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feat(image-source): add saveToFileAsync, toBase64StringAsync & resizeAsync (#9404)

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This commit is contained in:
Osei Fortune
2021-08-11 10:28:06 -07:00
committed by Nathan Walker
parent 3aff057b99
commit b2f792324d
9 changed files with 371 additions and 3 deletions
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144
packages/ui-mobile-base/android/widgets/src/main/java/org/nativescript/widgets/Utils.java
View File

@@ -12,6 +12,7 @@ import android.net.Uri;
import android.os.Handler;
import android.os.Looper;
import android.os.ParcelFileDescriptor;
import android.util.Base64OutputStream;
import android.util.Log;
import android.util.Pair;
import android.view.View;
@@ -22,6 +23,8 @@ import androidx.exifinterface.media.ExifInterface;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.IOException;
@@ -72,7 +75,7 @@ public class Utils {
}
public interface AsyncImageCallback {
void onSuccess(Bitmap bitmap);
void onSuccess(Object bitmap);
void onError(Exception exception);
}
@@ -287,6 +290,145 @@ public class Utils {
});
}
static Bitmap.CompressFormat getTargetFormat(String format) {
switch (format) {
case "jpeg":
case "jpg":
return Bitmap.CompressFormat.JPEG;
default:
return Bitmap.CompressFormat.PNG;
}
}
public static void saveToFileAsync(final Bitmap bitmap, final String path, final String format, final int quality, final AsyncImageCallback callback) {
executors.execute(new Runnable() {
@Override
public void run() {
boolean isSuccess = false;
Exception exception = null;
if (bitmap != null) {
Bitmap.CompressFormat targetFormat = getTargetFormat(format);
try (BufferedOutputStream outputStream = new BufferedOutputStream(new java.io.FileOutputStream(path))) {
isSuccess = bitmap.compress(targetFormat, quality, outputStream);
} catch (Exception e) {
exception = e;
}
}
final Exception finalException = exception;
final boolean finalIsSuccess = isSuccess;
mainHandler.post(new Runnable() {
@Override
public void run() {
if (finalException != null) {
callback.onError(finalException);
} else {
callback.onSuccess(finalIsSuccess);
}
}
});
}
});
}
public static void toBase64StringAsync(final Bitmap bitmap, final String format, final int quality, final AsyncImageCallback callback) {
executors.execute(new Runnable() {
@Override
public void run() {
String result = null;
Exception exception = null;
if (bitmap != null) {
Bitmap.CompressFormat targetFormat = getTargetFormat(format);
try (
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
Base64OutputStream base64Stream = new Base64OutputStream(outputStream, android.util.Base64.NO_WRAP)
) {
bitmap.compress(targetFormat, quality, base64Stream);
result = outputStream.toString();
} catch (Exception e) {
exception = e;
}
}
final Exception finalException = exception;
final String finalResult = result;
mainHandler.post(new Runnable() {
@Override
public void run() {
if (finalException != null) {
callback.onError(finalException);
} else {
callback.onSuccess(finalResult);
}
}
});
}
});
}
static Pair<Integer, Integer> getScaledDimensions(float width, float height, float maxSize) {
if (height >= width) {
if (height <= maxSize) {
// if image already smaller than the required height
return new Pair<>((int) width, (int) height);
}
return new Pair<>(
Math.round((maxSize * width) / height)
, (int) height);
}
if (width <= maxSize) {
// if image already smaller than the required width
return new Pair<>((int) width, (int) height);
}
return new Pair<>((int) maxSize, Math.round((maxSize * height) / width));
}
public static void resizeAsync(final Bitmap bitmap, final float maxSize, final String options, final AsyncImageCallback callback) {
executors.execute(new Runnable() {
@Override
public void run() {
Bitmap result = null;
Exception exception = null;
if (bitmap != null) {
Pair<Integer, Integer> dim = getScaledDimensions(bitmap.getWidth(), bitmap.getHeight(), maxSize);
boolean filter = false;
if (options != null) {
try {
JSONObject json = new JSONObject(options);
filter = json.optBoolean("filter", false);
} catch (JSONException ignored) {
}
}
try {
result = android.graphics.Bitmap.createScaledBitmap(bitmap, dim.first, dim.second, filter);
} catch (Exception e) {
exception = e;
}
}
final Exception finalException = exception;
final Bitmap finalResult = result;
mainHandler.post(new Runnable() {
@Override
public void run() {
if (finalException != null) {
callback.onError(finalException);
} else {
callback.onSuccess(finalResult);
}
}
});
}
});
}
// public static void clearBoxShadow(View view) {
// if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.M) {
// return;