我特别需要"设置"设置,我有4个选项(年龄,身高,体重和性别)列表。现在,每个列表项必须打开新的"查看" (活动,窗口),它实际上没有做太多。 EG,性别是单选按钮和" OK"按钮,然后将性别保存在共享首选项中。
所以,我有很好的想法来创建"设置"类,然后以某种方式处理这个。当选择第1项时,它将显示layout1.xml并从Settings类调用function1。
Item2调用layout2.xml并从Settings类调用function2。
这是一种好的方法,还是我应该为每一帧创建类,并且有一些小的" GenderSelector"实际上只做处理单选按钮的类?
答案 0 :(得分:1)
使用指定模式启动活动的代码片段(模式常量定义如下):
public class SettingsActivity extends Activity
{
public static final String EXTRA_MODE = "your_mode_extra_name";
public static final int MODE_AGE = 0;
public static final int MODE_GENDER = 1;
private static final int MODE_DEFAULT = MODE_AGE;
@Override
public void onCreate(Bundle savedInstance)
{
int mode = getIntent().getIntExtra(EXTRA_MODE, MODE_DEFAULT);
switch(mode)
{
case MODE_AGE:
setContentView(R.layout.age_mode_layout);
//TODO: find controls by ID and set their event handlers here
break;
case MODE_GENDER:
setContentView(R.layout.age_mode_gender);
//TODO: find controls by ID and set their event handlers here
break;
}
}
}
返回性别的代码段:
public class SettingsActivity extends Activity
{
public static final String EXTRA_GENDER = "your_gender_extra_name";
public static final int GENDER_FEMALE = 0;
public static final int GENDER_MALE = 1;
private void returnGender(int gender)
{
setResult(RESULT_OK, new Intent().putExtra(EXTRA_GENDER, gender));
finish();
}
}
最后显示设置活动并返回结果:
public class MainActivity extends Activity
{
//actually we could use mode constants from SettingsActivity;
//just to show that generally this is separate constants set
private static final int ID_AGE = 0;
private static final int ID_GENDER = 1;
private void requestAge()
{
Intent intent = new Intent(getApplicationContext(), SettingsActivity.class);
intent.putExtra(SettingsActivity.EXTRA_MODE, SettingsActivity.MODE_AGE);
startActivityForResult(intent, ID_AGE);
}
private void requestGender()
{
Intent intent = new Intent(getApplicationContext(), SettingsActivity.class);
intent.putExtra(SettingsActivity.EXTRA_MODE, SettingsActivity.MODE_GENDER);
startActivityForResult(intent, ID_GENDER);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (resultCode != RESULT_OK)
return; //something went wrong
switch(requestCode)
{
case ID_GENDER:
int gender = data.getIntExtra(SettingsActivity.EXTRA_GENDER, -66666);
//you've got the gender, use it
break;
case ID_AGE:
//get age from the intent and use it
break;
}
}
}