Android-UI-Steuerungsserie: Schaltfläche (Schaltfläche)

<?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="这是个Button示例"  
    />  
<Button  
        android:layout_width="fill_parent"------充满父控件  
        android:layout_height="wrap_content"------充满内容  
        android:id="@+id/button1"----设置button的ID  
        android:text="按钮一"    ------设置按钮的文本显示信息，也可以用string  
/>  
<Button  
        android:layout_width="150dip"---按钮二的宽度  
        android:layout_height="30dip"---按钮二的高度  
        android:background="#aa00aa"---设置按钮背景颜色  
        android:textColor="#00aa00"---设置按钮二里的文本颜色  
        android:layout_gravity="center"---设置控件居中显示，注意：android:gravity="center"表是文本在控件中居中显示  
        android:id="@+id/button2"  
        android:text="按钮二"  
/>  
</LinearLayout>

package org.loulijun.button;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class TestButton extends Activity {
    /** Called when the activity is first created. */
        private Button btn1,btn2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn1=(Button)findViewById(R.id.button1);---获得父控件id
        btn2=(Button)findViewById(R.id.button2);
        //为控件设置监听，当点击了按钮一，就弹出一个提示，当点击按钮二，退出程序
        btn1.setOnClickListener(new Button.OnClickListener()
        {

                        @Override
                        public void onClick(View arg0) {
                                // TODO Auto-generated method stub
                                Toast toast=Toast.makeText(TestButton.this, "你点击了按钮"+btn1.getText().toString(), Toast.LENGTH_SHORT);
                                toast.setGravity(Gravity.TOP,0,150);
                                toast.show();
                        }

        });
        btn2.setOnClickListener(new Button.OnClickListener()
        {

                        @Override
                        public void onClick(View v) {
                                // TODO Auto-generated method stub
                                TestButton.this.finish();
                        }

        });
    }
}

public class TestButton extends Activity{  
private Button btn1,btn2;  
public void onCreate(Bundle savedInstanceState)  
{  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        btn1=(Button)findViewById(R.id.button1);  
        btn2=(Button)findViewById(R.id.button2);  
        btn1.setWidth(150);--设置按钮宽度，当然也可以用setHeight()来设置高度  
        btn2.setWidth(100);  
        btn1.setText("按钮一");---设置按钮文本显示信息  
        btn2.setText("安妮二");  
        btn1.setTextColor(Color.GREEN);---设置按钮内文本颜色  
        btn2.setTextColor(Color.RED);  
        btn1.setTextSize(30);---设置按钮内文本大小  
        btn2.setTextSize(20);  
        btn2.setBackgroundColor(Color.RED);---设置按钮背景颜色  
}  
}