Question

android activity 实现 OnClickListener 接口，触发报异常！！！！！！！！

public class BundleActivity extends Activity implements OnClickListener{
/** Called when the activity is first created. */
private Button button;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button =(Button) findViewById(R.id.myButton);
button.setOnClickListener(new BundleActivity());
}

public void onClick(View v) {
Intent intent = new Intent();
Bundle bundle = new Bundle();
bundle.putString("name", "wezhu");
bundle.putString("age","123");
intent.putExtras(bundle);
intent.setClass(BundleActivity.this, ForwardActivity.class);
startActivity(intent);
}

}

button.setOnClickListener(new BundleActivity());
为什么这行代码不能用？？

Answer 1

button.setOnClickListener(new BundleActivity());
应该改为：button.setOnClickListener(this);意思是监听现在activity的按钮。
New了一个activity，这个activity也没显示，监听它的按钮没有意义。

还有就是implements OnClickListener：implements是不可以覆盖父类里的函数，在public void onClick(View v)前加一个@Override，就Ok了

Answer 2

拜托，你这完全写错了啊！
应该这样写！
public class BundleActivity extends Activity implements OnClickListener{
/** Called when the activity is first created. */
private Button button;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button =(Button) findViewById(R.id.myButton);
button.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent();
Bundle bundle = new Bundle();
bundle.putString("name", "wezhu");
bundle.putString("age","123");
intent.putExtras(bundle);
intent.setClass(BundleActivity.this, ForwardActivity.class);
startActivity(intent);

}
});
}

}