例如，我有activity1，activity2，activity3，最后是valueAllActivity？ 如何将数据从activity1，activity2，activity3传递到 - ＆gt; valueAllActivity？
将每个活动中的INT值传递给valueAllActivity。
我是开发Android程序的新手，所以如果有人可以指导，那将是一种荣誉:) 谢谢
//活性1
package lynn.calculate.KaunterKalori;
import lynn.calculate.KaunterKalori.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.content.Intent;
public class Breakfast extends Activity {
public static int TotalKalori;
ArrayAdapter<String> FoodType1Adapter;
ArrayAdapter<String> DrinkType1Adapter;
String FoodTypeArray[] = { "","white bread"}
int[] valueFoodTypeArray = { 0,20};
String[] DrinkTypeArray = { "","tea"};
int[] valueDrinkTypeArray = { 0,201};
Spinner FoodTypeSpinner;
Spinner DrinkTypeSpinner;
TextView SarapanTotalKalori;
public void onCreate(Bundle savedInstancesState) {
super.onCreate(savedInstancesState);
setContentView(R.layout.breakfast);
FoodTypeSpinner = (Spinner) findViewById(R.id.spinner1);
DrinkTypeSpinner = (Spinner) findViewById(R.id.spinner2);
SarapanTotalKalori = (TextView) findViewById(R.id.JumlahKalori);
initializeSpinnerAdapters();
// load the default values for the spinners
loadFoodValue1Range();
loadDrinkValue1Range();
}
// nk handle button --> refer calculate button
public void calculateClickHandler(View view) {
if (view.getId() == R.id.button1) {
// nk bace dkat spinner
int food1 = getSelectedFood();
int drink1 = getSelectedDrink();
// kira kalori sarapan
// view kalori sarapan
int totalKalori1 = calculateSarapan(food1, drink1);
SarapanTotalKalori.setText(totalKalori1 + "");
//setttlBreakfast(totalKalori1);
Intent b= new Intent(Breakfast.this, Lunch.class);
b.putExtra("totalBreakfast",totalKalori1);
Breakfast.this.startActivity(b);
}
}
public int getSelectedFood() {
String selectedFoodValue = (String) FoodTypeSpinner.getSelectedItem();
int index = 0;
for (int i = 0; i < FoodTypeArray.length; i++) {
if (selectedFoodValue.equals(FoodTypeArray[i])) {
index = i;
break;
}
}
return valueFoodTypeArray[index];
}
public int getSelectedDrink() {
String selectedDrinkValue = (String) DrinkTypeSpinner.getSelectedItem();
int index = 0;
for (int i = 0; i < DrinkTypeArray.length; i++) {
if (selectedDrinkValue.equals(DrinkTypeArray[i])) {
index = i;
break;
}
}
return valueDrinkTypeArray[index];
}
public int calculateSarapan(int food1, int drink1) {
return (int) (food1 + drink1);
}
public void loadFoodValue1Range() {
FoodTypeSpinner.setAdapter(FoodType1Adapter);
// set makanan b4 pilih
FoodTypeSpinner.setSelection(FoodType1Adapter.getPosition("400"));
}
public void loadDrinkValue1Range() {
DrinkTypeSpinner.setAdapter(DrinkType1Adapter);
DrinkTypeSpinner.setSelection(DrinkType1Adapter.getPosition("77"));
}
public void initializeSpinnerAdapters() {
FoodType1Adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, FoodTypeArray);
DrinkType1Adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, DrinkTypeArray);
}
}
//活动2
package lynn.calculate.KaunterKalori;
import lynn.calculate.KaunterKalori.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
public class Lunch extends Activity {
public static int TotalKalori;
private int totalKalori1;
/* private int ttlLunch;
public void setttlLunch(int ttlLunch){
this.ttlLunch=ttlLunch;
}
public int getttlLunch(){
return ttlLunch;
} */
ArrayAdapter<String> FoodType2Adapter;
ArrayAdapter<String> DrinkType2Adapter;
ArrayAdapter<String> LaukType2Adapter;
String FoodType2Array[] = { "","Burger"};
int[] valueFoodType2Array = { 0, 150 };
String DrinkType2Array[] = { "","Pepsi" };
int[] valueDrinkType2Array = { 0,100 };
String LaukType2Array[] = { "","Wings" };
int[] valueLaukType2Array = { 0,200 };
Spinner FoodType2Spinner;
Spinner DrinkType2Spinner;
Spinner LaukType2Spinner;
TextView LunchTotalKalori;
protected void onCreate(Bundle savedInstancesState) {
super.onCreate(savedInstancesState);
setContentView(R.layout.lunch);
FoodType2Spinner = (Spinner) findViewById(R.id.spinner1);
LaukType2Spinner = (Spinner) findViewById(R.id.spinner2);
DrinkType2Spinner = (Spinner) findViewById(R.id.spinner3);
LunchTotalKalori = (TextView) findViewById(R.id.JumlahKalori);
initializeSpinnerAdapters();
loadFoodValue2Range();
loadDrinkValue2Range();
loadLaukValue2Range();
}
public void calculateClickHandler(View view) {
if (view.getId() == R.id.button1) {
int food2 = getSelectedFood2();
int drink2 = getSelectedDrink2();
int lauk2 = getSelectedLauk2();
int totalKalori2 = calculateLunch(food2, drink2, lauk2);
LunchTotalKalori.setText(totalKalori2 + "");
Bundle extras = getIntent().getExtras();
if (extras != null){
totalKalori1 = extras.getInt("totalBreakfast");
totalKalori2 = extras.getInt("totalLunch");
}
//setttlLunch(totalKalori2);
Intent n= new Intent(Lunch.this, Dinner.class);
n.putExtra("totalBreakfast", totalKalori1);
n.putExtra("totalLunch", totalKalori2);
Lunch.this.startActivity(n);
}
}
public int getSelectedFood2() {
String selectedFoodValue2 = (String) FoodType2Spinner.getSelectedItem();
int index = 0;
for (int i = 0; i < FoodType2Array.length; i++) {
if (selectedFoodValue2.equals(FoodType2Array[i])) {
index = i;
break;
}
}
return valueFoodType2Array[index];
}
public int getSelectedDrink2() {
String selectedDrinkValue2 = (String) DrinkType2Spinner
.getSelectedItem();
int index = 0;
for (int i = 0; i < DrinkType2Array.length; i++) {
if (selectedDrinkValue2.equals(DrinkType2Array[i])) {
index = i;
break;
}
}
return valueDrinkType2Array[index];
}
public int getSelectedLauk2() {
String selectedLaukValue2 = (String) LaukType2Spinner.getSelectedItem();
int index = 0;
for (int i = 0; i < LaukType2Array.length; i++) {
if (selectedLaukValue2.equals(LaukType2Array[i])) {
index = i;
break;
}
}
return valueLaukType2Array[index];
}
public int calculateLunch(double food2, double drink2, double lauk2) {
return (int) (food2 + drink2 + lauk2);
}
public void loadFoodValue2Range(){
FoodType2Spinner.setAdapter(FoodType2Adapter);
FoodType2Spinner.setSelection(FoodType2Adapter.getPosition("200"));
}
public void loadDrinkValue2Range(){
DrinkType2Spinner.setAdapter(DrinkType2Adapter);
DrinkType2Spinner.setSelection(DrinkType2Adapter.getPosition("77"));
}
public void loadLaukValue2Range(){
LaukType2Spinner.setAdapter(LaukType2Adapter);
LaukType2Spinner.setSelection(LaukType2Adapter.getPosition("2"));
}
public void initializeSpinnerAdapters(){
FoodType2Adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, FoodType2Array);
DrinkType2Adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, DrinkType2Array);
LaukType2Adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, LaukType2Array);
}
}
//活动3
package lynn.calculate.KaunterKalori;
import lynn.calculate.KaunterKalori.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
public class Dinner extends Activity {
public static int TotalKalori;
private int totalKalori1;
private int totalKalori2;
/*private int ttlDinner;
public void setttlDinner(int ttlDinner){
this.ttlDinner=ttlDinner;
}
public int getttlDinner(){
return ttlDinner;
} */
ArrayAdapter<String> FoodType3Adapter;
ArrayAdapter<String> ProteinType3Adapter;
ArrayAdapter<String> DrinkType3Adapter;
String FoodType3Array[] = { "","chicken chop" };
int[] valueFoodType3Array = { 0, 204};
String ProteinType3Array[] = { "","chicken breast", };
int[] valueProteinType3Array = { 0, 40 };
String DrinkType3Array[] = { "","mineral water" };
int[] valueDrinkType3Array = { 0, 0};
Spinner FoodType3Spinner;
Spinner ProteinType3Spinner;
Spinner DrinkType3Spinner;
TextView DinnerTotalKalori;
protected void onCreate(Bundle savedInstancesState) {
super.onCreate(savedInstancesState);
setContentView(R.layout.dinner);
FoodType3Spinner = (Spinner) findViewById(R.id.spinner1);
ProteinType3Spinner = (Spinner) findViewById(R.id.spinner2);
DrinkType3Spinner = (Spinner) findViewById(R.id.spinner3);
DinnerTotalKalori = (TextView) findViewById(R.id.JumlahKalori);
initializeSpinnerAdapters();
loadFoodValue3Range();
loadProteinValue3Range();
loadDrinkValue3Range();
}
public void calculateClickHandler(View view) {
if (view.getId() == R.id.button1) {
int food3 = getSelectedFood3();
int protein3 = getSelectedProtein3();
int drink3 = getSelectedDrink3();
int totalKalori3 = calculateDinner(food3, protein3, drink3);
DinnerTotalKalori.setText(totalKalori3 + "");
Bundle extras = getIntent().getExtras();
if (extras != null){
totalKalori1 = extras.getInt("totalBreakfast");
totalKalori2 = extras.getInt("totalLunch");
totalKalori3 = extras.getInt("totalDinner");
}
//setttlDinner(totalKalori3);
Intent d= new Intent(Dinner.this, CalculateAll.class);
d.putExtra("totalBreakfast", totalKalori1);
d.putExtra("totalLunch", totalKalori2);
d.putExtra("totalDinner", totalKalori3);
startActivity(d);
}
}
public int getSelectedFood3() {
String selectedFoodValue3 = (String) FoodType3Spinner.getSelectedItem();
int index = 0;
for (int i = 0; i < FoodType3Array.length; i++) {
if (selectedFoodValue3.equals(FoodType3Array[i])) {
index = i;
break;
}
}
return valueFoodType3Array[index];
}
public int getSelectedProtein3() {
String selectedProteinValue3 = (String) ProteinType3Spinner
.getSelectedItem();
int index = 0;
for (int i = 0; i < ProteinType3Array.length; i++) {
if (selectedProteinValue3.equals(ProteinType3Array[i])) {
index = i;
break;
}
}
return valueProteinType3Array[index];
}
public int getSelectedDrink3() {
String selectedDrinkValue3 = (String) DrinkType3Spinner
.getSelectedItem();
int index = 0;
for (int i = 0; i < DrinkType3Array.length; i++) {
if (selectedDrinkValue3.equals(DrinkType3Array[i])) {
index = i;
break;
}
}
return valueDrinkType3Array[index];
}
public int calculateDinner(int food3, int protein3, int drink3) {
return (int) (food3 + protein3 + drink3);
}
public void loadFoodValue3Range() {
FoodType3Spinner.setAdapter(FoodType3Adapter);
FoodType3Spinner.setSelection(FoodType3Adapter.getPosition("10"));
}
public void loadProteinValue3Range() {
ProteinType3Spinner.setAdapter(ProteinType3Adapter);
ProteinType3Spinner.setSelection(ProteinType3Adapter.getPosition("99"));
}
public void loadDrinkValue3Range(){
DrinkType3Spinner.setAdapter(DrinkType3Adapter);
DrinkType3Spinner.setSelection(DrinkType3Adapter.getPosition("10"));
}
public void initializeSpinnerAdapters(){
FoodType3Adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, FoodType3Array);
ProteinType3Adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, ProteinType3Array);
DrinkType3Adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, DrinkType3Array);
}
}
// CalulateAllActivity - 我想要添加所有值（int）
package lynn.calculate.KaunterKalori;
import lynn.calculate.KaunterKalori.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
public class CalculateAll extends Activity {
public static int TotalKalori;
private int totalKalori1;
private int totalKalori2;
private int totalKalori3;
ArrayAdapter<String> SexTypeAdapter;
String SexTypeArray[] = { "Lelaki", "Perempuan" };
Spinner SexTypeSpinner;
TextView TotalKaloriSehari;
TextView totalsarapan;
public CalculateAll() {
}
@Override
public void onCreate(Bundle savedInstancesState) {
super.onCreate(savedInstancesState);
setContentView(R.layout.calculate_all);
SexTypeSpinner = (Spinner) findViewById(R.id.spinnerSex);
TotalKaloriSehari = (TextView) findViewById(R.id.JumlahKalori);
}
public void calculateClickHandler(View view) {
if (view.getId() == R.id.buttonKiraAll) {
// public final int TotalKalori;
Bundle extras = getIntent().getExtras();
if (extras != null){
totalKalori1 = extras.getInt("totalBreakfast");
totalKalori2 = extras.getInt("totalLunch");
totalKalori3 = extras.getInt("totalDinner");
}
//setttlLunch(totalKalori2);
Intent n= new Intent(this, CalculateAll.class);
n.putExtra("totalBreakfast", totalKalori1);
n.putExtra("totalLunch", totalKalori2);
n.putExtra("totalDinner", totalKalori3);
startActivity(n);
int TotalKalori = calculateTotalKalori(totalKalori1, totalKalori2, totalKalori3);
TotalKaloriSehari.setText(TotalKalori+ "");
// int ttlCAl =getttlBreakfast()+getttlLunch()+getttlDinner();
//String finalString = Integer.toString(calcAll());
//TextView tv1 = (TextView) findViewById(R.id.JumlahKalori);
//tv1.setText(finalString);
}
}
public int calculateTotalKalori(int totalKalori1, int totalKalori2,
int totalKalori3) {
return (int) (totalKalori1 + totalKalori2 + totalKalori3);
}
}
谢谢任何试图帮助我的人。非常感谢:)正如你所知，我在早期阶段开发程序，所以非常感谢大家：）
答案 0 :(得分：5)
你会通过意图来做到这一点。假设data1和data2是字符串，data3是int。
在您设置调用下一个活动的意图时的第一个活动中：
Intent myIntent = new Intent(Activity1.this, Activity2.class);
myIntent.putExtra("Data1", data1);
myIntent.putExtra("Data2", data2);
myIntent.putExtra("Data3", data3);
Activity1.this.startActivity(myIntent);
然后在活动2中：
Private String data1;
Private String data2;
Private int data3;
Bundle extras = getIntent().getExtras();
if (extras != null) {
data1 = extras.getString("Data1");
data2 = extras.getString("Data2");
data3 = extras.getInt("Data3");
}
// other code
Intent myIntent = new Intent(Activity2.this, Activity3.class);
myIntent.putExtra("Data1", data1);
myIntent.putExtra("Data2", data2);
myIntent.putExtra("Data3", data3);
Activity2.this.startActivity(myIntent);
依此类推，通过尽可能多的活动。
您可以使用您想要的任何标识符。上面我使用了Data1，Data2，Data3。它们也可以被称为Make，Model和TopSpeed。只要您使用相同的ID来获取数据就可以了，它就没问题了。
修改
我看到的一些事情......
首先，使用getExtra从onCreate方法中为每个活动从数据包中获取数据。将意图调用到您需要的任何地方。
然后，您的一个问题出现在活动2中：
if (extras != null){
totalKalori1 = extras.getInt("totalBreakfast");
totalKalori2 = extras.getInt("totalLunch");
}
您尚未将totalLunch放入捆绑包中，因此您不应该尝试get它。删除该行。
活动3中的相同事项：
if (extras != null){
totalKalori1 = extras.getInt("totalBreakfast");
totalKalori2 = extras.getInt("totalLunch");
totalKalori3 = extras.getInt("totalDinner");
}
您尚未将totalDinner放入捆绑包中，因此您不应该尝试get它。删除该行。
然后在Calculate All中你设置了一个不必要的意图并重新开始活动...这对我来说就像是会导致一个infintie循环：
Intent n= new Intent(this, CalculateAll.class);
n.putExtra("totalBreakfast", totalKalori1);
n.putExtra("totalLunch", totalKalori2);
n.putExtra("totalDinner", totalKalori3);
startActivity(n);
从'CalculateAll`活动中删除整个部分。
我认为移动getExtra部分并删除不良数据将解决您的问题。
答案 1 :(得分：4)
您有几种选择：
Application类来创建该类，然后您可以通过调用getApplication()方法在活动中访问该类。阅读documentation，了解在应用程序中存储和检索数据的所有可用方法。
答案 2 :(得分：2)
你有一些可能性。
我更喜欢的是使用应用程序上下文......
创建一个新类，如：
public class DataApp extends Application{
private int myInt;
private MyCustomObject myObj;
public int getMyInt() { return myInt; }
public void setMyInt(int i) { this.myInt = i; }
public MyCustomObject getMyObj() { return myObj; }
public void setMyObj(MyCustomObject ob) { this.myObj = ob;}
}
将此添加到您的清单：
<application
android:name=".DataApp"
...>
...
</application>
之后，当您需要传递数据时，您可以在您的活动中执行此操作：
DataApp dataInfo = (DataApp)getApplicationContext();
//set some data:
dataInfo.setMyObj(/*put the object*/);
在你的其他活动中，你会得到这样的对象：
DataApp dataInfo = (DataApp)getApplicationContext();
MyCustomObject obj = dataInfo.getMyObj();
使用此选项，您可以传递所需的每种对象类型。
答案 3 :(得分：0)
将数据从一个活动传递到另一个活动的推荐方法是通过意图。
答案 4 :(得分：0)
要使用意图，请执行以下操作：
private String fUserName;
private String fPassword;
private Boolean fUseProxy;
private String fProxyAddress;
private Integer fProxyPort;
/** Called when the activity is first created. */
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dashboard_activity);
fProjectsButton = (Button) findViewById(R.id.dashProjectsButton);
fUserName = "something";
fPassword = "xxx";
fUseProxy = false;
fProxyAddress = "";
fProxyPort = 80;
fProjectsButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(CodeBaseClientDashBoardActivity.this, CodeBaseClientProjectsActivity.class);
i.putExtra(CodeBaseClientSettingsActivity.PREFERENCE_API_USERNAME, fUserName);
i.putExtra(CodeBaseClientSettingsActivity.PREFERENCE_PASSWORD, fPassword);
i.putExtra(CodeBaseClientSettingsActivity.PREFERENCE_USE_PROXY, fUseProxy);
i.putExtra(CodeBaseClientSettingsActivity.PREFERENCE_PROXY_ADDRESS, fProxyAddress);
i.putExtra(CodeBaseClientSettingsActivity.PREFERENCE_PROXY_PORT, fProxyPort);
startActivity(i);
}
});
}
答案 5 :(得分：0)
我在活动中使用了一种方法来调用另一个活动。 它以两个变量（简历和玩家数量）开始游戏。
private void MethodToCallAnotherActivity(int resume, int players) {
Intent intent = new Intent(CurrentActivity.this, NextActivity.class);
intent.putExtra(NextActivity.RESUME, resume);
intent.putExtra(NextActivity.PLAYERS, players);
startActivity(intent);
}
在NextActivity的'onCreate'中，我使用了
int resume = getIntent().getIntExtra(Game.RESUME, 1);
读取我想要的变量。
祝你好运！