[英]Hello World Android Tutorial
I am running the Hello World app successfully through an emulator (with Eclipse). 我通过模拟器(使用Eclipse)成功运行Hello World应用程序。 I have followed every step from the android website.
我已经关注了android网站的每一步。 The app runs and gives me the option to enter a String and click Send.
该应用程序运行并为我提供输入字符串的选项,然后单击发送。 Unfortunately, when I click send, nothing happens.
不幸的是,当我点击发送时,没有任何反应。 I have completed this app through the tutorial, and I have tried setting the message to something within the code, but no success.
我已经通过教程完成了这个应用程序,我尝试将消息设置为代码中的某些内容,但没有成功。 It is my best guess that DisplayMessageActivity.java is not running, because I have tried giving the message to be displayed a preset String, but have not been successful.
我最好猜测DisplayMessageActivity.java没有运行,因为我试图让消息显示一个预设的字符串,但是没有成功。 I know this is a fairly vague question, but I cannot seem to find the next step to solve this problem, hence the question.
我知道这是一个相当含糊的问题,但我似乎无法找到解决这个问题的下一步,因此问题。 Thanks!
谢谢! Let me know if you need to see any additional code;
如果您需要查看任何其他代码,请告诉我们; here is my code for MainActivity.java:
这是我的MainActivity.java代码:
package com.example.myfirstapp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends Activity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
// @Override
// public boolean onCreateOptionsMenu(Menu menu) {
// // Inflate the menu; this adds items to the action bar if it is present.
// getMenuInflater().inflate(R.menu.activity_main, menu);
// return true;
// }
//** Called when the user clicks the Send button *
public void sendMessage(View view){
//Do something in response to the button
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
}
}
You need to call startActivity (intent);
你需要调用
startActivity (intent);
from your sendMessage()
. 来自你的
sendMessage()
。 Put it right before the closing brace. 把它放在关闭支架前面。
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