界面activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.activity02.MainActivity" >

    <!--
         <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    -->

    <EditText
        android:id="@+id/usernameEditText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" 
        android:hint="username"/>

    <Button
        android:id="@+id/myButton"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" 
        android:layout_below="@+id/usernameEditText"/>
    
    <Button
        android:id="@+id/sendButton"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" 
        android:layout_below="@+id/myButton"/>

</RelativeLayout>

界面otheractivity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <TextView
        android:id="@+id/myTextView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />

</LinearLayout>

MainActivity.java

public class MainActivity extends ActionBarActivity {

	private Button myButton;
	private Button sendButton;
	private EditText usernameEditText;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        myButton = (Button) findViewById(R.id.myButton);
        myButton.setText("传值");
        
        sendButton = (Button) findViewById(R.id.sendButton);
        sendButton.setText("发短信");
        
        usernameEditText = (EditText) findViewById(R.id.usernameEditText);
        
        myButton.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				
				//Intent intent = new Intent(MainActivity.this, OtherActivity.class);
				Intent intent = new Intent();
				intent.setClass(MainActivity.this, OtherActivity.class);
				String username = usernameEditText.getText().toString();
				intent.putExtra("username", username);
				MainActivity.this.startActivity(intent);
				//startActivity(intent);
			}
		});
        
        sendButton.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				//调用发端信的程序
				Uri uri = Uri.parse("smsto:18513430780");
				Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
				intent.putExtra("sms_body", "The SMS text");
				startActivity(intent);
				
			}
		});
    }

}

OtherActivity.java

public class OtherActivity extends Activity{

	private TextView myTextView;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		Toast.makeText(getApplicationContext(), "click", Toast.LENGTH_SHORT).show();
		setContentView(R.layout.otheractivity);
		myTextView = (TextView) findViewById(R.id.myTextView);
		
		String username = getIntent().getStringExtra("username");
		
		myTextView.setText("传过来的值是：" + username);
	}
}

本文出自 “阿凡达” 博客，请务必保留此出处http://shamrock.blog.51cto.com/2079212/1575773

Android学习笔记-Activity&Intent