在OnClick(View view)方法中用switch-case对不同id代表的button进行相应的处理 public class TestButtonActivity extends Activity implements OnClickListener { Button btn1, btn2; Toast tst; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test_button); btn1 = (Button) findViewById(R.id.button1); btn2 = (Button) findViewById(R.id.button2); btn1.setOnClickListener(this); btn2.setOnClickListener(this); } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.button1: tst = Toast.makeText(this, "111111111", Toast.LENGTH_SHORT); tst.show(); break; case R.id.button2: tst = Toast.makeText(this, "222222222", Toast.LENGTH_SHORT); tst.show(); break; default: break； } } } 最后一种是我今天看到的一种写法，在XML文件中“显示指定按钮的onClick属性，这样点击按钮时会利用反射的方式调用对应Activity中的click（)方法” 这里在输完android：的时候按下 Alt+/ 会有 onClick 属性的提示，但输入到 android:onClick=“ 的地方按下 Alt+/ 并没有提示 onClick 选项，让我突然觉得这里好像有点问题 。
public class TestButtonActivity extends Activity { Button btn1, btn2; Toast tst; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test_button)； } // 注意 这里没有 @Override 标签 public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.button1: tst = Toast.makeText(this, "111111111", Toast.LENGTH_SHORT); tst.show(); break; case R.id.button2: tst = Toast.makeText(this, "222222222", Toast.LENGTH_SHORT); tst.show(); break; default: break； } } } 这种写法整个代码中都不用声明button就可以实现button的单击事件 。