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WebDucer
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Hausaufgaben zum dritten Tag
1 parent e99c622 commit bb5b99f

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‎Zeiterfassung/src/de/mvhs/android/zeiterfassung/MainActivity.java‎

Lines changed: 116 additions & 125 deletions
Original file line numberDiff line numberDiff line change
@@ -3,140 +3,131 @@
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import java.util.Date;
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import android.app.Activity;
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import android.content.ContentUris;
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import android.content.ContentValues;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteDatabase;
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import android.net.Uri;
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import android.os.Bundle;
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import android.provider.BaseColumns;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.widget.Button;
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import android.widget.EditText;
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import de.mvhs.android.zeiterfassung.db.DBHelper;
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import de.mvhs.android.zeiterfassung.db.ZeitContracts;
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public class MainActivity extends Activity {
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private boolean _IsStarted = false;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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if (savedInstanceState != null) {
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_IsStarted = savedInstanceState.getBoolean("CurrentState", false);
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}
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setButtonState();
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}
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@Override
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protected void onStart() {
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super.onStart();
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// Buttons registrieren
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Button commandStart = (Button) findViewById(R.id.StartCommand);
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Button commandEnd = (Button) findViewById(R.id.EndCommand);
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// Click Event registrieren
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commandStart.setOnClickListener(new OnStartButtonClicked());
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commandEnd.setOnClickListener(new OnEndButtonClicked());
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}
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@Override
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protected void onSaveInstanceState(Bundle outState) {
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outState.putBoolean("CurrentState", _IsStarted);
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super.onSaveInstanceState(outState);
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}
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@Override
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protected void onStop() {
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// Buttons registrieren
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Button commandStart = (Button) findViewById(R.id.StartCommand);
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Button commandEnd = (Button) findViewById(R.id.EndCommand);
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// Click Event deregistrieren
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commandStart.setOnClickListener(null);
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commandEnd.setOnClickListener(null);
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super.onStop();
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}
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private void setButtonState() {
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Button commandStart = (Button) findViewById(R.id.StartCommand);
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Button commandEnd = (Button) findViewById(R.id.EndCommand);
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commandStart.setEnabled(_IsStarted == false);
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commandEnd.setEnabled(_IsStarted);
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}
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private final class OnEndButtonClicked implements OnClickListener {
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@Override
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public void onClick(View v) {
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// Verhalten beim Click auf den Ende-Button
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EditText endTime = (EditText) findViewById(R.id.EndTime);
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endTime.setText(new Date().toString());
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_IsStarted = false;
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setButtonState();
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DBHelper helper = new DBHelper(MainActivity.this);
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SQLiteDatabase db = helper.getReadableDatabase();
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Cursor data = db.query("zeit", // Tabelle
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new String[] { BaseColumns._ID }, // Spalten
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"IFNULL(end_time,'')=''", // Bedingung
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null, // Argumente für die bedingung
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null, // Grupierung
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null, // Having
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null); // Sortierung
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if (data != null && data.moveToFirst()) {
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// Datensatz gefunden, kann aktualisiert werden
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SQLiteDatabase updateDb = helper.getWritableDatabase();
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long id = data.getLong(0);
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ContentValues values = new ContentValues();
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values.put("end_time", new Date().toString());
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updateDb.update("zeit", values, "_id=?",
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new String[] { String.valueOf(id) });
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updateDb.close();
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}
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// Alles schließen
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if (data != null) {
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data.close();
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}
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db.close();
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helper.close();
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}
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}
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private final class OnStartButtonClicked implements OnClickListener {
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@Override
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public void onClick(View v) {
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// Verhalten beim Klick auf den Strat Button
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EditText startTime = (EditText) findViewById(R.id.StartTime);
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startTime.setText(new Date().toString());
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_IsStarted = true;
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setButtonState();
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// DBHelper helper = new DBHelper(MainActivity.this);
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// SQLiteDatabase db = helper.getWritableDatabase();
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//
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// ContentValues values = new ContentValues();
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// values.put("start_time", new Date().toString());
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//
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// db.insert("zeit", null, values);
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//
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// db.close();
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ContentValues values = new ContentValues();
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values.put(ZeitContracts.Zeit.Columns.START, new Date().toString());
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getContentResolver().insert(ZeitContracts.Zeit.CONTENT_URI, values);
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}
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}
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private boolean _IsStarted = false;
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private Button _StartCommand = null;
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private Button _StopCommand = null;
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private EditText _StartTime = null;
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private EditText _EndTime = null;
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private long _CurrentId = -1;
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private final static String[] _SEARCH_PROJECTION = { ZeitContracts.Zeit.Columns._ID, ZeitContracts.Zeit.Columns.START };
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private final static String _SEARCH_SELECTION = "IFNULL(" + ZeitContracts.Zeit.Columns.START + ",'')=''";
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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}
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@Override
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protected void onStart() {
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super.onStart();
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// UI Elemente initialisieren
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_StartCommand = (Button) findViewById(R.id.StartCommand);
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_StopCommand = (Button) findViewById(R.id.EndCommand);
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_StartTime = (EditText) findViewById(R.id.StartTime);
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_EndTime = (EditText) findViewById(R.id.EndTime);
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// Click Event registrieren
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_StartCommand.setOnClickListener(new OnStartButtonClicked());
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_StopCommand.setOnClickListener(new OnEndButtonClicked());
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// Bearbeitung in den Textfeldern verbieten
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_StartTime.setKeyListener(null);
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_EndTime.setKeyListener(null);
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// Prüfen, ob ein angefangener Eintrag in der Datenbank vorliegt
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checkTrackState();
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}
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@Override
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protected void onStop() {
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// Click Event deregistrieren
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_StartCommand.setOnClickListener(null);
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_StopCommand.setOnClickListener(null);
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super.onStop();
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}
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private void setButtonState() {
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_StartCommand.setEnabled(_IsStarted == false);
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_StopCommand.setEnabled(_IsStarted);
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}
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private void checkTrackState() {
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Cursor data = getContentResolver().query(ZeitContracts.Zeit.CONTENT_URI, _SEARCH_PROJECTION, _SEARCH_SELECTION, null, null);
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if (data != null && data.moveToFirst()) {
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// Ein Eintrag gefunden
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_CurrentId = data.getLong(0);
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String startDate = data.getString(1);
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_StartTime.setText(startDate);
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_EndTime.setText("");
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_IsStarted = true;
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} else {
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// Keine Einträge gefunden
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_StartTime.setText("");
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_EndTime.setText("");
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_IsStarted = false;
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}
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setButtonState();
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}
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private final class OnEndButtonClicked implements OnClickListener {
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@Override
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public void onClick(View v) {
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// Verhalten beim Click auf den Ende-Button
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Date currentTime = new Date();
102+
_EndTime.setText(currentTime.toString());
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ContentValues values = new ContentValues();
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values.put(ZeitContracts.Zeit.Columns.END, currentTime.toString());
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Uri updateUri = ContentUris.withAppendedId(ZeitContracts.Zeit.CONTENT_URI, _CurrentId);
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getContentResolver().update(updateUri, values, null, null);
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_IsStarted = false;
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setButtonState();
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}
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}
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private final class OnStartButtonClicked implements OnClickListener {
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@Override
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public void onClick(View v) {
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// Verhalten beim Klick auf den Strat Button
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Date currentTime = new Date();
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_StartTime.setText(currentTime.toString());
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ContentValues values = new ContentValues();
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values.put(ZeitContracts.Zeit.Columns.START, currentTime.toString());
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getContentResolver().insert(ZeitContracts.Zeit.CONTENT_URI, values);
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_IsStarted = true;
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setButtonState();
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}
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}
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}

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