How to use the expo-sharing.shareAsync function in expo-sharing
To help you get started, we’ve selected a few expo-sharing examples, based on popular ways it is used in public projects.
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expo / expo / apps / native-component-list / src / screens / SharingScreen.tsx View on Github 
_shareLocalImage = async () => {
const asset = Asset.fromModule(image);
await asset.downloadAsync();
const tmpFile = FileSystem.cacheDirectory + 'chapeau.png';
try {
// sharing only works with `file://` urls on Android so we need to copy it out of assets
await FileSystem.copyAsync({ from: asset.localUri!, to: tmpFile });
await Sharing.shareAsync(tmpFile, {
dialogTitle: 'Is it a snake or a hat?',
});
} catch (e) {
console.error(e);
}
}
