按钮在android片段中不起作用

Rorrim 发表于 Dev

罗里姆

我正在开发一个应用程序，并且有以下代码：

package com.S.A.Productions.android.first;

import com.S.A.Productions.android.first.R;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

public class FirstActivity extends Fragment implements OnClickListener {

    int counter;

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        super.onCreate(savedInstanceState);

                View v = inflater.inflate(R.layout.lin, container, false);

        TextView temp = (TextView) v.findViewById(R.id.textView2);

        //Set the buttons
        Button button2 = (Button) v.findViewById(R.id.button2);


        //+++ BUTTON
        button2.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub//Get content of TextView
                TextView temp = (TextView) v.findViewById(R.id.textView2);
                //Convert the string to an integer
                counter = Integer.parseInt(temp.getText().toString());
                counter++;
                temp.setText("" + counter);
                String stringData = temp.getText().toString();
                SharedPreferences.Editor editor = someData.edit();
                editor.putString("sharedString", stringData);
                editor.commit();
            }

        });
        //END OF +++ BUTTON

        return v;
    }


}

但是，当我运行该应用程序并单击该按钮时，该应用程序崩溃了。我使用的是“ v.findViewById”，最后我返回了v。所以我不知道到底是什么错。有任何想法吗？

阿玛比特

冲突来，因为视图v内的onclick和膨胀视图v是不同的。该代码将起作用：

public class FirstActivity extends Fragment implements OnClickListener {

int counter;
View v ;

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
    super.onCreate(savedInstanceState);

            v = inflater.inflate(R.layout.lin, container, false);

    TextView temp = (TextView) v.findViewById(R.id.textView2);

    //Set the buttons
    Button button2 = (Button) v.findViewById(R.id.button2);


    //+++ BUTTON
    button2.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub//Get content of TextView
            TextView temp = (TextView) this.v.findViewById(R.id.textView2);
            //Convert the string to an integer
            counter = Integer.parseInt(temp.getText().toString());
            counter++;
            temp.setText("" + counter);
            String stringData = temp.getText().toString();
            SharedPreferences.Editor editor = someData.edit();
            editor.putString("sharedString", stringData);
            editor.commit();
        }

    });
    //END OF +++ BUTTON

    return v;
  }
}