<!DOCTYPE html>
<html>
<head>
<script src="js/jquery-3.2.1.js"></script>
<script lang="javascript">$.ready(function () {
$.post("https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=BTC,USD,EUR,GBP", function(data) {
alert(data)
})
}) </script>
</head>
<body>
</body>
</html>
这是为了从cryptocompare API中提取{“BTC”:0.0684,“USD”:294.38,“EUR”:251.24,“GBP”:227.87},然后发出警报,但它什么也没显示。我还检查了devtools,并且
中没有任何传出答案 0 :(得分:0)
我认为您正在寻找 <!DOCTYPE html>
<html>
<head>
<script src="js/jquery-3.2.1.js"></script>
<script lang="javascript">$(document).ready(function () {
$.get("https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=BTC,USD,EUR,GBP", function(data) {
alert(data)
})
}) </script>
</head>
<body>
</body>
</html>
而不是@Override
public void onClick (View v){
try {
if (ActivityCompat.checkSelfPermission(Activity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(Activity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, PICK_FROM_GALLERY);
} else {
Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, 1);
}
} catch (Exception e) {
e.printStackTrace();
}
}
这应该有用。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == RESULT_OK && null != data) {
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 picturePath = cursor.getString(columnIndex);
cursor.close();
ImageView imageView = (ImageView) findViewById(R.id.imgView);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults)
{
switch (requestCode) {
case 1:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, 1);
} else {
//Error message
}
break;
}
}
答案 1 :(得分:0)
使用
$.get()
OR
$(function() {
$.get("https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=BTC,USD,EUR,GBP", function(data) {
alert(data)
console.log(data)
})
});
没有任何内容可以发布,可能需要<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<textarea id="projectDescription" required [(ngModel)]="projectDescription" [formControl]="createNewForm.controls['projectDescription']" style="margin-bottom:-2%;width:50%;"></textarea>
&#13;
$("#projectDescription").val("Test value");
&#13;
答案 2 :(得分:0)
您的ready
语法不正确。此外,在这种情况下,您可以使用$.get
,尽管它可以正常工作。
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script lang="javascript">$(document).ready(function () {
$.get("https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=BTC,USD,EUR,GBP", function(data) {
alert(JSON.stringify(data))
})
}) </script>
</head>
<body>
</body>
</html>
答案 3 :(得分:0)
您想要的可能是$.get()
而不是$.post()
。
虽然$.post(url, data, handler)
通常用于POST(或$.get(url, handler)
用于GET),但最好使用.done()
和.fail()
:
$.post("https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=BTC,USD,EUR,GBP", {
"field1" : "value1",
"field2" : "value2"
}).done(function(data) {
alert('Success: ' + data);
}).fail(function(xhr, status, error) {
alert('Error: ' + error);
});
GET:
$.get("https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=BTC,USD,EUR,GBP").done(function(data) {
alert('Success: ' + data);
}).fail(function(xhr, status, error) {
alert('Error: ' + error);
});
另请注意,这应该在DOM准备就绪时完成(如果您需要将数据添加到某些HTML元素或类似的东西):
<script type="text/javascript">
$(document).ready(function() {
// Here
});
</script>