Summary of Button event implementation and listening methods developed by Android

This paper summarizes the Button event implementation and listening methods developed by Android. To share for your reference, the details are as follows:

Let's start with two approaches to implementing Button events

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 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:id="@+id/myButton1"
 android:text="  button 1 "
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 />
<Button
 android:id="@+id/myButton2"
 android:text="  button 2 "
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 />
</LinearLayout>

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <string name="hello">Hello World, ButtonDemoActivity!</string>
 <string name="app_name">ButtonDemo</string>
</resources>

1 species:

ButtonDemoActivity. java:

package com.android.ButtonDemo.activity;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class ButtonDemoActivity extends Activity {
 Button myButton1,myButton2;
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  myButton1=(Button)findViewById(R.id.myButton1);
  myButton2=(Button)findViewById(R.id.myButton2);
  // Use anonymous class registration Button The event 
  myButton1.setOnClickListener(new OnClickListener()
  {
   public void onClick(View v)
   {
    Toast.makeText(ButtonDemoActivity.this, " You click the button 1",Toast.LENGTH_LONG).show();
   }
  });
  myButton2.setOnClickListener(new OnClickListener()
  {
   public void onClick(View v)
   {
    Toast.makeText(ButtonDemoActivity.this, " You click the button 2",Toast.LENGTH_LONG).show();
   }
  });
 }
}

The second:

ButtonDemoActivity. java:

package com.android.ButtonDemo.activity;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class ButtonDemoActivity extends Activity {
 Button myButton1,myButton2;
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  myButton1=(Button)findViewById(R.id.myButton1);
  myButton2=(Button)findViewById(R.id.myButton2);
  myButton1.setOnClickListener(new ButtonClick());
  myButton2.setOnClickListener(new ButtonClick());
 }
 // create 1 Class to respond OnClickListener
 class ButtonClick implements OnClickListener
 {
  public void onClick(View v)
  {
   switch (v.getId()) {
   case R.id.myButton1:
    Toast.makeText(ButtonDemoActivity.this, " You click the button 1",Toast.LENGTH_LONG).show();
    break;
   case R.id.myButton2:
    Toast.makeText(ButtonDemoActivity.this, " You click the button 2",Toast.LENGTH_LONG).show();
    break;
   default:
    break;
   }
  }
 }
}

Let's talk about the Button listening method

At present, android button controls mainly have the following listening methods:

1 button control corresponds to 1 listener:

Button buttontest;
buttontest = (Button) findViewById(R.id.button1);
buttontest.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
  // TODO Auto-generated method stub
  Log.i("TEST", "button onClick");
 }
});

Multiple button correspond to one monitor 1:

start = (Button) findViewById(R.id.button1);
stop = (Button) findViewById(R.id.button2);
start.setOnClickListener(mylistener );
stop.setOnClickListener(mylistener );
View.OnClickListener mylistener = new View.OnClickListener() {
  @Override
  public void onClick(View v) {
   switch (v.getId()) {
   case R.id.button1:
    Log.d(TAG, "Start to recorder video\n");
    start_recorde();
    break;
   case R.id.button2:
    Log.d(TAG, "Stop to recorder video\n");
    stop_recorde();
    break;
   default:
    break;
   }
  }
};

Multiple button correspond to one monitor 2:

public class MainActivity extends Activity implements View.OnClickListener{
 // Interface elements 
 private Button start;
 private Button stop;
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  start = (Button) findViewById(R.id.button1);
  stop = (Button) findViewById(R.id.button2);
  start.setOnClickListener(this);
  stop.setOnClickListener(this);
 }
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  getMenuInflater().inflate(R.menu.activity_main, menu);
  return true;
 }
 @Override
 public void onClick(View v) {
  switch (v.getId()) {
  case R.id.button1:
   Log.d(TAG, "Start to recorder video\n");
   break;
  case R.id.button2:
   Log.d(TAG, "Stop to recorder video\n");
   break;
  default:
   break;
  }
 }
}

Binding listening in xml:

<Button
android:id="@+id/button1"
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(R.id.button1);
public void mybuttonlistener(View target){
 //do something5
}

Personally, the fourth implementation is not recommended.

I hope this article has been helpful for Android programming.