Android简单的Button事件处理

res/layout/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"    android:id="@+id/tvText"/><Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="Button" android:id="@+id/mBtn"></Button></LinearLayout>

src/EX03_07.java

package gphone.ex03_07;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class EX03_07 extends Activity {    /** Called when the activity is first created. */TextView tvText=null;Button mBtn=null;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                tvText=(TextView)this.findViewById(R.id.tvText);        mBtn=(Button)this.findViewById(R.id.mBtn);                mBtn.setOnClickListener(new OnClickListener(){ public void onClick(View v) { // TODO Auto-generated method stub tvText.setText("Hi,Every Body!!!!"); }});     }}

运行结果

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