import java.io.ByteArrayOutputStream;  
    import java.io.File;  
    import android.app.Activity;  
    import android.content.Intent;  
    import android.graphics.Bitmap;  
    import android.net.Uri;  
    import android.os.Bundle;  
    import android.os.Environment;  
    import android.provider.MediaStore;  
    import android.view.View;  
    import android.view.View.OnClickListener;  
    import android.widget.Button;  
    import android.widget.ImageView;  
      
    public class testActivity extends Activity {  
      
        public static final int NONE = 0;  
        public static final int PHOTOHRAPH = 1;// 拍照  
        public static final int PHOTOZOOM = 2; // 缩放  
        public static final int PHOTORESOULT = 3;// 结果  
      
        public static final String IMAGE_UNSPECIFIED = "image/*";  
        ImageView imageView = null;  
        Button button0 = null;  
        Button button1 = null;  
      
        @Override  
        public void onCreate(Bundle savedInstanceState) {  
            super.onCreate(savedInstanceState);  
            setContentView(R.layout.main);  
            imageView = (ImageView) findViewById(R.id.imageID);  
            button0 = (Button) findViewById(R.id.btn_01);  
            button1 = (Button) findViewById(R.id.btn_02);  
      
            button0.setOnClickListener(new OnClickListener() {  
                @Override  
                public void onClick(View v) {  
                    Intent intent = new Intent(Intent.ACTION_PICK, null);  
                    intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);  
                    startActivityForResult(intent, PHOTOZOOM);  
                }  
            });  
      
            button1.setOnClickListener(new OnClickListener() {  
      
                @Override  
                public void onClick(View v) {  
                    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  
                    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp.jpg")));  
                    startActivityForResult(intent, PHOTOHRAPH);  
                }  
            });  
        }  
      
        @Override  
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
            if (resultCode == NONE)  
                return;  
            // 拍照  
            if (requestCode == PHOTOHRAPH) {  
                //设置文件保存路径这里放在跟目录下  
                File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg");  
                startPhotoZoom(Uri.fromFile(picture));  
            }  
              
            if (data == null)  
                return;  
              
            // 读取相册缩放图片  
            if (requestCode == PHOTOZOOM) {  
                startPhotoZoom(data.getData());  
            }  
            // 处理结果  
            if (requestCode == PHOTORESOULT) {  
                Bundle extras = data.getExtras();  
                if (extras != null) {  
                    Bitmap photo = extras.getParcelable("data");  
                    ByteArrayOutputStream stream = new ByteArrayOutputStream();  
                    photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);// (0 - 100)压缩文件  
                    imageView.setImageBitmap(photo);  
                }  
      
            }  
      
            super.onActivityResult(requestCode, resultCode, data);  
        }  
      
        public void startPhotoZoom(Uri uri) {  
            Intent intent = new Intent("com.android.camera.action.CROP");  
            intent.setDataAndType(uri, IMAGE_UNSPECIFIED);  
            intent.putExtra("crop", "true");  
            // aspectX aspectY 是宽高的比例  
            intent.putExtra("aspectX", 1);  
            intent.putExtra("aspectY", 1);  
            // outputX outputY 是裁剪图片宽高  
            intent.putExtra("outputX", 64);  
            intent.putExtra("outputY", 64);  
            intent.putExtra("return-data", true);  
            startActivityForResult(intent, PHOTORESOULT);  
        }  
    }  

    <?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="@string/hello" />  
        <ImageView android:id="@+id/imageID"  
            android:adjustViewBounds="true" android:maxWidth="50dip"  
            android:maxHeight="50dip" android:layout_width="wrap_content"  
            android:layout_height="wrap_content" />  
        <Button android:id="@+id/btn_01" android:layout_height="50dip"  
                android:text="相册" android:layout_width="150dip"/>  
        <Button android:id="@+id/btn_02" android:layout_height="50dip"  
                android:text="拍照" android:layout_width="150dip"/>  
    </LinearLayout>