每次我在 Android 中从图库中拍摄图像时，图像都不会导入。
Intent i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, LOAD_IMAGE_RESULTS);
super.onActivityResult(requestCode, resultCode, data);
BitmapFactory.Options BitmapFactoryOptionsbfo = new BitmapFactory.Options();
BitmapFactoryOptionsbfo.inPreferredConfig = Bitmap.Config.RGB_565;
if (requestCode == LOAD_IMAGE_RESULTS && resultCode == RESULT_OK
&& data != null) {
imgUri = data.getData();
// Let's read picked image path using content resolver
String[] filePath = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(imgUri, filePath, null,
null, null);
cursor.moveToFirst();
String imagePath = cursor.getString(cursor
.getColumnIndex(filePath[0]));
bmp = BitmapFactory.decodeFile(imagePath);
cursor.close();
}如何从图库获取图像，支持 API>=19 和 API<19 两者...
最佳答案
此代码将解决 SDK < API11、SDK >= 11 && SDK < 19 和 SDK > 19 的问题
全局声明
public final int GALLERY_PHOTO = 2;
Bitmap newbitmap;
private Uri fileUri;
使用此方法启动图像选择器
public void callGallery() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"),
GALLERY_PHOTO);
}
在默认情况下使用此条件@Overide onActivityResult(int requestCode, int resultCode, Intent data)
if (requestCode == GALLERY_PHOTO) {
if (resultCode == RESULT_OK) {
// SDK < API11
if (Build.VERSION.SDK_INT < 11) {
try {
realPath = RealPathUtil.getRealPathFromURI_BelowAPI11(
Yourclassname.this,
data.getData());
setTextViews(Build.VERSION.SDK_INT, data.getData()
.getPath(), realPath);
} catch (Exception e) {
e.printStackTrace();
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver()
.query(selectedImage, filePathColumn, null,
null, null);
cursor.moveToFirst();
int columnIndex = cursor
.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
newbitmap = BitmapFactory.decodeFile(filePath);
imageview.setImageBitmap(newbitmap);
}
}
// SDK >= 11 && SDK < 19
else if (Build.VERSION.SDK_INT < 19) {
try {
realPath = RealPathUtil.getRealPathFromURI_API11to18(
yourclassname.this,
data.getData());
setTextViews(Build.VERSION.SDK_INT, data.getData()
.getPath(), realPath);
} catch (Exception e1) {
e1.printStackTrace();
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver()
.query(selectedImage, filePathColumn, null,
null, null);
cursor.moveToFirst();
int columnIndex = cursor
.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
newbitmap = BitmapFactory.decodeFile(filePath);
imageview.setImageBitmap(newbitmap);
}
}
else {
try {
realPath = RealPathUtil.getRealPathFromURI_API19(
yourclassname.this,
data.getData());
setTextViews(Build.VERSION.SDK_INT, data.getData()
.getPath(), realPath);
} catch (Exception e) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver()
.query(selectedImage, filePathColumn, null,
null, null);
cursor.moveToFirst();
int columnIndex = cursor
.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
newbitmap = BitmapFactory.decodeFile(filePath);
imageview.setImageBitmap(newbitmap);
}
}
// end
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(getApplicationContext(), "Canceled",
Toast.LENGTH_SHORT).show();
} else {
// failed to capture image
Toast.makeText(getApplicationContext(),
"Oops!! Failed to pick Image", Toast.LENGTH_SHORT).show();
}
}
将此方法包含在您的类中
private void setTextViews(int sdk, String uriPath, String realPath) {
Uri uriFromPath = Uri.fromFile(new File(realPath));
fileUri = uriFromPath;
try {
newbitmap = BitmapFactory.decodeStream(getContentResolver()
.openInputStream(fileUri));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
imageview.setImageBitmap(newbitmap);
Log.d("Status", "Build.VERSION.SDK_INT:" + sdk);
Log.d("Status", "URI Path:" + fileUri);
Log.d("Status", "Real Path: " + realPath);
}
在RealPathUtil.class中创建此辅助方法
public class RealPathUtil {
@SuppressLint("NewApi")
public static String getRealPathFromURI_API19(Context context, Uri uri){
String filePath = "";
String wholeID = DocumentsContract.getDocumentId(uri);
// Split at colon, use second item in the array
String id = wholeID.split(":")[1];
String[] column = { MediaStore.Images.Media.DATA };
// where id is equal to
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
column, sel, new String[]{ id }, null);
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
filePath = cursor.getString(columnIndex);
}
cursor.close();
return filePath;
}
@SuppressLint("NewApi")
public static String getRealPathFromURI_API11to18(Context context, Uri contentUri) {
String[] proj = { MediaStore.Images.Media.DATA };
String result = null;
CursorLoader cursorLoader = new CursorLoader(
context,
contentUri, proj, null, null, null);
Cursor cursor = cursorLoader.loadInBackground();
if(cursor != null){
int column_index =
cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
result = cursor.getString(column_index);
}
return result;
}
public static String getRealPathFromURI_BelowAPI11(Context context, Uri contentUri){
String[] proj = { MediaStore.Images.Media.DATA };
Cursor 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);
}
}
希望这能解决您的问题。
关于java - 如何从支持 API>=19 和 API<19 的图库中获取图像？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28342678/