android利用startActivityForResult()方法得到另一個Activity的傳回值

第一個Activity

[java]
package yyy.testandroid5; 
 
import android.app.Activity; 
import android.content.ComponentName; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
 
public class TestAndroid5Activity extends Activity { 
    private EditText edit; 
    private Button button; 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
        edit = (EditText) findViewById(R.id.edit); 
        button = (Button) findViewById(R.id.button); 
         
        button.setOnClickListener(new OnClickListener() { 
            @Override 
            public void onClick(View arg0) { 
                // TODO Auto-generated method stub 
                //開啟第二個Activity 
                Intent intent = new Intent();   
                intent.setComponent(new ComponentName("yyy.testandroid6", "yyy.testandroid6.TestAndroid6Activity"));   
                intent.setAction(Intent.ACTION_VIEW);   
                intent.putExtra("test", edit.getText().toString()); 
                startActivityForResult(intent, 0);   
            } 
        }); 
         
    } 
    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
        // TODO Auto-generated method stub 
        super.onActivityResult(requestCode, resultCode, data); 
        if(requestCode == 0){ 
            edit.setText(data.getStringExtra("return")); 
        } 
    } 
     
} 
第二個Activity

[java]
import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 
 
public class TestAndroid6Activity extends Activity { 
     
    private TextView text; 
    private EditText edit; 
    private Button button; 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
        edit = (EditText) findViewById(R.id.edit); 
        button = (Button) findViewById(R.id.button); 
        String str = getIntent().getStringExtra("test"); 
        edit.setText(str); 
         
        button.setOnClickListener(new OnClickListener() { 
            @Override 
            public void onClick(View arg0) { 
                // TODO Auto-generated method stub 
                //添加給第一個Activity的傳回值，並設定resultCode 
                Intent intent = new Intent(); 
                intent.putExtra("return", edit.getText().toString()); 
                setResult(RESULT_OK, intent); 
                finish(); 
            } 
        }); 
    } 
} 

 

摘自 Central-Perk的專欄