android应用开发详解（十四）-------------Intent的Extras属性（续）

如果你没瞎，就别从别人嘴里了解自己。

1、工程目录

2、MainActivity.java

package com.example.test_intent_extras;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {
	private Button myBtn;
	private EditText myEdit;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        myEdit=(EditText)findViewById(R.id.edit01);
        myBtn=(Button)findViewById(R.id.button01);
        myBtn.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
			    /*利用Bundle传值
				Intent intent = new Intent(MainActivity.this,SecondActivity.class);
				Bundle b = new Bundle();
				String str_edit = myEdit.getText().toString();
				b.putString("str", str_edit);
				intent.putExtras(b);
				startActivity(intent);
				*/
				//利用Intent的Extras属性
				Intent intent = new Intent();
				intent.setClass(MainActivity.this, SecondActivity.class);
				intent.putExtra("str", myEdit.getText().toString());
				startActivity(intent);
			}
		});
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}

SecondActivity.java

package com.example.test_intent_extras;

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

public class SecondActivity extends Activity {
	private TextView myTextView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.second);
		myTextView = (TextView) findViewById(R.id.text01);
	    /*利用Bundle传值
		Intent i = getIntent();
		Bundle bb = i.getExtras();
		String s = bb.getString("str");
		myTextView.setText(s);
		*/
		//利用Intent的Extras属性
		Intent i = this.getIntent();
		myTextView.setText(i.getStringExtra("str"));

	}

}

3、布局文件

main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/edit01"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="" />

    <Button
        android:id="@+id/button01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示" />

</LinearLayout>

second.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/text01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="" />

</LinearLayout>

4、结果演示