Project——Activity之间的数据传递（关闭Actiity时返回数据）

1、

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="cn.itcast.mulactivity"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <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>
  <activity android:name=".OtherActivity" android:label="新Activity"/>
    </application>
    <uses-sdk android:minSdkVersion="8" />

</manifest>

2、

package cn.itcast.mulactivity;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        Button button = (Button)this.findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {   
   @Override
   public void onClick(View v) {
    Intent intent = new Intent(MainActivity.this, OtherActivity.class);
    //intent.setClass(MainActivity.this, OtherActivity.class);
    //intent.setComponent(new ComponentName(MainActivity.this, OtherActivity.class));
    
    //intent.putExtra("name", "传智播客");
    //intent.putExtra("age", 4);
    Bundle bundle = new Bundle();
    bundle.putString("name", "传智播客");
    bundle.putInt("age", 4);
    intent.putExtras(bundle);
    
    //startActivity(intent);//打开(激活)Activity
    startActivityForResult(intent, 100);
   }
  });
    }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  Toast.makeText(this, data.getStringExtra("result"), 1).show();
  
  super.onActivityResult(requestCode, resultCode, data);
 }
   
   
}

 

3、

package cn.itcast.mulactivity;

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

public class OtherActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  setContentView(R.layout.other);
  
  TextView resultView = (TextView)this.findViewById(R.id.result);
  Intent intent = getIntent();
  String name = intent.getExtras().getString("name");
  int age = intent.getIntExtra("age", 0);
  
  resultView.setText("名称："+ name+ ",年限："+ age);
  
  Button button = (Button)this.findViewById(R.id.button);
         button.setOnClickListener(new View.OnClickListener() {   
    @Override
    public void onClick(View v) {
     Intent data = new Intent();
     data.putExtra("result", "这是返回数据");
     setResult(900, data);
     finish();//关闭当前Activity
    }
   });
 }

}