前言：

Android M相比6.0以前的需要許可權，其他的跟之前的沒區別：

if ((ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)||
        (ContextCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)) {
    //如果沒有授權，則請求授權
 
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA,Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
} else {

// create Intent to take a picture and return control to the calling application
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
 
File file = new File(Environment.getExternalStorageDirectory().getPath(), "camera.png");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file)); // set the image file name
// start the image capture Intent
startActivityForResult(intent, 1);

if ((ContextCompat
 
.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)||
        (ContextCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)) {
    //如果沒有授權，則請求授權
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA,Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
} else {
    //有授權，直接開啟攝像頭
//6.0 camera
/*Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    File file = new File("/mnt/sdcard", "camera.png");
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file)); // set the image file name
    startActivityForResult(intent, 1);*/
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (intent.resolveActivity(getPackageManager())!=null){
        File photoFile = null;
try {
            photoFile = createImageFile();//建立臨時圖片檔案，方法在下面
} catch (IOException e) {
            e.printStackTrace();
}
        if (photoFile != null) {
            //FileProvider 是一個特殊的 ContentProvider 的子類，
//它使用 content:// Uri 代替了 file:/// Uri. ，更便利而且安全的為另一個app分享檔案
Uri photoURI = FileProvider.getUriForFile(this,
"com.sat.android.fileprovider",
photoFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(intent, 1);
}
    }
}

String mCurrentPhotoPath;
private File createImageFile() throws IOException {
    // Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.CHINA).format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
//.getExternalFilesDir()方法可以獲取到 SDCard/Android/data/你的應用的包名/files/ 目錄，一般放一些長時間儲存的資料
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
/*File storageDir = new File(Environment.getExternalStorageDirectory(), "images");
    if (!storageDir.exists()) storageDir.mkdirs();*/
Log.d("TAH",storageDir.toString());
//建立臨時檔案,檔案字首不能少於三個字元,字尾如果為空預設未".tmp"
File image = File.createTempFile(
            imageFileName,  /* 字首 */
".jpg",         /* 字尾 */
storageDir      /* 資料夾 */
);
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}

<provider
android:authorities="com.sat.android.fileprovider" //與FileProvider.getUriForFile第二個引數相同

android:name="android.support.v4.content.FileProvider"

<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="my_images" path="Android/data/com.sat.a10_6_/files/Pictures" />
</paths>

File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);