Android实现Gallery相册组件开发

import android.app.AlertDialog;

import android.content.Context;

import android.content.DialogInterface;

import android.content.DialogInterface.OnClickListener;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.view.ViewGroup.LayoutParams;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.BaseAdapter;

import android.widget.Gallery;

import android.widget.ImageButton;

import android.widget.ImageSwitcher;

import android.widget.ImageView;

import android.widget.ImageView.ScaleType;

import android.widget.ViewSwitcher.ViewFactory;

publicclass AddContactActivity extends Activity {

ImageButton ibtnImgChoose;

AlertDialog imgChooseDialog;

Gallery gallery;

ImageSwitcher imageSwitcher;

int selectedImage;



privateint\[\] images \= { R.drawable.png0001, R.drawable.png0002,

        R.drawable.png0003, R.drawable.png0004, R.drawable.png0005,

        R.drawable.png0006, R.drawable.png0007, R.drawable.png0008,

        R.drawable.png0009, R.drawable.png0010, 

};

publicvoid onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

 

setContentView(R.layout.addcontact);

System.out.println("AddContact");

ibtnImgChoose = (ImageButton) findViewById(R.id.ibtnHead);

ibtnImgChoose.setOnClickListener(new View.OnClickListener() {

        publicvoid onClick(View v) {

            

initImageChoose();

            imgChooseDialog.show();

       

}

    });

}



privatevoid initImageChoose() {

 

LayoutInflater layoutInflater = LayoutInflater.from(this);

    View view \= layoutInflater.inflate(R.layout.userheadchoose, null);

    gallery \= (Gallery) view.findViewById(R.id.img\_gallery);

    gallery.setAdapter(new imageAdapter(this));

 

gallery.setSelection(images.length /2);

imageSwitcher = (ImageSwitcher) view.findViewById(R.id.img_switcher);

imageSwitcher.setFactory(new switcherFactory(this));

gallery.setOnItemSelectedListener(new OnItemSelectedListener() {

        publicvoid onItemSelected(AdapterView<?> arg0, View arg1,int arg2, long arg3) {

            

imageSwitcher.setImageResource(images[arg2]);

            selectedImage \= arg2;

       

}

publicvoid onNothingSelected(AdapterView<?> arg0) {

            // TODO Auto-generated method stub

        }

    });

 

AlertDialog.Builder builder =new AlertDialog.Builder(this);

  builder.setTitle("请选择图像");

 

builder.setPositiveButton("确认", new OnClickListener() {

publicvoid onClick(DialogInterface dialog, int which) {

ibtnImgChoose.setImageResource(images[selectedImage]);

        }

 

});

    builder.setNegativeButton("取消", new OnClickListener() {



        publicvoid onClick(DialogInterface dialog, 

int which) {

}

    });

    builder.setView(view);

    imgChooseDialog \= builder.create();

}

class imageAdapter extends BaseAdapter {

 

private Context context;

    public imageAdapter(Context context) {

        super();

        this.context = context;

    }



 

publicint getCount() {

        return images.length;

    }





  public Object getItem(int arg0) {

    

// TODO Auto-generated 

method stub

returnnull;

    }



 

publiclong getItemId(int position) {

        // TODO Auto-generated method 

stub

　　return0;

    }



    public View getView(int position, View convertView, ViewGroup parent) {

        ImageView imageView \=new ImageView(context);// 构造一个ImageView



      imageView.setImageResource(images\[position\]);// 设置ImageView图片源

       

　　　　　　imageView.setAdjustViewBounds(true);

　　　　　　imageView.setScaleType(ScaleType.FIT_XY);// 自适应高和宽

　　　　　　imageView.setLayoutParams(new Gallery.LayoutParams(80, 80));// 设置显示图处的大小

　　　　　　imageView.setPadding(10, 5, 10, 5);//

设置四边的距离

return imageView;

}

}



class switcherFactory implements ViewFactory {

    private Context context;



    public switcherFactory(Context context) 

{

        super();



      this.context = context;

    }



  public View makeView() 

{

        ImageView imageView \=new ImageView(context);

        imageView.setLayoutParams(new ImageSwitcher.LayoutParams(90, 90));

        return imageView;

    }

}

}