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ndroid学习笔记-Activity&Intent

2024-08-01 19:11:10   220人阅读

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界面activity_main.xml

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<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

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<?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

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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

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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);
    }
}

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ndroid学习笔记-Activity&Intent


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