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Android 的 Button 按钮实现的两种方式

第一组方式:

res/laoyout/activity_main.xml 代码:

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <Button        android:id="@+id/button"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/textView1"        android:layout_marginTop="51dp"        android:layout_toRightOf="@+id/textView1"        android:text="按钮" /></RelativeLayout>

 

MainActivity.java 代码:

package com.example.testbutton;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 MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        final Button bt = (Button) findViewById (R.id.button);               bt.setOnClickListener(new OnClickListener(){            @Override            public void onClick(View arg0) {                // TODO Auto-generated method stub                Toast.makeText(MainActivity.this,"亲,你点击按钮了 ",1000).show();                    }              }) ;           }}

 

第二组方式:

我们可以在布局文件中的Button属性中设置 onClick事件,

 

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <Button        android:id="@+id/button"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/textView1"        android:layout_marginTop="51dp"        android:layout_toRightOf="@+id/textView1"        android:onClick="clickMyself"        android:text="按钮" /></RelativeLayout>

MainActivity.java 代码:

package com.example.testbutton;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.Toast;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        final Button bt = (Button) findViewById (R.id.button);    }    public void clickMyself(View view){        Toast.makeText(MainActivity.this, "按钮被点击了", 2000).show();            }}

Android 的 Button 按钮实现的两种方式