java代码实现布局_java代码实现相对布局

packagegto.ImageSwitchTest;importjava.io.File;importjava.io.FileReader;importandroid.R.drawable;importandroid.app.Activity;importandroid.graphics.drawable.Drawable;importandroid.os.Bundle;importandroid.os.Environment;importandroid.text.AlteredCharSequence;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;importandroid.widget.FrameLayout;importandroid.widget.ImageSwitcher;importandroid.widget.ImageView;importandroid.widget.RelativeLayout;importandroid.widget.RelativeLayout.LayoutParams;importandroid.widget.ViewSwitcher.ViewFactory;publicclassImageSwitchTestextendsActivityimplementsOnClickListener,ViewFactory{/**Called when the activity is first created.*/privateFile[] m_imgList;privateImageSwitcher m_ImageSwitch;privatestaticintm_picIndex;privatestaticintIMAGESWITCHER_ID=0x123456;privatestaticintButtonStartID=0x2000000;

@OverridepublicvoidonCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//创建一个相对布局RelativeLayout main_View=newRelativeLayout(this);//创建一个ImageSwitcherm_ImageSwitch=newImageSwitcher(this);//在相对布局中添加图片切换器RelativeLayout.LayoutParams param=newRelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT);

main_View.addView(m_ImageSwitch,param);

m_ImageSwitch.setId(IMAGESWITCHER_ID);

m_ImageSwitch.setFactory(this);

File file=Environment.getExternalStorageDirectory();

String strPic=file+"\mag\mag01\";

File magdir=newFile(strPic);

m_imgList=magdir.listFiles();

Drawable myDrawable=Drawable.createFromPath(m_imgList[m_picIndex].toString());

m_ImageSwitch.setImageDrawable(myDrawable);

setContentView(main_View);//创建按钮intcount=m_imgList.length;for(inti=count-1; i>=0;--i)

{

Button btn=newButton(this);

btn.setId(ButtonStartID+i);

btn.setText(Integer.toString(i));

btn.setOnClickListener(this);

param=newRelativeLayout.LayoutParams(20,20);if( count-1==i ){

param.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

}else{

param.addRule(RelativeLayout.LEFT_OF,ButtonStartID+i+1);

}

param.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);

btn.setLayoutParams(param);

main_View.addView(btn,param);

}

}

@OverridepublicvoidonClick(View v) {//TODO Auto-generated method stubm_picIndex=v.getId()-ButtonStartID;

Drawable myDrawable=Drawable.createFromPath(m_imgList[m_picIndex].toString());

m_ImageSwitch.setImageDrawable(myDrawable);

}

@OverridepublicView makeView() {//TODO Auto-generated method stubreturnnewImageView(this);

}

}