Button

1.Button的各种监听

package com.example.android_button;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.view.View.OnKeyListener;
import android.view.View.OnTouchListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener,OnTouchListener,OnKeyListener,
OnFocusChangeListener{
	private int value=1;
	private Button button1;
	private Button button2;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button1=(Button) findViewById(R.id.button1);
		button2=(Button) findViewById(R.id.button2);
		button1.setOnClickListener(this);
		button2.setOnClickListener(this);
		button2.setOnKeyListener(this);
		button2.setOnTouchListener(this);
		button2.setOnFocusChangeListener(this);
	}
	
	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		Button button=(Button)v;
		if(value==1&&(button.getWidth()==getWindowManager().getDefaultDisplay().getWidth())){
			value=-1;
		}else if(value==-1&&button.getWidth()<200 ){
			value=1;
		}
		button.setWidth((int) (button.getWidth()*1.1));
		button.setHeight((int) (button.getHeight()*1.1));
	}
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public void onFocusChange(View v, boolean hasFocus) {
		// TODO Auto-generated method stub
		if(hasFocus){
			v.setBackgroundColor(Color.BLACK);
		}else{
			v.setBackgroundColor(Color.BLUE);
		}
	}

	@Override
	public boolean onKey(View v, int keyCode, KeyEvent event) {
		// TODO Auto-generated method stub
		if(event.getAction()==KeyEvent.ACTION_DOWN){
			v.setBackgroundColor(Color.BLACK);
		}else if(event.getAction()==KeyEvent.ACTION_UP){
			v.setBackgroundColor(Color.BLUE);
		}
		return false;
	}

	@Override
	public boolean onTouch(View v, MotionEvent event) {
		// TODO Auto-generated method stub
		if(event.getAction()==MotionEvent.ACTION_DOWN ){
			v.setBackgroundColor(Color.BLACK);
		}else if(event.getAction()==MotionEvent.ACTION_UP){
			v.setBackgroundColor(Color.BLUE);
		}
		return false;
	}

}

2.Button的图文混排，按钮添加属性和在java代码中添加两种不同方式

<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"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:drawableTop="@drawable/pic6"
        android:text="我是button1" />
    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:drawableBottom="@drawable/pic6"
        android:text="我是button2" />
    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:drawableLeft="@drawable/pic6"
        android:drawableRight="@drawable/pic6"
        android:text="我是button3" />
    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
      />
</LinearLayout>

package com.example.android_button02;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.DynamicDrawableSpan;
import android.text.style.ImageSpan;
import android.view.Menu;
import android.widget.Button;

public class MainActivity extends Activity {

	private Button button;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button=(Button) findViewById(R.id.button4);
		SpannableString spannableStringLeft=new SpannableString("left");
		Bitmap bitmap=BitmapFactory.decodeResource(getResources(),R.drawable.pic6);
		ImageSpan imageSpan=new ImageSpan(bitmap,DynamicDrawableSpan.ALIGN_BOTTOM);
		spannableStringLeft.setSpan(imageSpan, 0, 4, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
		SpannableString spannableStringRight=new SpannableString("right");
		Bitmap bitmap1=BitmapFactory.decodeResource(getResources(),R.drawable.pic6);
		ImageSpan imageSpan1=new ImageSpan(bitmap1,DynamicDrawableSpan.ALIGN_BOTTOM);
		spannableStringRight.setSpan(imageSpan1, 0, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
		button.append(spannableStringLeft);
		button.append("我的button4");
		button.append(spannableStringRight);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}