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我有问题将TextView更改为ListView。最初，该应用程序有一个按钮，单击时，将测试运行到蓝牙设备，并在textview中显示结果。我修改了应用程序，使其包含两个包含最后文本结果的文本视图和一个单独的xml文件（与viewflipper连接），以转到包含所有测试结果的第二个文本视图，直到用户通过单击按钮清除文本视图。我注视着this example一起，并检查了我的代码中的一个ArrayAdapter部分被侵入，然后它似乎是根据developer's guide需要什么，但我仍然得到了自己的错误：可以ListView的主机TextView项目也显示在一个单独的TextView
无法解析构造“ArrayAdapter（COM .example.android.stardustscanner.ScannerFragment，int，int，java.lang.String）'
为什么我得到这个错误？
我正在进行所有更改的我的.java文件非常长，并且包含很多与此问题无关并且不适合在问题框中的问题，因此我只会尝试包括相关部分。该错误是朝着这一行底部： ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, R.layout.fragment_bluetooth_scanner, R.id.textView, saveData);
ScannerFragment.java
public class ScannerFragment extends Fragment implements LocationListener {
ListView mListView;
//page switching things KG 8/24/17
private ViewFlipper mViewFlipper;
private float lastX;
private Button mViewLog;
private Button mReturnFlipper;
private TextView mShowData;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.flipper_holder, container, false);//kg 8/24/17
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
SP = PreferenceManager.getDefaultSharedPreferences(getContext());
mViewFlipper = (ViewFlipper) view.findViewById(R.id.viewFlip); //KG 8/24/17
mViewLog = (Button) view.findViewById(R.id.viewLog); //kg 8/24/17
mReturnFlipper = (Button) view.findViewById(R.id.flipperReturn); //kg 8/24/17
mShowData = (TextView) view.findViewById(R.id.textView) ; //kg 8/25/2017
mShowData.setText(readFromFile()); // kg 8/25/2017
mPowerOffButton = (Button) view.findViewById(R.id.button_poweroff);
mDisconnectButton = (Button) view.findViewById(R.id.button_disconnect);
mConnectButton = (Button) view.findViewById(R.id.button_connect);
mPresence = (Button) view.findViewById(R.id.button_present);
mBattery = (ProgressBar) view.findViewById(R.id.progressBar);
mBlinkConnect = (Button) view.findViewById(R.id.button_connectionblink);
mBlinkData = (Button) view.findViewById(R.id.button_communication);
mClearLog = (Button) view.findViewById(R.id.button_clear_log);
mDeviceName = (Button) view.findViewById(R.id.button_devicename);
mDeviceSN = (Button) view.findViewById(R.id.button_devicesn);
mBatteryPerc = (TextView) view.findViewById(R.id.label_batterypct);
mListView = (ListView) view.findViewById(R.id.scanLogView); //kg 8/28/17
// mReadingLog = (TextView) view.findViewById(R.id.scanLogView);
mReadingLog.setMovementMethod(new ScrollingMovementMethod());
mReadingLog.setText(readFromFile());
telephonyManager = (TelephonyManager)getContext().getSystemService(Context.TELEPHONY_SERVICE);
initLocationService(this.getContext());
final ActionBar actionBar = getActivity().getActionBar();
if (null == actionBar) {
return;
}
final Drawable D = getResources().getDrawable(R.drawable.stardust2);
actionBar.setBackgroundDrawable(D);
actionBar.setTitle("");
//KG 8/24/17
mViewLog.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
mViewFlipper.showNext();
}
});
mReturnFlipper.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
mViewFlipper.showPrevious();
}
});
}
private void setupScanner() {
Log.d(TAG, "setupScanner()");
// Initialize the send button with a listener that for click events
mPowerOffButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(isIris) {
publishMessage(Constants.COMMAND_POWEROFF_IRIS);
} else {
publishMessage(Constants.COMMAND_POWEROFF);
}
mScannerService.stop();
}
});
// Initialize the send button with a listener that for click events
mDisconnectButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Send a message using content of the edit text widget
publishMessage(Constants.COMMAND_DISCONNECT);
mScannerService.stop();
}
});
// Initialize the send button with a listener that for click events
mConnectButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Send a message using content of the edit text widget
publishMessage(Constants.COMMAND_ON_CONNECT);
}
});
mClearLog.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Send a message using content of the edit text widget
mReadingLog.setText("");
if(SP.getBoolean("writeToFile", true)) {
writeToFile("", "", false);
}
}
});
// Initialize the ScannerService to perform bluetooth connections
mScannerService = new ScannerService(getActivity(), mHandler);
}
private TextView.OnEditorActionListener mWriteListener
= new TextView.OnEditorActionListener() {
public boolean onEditorAction(TextView view, int actionId, KeyEvent event) {
// If the action is a key-up event on the return key, send the message
if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_UP) {
String message = view.getText().toString();
publishMessage(message);
}
return true;
}
};
private final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
FragmentActivity activity = getActivity();
switch (msg.what) {
case Constants.MESSAGE_STATE_CHANGE:
switch (msg.arg1) {
case ScannerService.STATE_CONNECTED:
setStatus(mConnectedDeviceName);
if(mConnectedDeviceName.substring(0, 4).toLowerCase().equals("iris") || mConnectedDeviceName.substring(0, 8).toLowerCase().equals("stardust")) {
isIris = true;
mPresence.setClickable(true);
mPresence.setText("Click to detect taggant");
mPresence.setBackgroundColor(Color.parseColor("#0061ff"));
mPresence.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
readoutStarted = true;
publishMessage(Constants.COMMAND_RUN_IRIS);
}
});
mPowerOffButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
publishMessage(Constants.COMMAND_POWEROFF_IRIS);
mScannerService.stop();
}
});
} else {
isIris = false;
}
if(!isIris) {
mPresence.setClickable(false);
mPresence.setText("NO TAGGANT DETECTED");
mPresence.setBackgroundColor(Color.parseColor("#ffc4ab"));
publishMessage(Constants.COMMAND_ON_CONNECT);
timer = new Timer();
timerStarted = true;
timer.scheduleAtFixedRate(new TimerTask() {
synchronized public void run() {
publishMessage(Constants.COMMAND_READDATA);
}
}, 1000, 1000);
} else {
if(timerStarted) {
timer.cancel();
timer.purge();
timerStarted = false;
}
}
mBlinkConnect.setBackgroundColor(Color.parseColor("#11D901"));
break;
case ScannerService.STATE_CONNECTING:
setStatus("C");
break;
case ScannerService.STATE_LISTEN:
case ScannerService.STATE_NONE:
mBlinkConnect.setBackgroundColor(Color.parseColor("#ff2b0f"));
mBlinkData.setBackgroundColor(Color.parseColor("#CCCCCC"));
if(timerStarted) {
timer.cancel();
timer.purge();
timerStarted = false;
}
setStatus("D");
break;
}
break;
case Constants.MESSAGE_WRITE:
mBlinkData.setBackgroundColor(Color.parseColor("#CCCCCC"));
break;
case Constants.MESSAGE_READ:
mBlinkData.setBackgroundColor(Color.parseColor("#0091FA"));
String readMessage = (String)msg.obj;
if(isIris) {
readIris(readMessage);
} else {
readNormal(readMessage);
}
break;
case Constants.MESSAGE_DEVICE_NAME:
// save the connected device's name
mConnectedDeviceName = msg.getData().getString(Constants.DEVICE_NAME);
if (null != activity) {
Toast.makeText(activity, "Connected to "
+ mConnectedDeviceName, Toast.LENGTH_SHORT).show();
}
break;
case Constants.MESSAGE_TOAST:
if (null != activity) {
Toast.makeText(activity, msg.getData().getString(Constants.TOAST),
Toast.LENGTH_SHORT).show();
}
break;
}
}
};
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_CONNECT_DEVICE_SECURE:
// When DeviceListActivity returns with a device to connect
if (resultCode == Activity.RESULT_OK) {
connectDevice(data, true);
}
break;
case REQUEST_CONNECT_DEVICE_INSECURE:
// When DeviceListActivity returns with a device to connect
if (resultCode == Activity.RESULT_OK) {
connectDevice(data, false);
}
break;
case REQUEST_ENABLE_BT:
// When the request to enable Bluetooth returns
if (resultCode == Activity.RESULT_OK) {
// Bluetooth is now enabled, so set up a session
setupScanner();
} else {
// User did not enable Bluetooth or an error occurred
Log.d(TAG, "BT not enabled");
Toast.makeText(getActivity(), R.string.bt_not_enabled_leaving,
Toast.LENGTH_SHORT).show();
getActivity().finish();
}
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.secure_connect_scan: {
// Launch the DeviceListActivity to see devices and do scan
Intent serverIntent = new Intent(getActivity(), DeviceListActivity.class);
startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_SECURE);
return true;
}
/*case R.id.insecure_connect_scan: {
// Launch the DeviceListActivity to see devices and do scan
Intent serverIntent = new Intent(getActivity(), DeviceListActivity.class);
startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_INSECURE);
return true;
}*/
case R.id.settings_button: {
Intent serverIntent = new Intent(getActivity(), SettingsActivity.class);
startActivityForResult(serverIntent, REQUEST_SHOW_SETTINGS);
return true;
}
}
return false;
}
/**
*
* @param data String
* @param append boolean
*/
private void writeToFile(String data, String uploadData, boolean append) {
String root = Environment
.getExternalStorageDirectory().toString();
File myDir = new File(root);
String fname = "starDust.txt";
String fname2 = "starDust.csv";
File file = new File (myDir, fname);
File file2 = new File (myDir, fname2);
//if (file.exists()) file.delete();
try {
FileOutputStream out = new FileOutputStream(file, append);
out.write(data.getBytes(), 0, data.getBytes().length);
out.flush();
out.close();
FileOutputStream out2 = new FileOutputStream(file2, append);
out2.write(uploadData.getBytes(), 0, uploadData.getBytes().length);
out2.flush();
out2.close();
if(mConnectedDeviceName != null) {
Log.d(TAG, "Connecting " + SP.getString("server_ip", "") + SP.getString("server_username", "") + SP.getString("server_password", ""));
new FTPUploadTask().execute(mConnectedDeviceName, SP.getString("server_ip", ""), SP.getString("server_username", "") , SP.getString("server_password", ""));
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
*
*/
private String readFromFile() {
String root = Environment
.getExternalStorageDirectory().toString();
File myDir = new File(root);
String fname = "starDust.txt";
File file = new File (myDir, fname);
StringBuilder text = new StringBuilder();
if (file.exists()) {
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
text.insert(0, line + System.getProperty("line.separator"));
}
br.close();
} catch (Exception e) {
}
}
return text.toString();
}
private void readNormal(String readMessage) {
String parsedData[];
if(readMessage.contains(";")) {
if(readMessage.equals(";")) {
parsedData = bufferedMessage.trim().split(",");
bufferedMessage = "";
} else {
String partialMessage[] = readMessage.split(";");
bufferedMessage += partialMessage[0];
parsedData = bufferedMessage.trim().split(",");
if (partialMessage.length > 1) {
bufferedMessage = partialMessage[1];
} else {
bufferedMessage = "";
}
}
} else {
bufferedMessage += readMessage.trim();
return;
}
if(parsedData.length == RESPONSE_SIZE && parsedData[0].equals("U")) {
if(parsedData[1].matches("[-+]?\\d*\\.?\\d+")) {
if(Integer.parseInt(parsedData[1]) > maxU1 || hitTrigger) {
maxU1 = Integer.parseInt(parsedData[1]);
}
}
if(parsedData[2].matches("[-+]?\\d*\\.?\\d+")) {
if(Integer.parseInt(parsedData[2]) > maxU2 || hitTrigger) {
maxU2 = Integer.parseInt(parsedData[2]);
}
}
if(parsedData[3].matches("[-+]?\\d*\\.?\\d+")) {
if(Integer.parseInt(parsedData[3]) > maxU3 || hitTrigger) {
maxU3 = Integer.parseInt(parsedData[3]);
}
}
double u1val = Double.parseDouble(parsedData[1]);
double u2val = Double.parseDouble(parsedData[2]);
double u1u2div = 0;
if(u2val > 0) {
u1u2div = ((u1val/u2val) * KFactor);
}
if(parsedData[4].matches("[-+]?\\d*\\.?\\d+")) {
mBatteryPerc.setText(parsedData[4] + "%");
mBattery.setProgress(Integer.parseInt(parsedData[4]));
}
}
taggantType = 0;
if(maxU1 > Integer.parseInt(SP.getString("maxThreshold", Integer.toString(MAX_TRIGGER)))) {
taggantType += 4;
} else {
taggantType += 0;
}
if(maxU2 > Integer.parseInt(SP.getString("maxThreshold", Integer.toString(MAX_TRIGGER)))) {
taggantType += 2;
} else {
taggantType += 0;
}
if(maxU3 > Integer.parseInt(SP.getString("maxThreshold", Integer.toString(MAX_TRIGGER)))) {
taggantType += 1;
} else {
taggantType += 0;
}
Log.d(TAG, Integer.toString(taggantType));
Log.d(TAG, Boolean.toString(hitTrigger));
Log.d(TAG, bufferedMessage);
// Check if hit threshold, if so hitTrigger is enabled.
if(taggantType > 0) {
savedTaggantType = taggantType;
hitTrigger = true;
mPresence.setText("VALID TAGGANT DETECTED");
mPresence.setBackgroundColor(Color.parseColor("#11D901"));
} else if(taggantType == 0 && hitTrigger) {
hitTrigger = false;
mPresence.setText("NO TAGGANT DETECTED");
mPresence.setBackgroundColor(Color.parseColor("#ffc4ab"));
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentDateandTime = sdf.format(new Date());
String saveData =
"Device: " + mConnectedDeviceName +
System.getProperty("line.separator") +
"Timestamp: " + currentDateandTime +
System.getProperty("line.separator") +
"Location: " + latitude + " (lat)/" + longitude + " (lon)" +
System.getProperty("line.separator") +
"Taggan Type: N" + Integer.toString(savedTaggantType) +
System.getProperty("line.separator") +
"Phone id: " + telephonyManager.getDeviceId() +
System.getProperty("line.separator") +
"=========================" +
System.getProperty("line.separator");
String csvData = mConnectedDeviceName + "," +
currentDateandTime + "," +
"\"http://maps.google.com/?q=" + latitude + "," + longitude + "\"," +
"N" + Integer.toString(savedTaggantType) + "," +
"\"" + telephonyManager.getDeviceId() + "\"" +
System.getProperty("line.separator");
mReadingLog.setText(saveData + mReadingLog.getText());
mShowData.setText(saveData); //kg 8/25/17
maxU1 = 0;
maxU2 = 0;
maxU3 = 0;
savedTaggantType = 0;
if(SP.getBoolean("writeToFile", true)) {
writeToFile(saveData, csvData, true);
}
}
}
/**
* @param readMessage String
*/
public void readIris(String readMessage) {
if(!readoutStarted) {
return;
}
String parsedData[];
if(readMessage.contains(";")) {
readoutStarted = false;
if(readMessage.equals(";")) {
parsedData = bufferedMessage.replaceAll("\n", "").replaceAll(" +", " ").trim().split("\\*");
bufferedMessage = "";
} else {
String partialMessage[] = readMessage.replaceAll("\n", "").replaceAll(" +", " ").trim().split(";");
bufferedMessage += partialMessage[0].trim();
parsedData = bufferedMessage.replaceAll("\n", "").replaceAll(" +", " ").trim().split("\\*");
bufferedMessage = "";
}
} else {
bufferedMessage += readMessage.trim().replaceAll("\n", "").replaceAll(" +", " ");
return;
}
Log.d(TAG, Arrays.toString(parsedData));
boolean passed = false;
int v1 = 0;
int v2 = 0;
if(parsedData[3].equals("S")) {
passed = true;
String values[] = parsedData[7].split("\\s+");
v1 = Integer.parseInt(values[0].replaceAll("[\\D]", ""));
v2 = Integer.parseInt(values[values.length-1]);
} else {
Log.d(TAG, Arrays.toString(parsedData));
String values[] = parsedData[5].split("\\s+");
v1 = Integer.parseInt(values[0].replaceAll("[\\D]", ""));
v2 = Integer.parseInt(values[values.length-1]);
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentDateandTime = sdf.format(new Date());
String saveData =
"Device: " + mConnectedDeviceName +
System.getProperty("line.separator") +
"Timestamp: " + currentDateandTime +
System.getProperty("line.separator") +
"Location: " + latitude + " (lat)/" + longitude + " (lon)" +
System.getProperty("line.separator") +
"Phone id: " + telephonyManager.getDeviceId() +
System.getProperty("line.separator") +
"Valid:" + (passed ? "YES" : "NO") +
System.getProperty("line.separator") +
"Values: " + "T" + v1 + "/" + v2 +
System.getProperty("line.separator") +
"=========================" +
System.getProperty("line.separator");
String csvData = mConnectedDeviceName + "," +
currentDateandTime + "," +
"\"http://maps.google.com/?q=" + latitude + "," + longitude + "\"," +
"Valid: " + (passed ? "YES" : "NO") + " - " + "T" + v1 + "/" + v2 + Integer.toString(savedTaggantType) + "," +
"\"" + telephonyManager.getDeviceId() + "\"" +
System.getProperty("line.separator");
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, R.layout.fragment_bluetooth_scanner, R.id.textView, saveData);
mListView.setAdapter(arrayAdapter);
mReadingLog.setText(saveData + mReadingLog.getText());
mShowData.setText(saveData); //kg 8/25/17
if(SP.getBoolean("writeToFile", true)) {
writeToFile(saveData, csvData, true);
}
}
}
我有这个问题相关的三个XML文件，但由于空间我只包括包含在一个ListView并删除其他按钮。
view_list.xml contains the ListView:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:id="@+id/viewList"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal"
android:paddingLeft="4dp"
android:paddingRight="4dp"
android:visibility="visible">
<LinearLayout
android:layout_width="match_parent"
android:id="@+id/listview_holder"
android:layout_alignParentTop="true"
android:layout_alignTop="@id/button_holder"
android:layout_weight=".1"
android:layout_height="wrap_content">
<ListView
android:id="@+id/scanLogView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:maxLines="4096"
android:scrollbars="vertical"
android:text="@string/app_name"
android:textAppearance="?android:attr/textAppearanceSmall"/>
</LinearLayout>
</RelativeLayout>
</LinearLayout>
可以显示fragment_bluetooth_scanner.xml吗？ –
@NguyễnTrungHiếu对不起，我早点回复，但由于某种原因，它没有发布。我无法在问题框中填入更多字符。我想出了ArrayAdapter的错误，特定于'this'，我做了更改，并且没有构建错误，但现在只添加了一个项目。我不确定发生了什么，但我为这个问题开了一个新问题。 –