答案 0 :(得分:196)
答案 1 :(得分:76)
或者您可以尝试相同但没有听众。在您的按钮XML定义:
android:onClick="ButtonOnClick"
在您的代码中定义方法ButtonOnClick
:
public void ButtonOnClick(View v) {
switch (v.getId()) {
case R.id.button1:
doSomething1();
break;
case R.id.button2:
doSomething2();
break;
}
}
答案 2 :(得分:42)
我更喜欢:
class MTest extends Activity implements OnClickListener {
public void onCreate(Bundle savedInstanceState) {
...
Button b1 = (Button) findViewById(R.id.b1);
Button b2 = (Button) findViewById(R.id.b2);
b1.setOnClickListener(this);
b2.setOnClickListener(this);
...
}
然后:
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.b1:
....
break;
case R.id.b2:
....
break;
}
}
Switch
- case
比if
- else
更容易维护,而且此实现不需要制作许多类变量。
答案 3 :(得分:15)
Five Ways to Wire Up an Event Listener是一篇很棒的文章,概述了设置单个事件监听器的各种方法。让我在这里为多个听众扩展。
public class main extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//attach an instance of HandleClick to the Button
HandleClick handleClick = new HandleClick();
findViewById(R.id.button1).setOnClickListener(handleClick);
findViewById(R.id.button2).setOnClickListener(handleClick);
}
private class HandleClick implements OnClickListener{
public void onClick(View view) {
switch(view.getId()) {
case R.id.button1:
// do stuff
break;
case R.id.button2:
// do stuff
break;
}
}
}
}
public class main extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.button1).setOnClickListener(handleClick);
findViewById(R.id.button2).setOnClickListener(handleClick);
}
private OnClickListener handleClick = new OnClickListener() {
public void onClick(View view) {
switch (view.getId()) {
case R.id.button1:
// do stuff
break;
case R.id.button2:
// do stuff
break;
}
}
};
}
public class main extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
public void onClick(View view) {
// do stuff
}
});
findViewById(R.id.button2).setOnClickListener(new OnClickListener() {
public void onClick(View view) {
// do stuff
}
});
}
}
public class main extends Activity implements OnClickListener {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.button1).setOnClickListener(this);
findViewById(R.id.button2).setOnClickListener(this);
}
public void onClick(View view) {
switch (view.getId()) {
case R.id.button1:
// do stuff
break;
case R.id.button2:
// do stuff
break;
}
}
}
public class main extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void HandleClick(View view) {
switch (view.getId()) {
case R.id.button1:
// do stuff
break;
case R.id.button2:
// do stuff
break;
}
}
}
在xml中:
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="HandleClick" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="HandleClick" />
答案 4 :(得分:12)
另一种方法是从活动中获得一个监听器,如下所示:
public class MyActivity extends Activity implements OnClickListener {
....... code
//my listener
@Override
public void onClick(View v) {
if (v.getId() == R.id.mybutton) {
DoSomething();
return;
}
if (v.getId() == R.id.mybutton2) {
DoSomething2();
return;
}
}
}
我喜欢用单个IF而不是switch-else来做,但如果您愿意,那么您应该这样做:
//my listener
@Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.mybutton:
{
DoSomething();
break;
}
case R.id.mybutton2:
{
DoSomething();
break;
}
}
}
答案 5 :(得分:12)
如果您不想在类代码中保存2按钮的实例,请遵循这种更好的方式(这更清晰,更快!!):
public void buttonPress(View v) {
switch (v.getId()) {
case R.id.button_one:
// do something
break;
case R.id.button_two:
// do something else
break;
case R.id.button_three:
// i'm lazy, do nothing
break;
}
}
答案 6 :(得分:9)
答案 7 :(得分:7)
使用setTag();
像这样:@Override
public void onClick(View v) {
int tag = (Integer) v.getTag();
switch (tag) {
case 1:
System.out.println("button1 click");
break;
case 2:
System.out.println("button2 click");
break;
}
}
答案 8 :(得分:4)
答案 9 :(得分:4)
Button mybutton = new Button(ViewPagerSample.this);
mybutton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
答案 10 :(得分:1)
Button button1 = (Button)findViewById(R.id.button1);
button1.setOnClickListener(this);
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v.getId() == R.id.button1){
Toast.makeText(context, "Button 1 Click", Toast.LENGTH_LONG).show();
}
}