我有一个布局中的按钮，该按钮设置为 On Click = calculateClickHandler 单击该按钮时，应用程序将关闭并显示以下 logcat。我不确定这是否是因为我试图在 Fragment 中执行此操作并且应该在主要活动中执行此操作？
任何帮助深表感谢。
10-23 15:59:30.929: E/AndroidRuntime(22388): FATAL EXCEPTION: main
10-23 15:59:30.929: E/AndroidRuntime(22388): java.lang.IllegalStateException: Could not find a method calculateClickHandler(View) in the activity class com.HealthKicks.bodystats.admob.MainActivity for onClick handler on view class android.widget.Button with id 'calculatewaist'
10-23 15:59:30.929: E/AndroidRuntime(22388): at android.view.View$1.onClick(View.java:3620)
10-23 15:59:30.929: E/AndroidRuntime(22388): at android.view.View.performClick(View.java:4240)
10-23 15:59:30.929: E/AndroidRuntime(22388): at android.view.View$PerformClick.run(View.java:17721)
10-23 15:59:30.929: E/AndroidRuntime(22388): at android.os.Handler.handleCallback(Handler.java:730)
10-23 15:59:30.929: E/AndroidRuntime(22388): at android.os.Handler.dispatchMessage(Handler.java:92)
10-23 15:59:30.929: E/AndroidRuntime(22388): at android.os.Looper.loop(Looper.java:137)
10-23 15:59:30.929: E/AndroidRuntime(22388): at android.app.ActivityThread.main(ActivityThread.java:5103)
10-23 15:59:30.929: E/AndroidRuntime(22388): at java.lang.reflect.Method.invokeNative(Native Method)
10-23 15:59:30.929: E/AndroidRuntime(22388): at java.lang.reflect.Method.invoke(Method.java:525)
10-23 15:59:30.929: E/AndroidRuntime(22388): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
10-23 15:59:30.929: E/AndroidRuntime(22388): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-23 15:59:30.929: E/AndroidRuntime(22388): at dalvik.system.NativeStart.main(Native Method)
10-23 15:59:30.929: E/AndroidRuntime(22388): Caused by: java.lang.NoSuchMethodException: calculateClickHandler [class android.view.View]
10-23 15:59:30.929: E/AndroidRuntime(22388): at java.lang.Class.getConstructorOrMethod(Class.java:423)
10-23 15:59:30.929: E/AndroidRuntime(22388): at java.lang.Class.getMethod(Class.java:787)
10-23 15:59:30.929: E/AndroidRuntime(22388): at android.view.View$1.onClick(View.java:3613)
10-23 15:59:30.929: E/AndroidRuntime(22388): ... 11 more
这是片段代码：
package com.HealthKicks.bodystats.admob;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.TextView;
public class DummySectionFragment1 extends Fragment {
Button calculatewaist;
EditText waist_edit_text1;
RadioGroup gender_radio_group1;
RadioButton gender_radio_male, gender_radio_female;
Spinner waist_spinner;
TextView ideal, high, veryhigh;
String waist_unit, waist;
public static final String ARG_SECTION_NUMBER = "section_number";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.waist, container, false);
// get the references to the widgets
waist_spinner = (Spinner) rootView.findViewById(R.id.waist_spinner);
waist_edit_text1 = (EditText) rootView.findViewById(R.id.waist_edit_text1);
ideal = (TextView) rootView.findViewById(R.id.ideal);
high = (TextView) rootView.findViewById(R.id.high);
veryhigh = (TextView) rootView.findViewById(R.id.veryhigh);
gender_radio_male = (RadioButton) rootView.findViewById(R.id.gender_radio_male);
gender_radio_female = (RadioButton) rootView.findViewById(R.id.gender_radio_female);
calculatewaist = (Button) rootView.findViewById(R.id.calculatewaist);
return rootView;
}
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
calculateClickHandler(view);
}
void calculateClickHandler(View view) {
// TODO Auto-generated method stub
if (view.getId() == R.id.calculatewaist) {
// Get the users values from the widget references
waist_unit = waist_spinner.getSelectedItem().toString();
float waist = Float.parseFloat(waist_edit_text1.getText().toString());
// Convert Inches to CM
if (waist_unit.equals("INCHES")) {
waist = (float) (waist * 2.54);
}
// Interpret what Waist Circumference result means for male
if (waist < 94 && (gender_radio_male.isChecked())){
ideal.setTextColor(getResources().getColor(R.color.title_color));
} else if (waist < 103 && (gender_radio_male.isChecked())) {
high.setTextColor(getResources().getColor(R.color.title_color));
} else if (waist > 102 && (gender_radio_male.isChecked())) {
veryhigh.setTextColor(getResources().getColor(R.color.title_color));
}
// Interpret what Waist Circumference result means for female
if (waist < 80 && (gender_radio_female.isChecked())) {
ideal.setTextColor(getResources().getColor(R.color.title_color));
} else if (waist < 89 && (gender_radio_female.isChecked())) {
high.setTextColor(getResources().getColor(R.color.title_color));
} else if (waist > 88 && (gender_radio_female.isChecked())) {
veryhigh.setTextColor(getResources().getColor(R.color.title_color));
}
};
}
}
和主要活动代码：
package com.HealthKicks.bodystats.admob;
import java.util.Locale;
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.TextView;
public class MainActivity extends FragmentActivity implements
ActionBar.TabListener {
EditText waist_edit_text1;
RadioGroup gender_radio_group1;
RadioButton gender_radio_male, gender_radio_female;
Spinner waist_spinner;
TextView ideal, high, veryhigh;
String waist_unit, waist;
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link android.support.v4.app.FragmentPagerAdapter} derivative, which
* will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {@link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Set up the action bar.
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create the adapter that will return a fragment for each of the three
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(
getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager
.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by
// the adapter. Also specify this Activity object, which implements
// the TabListener interface, as the callback (listener) for when
// this tab is selected.
actionBar.addTab(actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
private final String TAG = "Main Activity";
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case R.id.Refresh:
Log.i(TAG, "Refresh Item Clicked");
return true;
}
switch (item.getItemId())
{
case R.id.Info:
Log.i(TAG, "Info Item Clicked");
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onTabSelected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabReselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
switch (position) {
case 0:
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
return fragment;
case 1:
Fragment fragment1 = new DummySectionFragment1();
Bundle args1 = new Bundle();
args1.putInt(DummySectionFragment1.ARG_SECTION_NUMBER, position + 2);
fragment1.setArguments(args1);
return fragment1;
case 2:
Fragment fragment2 = new DummySectionFragment2();
Bundle args2 = new Bundle();
args2.putInt(DummySectionFragment2.ARG_SECTION_NUMBER, position + 3);
fragment2.setArguments(args2);
return fragment2;
case 3:
Fragment fragment3 = new DummySectionFragment3();
Bundle args3 = new Bundle();
args3.putInt(DummySectionFragment3.ARG_SECTION_NUMBER, position + 4);
fragment3.setArguments(args3);
return fragment3;
default:
return null;
}
}
@Override
public int getCount() {
// Show 4 total pages.
return 4;
}
@Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
case 3:
return getString(R.string.title_section4).toUpperCase(l);
}
return null;
}
}
}