android-显示选择本地图片或拍照

原文地址  http://blog.csdn.net/shaojie519/article/details/7626962

[java]  view plain copy

 import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.ContentResolver;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.net.Uri;
 import android.os.Bundle;
 import android.provider.MediaStore;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.ImageView;

 public class PicChooserActivity extends Activity {
     /** Called when the activity is first created. */
     private ImageView  imageView;
     private OnClickListener imgViewListener;
     private Bitmap myBitmap;
     private byte[] mContent;
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         imageView  =(ImageView) findViewById(R.id.ivPic);

         imageView.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 final CharSequence[] items = { "相册", "拍照" };

                 AlertDialog dlg = new AlertDialog.Builder(PicChooserActivity.this).setTitle("选择照片").setItems(items,
                         new DialogInterface.OnClickListener() {

                             @Override
                             public void onClick(DialogInterface dialog, int which) {
                                 // TODO Auto-generated method stub
                             //这里item是根据选择的方式，   在items数组里面定义了两种方式，拍照的下标为1所以就调用拍照方法
                                 if(which==1){
                                     Intent getImageByCamera  = new Intent("android.media.action.IMAGE_CAPTURE");
                                     startActivityForResult(getImageByCamera, 1);
                                 }else{
                                     Intent getImage = new Intent(Intent.ACTION_GET_CONTENT);
                                     getImage.addCategory(Intent.CATEGORY_OPENABLE);
                                     getImage.setType("image/jpeg");
                                     startActivityForResult(getImage, 0);
                                 }

                             }
                         }).create();
                 dlg.show();
             }
         });

     }


     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         // TODO Auto-generated method stub
         super.onActivityResult(requestCode, resultCode, data);

         ContentResolver contentResolver  =getContentResolver();
          /**
          * 因为两种方式都用到了startActivityForResult方法，这个方法执行完后都会执行onActivityResult方法，
          * 所以为了区别到底选择了那个方式获取图片要进行判断，这里的requestCode跟startActivityForResult里面第二个参数对应
          */

         if(requestCode==0){

             //方式一
             /*try {
                  //获得图片的uri
                 Uri orginalUri = data.getData();
                   //将图片内容解析成字节数组
                 mContent = readStream(contentResolver.openInputStream(Uri.parse(orginalUri.toString())));
                  //将字节数组转换为ImageView可调用的Bitmap对象
                 myBitmap  =getPicFromBytes(mContent,null);
                   ////把得到的图片绑定在控件上显示
                 imageView.setImageBitmap(myBitmap);
             } catch (Exception e) {
                 e.printStackTrace();
                 // TODO: handle exception
             }*/

             //方式二
             try {
                 Uri selectedImage = data.getData();
                 String[] filePathColumn = { MediaStore.Images.Media.DATA };

                 Cursor cursor = getContentResolver().query(selectedImage,
                         filePathColumn, null, null, null);
                 cursor.moveToFirst();

                 int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                 String picturePath = cursor.getString(columnIndex);
                 cursor.close();
                 imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
             } catch (Exception e) {
                 // TODO: handle exception
                 e.printStackTrace();
             }


         }else if(requestCode==1){
             try {
                 Bundle extras = data.getExtras();
                 myBitmap = (Bitmap) extras.get("data");
                 ByteArrayOutputStream baos = new ByteArrayOutputStream();
                 myBitmap.compress(Bitmap.CompressFormat.JPEG , 100, baos);
                 mContent=baos.toByteArray();
             } catch (Exception e) {
                 e.printStackTrace();
                 // TODO: handle exception
             }
             imageView.setImageBitmap(myBitmap);
         }

     }

    public static Bitmap getPicFromBytes(byte[] bytes, BitmapFactory.Options opts) {
         if (bytes != null)
             if (opts != null)
                 return BitmapFactory.decodeByteArray(bytes, 0, bytes.length,opts);
             else
                 return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
         return null;
     }



  public static byte[] readStream(InputStream in) throws Exception{
      byte[] buffer  =new byte[1024];
      int len  =-1;
      ByteArrayOutputStream outStream = new ByteArrayOutputStream();

      while((len=in.read(buffer))!=-1){
          outStream.write(buffer, 0, len);
      }
      byte[] data  =outStream.toByteArray();
      outStream.close();
      in.close();
      return data;
  }

 }