我在我的 XML 文件中使用 onClick 设置了一个方法名称，但应用程序似乎找不到它。我认为这是因为应该使用警报对话框的按钮调用该方法。任何想法，将不胜感激！
主要活动：
public class MainActivity extends Activity {
String TAG = "MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
public void recordExpenditure(View v) {
Log.v(TAG, "User clicked Record Expenditure button");
// custom dialog
final Dialog dialog = new Dialog(v.getContext());
dialog.setContentView(R.layout.add_expenditure_dialog_layout);
dialog.setTitle("Add new expenditure");
dialog.show();
}
public void viewExpenditure(View v) {
Log.v(TAG, "User clicked View Expenditure button");
}
public void saveExpenditure(View v) {// <---- Can't find this
DatabaseHandler db = new DatabaseHandler(this);
// Inserting Contacts
Log.d(TAG, "Inserting new expenditure into database");
Log.v(TAG, "User clicked Save Expenditure button");
EditText saveExpenditureTitleText = (EditText)findViewById(R.id.expenditureTitleBox);
EditText saveExpenditureValue = (EditText)findViewById(R.id.expenditureValueBox);
String expenditureText = saveExpenditureTitleText.getText().toString();
String expenditureValue = saveExpenditureValue.getText().toString();
db.addExpenditure(new Expenditure(expenditureText, expenditureValue));
Log.v(TAG, "Recording expenditure details...\nExpenditure Title: " + expenditureText + "\nExpenditure Value: " + expenditureValue);
}
public void cancelExpenditure(View v) {
Log.v(TAG, "User clicked Cancel Expenditure button");
}
}
主布局.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<Button
android:id="@+id/recordExpenditure"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="100dp"
android:text="Add Expenditure"
android:onClick="recordExpenditure" />
<Button
android:id="@+id/viewExpenditure"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/recordExpenditure"
android:layout_below="@+id/recordExpenditure"
android:layout_marginTop="45dp"
android:text="View Expenditure"
android:onClick="viewExpenditure" />
</RelativeLayout>
对话框.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/expenditureValueText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/expenditureTitleBox"
android:text="Expenditure Value" />
<TextView
android:id="@+id/expenditureTitleText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Expenditure Title" />
<EditText
android:id="@+id/expenditureTitleBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/expenditureTitleText"
android:ems="10" />
<EditText
android:id="@+id/expenditureValueBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/expenditureValueText"
android:ems="10"
android:inputType="numberDecimal" >
<requestFocus />
</EditText>
<Button
android:id="@+id/saveExpenditureDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/expenditureValueBox"
android:text="Save"
android:onClick="saveExpenditure" /> <---- Can't find this
<Button
android:id="@+id/cancelExpenditureDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/saveExpenditureDetails"
android:layout_alignBottom="@+id/saveExpenditureDetails"
android:layout_alignRight="@+id/expenditureValueBox"
android:text="Cancel"
android:onClick="cancelExpenditure" />
</RelativeLayout>
错误：
09-15 21:12:37.411: E/AndroidRuntime(818): FATAL EXCEPTION: main
09-15 21:12:37.411: E/AndroidRuntime(818): java.lang.IllegalStateException: Could not find a method saveExpenditure(View) in the activity class android.view.ContextThemeWrapper for onClick handler on view class android.widget.Button with id 'saveExpenditureDetails'
09-15 21:12:37.411: E/AndroidRuntime(818): at android.view.View$1.onClick(View.java:3578)