1
我正在製作一個應用程序，我在使用日期功能，但照顧幾個現有的帖子，我仍然無法讓我的SimpleDateFormat解析器工作。android unparseble date異常？
下面是代碼：
public class GPSDemo extends Activity {
public static String TAG = "Abhi's Log";
public static String IMEII = "imei";
public static String START_TIME = "startTime";
public static String WORKING_STATUS = "workingStatus";
public static String ADDRESS = "address";
public static int level = 0;
Button stop, hide;
SharedPreferences pref;
Editor edit;
Date d1 = null;
Date d2 = null;
String startingTime;
String currentTime;
Context ctx = this;
TextView txt_start_time, txt_total_time, txt_total_distance, txt_address;
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.demoooo);
pref = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
edit = pref.edit();
ConnectivityManager connectivityManager = (ConnectivityManager)getSystemService(getBaseContext().CONNECTIVITY_SERVICE);
this.registerReceiver(this.batteryInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
txt_start_time = (TextView) findViewById(R.id.txt_start_time);
txt_total_time = (TextView) findViewById(R.id.txt_total_time);
txt_total_distance = (TextView) findViewById(R.id.txt_total_distance);
txt_address = (TextView) findViewById(R.id.txt_address);
try {
TelephonyManager mTelephonyMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
Editor edit = PreferenceManager
.getDefaultSharedPreferences(
getApplicationContext()).edit();
edit.putString(IMEII, mTelephonyMgr.getDeviceId());
edit.commit();
Log.i(TAG, "IMEI Stored Sucessfully : "
+ PreferenceManager.getDefaultSharedPreferences(getApplicationContext()).getString(IMEII, ""));
} catch (Exception e) {
Log.d(TAG, "Exception While Storin Data : " + e);
}
// turnGPSOn(this);
// turnGPSOn();
if(!isInternetOn()) {
try {
Method method = connectivityManager.getClass().getMethod("setMobileDataEnabled", boolean.class);
method.invoke(connectivityManager, true);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
stop = (Button) findViewById(R.id.btn_stop);
hide = (Button) findViewById(R.id.btn_hide);
try {
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
if(pref.getString(WORKING_STATUS, "").equals("NO")) {
Intent intent = new Intent(GPSDemo.this, NetworkTrackerService.class);
startService(intent);
edit.putString(WORKING_STATUS, "YES");
edit.putString(START_TIME, sdf.format(new Date()));
edit.commit();
txt_start_time.setText(sdf.format(new Date()));
} else if(pref.getString(WORKING_STATUS, "").equals("YES")) {
txt_start_time.setText(pref.getString(START_TIME, ""));
}
updateInof();
startInfoUpdater();
Log.i("Abhi's Log", "Values Stored :: " +pref.getString(WORKING_STATUS, "") +" " + pref.getString(START_TIME, ""));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
stop.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(GPSDemo.this, NetworkTrackerService.class);
edit.putString(WORKING_STATUS, "NO");
edit.putString(START_TIME, "");
edit.putString(ADDRESS, "");
edit.commit();
stopService(intent);
System.exit(0);
}
});
hide.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
GPSDemo.this.finish();
}
});
}
@SuppressLint("NewApi")
@SuppressWarnings("deprecation")
public void turnGPSOn(Context context)
{
Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", true);
context.sendBroadcast(intent);
String provider = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if (! provider.contains("gps"))
{ //if gps is disabled
final Intent poke = new Intent();
poke.setClassName("com.tracking.gps", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
context.sendBroadcast(poke);
}
}
public void turnGPSOn()
{
Intent intent = new Intent("android.location.GPS_ENABLED_CHANGE");
intent.putExtra("enabled", true);
this.ctx.sendBroadcast(intent);
String provider = Settings.Secure.getString(ctx.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(!provider.contains("gps"))
{
//if gps is disabled
final Intent poke = new Intent();
poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
this.ctx.sendBroadcast(poke);
}
}
@SuppressLint("NewApi")
@SuppressWarnings("deprecation")
public static void turnGPSOff(Context context)
{
String provider = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if (provider.contains("gps"))
{ //if gps is enabled
final Intent poke = new Intent();
poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
context.sendBroadcast(poke);
}
}
private void startInfoUpdater() {
// TODO Auto-generated method stub
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
//Do something after 100ms
Log.v("Abhi's Tag", "Inside Schedulat ... !!!");
updateInof();
startInfoUpdater();
}
}, 60000);
}
protected void updateInof() {
// TODO Auto-generated method stub
long diffSeconds, diffMinutes = 0, diffHours = 0, diffDays = 0;
SimpleDateFormat sdf1 = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
currentTime = sdf1.format(new Date());
try {
d1 = sdf1.parse(pref.getString(START_TIME, ""));
d2 = sdf1.parse(currentTime);
long diff = d2.getTime() - d1.getTime();
diffSeconds = diff/(1000);
diffMinutes = diff/(60 * 1000);
diffHours = diff/(60 * 60 * 1000);
diffDays = diff/(24 * 60 * 60 * 1000);
Log.i("Abhi's Tag", "Days : " + diffDays);
Log.i("Abhi's Tag", "Hours : " + diffHours);
Log.i("Abhi's Tag", "Minutes : " + diffMinutes);
Log.i("Abhi's Tag", "Seconds : " + diffSeconds);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
txt_start_time.setText(pref.getString(START_TIME, ""));
txt_total_time.setText(diffDays+" D, " + diffHours + " H, " + diffMinutes + " M");
txt_address.setText(pref.getString(ADDRESS, ""));
}
private BroadcastReceiver batteryInfoReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
level= intent.getIntExtra(BatteryManager.EXTRA_LEVEL,0);
SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context);
Editor edit = pref.edit();
edit.putInt("batteryStatus", level);
edit.commit();
}
};
public final boolean isInternetOn() {
ConnectivityManager connec = (ConnectivityManager)getSystemService(getBaseContext().CONNECTIVITY_SERVICE);
if (connec.getNetworkInfo(0).getState() == android.net.NetworkInfo.State.CONNECTED ||
connec.getNetworkInfo(0).getState() == android.net.NetworkInfo.State.CONNECTING ||
connec.getNetworkInfo(1).getState() == android.net.NetworkInfo.State.CONNECTING ||
connec.getNetworkInfo(1).getState() == android.net.NetworkInfo.State.CONNECTED) {
return true;
} else if (connec.getNetworkInfo(0).getState() == android.net.NetworkInfo.State.DISCONNECTED ||
connec.getNetworkInfo(1).getState() == android.net.NetworkInfo.State.DISCONNECTED ) {
return false;
}
return false;
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
}
}
，我得到這個錯誤
java.text.ParseException: Unparseable date:""
好的先生，我嘗試三江源... :) – User11
先生，你能elobrate更,,請......，我沒有得到proprly – User11
@ R.T。如果存在'START_TIME'的首選項值，則獲得該字符串。如果沒有，默認情況下會得到''「''。它是一個空字符串，你解析爲'sdf1.parse（「」）;'爲什麼你會得到異常 – Raghunandan