在我的项目中，我有几个 onClick 侦听器，它们都很好，但是一个，我在代码中找不到和错误，如果我删除代码并重新输入并保存它，如果我关闭并且没有错误，那就很好eclipse 又卷土重来，变量无法再次解决。
这是代码中无法解决的地方：
Button webButton = (Button) newStockRow.findViewById(R.id.webButton);
webButton.setOnClickListener(getStockFromWebClickListener);
这就是我创建它的方式：
public OnClickListener getStockFromWebClickListener = new OnClickListener(){
@Override
public void onClick(View arg0) {
TableRow tableR = (TableRow) arg0.getParent();
TextView stock = (TextView) tableR.findViewById(R.id.stockSymbolTextView);
String stockSymbol = stock.getText().toString();
String stockURL = getString(R.string.yahoo_stock_url) + stockSymbol;
Intent getStockWebPage = new Intent(Intent.ACTION_VIEW, Uri.parse(stockURL));
startActivity(getStockWebPage);
}
};
完整文件的代码：
package com.gscore.quotestock;
import java.util.Arrays;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
public class StockQ extends Activity {
public final static String STOCK_SYMBOL = "com.gscore.quotestock.STOCK";
private SharedPreferences stockSymbolsEntered;
private TableLayout stockTableScrollView;
private EditText stockSymbolET;
Button enterStockSymbolButton;
Button deleteStocksButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_stock_q);
// Get user stock list
stockSymbolsEntered = getSharedPreferences("stockList", MODE_PRIVATE);
// Initialize UI components
stockTableScrollView = (TableLayout) findViewById(R.id.stockTableLayout);
stockSymbolET = (EditText) findViewById(R.id.stockSymbolEditText);
enterStockSymbolButton= (Button) findViewById(R.id.enterButton);
deleteStocksButton= (Button) findViewById(R.id.deleteAllButton);
// Set ClickListeners
enterStockSymbolButton.setOnClickListener(enterButtonClickListener);
deleteStocksButton.setOnClickListener(deleteButtonClickListener);
updateSavedStockList(null);
}
private void updateSavedStockList(String newStockSymbol){
String[] stocks = stockSymbolsEntered.getAll().keySet().toArray(new String[0]);
Arrays.sort(stocks, String.CASE_INSENSITIVE_ORDER);
if (newStockSymbol != null){
insertStockInStockTable(newStockSymbol, Arrays.binarySearch(stocks, newStockSymbol));
} else {
for(int i = 0; i < stocks.length; i++){
insertStockInStockTable(stocks[i], i);
}
}
}
private void saveStockSymbol(String newStock){
String isTheStockNew = stockSymbolsEntered.getString(newStock, null);
SharedPreferences.Editor preferencesEditor = stockSymbolsEntered.edit();
preferencesEditor.putString(newStock, newStock);
preferencesEditor.commit();
if(isTheStockNew == null){
updateSavedStockList(newStock);
}
}
private void insertStockInStockTable(String stock, int arrayIndex){
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View newStockRow = inflater.inflate(R.layout.stock_quote_row, null);
TextView newStockTextView = (TextView) newStockRow.findViewById(R.id.stockSymbolTextView);
newStockTextView.setText(stock);
Button stockQuoteButton = (Button) newStockRow.findViewById(R.id.stockQuoteButton);
stockQuoteButton.setOnClickListener(getStockActivityListener);
Button webButton = (Button) newStockRow.findViewById(R.id.webButton);
webButton.setOnClickListener(getStockFromWebClickListener);
stockTableScrollView.addView(newStockRow, arrayIndex);
}
public OnClickListener enterButtonClickListener= new OnClickListener(){
@Override
public void onClick(View v) {
if(stockSymbolET.getText().length() > 0){
saveStockSymbol(stockSymbolET.getText().toString());
stockSymbolET.setText("");
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(stockSymbolET.getWindowToken(), 0);
} else {
AlertDialog.Builder builder = new AlertDialog.Builder(StockQ.this);
builder.setTitle(R.string.invalid_stock_symbol);
builder.setPositiveButton(R.string.ok, null);
builder.setMessage(R.string.missing_stock_symbol);
AlertDialog theAlertDialog = builder.create();
theAlertDialog.show();
}
}
};
private void deleteAllStocks(){
stockTableScrollView.removeAllViews();
}
public OnClickListener deleteButtonClickListener = new OnClickListener(){
@Override
public void onClick(View v) {
deleteAllStocks();
SharedPreferences.Editor preferencesEditor = stockSymbolsEntered.edit();
preferencesEditor.clear();
preferencesEditor.commit();
}
};
public OnClickListener getStockActivityListener = new OnClickListener(){
@Override
public void onClick(View v) {
TableRow tableR = (TableRow) v.getParent();
TextView stock = (TextView) tableR.findViewById(R.id.stockSymbolTextView);
String stockSymbol = stock.getText().toString();
Intent intent = new Intent(StockQ.this, StockInfoActivity.class);
intent.putExtra(STOCK_SYMBOL, stockSymbol);
startActivity(intent);
}
};
public OnClickListener getStockFromWebClickListener = new OnClickListener(){
@Override
public void onClick(View arg0) {
TableRow tableR = (TableRow) arg0.getParent();
TextView stock = (TextView) tableR.findViewById(R.id.stockSymbolTextView);
String stockSymbol = stock.getText().toString();
String stockURL = getString(R.string.yahoo_stock_url) + stockSymbol;
Intent getStockWebPage = new Intent(Intent.ACTION_VIEW, Uri.parse(stockURL));
startActivity(getStockWebPage);
}
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
//getMenuInflater().inflate(R.menu.stock_q, menu);
return true;
}
}