1、拍照时先传Uri
/**
* 创建图片地址uri,用于保存拍照后的照片 Android 10以后使用这种方法
*/
private Uri createImageUri() {
String status = Environment.getExternalStorageState();
// 判断是否有SD卡,优先使用SD卡存储,当没有SD卡时使用手机存储
if (status.equals(Environment.MEDIA_MOUNTED)) {
return getActivity().getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new ContentValues());
} else {
return getActivity().getContentResolver().insert(MediaStore.Images.Media.INTERNAL_CONTENT_URI, new ContentValues());
}
}
2、拍完后 将原有Uri写入到沙盒里 最终转成File
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider. android 10
*/
public static File uriToFileApiQ(Uri uri, Context context) {
File file = null;
if(uri == null) return file;
//android10以上转换
if (uri.getScheme().equals(ContentResolver.SCHEME_FILE)) {
file = new File(uri.getPath());
} else if (uri.getScheme().equals(ContentResolver.SCHEME_CONTENT)) {
//把文件复制到沙盒目录
ContentResolver contentResolver = context.getContentResolver();
String displayName = System.currentTimeMillis()+ Math.round((Math.random() + 1) * 1000)
+"."+ MimeTypeMap.getSingleton().getExtensionFromMimeType(contentResolver.getType(uri));
// 注释掉的方法可以获取到原文件的文件名，但是比较耗时
// Cursor cursor = contentResolver.query(uri, null, null, null, null);
// if (cursor.moveToFirst()) {
// String displayName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));}
try {
InputStream is = contentResolver.openInputStream(uri);
File cache = new File(context.getCacheDir().getAbsolutePath(), displayName);
FileOutputStream fos = new FileOutputStream(cache);
copyFile(is, fos);
file = cache;
fos.close();
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return file;
}
public static void copyFile(InputStream is, FileOutputStream fos) {
try{
byte[] buffer = new byte[1024];
int length;
while ((length = is.read(buffer)) > 0) {
fos.write(buffer, 0, length);
}
System.out.println("File successfully copied.");
} catch(IOException e){
System.out.println("Handle the exception");
e.printStackTrace();
}
}
7.0以下创建路径方法
public static File createTmpFile(Context context) throws IOException{
File dir = null;
if(TextUtils.equals(Environment.getExternalStorageState(), Environment.MEDIA_MOUNTED)) {
dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
if (!dir.exists()) {
dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM + "/Camera");
if (!dir.exists()) {
dir = getCacheDirectory(context, true);
}
}
}else{
dir = getCacheDirectory(context, true);
}
return File.createTempFile(JPEG_FILE_PREFIX, JPEG_FILE_SUFFIX, dir);
}
private static final String EXTERNAL_STORAGE_PERMISSION = "android.permission.WRITE_EXTERNAL_STORAGE";
/**
* Returns application cache directory. Cache directory will be created on SD card
* ("/Android/data/[app_package_name]/cache") if card is mounted and app has appropriate permission. Else -
* Android defines cache directory on device's file system.
*
* @param context Application context
* @return Cache {@link File directory}.
* NOTE: Can be null in some unpredictable cases (if SD card is unmounted and
* {@link android.content.Context#getCacheDir() Context.getCacheDir()} returns null).
*/
public static File getCacheDirectory(Context context) {
return getCacheDirectory(context, true);
}
/**
* Returns application cache directory. Cache directory will be created on SD card
* ("/Android/data/[app_package_name]/cache") (if card is mounted and app has appropriate permission) or
* on device's file system depending incoming parameters.
*
* @param context Application context
* @param preferExternal Whether prefer external location for cache
* @return Cache {@link File directory}.
* NOTE: Can be null in some unpredictable cases (if SD card is unmounted and
* {@link android.content.Context#getCacheDir() Context.getCacheDir()} returns null).
*/
public static File getCacheDirectory(Context context, boolean preferExternal) {
File appCacheDir = null;
String externalStorageState;
try {
externalStorageState = Environment.getExternalStorageState();
} catch (NullPointerException e) { // (sh)it happens (Issue #660)
externalStorageState = "";
} catch (IncompatibleClassChangeError e) { // (sh)it happens too (Issue #989)
externalStorageState = "";
}
if (preferExternal && MEDIA_MOUNTED.equals(externalStorageState) && hasExternalStoragePermission(context)) {
appCacheDir = getExternalCacheDir(context);
}
if (appCacheDir == null) {
appCacheDir = context.getCacheDir();
}
if (appCacheDir == null) {
String cacheDirPath = "/data/data/" + context.getPackageName() + "/cache/";
appCacheDir = new File(cacheDirPath);
}
return appCacheDir;
}
/**
* Returns individual application cache directory (for only image caching from ImageLoader). Cache directory will be
* created on SD card ("/Android/data/[app_package_name]/cache/uil-images") if card is mounted and app has
* appropriate permission. Else - Android defines cache directory on device's file system.
*
* @param context Application context
* @param cacheDir Cache directory path (e.g.: "AppCacheDir", "AppDir/cache/images")
* @return Cache {@link File directory}
*/
public static File getIndividualCacheDirectory(Context context, String cacheDir) {
File appCacheDir = getCacheDirectory(context);
File individualCacheDir = new File(appCacheDir, cacheDir);
if (!individualCacheDir.exists()) {
if (!individualCacheDir.mkdir()) {
individualCacheDir = appCacheDir;
}
}
return individualCacheDir;
}
private static File getExternalCacheDir(Context context) {
File dataDir = new File(new File(Environment.getExternalStorageDirectory(), "Android"), "data");
File appCacheDir = new File(new File(dataDir, context.getPackageName()), "cache");
if (!appCacheDir.exists()) {
if (!appCacheDir.mkdirs()) {
return null;
}
try {
new File(appCacheDir, ".nomedia").createNewFile();
} catch (IOException e) {
}
}
return appCacheDir;
}
private static boolean hasExternalStoragePermission(Context context) {
int perm = context.checkCallingOrSelfPermission(EXTERNAL_STORAGE_PERMISSION);
return perm == PackageManager.PERMISSION_GRANTED;
}
//图片的Uri
imageUri= Uri.fromFile(mTmpFile);