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我有共享問題需要跨多個活動保留的全局變量。此變量在TextPlay類中創建並複製到DailyDataEntry類中。我使用Intent在兩個活動之間做了一些研究共享變量，但我希望將該變量分享給多個類。我想我將不得不擴展應用程序，但所有其他類都已經擴展了Activity。我如何在擴展活動的同時擴展應用程序？萬分感謝如何在擴展的同時使用應用程序類來共享變量活動類
/// TextPlay類///
package com.armstrong.y.android.app;
import java.util.Random;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.text.InputType;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.ToggleButton;
public class TextPlay extends Activity implements View.OnClickListener {
Button chkCmd;
ToggleButton passTog;
EditText input;
TextView display;
EditText etUserId;
Button btnUserId;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.text);
baconAndEggs();
passTog.setOnClickListener(this);
chkCmd.setOnClickListener(this);
// Share variables between classes controls
etUserId = (EditText) findViewById(R.id.etUserId);
btnUserId = (Button) findViewById(R.id.btnUserId);
}
private void baconAndEggs() {
// TODO Auto-generated method stub
chkCmd = (Button) findViewById(R.id.bResults);
passTog = (ToggleButton) findViewById(R.id.tbPassword);
input = (EditText) findViewById(R.id.etCommands);
display = (TextView) findViewById(R.id.tvResults);
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.bResults:
// get the text from the command box then convert it to string
String check = input.getText().toString();
display.setText(check);
if (check.contentEquals("left")) {
display.setGravity(Gravity.LEFT);
} else if (check.contentEquals("center")) {
display.setGravity(Gravity.CENTER);
} else if (check.contentEquals("right")) {
display.setGravity(Gravity.RIGHT);
} else if (check.contentEquals("blue")) {
display.setTextColor(Color.BLUE);
display.setText("blue");
} else if (check.contains("hellow")) {
Random crazy = new Random();
display.setText("hello!!!!");
display.setTextSize(crazy.nextInt(75));
display.setTextColor(Color.rgb(crazy.nextInt(255),
crazy.nextInt(255), crazy.nextInt(255)));
switch (crazy.nextInt(3)) {
case 0:
display.setGravity(Gravity.LEFT);
break;
case 1:
display.setGravity(Gravity.CENTER);
break;
case 2:
display.setGravity(Gravity.RIGHT);
break;
}
} else {
display.setText("invalid");
display.setGravity(Gravity.CENTER);
display.setTextColor(Color.BLACK);
}
break;
case R.id.tbPassword:
// If toggle button is set to ON, password will be ***
if (passTog.isChecked()) {
input.setInputType(InputType.TYPE_CLASS_TEXT
| InputType.TYPE_TEXT_VARIATION_PASSWORD);
} else {
// if toggle is off, its going be plain text
input.setInputType(InputType.TYPE_CLASS_TEXT);
}
break;
}
}
}
/// DailyDataEntry類///
package com.armstrong.y.android.app;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class DailyDataEntry extends Activity {
String strdate;
EditText etGetDate;
Calendar calendarDateToday = Calendar.getInstance();
Calendar calendarDateNext = Calendar.getInstance();
Calendar calendarDatePrevious = Calendar.getInstance();
int counterNext = 0;
int counterPrevious = 0;
Button btnTodayDate;
Button btnPreviousDate;
Button btnGetNextDate;
EditText etDailyCaloriesIn;
EditText etDailyCaloriesOut;
EditText etDailyAnxietyLevel;
EditText etDailySleepQuality;
TextView tvUserId;
Button btnSubmit;
Button btnReset;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.daily_data_entry);
// Toast Message Warning
Toast.makeText(getApplicationContext(),
"DO NOT LEAVE FIELD BLANK OR CRASH IS ON YOU!",
Toast.LENGTH_LONG).show();
btnTodayDate = (Button) findViewById(R.id.btnGetTodayDate);
btnPreviousDate = (Button) findViewById(R.id.btnGetPreviousDate);
btnGetNextDate = (Button) findViewById(R.id.btnGetNextDate);
etGetDate = (EditText) findViewById(R.id.etGetDate);
btnSubmit = (Button) findViewById(R.id.btnSubmit);
btnReset = (Button) findViewById(R.id.btnReset);
etDailyCaloriesIn = (EditText) findViewById(R.id.etDailyCaloriesIn);
etDailyCaloriesOut = (EditText) findViewById(R.id.etDailyCaloriesOut);
etDailyAnxietyLevel = (EditText) findViewById(R.id.etDailyAnxietyLevel);
etDailySleepQuality = (EditText) findViewById(R.id.etDailySleepQuality);
tvUserId = (TextView) findViewById(R.id.tvUserId);
// When Submit Button is clicked
btnSubmit.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Grab User Input from EditText and Convert input String to
// Integer
int check1 = Integer.parseInt(etDailyCaloriesIn.getText()
.toString());
int check2 = Integer.parseInt(etDailyCaloriesOut.getText()
.toString());
int check4 = Integer.parseInt(etDailyAnxietyLevel.getText()
.toString());
int check5 = Integer.parseInt(etDailySleepQuality.getText()
.toString());
strdate = etGetDate.getText().toString();
// Run Legal Value Integrity Check
if (strdate.length() != 8) {
etGetDate.setText("Please enter in the correct format.");
} else if (strdate.equals("")) {
etGetDate.setText("Please enter a date.");
} else if (check1 > 10 || check1 < 1) {
etDailyCaloriesIn.setText("Incorrect Value!");
} else if (check2 > 10 || check2 < 1) {
etDailyCaloriesOut.setText("Incorrect Value!");
} else if (check4 > 10 || check4 < 1) {
etDailyAnxietyLevel.setText("Incorrect Value!");
} else if (check5 > 10 || check5 < 1) {
etDailySleepQuality.setText("Incorrect Value!");
} else {
etGetDate.setText("Submited!");
etDailyCaloriesIn.setText("Submited!");
etDailyCaloriesOut.setText("Submited!");
etDailyAnxietyLevel.setText("Submited!");
etDailySleepQuality.setText("Submited!");
}
}
});
// When Reset Button is Clicked
btnReset.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String empty = "";
etDailyCaloriesIn.setText(empty);
etDailyCaloriesOut.setText(empty);
etDailyAnxietyLevel.setText(empty);
etDailySleepQuality.setText(empty);
etGetDate.setText(empty);
}
});
// Capture Today's Date
btnTodayDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
SimpleDateFormat sdf = new SimpleDateFormat("MMddyyyy");
strdate = sdf.format(calendarDateToday.getTime());
etGetDate.setText(strdate);
}
});
// Capture Previous's Date
btnPreviousDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
SimpleDateFormat sdf = new SimpleDateFormat("MMddyyyy");
if (counterPrevious == 0) {
calendarDatePrevious.add(Calendar.DATE, -1);
}
strdate = sdf.format(calendarDatePrevious.getTime());
etGetDate.setText(strdate);
counterPrevious++;
}
});
// Capture Next's Date
btnGetNextDate.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
SimpleDateFormat sdf = new SimpleDateFormat("MMddyyyy");
if (counterNext == 0) {
calendarDateNext.add(Calendar.DATE, +1);
}
strdate = sdf.format(calendarDateNext.getTime());
etGetDate.setText(strdate);
counterNext++;
}
});
}
}