Java 如何修改TextView的内容
我完全按照指南创建了我的第一个Android应用程序,但是发布的代码给了我一个错误。显然没有TextView.setText(String)方法,我下面的代码没有编译:Java 如何修改TextView的内容,java,android,Java,Android,我完全按照指南创建了我的第一个Android应用程序,但是发布的代码给了我一个错误。显然没有TextView.setText(String)方法,我下面的代码没有编译: package com.example.myfirstapp; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import
package com.example.myfirstapp;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class DisplayMessageActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_message);
}
// Get the Intent that started this activity and extract the string
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
// Capture the layout's TextView and set the string as its text
TextView textView = (TextView)findViewById(R.id.textView);
textView.setText(message);
}
错误消息:无法解析符号“setText”
有人能帮忙吗?您需要执行
findviewbyd
和textView.setText(消息)代码>
内部onCreate()
方法
试试这个
public class DisplayMessageActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_message);
// Get the Intent that started this activity and extract the string
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
// Capture the layout's TextView and set the string as its text
TextView textView = (TextView)findViewById(R.id.textView);
textView.setText(message);
}
}
尝试以下方法(您必须将这些行放入您的方法中):
您不可能完全按照教程进行操作,因为您用}括号关闭了onCreate方法,并将所有其他命令放在类的主体中,任何方法之外。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_message);
//Get the Intent that started this activity and extract the string
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
// Capture the layout's TextView and set the string as its text
TextView textView = (TextView)findViewById(R.id.textView);
textView.setText(message);**
}