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用火箭筒使用LongClick
原标题:Class file errors when using onLongClick with setText

我制定了这一微薄的方案,以尝试和学习各州和文本。 在试图利用LongClick号发射机时,我已接近部队。 当我看一看小差错时,我看到第45条分界线的无点例外。

我看一看一整块“Class案错误:没有发现来源”错误在“无效者”后面。 我试图把所附来源点到 Java弧和roid。 jar 案卷,但似乎都没有固定。

法典是:

package com.PickSomeButtons;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.Button;
import android.view.View.OnLongClickListener;

public class PickSomeButtons extends Activity {

    RadioButton myButton0;
    RadioButton myButton1;
    TextView myAnswer;
    TextView holdMeAnswer;
    Button longClickButton;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        myButton0=(RadioButton)findViewById(R.id.radio0);
        myButton1=(RadioButton)findViewById(R.id.radio1);
        myAnswer=(TextView)findViewById(R.id.textView1);
        longClickButton=(Button)findViewById(R.id.button1);

        myButton0.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                myAnswer.setText("Me!");                
            }
        });
        myButton1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                myAnswer.setText("Not me!");
            }
        });

        longClickButton.setOnLongClickListener(new Button.OnLongClickListener() {

            public boolean onLongClick(View v) {
                holdMeAnswer.setText("Nope!");
                return true;
            }
        });
    }
}
问题回答

在你即将到来的方法中,你先把我的Answer开了,但没有安索。 因此,MeAnswer公司是无效的。

You might try enabling more of the warnings in Eclipse under Preferences > Java > Compiler > Errors/Warnings. I think there might be a warning for uninitialized private members (as an aside, those members should probably be private).





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