java从安卓上的createMime值数据读取NFC
我用CreateMime将标记写入NFC成功创建。我们如何从NFC createmime值读取和获取数据字符串以显示textview 安卓布局?请帮助任何人
@Override
protected void onNewIntent(Intent intent) {
// Tag writing mode
if (mWriteMode && NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) {
Tag detectedTag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
NdefRecord name = NdefRecord.createMime( ((TextView)findViewById(R.id.tvname)).getText().toString(), ((TextView)findViewById(R.id.name)).getText().toString().getBytes());
NdefRecord phone = NdefRecord.createMime( ((TextView)findViewById(R.id.tvphone)).getText().toString(), ((TextView)findViewById(R.id.phone)).getText().toString().getBytes());
NdefMessage message = new NdefMessage(new NdefRecord[] { name,phone });
if (writeTag(message, detectedTag)) {
Toast.makeText(this, "Success: Wrote placeid to nfc tag", Toast.LENGTH_LONG)
.show();
}
}
}
将NdefMessage写入NFC标记
public boolean writeTag(NdefMessage message, Tag tag) {
int size = message.toByteArray().length;
try {
Ndef ndef = Ndef.get(tag);
if (ndef != null) {
ndef.connect();
if (!ndef.isWritable()) {
Toast.makeText(getApplicationContext(),
"Error: tag not writable",
Toast.LENGTH_SHORT).show();
return false;
}
if (ndef.getMaxSize() < size) {
Toast.makeText(getApplicationContext(),
"Error: tag too small",
Toast.LENGTH_SHORT).show();
return false;
}
ndef.writeNdefMessage(message);
return true;
} else {
NdefFormatable format = NdefFormatable.get(tag);
if (format != null) {
try {
format.connect();
format.format(message);
return true;
} catch (IOException e) {
return false;
}
} else {
return false;
}
}
} catch (Exception e) {
return false;
}
}
# 1 楼答案
在onCreate中,编写以下内容:
然后调用read方法