自己设计了该应用程序的图标。
改了布局文件中的一些属性来保持界面干净美观。
MainActivity
??该活动是本App进入后的第一个界面，界面主要是大致的介绍和一个跳转按钮。
??该活动是承接MainActivity活动的第二个界面，这个界面上半部分是对该APP功能的一个简单说明。下方是具体三个板块——红笺小字，抒写心情?、日账管家?、生活计划?。这三个板块分别在该活动上体现为一个按钮，通过选择可以进入不同的功能界面。
public class AddNoteActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_note);
}
public void cancel(View view) {
finish();
}
public void addNote(View view) {
String fileName = ((EditText)
findViewById(R.id.noteTitle))
.getText().toString();
String body = ((EditText) findViewById(R.id.noteBody))
.getText().toString();
File parent = getFilesDir();
File file = new File(parent, fileName);
PrintWriter writer = null;
try {
writer = new PrintWriter(file);
writer.write(body);
finish();
} catch (Exception e) {
showAlertDialog("Error adding note", e.getMessage());
} finally {
if (writer != null) {
try {
writer.close();
} catch (Exception e) {
}
}
}
}
private void showAlertDialog(String title, String message) {
AlertDialog alertDialog = new
AlertDialog.Builder(this).create();
alertDialog.setTitle(title);
alertDialog.setMessage(message);
alertDialog.show();
}
}public class Second1Activity extends Activity {
private String selectedItem;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second1);
ListView listView = (ListView) findViewById(R.id.listView1);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setOnItemClickListener(
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView,
View view, int position, long id) {
readNote(position);
}
});
}
@Override
public void onResume() {
super.onResume();
refreshList();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.action_add:
startActivity(new Intent(this,
AddNoteActivity.class));
return true;
case R.id.action_delete:
deleteNote();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void refreshList() {
ListView listView = (ListView) findViewById(
R.id.listView1);
String[] titles = fileList();
ArrayAdapter<String> arrayAdapter =
new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_activated_1,
titles);
listView.setAdapter(arrayAdapter);
}
private void readNote(int position) {
String[] titles = fileList();
if (titles.length > position) {
selectedItem = titles[position];
File dir = getFilesDir();
File file = new File(dir, selectedItem);
FileReader fileReader = null;
BufferedReader bufferedReader = null;
try {
fileReader = new FileReader(file);
bufferedReader = new BufferedReader(fileReader);
StringBuilder sb = new StringBuilder();
String line = bufferedReader.readLine();
while (line != null) {
sb.append(line);
line = bufferedReader.readLine();
}
((TextView) findViewById(R.id.textView1)).
setText(sb.toString());
} catch (IOException e) {
} finally {
if (bufferedReader != null) {
try {
bufferedReader.close();
} catch (IOException e) {
}
}
if (fileReader != null) {
try {
fileReader.close();
} catch (IOException e) {
}
}
}
}
}
private void deleteNote() {
if (selectedItem != null) {
deleteFile(selectedItem);
selectedItem = null;
((TextView) findViewById(R.id.textView1)).setText("");
refreshList();
}
}
}Second1Activity活动使用一个ListView，它列出了系统中所有备忘的标题。Add启动ADDNoteActivity活动，Delete删除所选的备忘。
value1 = Double.parseDouble(etvalue1.getText().toString());
value2 = Double.parseDouble(etvalue2.getText().toString());
value3 = Double.parseDouble(etvalue3.getText().toString());
value4 = Double.parseDouble(etvalue4.getText().toString());
value5 = Double.parseDouble(etvalue5.getText().toString());
value6 = Double.parseDouble(budget.getText().toString());
result = value1+ value2 + value3 + value4 + value5;
textView.setText("" + result + "");
if(result > value6) {
Toast.makeText(Second2Activity.this, "花销已超出预算，请注意开支！(；′⌒`)", Toast.LENGTH_LONG).show();
}
else {
Toast.makeText(Second2Activity.this, "花销合理有余，请继续保持哦。(*￣︶￣)", Toast.LENGTH_LONG).show();
}
public class Second3Activity extends Activity {
private EditText period;
private int value;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second3);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(
MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void setAlarm(View view) {
period = (EditText)findViewById(R.id.editText16);
value = Integer.parseInt(period.getText().toString());
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.HOUR, value);
Date hoursLater = calendar.getTime();
Toast.makeText(this, "The alarm will set off at " +
hoursLater, Toast.LENGTH_LONG).show();
AlarmManager alarmMgr = (AlarmManager) getSystemService(
Context.ALARM_SERVICE);
Intent intent = new Intent(this, WakeUpActivity.class);
PendingIntent sender = PendingIntent.getActivity(
this, 0, intent, 0);
alarmMgr.set(AlarmManager.RTC_WAKEUP,
hoursLater.getTime(), sender);
}
}该类中的setAlarm方法创建了一个Date实例，指向从现在开始的某一段时间，然后创建了一个PendingIntent封装了一个意图，该意图将会启动WakeUpActivity活动。然后，它访问了AlarmManager,并且通过传递时间和PendingIntent来设置了一个闹钟。
20172328 暑假作业 之 实现安卓小程序Enjoy-all
原文：https://www.cnblogs.com/LXY462283007/p/10067888.html