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64 lines (49 loc) · 1.87 KB
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import appModule = require("application");
export function fromResource(name: string) {
var androidApp = appModule.android;
var res = androidApp.context.getResources();
if (res) {
var identifier: number = res.getIdentifier(name, 'drawable', androidApp.packageName);
if (0 < identifier) {
return android.graphics.BitmapFactory.decodeResource(res, identifier);
}
}
return null;
}
export function fromFile(path: string) {
return android.graphics.BitmapFactory.decodeFile(path, null);
}
export function fromData(data: any) {
return android.graphics.BitmapFactory.decodeStream(data);
}
export function saveToFile(instance: android.graphics.Bitmap, path: string, format: number, quality = 100): boolean {
if (!instance) {
return false;
}
var targetFormat = getTargetFromat(format);
// TODO add exception handling
var outputStream = new java.io.BufferedOutputStream(new java.io.FileOutputStream(path));
var res = instance.compress(targetFormat, quality, outputStream);
outputStream.close();
return res;
}
export function toBase64String(instance: android.graphics.Bitmap, format: number, quality = 100): string {
if (!instance) {
return null;;
}
var targetFormat = getTargetFromat(format);
var outputStream = new java.io.ByteArrayOutputStream();
var base64Stream = new android.util.Base64OutputStream(outputStream, android.util.Base64.NO_WRAP);
instance.compress(targetFormat, quality, base64Stream);
base64Stream.close();
outputStream.close();
return outputStream.toString();
}
function getTargetFromat(format: number): android.graphics.Bitmap.CompressFormat {
switch (format) {
case 1: // JPEG
return android.graphics.Bitmap.CompressFormat.JPEG;
default:
return android.graphics.Bitmap.CompressFormat.PNG;
}
}