Four Ways to read button click events in Android

<span id="Label3"></p><p><p><strong><span style="font-size:18px">title, There are four types of button click events in android, such AS.</span></strong></p></p><p><p><strong><span style="font-size:18px">Interface for four button+ a textview+ a ImageView</span></strong></p></p><p><p><br></p></p><p><p><strong><span style="font-size:18px">The Activity_main layout file is as Follows:</span></strong></p></p><p><p></p></p><pre name="code" class="html"><?xml version= "1.0" encoding= "utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "xmlns:tools=" Http://schemas.android.com/tools "android:layout_width=" match_parent "android:layout_height = "match_parent" android:orientation= "vertical" android:padding= "5dp" tools:context= ". Mainactivity "> <button android:id=" @+id/btn_click1 "android:layout_width=" match_parent "android oid:layout_height= "wrap_content" android:text= "@string/click1"/> <button android:id= "@+id/btn_clic K2 "android:layout_width=" match_parent "android:layout_height=" wrap_content "android:text=" @string/cl Ick2 "/> <button android:id=" @+id/btn_click3 "android:layout_width=" match_parent "android:la yout_height= "wrap_content" android:text= "@string/click3"/> <button android:layout_width= "match_par ENT "android:layout_height=" wrap_content "android: onclick= "click4" android:text= "@string/click4"/> <textview android:id= "@+id/tv_text" Andro Id:layout_width= "wrap_content" android:layout_height= "wrap_content" android:textcolor= "@android: color/holo_r Ed_light "android:textsize=" 18sp "/> <imageview android:id=" @+id/iv_yc "android:layout_width= "wrap_content" android:layout_height= "wrap_content"/></linearlayout></pre><strong><strong><span style="font-size:18px">the main interface implements the following Code:</span></strong></strong><p><p></p></p><p><p></p></p><pre name="code" class="java">Package Clickevent.ithema.com.clickevent;import Android.app.activity;import Android.os.bundle;import Android.view.view;import Android.widget.button;import Android.widget.imageview;import android.widget.TextView; public class Mainactivity extends Activity implements View.onclicklistener {private TextView tv_text; Private Button btn_click1,btn_click2,btn_click3; Private ImageView iv_yc; @Override protected void onCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (r.layout.activity_main); Tv_text = (TextView) Findviewbyid (r.id.tv_text); iv_yc= (ImageView) Findviewbyid (r.id.iv_yc); Btn_click1 = (Button) Findviewbyid (r.id.btn_click1); Btn_click2 = (Button) Findviewbyid (r.id.btn_click2); Btn_click3 = (Button) Findviewbyid (r.id.btn_click3); Btn_click2.setonclicklistener (this);//this is the way to implement the interface click Btn_click3.setonclicklistener (new mylistener ());// This is the way the custom class implements the interface click Btn_click1.setoncliCklistener (new view.onclicklistener () {//implement Anonymous inner class click Method @Override public void OnClick (View V) { Tv_text.settext ("this is an anonymous internal class click method, applicable to only one click method"); Iv_yc.setimageresource (r.drawable.click1); } }); } @Override public void OnClick (View V) {tv_text.settext ("this is the way to implement Interface clicks"); Iv_yc.setimageresource (r.drawable.click2); } class MyListener implements View.onclicklistener {@Override public void OnClick (View V) {t V_text.settext ("this is the way the custom class implements the interface click"); Iv_yc.setimageresource (r.drawable.click3); }} public void Click4 (View V) {tv_text.settext ("this is the method of defining attributes in an XML file"); Iv_yc.setimageresource (r.drawable.click4); }}</span><span style= "font-size:18px;font-weight:bold;" ></span></pre><br><strong>the <strong><span style="font-size:24px; color:#ff0000">Following is a separate code after splitting:</span></strong></strong><p><p></p></p><p><p><strong><span style="font-size:18px">Method One: Anonymous Inner class method</span></strong></p></p><p><p></p></p><pre name="code" class="java">Package Clickevent.ithema.com.clickevent;import Android.app.activity;import Android.os.bundle;import Android.view.view;import Android.widget.button;import Android.widget.imageview;import android.widget.TextView;/** * Created by Administrator on 2016/7/16. */public class Click1 extends activity{private TextView tv_text;//text box private ImageView iv_yc;//picture box private Butt On Btn_click1;//button @Override protected void onCreate (Bundle Savedinstancestate) {super.oncreate (savedinstanc eState); Setcontentview (r.layout.activity_main); tv_text= (TextView) Findviewbyid (r.id.tv_text);//find The ID of the text box iv_yc= (ImageView) Findviewbyid (r.id.iv_yc);//find The ID of the picture box btn_click1= (button) Findviewbyid (r.id.btn_click1);//find The ID of the button btn_click1.setonclicklistener (new view.onclick Listener () {//set listening @Override//button Click to unlock the method public void OnClick (View V) {//set The text to be displayed Tv_text.settext ("this is an anonymous internal class click method, applicable to only one click method"); Set the picture to display Iv_yc.setimageresource (r.drawable.click1); } }); }}</pre><strong><strong><span style="font-size:18px">method Two: Implement Interface</span></strong></strong><br><p><p></p></p><p><p></p></p><pre name="code" class="java">Package Clickevent.ithema.com.clickevent;import Android.app.activity;import Android.os.bundle;import Android.view.view;import Android.widget.button;import Android.widget.imageview;import android.widget.TextView;/** * Created by Administrator on 2016/7/16. */public class Click2 extends Activity implements View.onclicklistener {//implement Listener interface private TextView tv_text;//text box Priv Ate ImageView iv_yc;//picture Box private button Btn_click2;//button @Override protected void onCreate (Bundle Savedinstancest Ate) {super.oncreate (savedinstancestate); Setcontentview (r.layout.activity_main); tv_text= (TextView) Findviewbyid (r.id.tv_text);//find The ID of the text box iv_yc= (ImageView) Findviewbyid (r.id.iv_yc);//find The ID of the picture box btn_click2= (Button) Findviewbyid (r.id.btn_click2); Find the ID of the button btn_click2.setonclicklistener (this);//set the button to listen} @Override//button Click to unlock the public void OnClick (View V {//set the text to be displayed Tv_text.settext ("this is the way to implement the interface click"); Set the picture to display Iv_yc.sEtimageresource (r.drawable.click2); }}</pre><strong><strong><span style="font-size:18px">Method Three: custom class implementation interface</span></strong></strong><p><p></p></p><p><p></p></p><pre name="code" class="java">Package Clickevent.ithema.com.clickevent;import Android.app.activity;import Android.os.bundle;import Android.view.view;import Android.widget.button;import Android.widget.imageview;import android.widget.TextView;/** * Created by Administrator on 2016/7/16. */public class Click3 extends Activity {private TextView tv_text;//text box private ImageView iv_yc;//picture box private but ton Btn_click3;//button @Override protected void onCreate (Bundle Savedinstancestate) {super.oncreate (savedinstan cestate); Setcontentview (r.layout.activity_main); Tv_text = (TextView) Findviewbyid (r.id.tv_text);//find The ID of the text box iv_yc= (ImageView) Findviewbyid (r.id.iv_yc);//find The ID of the picture box Btn_click3 = (button) Findviewbyid (r.id.btn_click3);//find The ID of the button btn_click3.setonclicklistener (new mylistener ());//set Listener for Button class MyListener implements View.onclicklistener {//custom MyListener class implements Onclicklistener interface @Overri De public void OnClick (View V) {//set The text to be displayed Tv_text.settext ("this is the way the custom class implements the interface click"); Set the picture to display Iv_yc.setimageresource (r.drawable.click3); } }}</pre><strong><strong><span style="font-size:18px">method Four: Define the OnClick property in the XML file</span></strong></strong><br>1. Define the onclick attribute in the XML file:<p><p></p></p><p><p></p></p><pre name="code" class="html"><pre name="code" class="html"><button android:layout_width= "match_parent" android:layout_height= "wrap_content" android:o nclick= "click4" android:text= "@string/click4"/></pre></pre>2. How to write a click in Java code:<p><p></p></p><p><p></p></p><pre name="code" class="java"><pre name="code" class="java">Package Clickevent.ithema.com.clickevent;import Android.app.activity;import Android.os.bundle;import Android.view.view;import android.widget.imageview;import android.widget.textview;/** * Created by Administrator on 2016/7/16. */public class Click4 extends Activity { private TextView tv_text;//text box private ImageView iv_yc;//picture Box @ Override protected void onCreate (Bundle Savedinstancestate) { super.oncreate (savedinstancestate); Setcontentview (r.layout.activity_main); Tv_text = (TextView) Findviewbyid (r.id.tv_text);//find The ID of the text box iv_yc= (ImageView) Findviewbyid (r.id.iv_yc);// Find the ID of the picture frame } public void Click4 (View v) { //set The text to be displayed Tv_text.settext ("this is the method of defining attributes in an XML file"); Set the picture to display Iv_yc.setimageresource (r.drawable.click4);} }</pre></pre><br><span style="font-size:18px">the <span style="font-size:18px"><strong>above is my study in the summary of the buttons of the four kinds of click events, if there are shortcomings, please give criticism, thank you! </strong></span></span><br><br><br><p><p></p></p><p><p>Four Ways to read button click events in Android</p></p></span>