Android 图片上传，包括从相册选取与拍照上传

gistfile1.java

// 拍照上传

private OnClickListener mUploadClickListener = new OnClickListener() {


public void onClick(View v) {

// 调用相机

Intent mIntent = new Intent("android.media.action.IMAGE_CAPTURE");


// 图片存储路径，可自定义

File tmpFile = new File(Environment.getExternalStorageDirectory(),

System.currentTimeMillis() + ".jpg");


// 获取这个图片的URI

originalUri = Uri.fromFile(tmpFile);//这是个实例变量，方便下面获取图片的时候用

mIntent.putExtra(MediaStore.EXTRA_OUTPUT, originalUri);


startActivityForResult(mIntent, ACTIVITY_IMAGE_CAPTURE);

}

};


// 打开相册

private OnClickListener mPicListClickListener = new OnClickListener() {


public void onClick(View v) {

// 调用相册

Intent mIntent= new Intent(Intent.ACTION_GET_CONTENT);

mIntent.addCategory(Intent.CATEGORY_OPENABLE);

mIntent.setType(MIME_TYPE_IMAGE_JPEG);


startActivityForResult(mIntent, ACTIVITY_GET_IMAGE);

}

};


监听事件写好了，怎么调用不用我说了吧。这是个startActivityForResult事件，对应的我们肯定得有个onActivityResult，贴之

protected void onActivityResult(int requestCode, int resultCode, Intent data) {


if (resultCode != RESULT_OK) {

return;

}


Bitmap bm = null;


ContentResolver resolver = getContentResolver();

String filePath = "/sdcard/bengxin/bx_upload_tmp.jpg";//这个是暂存图片的路径

FileOutputStream output = null;

try {

// 创建暂存图片

if (Utils.CreateFile(filePath)) {

output = new FileOutputStream(filePath);

} else {

throw new Exception("内部错误");

}

if (requestCode == ACTIVITY_GET_IMAGE) {

// 获得图片的uri

originalUri = data.getData();

PS:拍照的那个URI我们在上面已经获取了

}


/**** 获取图片开始 ****/

//mContent是上传的图片byte[]数组，得到这个后随便怎么处理，当然你也可以直接用fileInput流

fileInput = (FileInputStream) resolver.openInputStream(Uri

.parse(originalUri.toString()));


// 将图片内容解析成字节数组

mContent = getBytesFromInputStream(fileInput, 3500000);


fileInput.close();


// 将字节数组转换为ImageView可调用的Bitmap对象

bm = getPicFromBytes(mContent, null);


/********* 获取图片完了 ************/


// 将图片缩小到指定比例并且保存到缓存文件

float scale = ((float) 210) / ((float) bm.getWidth());

bm = Utils.smallBmp(bm, scale);//这个缩小功能是自己写的方法

//将Bitmap读到文件中去，注意这个是压缩，那个100是压缩比，0-100，越大质量越好

bm.compress(CompressFormat.JPEG, 100, output);

output.flush();

output.close();


/*********为了更快速的将图片上传，将缩小后的图片保存到暂存文件***************/

fileInput = new FileInputStream(filePath);


// 将图片内容解析成字节数组

mContent = getBytesFromInputStream(fileInput, 3500000);

fileInput.close();

/*********************/


// 预览一下你的图片吧

bm = bm.createScaledBitmap(bm, mButtomUpload.getWidth() - 10,

mButtomUpload.getHeight() - 10, true);

mButtomUpload.setImageBitmap(bm);

mButtomUpload.setPadding(2, 2, 2, 2);


} catch (Exception e) {

Utils.exceptionShow(CheckIn.this, e.getMessage());

}

}



附赠两个方法，一个将字节转换成bitmap，一个获取byte[]数组

private 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;

}


private static byte[] getBytesFromInputStream(InputStream is, int bufsiz)

throws IOException {

int total = 0;

byte[] bytes = new byte[4096];

ByteBuffer bb = ByteBuffer.allocate(bufsiz);


while (true) {

int read = is.read(bytes);

if (read == -1)

break;

bb.put(bytes, 0, read);

total += read;

}


byte[] content = new byte[total];

bb.flip();

bb.get(content, 0, total);


return content;

}