Android 照片上传

解释全在代码中：

// 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;

 

} 

 转自https://blog.csdn.net/tao0001/article/details/7993007