Android开发从相册中选取照片的示例代码

 //在这里跳转到手机系统相册里面    Intent intent = new Intent(        Intent.ACTION_PICK,        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);    startActivityForResult(intent, IMAGE_REQUEST_CODE);

 @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    //在相册里面选择好相片之后调回到现在的这个activity中    switch (requestCode) {      case IMAGE_REQUEST_CODE://这里的requestCode是我自己设置的，就是确定返回到那个Activity的标志        if (resultCode == RESULT_OK) {//resultcode是setResult里面设置的code值          try {            Uri selectedImage = data.getData(); //获取系统返回的照片的Uri            String[] filePathColumn = {MediaStore.Images.Media.DATA};            Cursor cursor = getContentResolver().query(selectedImage,                filePathColumn, null, null, null);//从系统表中查询指定Uri对应的照片            cursor.moveToFirst();            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);            path = cursor.getString(columnIndex); //获取照片路径            cursor.close();            Bitmap bitmap = BitmapFactory.decodeFile(path);            iv_photo.setImageBitmap(bitmap);          } catch (Exception e) {            // TODO Auto-generatedcatch block            e.printStackTrace();          }        }        break;    }  }

// 使用意图直接调用手机相册    Intent intent = new Intent(        Intent.ACTION_PICK,        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);    // 打开手机相册,设置请求码    startActivityForResult(intent, IMAGE_REQUEST_CODE);

 @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {    if (resultCode != RESULT_OK) {      return;    } else {      switch (requestCode) {        case IMAGE_REQUEST_CODE:          resizeImage(data.getData());          break;        case RESIZE_REQUEST_CODE:          if (data != null) {            showResizeImage(data);          }          break;      }    }    super.onActivityResult(requestCode, resultCode, data);  }  //这里增加裁剪  public void resizeImage(Uri uri) {    Intent intent = new Intent("com.android.camera.action.CROP");    intent.setDataAndType(uri, "image/*");    intent.putExtra("crop", "true");    intent.putExtra("aspectX", 1);    intent.putExtra("aspectY", 1);    //裁剪的大小    intent.putExtra("outputX", 150);    intent.putExtra("outputY", 150);    intent.putExtra("return-data", true);    //设置返回码    startActivityForResult(intent, RESIZE_REQUEST_CODE);  }  private void showResizeImage(Intent data) {    Bundle extras = data.getExtras();    if (extras != null) {      Bitmap photo = extras.getParcelable("data");      //裁剪之后设置保存图片的路径      String path = getFilesDir().getPath() + File.separator + IMAGE_FILE_NAME;      //压缩图片      ImageUtils.saveImage(photo, path);      new BitmapDrawable();      Drawable drawable = new BitmapDrawable(photo);      iv_photo.setImageDrawable(drawable);    }  }