Question

有人知道为什么这个程序不会显示“Hey”字符串(模拟器)吗? 相反,它会显示“大文本 ” 。

package com.seba.numberShow;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

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

       TextView tv = (TextView) findViewById(R.id.textView1);
       tv.setText("hey");
    }
}

Answer 1

in your xml: your textView id parameter is not same as in java code, here:

TextViewById(R.id.textView1); = (TextView) 找到ViewById(R.id.textView1);

检查资源ID

R. id. textView1 这将是不同的

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