Step-by-step _android Development Course [17]_ User interface button

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Browse Links: http://blog.csdn.net/y18334702058/article/details/44624305

• Topic: Button for user interface

button and ImageButton control instances:

Activity_main.xml Source code:

<?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/btn"  android:layout_height  =< Span class= "Hljs-value" > "wrap_content"  android:layout_width  = "wrap_content"  android:text  =" I am button "/>     <ImageButtonandroid:id="@+id/imgbtn"android:layout_height="Wrap _content "android:layout_width=" Wrap_content "android:src=" @drawable/myimage " />                                 </linearlayout>

A listener event that instantiates it in Mainactivity.java and adds a button click:

Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.util.Log;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.widget.Button;ImportAndroid.widget.ImageButton; Public  class mainactivity extends Activity {    PrivateButton btn;PrivateImageButton imgbtn;@Override    protected void onCreate(Bundle savedinstancestate) {Super. OnCreate (Savedinstancestate); Setcontentview (R.layout.activity_main);//instantiation of EditTextBTN = (Button) Findviewbyid (R.ID.BTN);        IMGBTN = (ImageButton) Findviewbyid (R.ID.IMGBTN); Btn.setonclicklistener (NewOnclicklistener () {@Override             Public void OnClick(View arg0) {//TODO auto-generated method stubLOG.V ("------------","I'm a button.");        }        }); Imgbtn.setonclicklistener (NewOnclicklistener () {@Override             Public void OnClick(View arg0) {//TODO auto-generated method stubLOG.V ("------------","I'm ImageButton.");    }        }); }}

Operation Result:

Click the first button:
Logcat window Display

Click the second button:
Logcat window Display

Focus on technology, enjoy life! --qq:804212028
Browse Links: http://blog.csdn.net/y18334702058/article/details/44624305

Step-by-step _android Development Course [17]_ User interface button