This article summarizes the Button event implementation and listening methods for Android development. Share it for your reference, as follows:
Let's first introduce two methods of implementing Button events
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:andro android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <Button android: android:text="Button 1" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android: android:text="Button 2" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">Hello World, ButtonDemoActivity!</string> <string name="app_name">ButtonDemo</string> </resources>
The first type:
：
package ;
import ;
import ;
import ;
import ;
import ;
import ;
public class ButtonDemoActivity extends Activity {
Button myButton1,myButton2;
@Override
public void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView();
myButton1=(Button)findViewById(.myButton1);
myButton2=(Button)findViewById(.myButton2);
//Register Button events using anonymous class (new OnClickListener()
{
public void onClick(View v)
{
(, "You clicked button 1",Toast.LENGTH_LONG).show();
}
});
(new OnClickListener()
{
public void onClick(View v)
{
(, "You clicked the button 2",Toast.LENGTH_LONG).show();
}
});
}
}
The second type:
：
package ;
import ;
import ;
import ;
import ;
import ;
import ;
public class ButtonDemoActivity extends Activity {
Button myButton1,myButton2;
@Override
public void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView();
myButton1=(Button)findViewById(.myButton1);
myButton2=(Button)findViewById(.myButton2);
(new ButtonClick());
(new ButtonClick());
}
//Create a class to respond to OnClickListener class ButtonClick implements OnClickListener
{
public void onClick(View v)
{
switch (()) {
case .myButton1:
(, "You clicked button 1",Toast.LENGTH_LONG).show();
break;
case .myButton2:
(, "You clicked the button 2",Toast.LENGTH_LONG).show();
break;
default:
break;
}
}
}
}
Let's talk about Button monitoring method
There are currently the following listening methods for Android button control:
A button control corresponds to a listener:
Button buttontest;
buttontest = (Button) findViewById(.button1);
(new () {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
("TEST", "button onClick");
}
});
Multiple buttons correspond to one listener:
start = (Button) findViewById(.button1);
stop = (Button) findViewById(.button2);
(mylistener );
(mylistener );
mylistener = new () {
@Override
public void onClick(View v) {
switch (()) {
case .button1:
(TAG, "Start to recorder video\n");
start_recorde();
break;
case .button2:
(TAG, "Stop to recorder video\n");
stop_recorde();
break;
default:
break;
}
}
};
Multiple buttons correspond to one listener 2:
public class MainActivity extends Activity implements {
//Interface elements private Button start;
private Button stop;
@Override
public void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView(.activity_main);
start = (Button) findViewById(.button1);
stop = (Button) findViewById(.button2);
(this);
(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(.activity_main, menu);
return true;
}
@Override
public void onClick(View v) {
switch (()) {
case .button1:
(TAG, "Start to recorder video\n");
break;
case .button2:
(TAG, "Stop to recorder video\n");
break;
default:
break;
}
}
}
Binding listener in xml:
<Button android: android:layout_height="wrap_content" android:layout_width="wrap_content" android:onClick="mybuttonlistener"> </Button>
The corresponding java code is as follows:
Button btn = (Button) findViewById(.button1);
public void mybuttonlistener(View target){
//do something5
}
From a personal point of view, the fourth implementation method is not recommended.
I hope this article will be helpful to everyone's Android programming design.