Android--超フルFile,Bitmap,Drawable,Uri,FilePath,byte[]間の変換方法
27164 ワード
1.File回転Bitmap 2.Bitmap回転File 3.Uri回転File 4.File回転Uri 5.url回転Bitmap(ネットワーク画像をロード)6.Uri回転Bitmap 7.Path回転Uri 8.Uri回転Path 9.byte[]回転Bitmap 10.Bitmap回転byte[11]11.BitmapはDrawable 12を回転する.Drawable回転Bitmap
1.ファイル(path)転送Bitmap
または
圧縮してから回転するか
2.Bitmapファイルの転送
3.Uri回転ファイル
4.File回転Uri
5.urlパス回転Bitmap(ネットワーク画像のロード)
6.Uri回転Bitmap
または
7.Path回転Uri
FilePath回転FileUri
FilePath回転MediaUri
8.Uri回転Path
1つ目(比較すると2つがカバーされていないようです)
2番目(1行目のコードから抜粋)
3つ目(ネットワークから)
9.byte[]回転bitmap
10.bitmap回転byte[]
11.bitmap回転drawable
12.drawable回転bitmap
1.ファイル(path)転送Bitmap
File file = new File(filePath);
Uri uri = Uri.fromFile(file);
Bitmap bitmap = MediaStore.Images.Media.getBitmap(mContext.getContentResolver(), uri);または
Bitmap loadbitmap = BitmapFactory.decodeFile(file);
/*
BitmapFactory.decodeStream(InputStream inputStream);//stream bitmap
BitmapFactory.decodeResource();//resource bitmap
BitmapFactory.decodeByteArray();//bytes bitmap
BitmapFactory.decodeFileDescriptor();//fileDescriptor bitmap
...
*/
圧縮してから回転するか
Bitmap loadbitmap = BitmapFactory.decodeFile(imagePath, getBitmapOption(2));
private BitmapFactory.Options getBitmapOption(int inSampleSize)
{
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
options.inSampleSize = inSampleSize;
return options;
}
2.Bitmapファイルの転送
public void saveBitmapFile(Bitmap bitmap) {
File file = new File(filePath);//
try {
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bos);
bos.flush();
bos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
3.Uri回転ファイル
/**
* uri File
*/
public File uriTurnFile(Uri uri) {
return new File(uri.getPath());
}4.File回転Uri
/**
* File Uri
*/
public Uri fileTurnUri(File file) {
return Uri.fromFile(file);
}5.urlパス回転Bitmap(ネットワーク画像のロード)
/**
* url bitmap
*
* @param urlpath
* @return
*/
public Bitmap getBitmap(String urlpath) {
Bitmap map = null;
try {
URL url = new URL(urlpath);
URLConnection conn = url.openConnection();
conn.connect();
InputStream in;
in = conn.getInputStream();
map = BitmapFactory.decodeStream(in);
} catch (IOException e) {
e.printStackTrace();
}
return map;
}6.Uri回転Bitmap
// ，
InputStream stream = getContentResolver().openInputStream(uri);
Bitmap bitmap = BitmapFactory.decodeStream(stream, null, options);
stream.close();または
Bitmap bitmap = MediaStore.Images.Media.getBitmap(mContext.getContentResolver(), uri);
7.Path回転Uri
FilePath回転FileUri
File f = new File(filePath);
Uri uri = Uri.fromFile(f);FilePath回転MediaUri
public static Uri getMediaUriFromPath(Context context, String path) {
Uri mediaUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
Cursor cursor = context.getContentResolver().query(mediaUri, null,
MediaStore.Images.Media.DISPLAY_NAME + "= ?",
new String[] {path.substring(path.lastIndexOf("/") + 1)},
null);
Uri uri = null;
if(cursor.moveToFirst()) {
uri = ContentUris.withAppendedId(mediaUri,
cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media._ID)));
}
cursor.close();
return uri;
}8.Uri回転Path
1つ目(比較すると2つがカバーされていないようです)
/**
* 4.4
* uri path
*/
public String getRealPathFromUri(Context context, Uri contentUri) {
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} finally {
if (cursor != null) {
cursor.close();
}
}
}
/**
* android 4.4 uri
*/
public String getRealFilePath(Uri uri) {
final String scheme = uri.getScheme();
String data = null;
if (scheme == null)
data = uri.getPath();
else if (ContentResolver.SCHEME_FILE.equals(scheme)) {
data = uri.getPath();
} else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) {
Cursor cursor = mContext.getContentResolver().query(uri, new String[]{MediaStore.Images.ImageColumns.DATA}, null, null, null);
if (null != cursor) {
if (cursor.moveToFirst()) {
int index = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
if (index > -1) {
data = cursor.getString(index);
}
}
cursor.close();
}
}
return data;
}2番目(1行目のコードから抜粋)
private void handleImageBeforeKitKat(Uri uri) {
String imagePath = getImagePath(uri, null);
}
@TargetApi(Build.VERSION_CODES.KITKAT)
private void handleImageOnKitKat(Uri uri) {
String imagePath = null;
if (DocumentsContract.isDocumentUri(this, uri)) {
// Document Uri， document id
String docId = DocumentsContract.getDocumentId(uri);
if ("com.android.providers.media.documents".equals(uri.getAuthority())) {
String id = docId.split(":")[1];// id
String selection = MediaStore.Images.Media._ID + "=" + id;
imagePath = getImagePath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection);
} else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(docId));
imagePath = getImagePath(contentUri, null);
}
} else if ("content".equalsIgnoreCase(uri.getScheme())) {
// content uri，
imagePath = getImagePath(uri, null);
} else if ("file".equalsIgnoreCase(uri.getScheme())) {
// file Uri,
imagePath = uri.getPath();
}
}
private String getImagePath(Uri uri, String selection) {
String path = null;
// Uri selection
Cursor cursor = getContentResolver().query(uri, null, selection, null, null);
if (cursor != null) {
if (cursor.moveToFirst()) {
path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
}
cursor.close();
}
return path;
}
( )3つ目(ネットワークから)
/**
* Uri ， Android4.4 Uri
*
* @param context
* @param imageUri
*/
public static String getImageAbsolutePath(Context context, Uri imageUri) {
if (context == null || imageUri == null)
return null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, imageUri)) {
if (isExternalStorageDocument(imageUri)) {
String docId = DocumentsContract.getDocumentId(imageUri);
String[] split = docId.split(":");
String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
} else if (isDownloadsDocument(imageUri)) {
String id = DocumentsContract.getDocumentId(imageUri);
Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
} else if (isMediaDocument(imageUri)) {
String docId = DocumentsContract.getDocumentId(imageUri);
String[] split = docId.split(":");
String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
String selection = MediaStore.Images.Media._ID + "=?";
String[] selectionArgs = new String[]{split[1]};
return getDataColumn(context, contentUri, selection, selectionArgs);
}
} // MediaStore (and general)
else if ("content".equalsIgnoreCase(imageUri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(imageUri))
return imageUri.getLastPathSegment();
return getDataColumn(context, imageUri, null, null);
}
// File
else if ("file".equalsIgnoreCase(imageUri.getScheme())) {
return imageUri.getPath();
}
return null;
}
public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
Cursor cursor = null;
String column = MediaStore.Images.Media.DATA;
String[] projection = {column};
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
if (cursor != null && cursor.moveToFirst()) {
int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
/**
* Try to return the absolute file path from the given Uri
* 4.4
* @param context
* @param uri
* @return the file path or null
*/
public static String getPath(final Context context, final Uri uri) {
if (null == uri) return null;
final String scheme = uri.getScheme();
String data = null;
if (scheme == null)
data = uri.getPath();
else if (ContentResolver.SCHEME_FILE.equals(scheme)) {
data = uri.getPath();
} else if (ContentResolver.SCHEME_CONTENT.equals(scheme)) {
Cursor cursor = context.getContentResolver().query(uri, new String[]{MediaStore.Images.ImageColumns.DATA}, null, null, null);
if (null != cursor) {
if (cursor.moveToFirst()) {
int index = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
if (index == -1) {
index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
}
if (index > -1) {
data = cursor.getString(index);
}
}
cursor.close();
}
}
return data;
}9.byte[]回転bitmap
public Bitmap Bytes2Bimap(byte[] b) {
if (b.length != 0) {
return BitmapFactory.decodeByteArray(b, 0, b.length);
} else {
return null;
}
}10.bitmap回転byte[]
public byte[] Bitmap2Bytes(Bitmap bm) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
return baos.toByteArray();
}11.bitmap回転drawable
BitmapDrawable bd= new BitmapDrawable(bitmap);
BitmapDrawable bd= new BitmapDrawable(getResource(), bitmap); 12.drawable回転bitmap
public static Bitmap drawableToBitmap (Drawable drawable) {
Bitmap bitmap = null;
if (drawable instanceof BitmapDrawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
if(bitmapDrawable.getBitmap() != null) {
return bitmapDrawable.getBitmap();
}
}
// drawable ,Bitmap.createBitmap
Bitmap.Config config = drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;
if(drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
} else {
bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
}
// drawable
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}