Android应用间数据传递示例-优快云博客

本文介绍了一个简单的Android应用程序示例，展示了如何在两个活动（Activity）之间传递字符串数据。通过Intent携带数据并使用getStringExtra方法接收，实现了基本的数据交互功能。

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package com.hx.data;

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

import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
	
	private String KEY="my_key";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	
		final Activity activity = this;
		Button button = (Button) findViewById(R.id.button);
		button.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View view) {
				
				Intent intent = new Intent(activity,ActivityB.class);
				intent.putExtra(KEY, "对面的女孩看过来！");
				startActivity(intent);
			}
		});
	}

}

package com.hx.data;

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

public class ActivityB extends Activity{

	private String KEY="my_key";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
	
		Intent intent =  this.getIntent();
		
		String str = intent.getStringExtra(KEY);
		TextView tv = new TextView(this);
		tv.setText("传递过来的数据是："+str);
		setContentView(tv);
	}
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.hx.data"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="15"
        android:targetSdkVersion="15" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
       
        <span style="color:#ff0000;"><activity
            android:name=".ActivityB"
            android:label="@string/app_name" >
            
        </activity></span>
   
        </application>

</manifest>