Android点击Button实现功能的几种方法总结

  default:
   break;
  }
 }

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button1 测试"
        />
     <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button2 测试"
        />
      <Button
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button3 测试"
        android:onClick="clickHandler"
        />

</LinearLayout>

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener{

 private Button button1 = null;
 private Button button2 = null;

 public void findButton() {
  button1 = (Button)findViewById(R.id.button1);
  button2 = (Button)findViewById(R.id.button2);
 }

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  findButton();
  button2.setOnClickListener(this);

  button1.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    System.out.println("您点击了Button1");
   }
  });
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.activity_main, menu);
  return true;
 }

 @Override
 public void onClick(View v) {
  // TODO Auto-generated method stub
  switch (v.getId()) {
  case R.id.button2:
   System.out.println("您点击了Button2");
   break;

  default:
   break;
  }
 }

 public void clickHandler(View view) {
  System.out.println("您点击了Button3");
 }

}