相册

java文件：

package com.drision.demo;

import java.io.File;
import java.util.ArrayList;
import java.util.Calendar;

import com.example1.demoview.R;

import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.ViewGroup.OnHierarchyChangeListener;
import android.widget.Button;
import android.widget.HorizontalScrollView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import android.widget.Toast;

public class MainActivity extends Activity {
    private Button btn_camera;
    private MainActivity _this;
    private Uri fileUri;
    private HorizontalScrollView horizontalScrollView;
    private LinearLayout linearLayou;
    private ArrayList<ImageView> list = new ArrayList<ImageView>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        horizontalScrollView = (HorizontalScrollView) findViewById(R.id.horizontal);
        linearLayou = (LinearLayout) findViewById(R.id.gallery);
        _this = this;
        btn_camera = (Button) findViewById(R.id.button1);
        String path = Environment.getExternalStorageDirectory() + "/image";
        File file = new File(path);
        if(!file.exists()){
        	file.mkdirs();
        }
        
        String time = Calendar.getInstance().getTime().toString();
        File mediaFile = new File(file.getAbsolutePath(),time + ".jpg");
        fileUri = Uri.fromFile(mediaFile);
        
        btn_camera.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
				intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
				intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
				startActivityForResult(intent, 100);
			}
        });
    }
    
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if(resultCode == _this.RESULT_OK){
			if(requestCode == 100){
				ImageView image = new ImageView(_this);
				LinearLayout.LayoutParams llparams = new LinearLayout.LayoutParams(80, 80);
				image.setLayoutParams(llparams);
				if(data != null){
					if(data.hasExtra("data")){
						Bitmap thumbnail = data.getParcelableExtra("data");
						image.setImageBitmap(thumbnail);
					}
				}else{
					int width = image.getLayoutParams().width;
					int height = image.getLayoutParams().height;
					
					BitmapFactory.Options option = new Options();
					option.inJustDecodeBounds = true;
					BitmapFactory.decodeFile(fileUri.getPath(), option);
					
					int imageW = option.outWidth;
					int imageH = option.outHeight;
					int scale = Math.max(imageW / width,  imageH / height);
					
					option.inJustDecodeBounds = false;
					option.inSampleSize = scale;
					Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(), option);
					image.setImageBitmap(bitmap);
					linearLayou.addView(image);
					if(linearLayou.getChildCount() > 0){
						horizontalScrollView.setVisibility(View.VISIBLE);
					}
				}
			}
		}
	}
}

 xml文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >
    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:text="Button"
        android:textSize="20sp" />
   	<HorizontalScrollView
   	    android:id="@+id/horizontal" 
        android:layout_width="fill_parent"  
        android:layout_height="90dp"  
        android:layout_gravity="center_vertical"
        android:visibility="gone"
        android:scrollbars="none" > 
        <LinearLayout  
            android:id="@+id/gallery"  
            android:layout_width="wrap_content"  
            android:layout_height="wrap_content"
            android:orientation="horizontal" >  
        </LinearLayout>  
    </HorizontalScrollView>  

</LinearLayout>