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Android various definition of OnClickListeners.
public class AndroidOnClickDefinitionInXMLActivity extends Activity implements OnClickListener {
private Button buttonWithActivityAsListener;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonWithActivityAsListener = (Button) findViewById(R.id.button_with_activity_as_listener);
buttonWithActivityAsListener.setOnClickListener(this);
}
/** You implement this method after adding OnClickListener interface to your Activity. **/
public void onClick(View v) {
Toast.makeText(this, "Button with Activity as Listener has been clicked.", 2500).show();
}
//
}
public class AndroidOnClickDefinitionInXMLActivity extends Activity {
private Button buttonWithInlineAsListener;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonWithInlineAsListener = (Button) findViewById(R.id.button_with_inline_class_as_listener);
buttonWithInlineAsListener.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Toast.makeText(AndroidOnClickDefinitionInXMLActivity.this, "Button with Inline Class as Listener has been clicked.", 2500).show();
}
});
}
}
public class AndroidOnClickDefinitionInXMLActivity extends Activity {
private Button buttonWithInnerClassAsListener;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonWithInnerClassAsListener = (Button) findViewById(R.id.button_with_inner_class_as_listener);
buttonWithInnerClassAsListener.setOnClickListener(new InnerOnClickButtonListener());
}
/** Inner Class to respond to OnClick events. **/
class InnerOnClickButtonListener implements OnClickListener {
public void onClick(View v) {
Toast.makeText(AndroidOnClickDefinitionInXMLActivity.this, "Button with Inner Class as Listener has been clicked.", 2500).show();
}
}
}
public class AndroidOnClickDefinitionInXMLActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
/** Name of the method and it's triggering comes from main.xml file.
* Button's widget attribute android:onClick allows you to specify name of the method
* which you have to implement. **/
public void onButtonClick(View v) {
Toast.makeText(this, "Button Without a Listener has been clicked.", 2500).show();
}
//
}
package com.smartcloudcompany.onclickinxml;
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 AndroidOnClickDefinitionInXMLActivity extends Activity implements OnClickListener {
private Button buttonWithActivityAsListener;
private Button buttonWithInnerClassAsListener;
private Button buttonWithInlineAsListener;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonWithActivityAsListener = (Button) findViewById(R.id.button_with_activity_as_listener);
buttonWithActivityAsListener.setOnClickListener(this);
buttonWithInnerClassAsListener = (Button) findViewById(R.id.button_with_inner_class_as_listener);
buttonWithInnerClassAsListener.setOnClickListener(new InnerOnClickButtonListener());
buttonWithInlineAsListener = (Button) findViewById(R.id.button_with_inline_class_as_listener);
buttonWithInlineAsListener.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Toast.makeText(AndroidOnClickDefinitionInXMLActivity.this, "Button with Inline Class as Listener has been clicked.", 2500).show();
}
});
}
/** You implement this method after adding OnClickListener interface to your Activity. **/
public void onClick(View v) {
Toast.makeText(this, "Button with Activity as Listener has been clicked.", 2500).show();
}
//
/** Name of the method and it's triggering comes from main.xml file.
* Button's widget attribute android:onClick allows you to specify name of the method
* which you have to implement. **/
public void onButtonClick(View v) {
Toast.makeText(this, "Button Without a Listener has been clicked.", 2500).show();
}
//
/** Inner Class to respond to OnClick events. **/
class InnerOnClickButtonListener implements OnClickListener {
public void onClick(View v) {
Toast.makeText(AndroidOnClickDefinitionInXMLActivity.this, "Button with Inner Class as Listener has been clicked.", 2500).show();
}
}
}
<?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"
>
<Button android:id="@+id/button_with_activity_as_listener"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button with Activity As Listener"
android:layout_gravity="center_horizontal"
android:layout_marginTop="100dp"
/>
<Button android:id="@+id/button_without_listener"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button Without listener"
android:layout_gravity="center_horizontal"
android:onClick="onButtonClick"
/>
<Button android:id="@+id/button_with_inner_class_as_listener"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button With Inner Class As Listener"
android:layout_gravity="center_horizontal"
/>
<Button android:id="@+id/button_with_inline_class_as_listener"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button With Inline Class As Listener"
android:layout_gravity="center_horizontal"
/>
</LinearLayout>
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